Papers
Línea de investigación | Año | Autores | Título | Revista | Resumen |
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Productividad marina | 2018 | Aracena C., González H., Garcés J., Lange C., Pantoja S., Muñoz S., Teca E., Tejos E. | Infuence of summer conditions on surface water properties and phytoplankton productivity in embayments of the South Shetland Islands | Polar Biology | Phytoplankton productivity in glaciomarine embayments of the West Antarctic Peninsula is constrained because of extensive thermohaline variability, which is due to seasonal sea-ice and glacial melting. To determine whether or not this afects the biology of the water column, we explored the infuence of surface water properties on phytoplankton productivity in four embayments of the South Shetland Islands (SSI) during late summer of 2013. We analyzed hydrographic, climatic, and primary productivity satellite data (wind velocity, sea-ice cover, and chlorophyll-a), in situ CTD measurements of physical and chemical characteristics, new estimates of net primary production (NPP), and surface water samples for chlorophylla, nutrients, biogenic silica, and plankton composition...Leer artículo |
Adaptación de las especies marinas | 2017 | Morales K., Sánchez R., Bruning P., Cárdenas L., Manríquez P., Brante A. | A multiple microsatellite assay to evaluate the mating behavior of the intensively exploited marine gastropod Concholepas concholepas | The Nautilus | The study of reproduction and mating beahavior constitutes a main issue in biology, ecology and evolution, given its relation with fitness traits. Here, we developed a simple microsatellite multiple assay to evaluate the mating strategy and male reproductive success of the marine gastropod Concholepas concholepas (Bruguie `re, 1789),an important fishery resource and a key predator species of Chilean rocky shore communities. Concholepas concholepas is a dioecious species with internal fertilization, encapsulation, and long larval phase. Ver PDF |
Productividad marina | 2017 | Quiroga E., Ortiz P., González-Saldías R., Reid B., Tapia F., Pérez-Santos I., Rebolledo L., Mansilla R., Pineda C., Cari I., Salinas N., Montiel A., Gerdes D. | Seasonal patterns in the benthic realm of a glacial fjord (Martinez Channel, Chilean Patagonia): the role of suspended sediment... | Marine Ecology Progress Series | Complex marine−terrestrial interactions characterize Chilean fjords, where benthic communities influence the distribution of organic matter (OM). We examined spatial and seasonal changes in the hydrography, sediment conditions and soft-bottom macrobenthic, meiobenthic, and total microbial biomass in a glacial Patagonian fjord (Martinez Channel, Chile). The transport of a high load of glacial mineral and particulate OM to the fjord in the austral summer coincided with low total live benthic biomass. Ver PDF |
Bentos | 2017 | Rojas-Hernández N., Véliz D., Riveros M., Fuentes J., Pardo L. | Highly Connected Populations and Temporal Stability in Allelic Frequencies of a Harvested Crab from the Southern Pacific Coast | Plos One | For marine invertebrates with a benthic adult form and a planktonic larva phase, the connectivity among populations is mainly based on larval dispersal. While an extended larval phase will promote gene flow, other factors such as an intensive fishery and geographical barriers could lead to changes in genetic variability. In this study, the population genetic structure of the commercial crab Metacarcinus edwardsii was analyzed along 700 km of the Chilean coast. Ver PDF |
Bentos | 2017 | Cruces E., Flores-Molina M., Díaz M., Huovinen P., Gómez I. | Phenolics as photoprotective mechanism against combined action of UVradiation and temperature in the red alga Gracilaria chilensis? | Appl Phycol | The rhodophyte Gracilaria chilensis is a structuring species of the estuarine and fjord systems in southern Chile and is commercially exploited from natural and farmed populations. Due to its capacity to tolerate extreme variations in environmental conditions, this species is an excellent model organism to examine stress tolerance mechanisms. The present study examined the combined effect of temperature and UV radiation on the reproductive phases of G. chilensis (carposporophyte, tetrasporophyte, and vegetative) at the lower and upper intertidals of the Valdivia River estuary. The concentration of phenolic compounds and their antioxidant capacity as well as the inhibition of primary photochemical reactions, measured as the fluorescence of photosystem II, was determined. Ver PDF |
Plancton | 2017 | Davis D., Hofmann E., Klinck J., Piñones A., Dinniman D. | Distributions of Euphausia superba, Euphausia crystallorophias, and Pleuragramma antarcticum and correlations with environmental variables in the western Ross Sea, Antarctica | Marine Ecology Progress Series | Antarctic krill (Euphausia superba), crystal krill (Euphausia crystallorophias), and Antarctic silverfish (Pleuragramma antarcticum) are key mid-trophic level species in the Ross Sea connecting primary production to the upper trophic levels. Distributions of these species were constructed from net-based and acoustic observations collected in the western Ross 24 Sea from 1988-2004. Ver PDF |
Productividad marina | 2017 | Domenici P., Torres R., Manrı́quez P. | Effects of elevated carbon dioxide and temperature on locomotion and the repeatability of lateralization in a keystone marine mollusc | Journal of Experimental Biology | Recent work has shown that the behaviour of marine organisms can be affected byelevated PCO2, although little is known about the effect of multiple stressors. We therefore investigated the effect of elevated PCO2 and temperature on locomotion and behaviour during prey searching in the marine gastropod Concholepas concholepas,a predator characteristic of the southeastern Pacific coast. Ver PDF |
Bentos | 2017 | Fica E., Díaz R., Valdivia N. | General spatial spectral variation in rocky intertidal communities from three biogeographical regions | Journal of Biogeography | Understanding general spatial patterns of multiple species is a central aim of biogeography. Spatial analyses of coastal marine assemblages have shown an emergent pattern in that the variability in population abundances increases with increasing spatial scale of observation; i.e. a “red” spectrum of variation in population abundances. Ver PDF |
Adaptación de las especies y Productividad marina | 2017 | Gaitán-Espitia J., Villanueva P., López J., Torres R., Navarro J., Bacigalupe. | Spatio-temporal environmental variation mediates geographical differences in phenotypic responses to ocean acidification | Biology Letters | Phenotypic plasticity is expected to play a major adaptive role in the response of species to ocean acidification (OA), by providing broader tolerances to changes in pCO2 conditions. However, tolerances and sensitivities to future OA may differ among populations within a species because their particular environmental context and genetic backgrounds. Ver PDF |
Productividad marina | 2017 | Galán A., Thamdrup B., Saldías G., Farías L. | Vertical segregation among pathways mediating nitrogen loss (N2 and N2O production) across the oxygen gradient in a coastal up welling ecosystem | Biogeosciences | The upwelling system off central Chile (36.5◦S) isseasonallysubjectedtooxygen(O2)-deficientwaters,with a strong vertical gradient in O2 (from oxic to anoxic conditions) that spans a few metres (30–50m interval) over the shelf. This condition inhibits and/or stimulates processes involved in nitrogen (N) removal (e.g. anammox, denitrification, and nitrification).Ver PDF |
Productividad marina | 2017 | Gaonkar C., Kooistra W., Lange C., Montresor M., Sarno D. | Two new species in the Chaetoceros socialis complex (Bacillariophyta): C. sporotruncatus and C. dichatoensis, and characterization of its relatives, C. radicans and C. cinctus | Phycological Society of America | The diatom genus Chaetoceros is one of the most abundant and diverse phytoplankton in marine and brackish waters worldwide. Within this genus, Chaetoceros socialis has been cited as one of the most common species. However, recent studies from different geographic areas have shown the presence of pseudo-cryptic diversity within the C. socialis complex. Ver PDF |
Bentos | 2017 | Gebauer P., Paschke K., Vera C., Toro J., Pardo M., Urbina M. | Lethal and sub-lethal effects of commonly used anti-sea lice formulations on non-target crab Metacarcinus edwardsii larvae | Chemosphere | The pesticides used by the salmon industry to treat sea lice, are applied in situ via a bath solution and are subsequently discharged into the surrounding medium. The effects of cypermethrin, deltamethrin, azamethiphos and hydrogen peroxide were assessed on the performance of Metacarcinus edwardsii larvae, an important crab for Chilean fishery. Ver PDF |
Bentos | 2017 | Goecke F., Aránguiz-Acuña A., Palacios M., Muñoz-Muga P., Rucki M., Vítová M. | Latitudinal distribution of lanthanides contained in macroalgae in Chile: an inductively coupled plasma-mass spectrometric (ICP-MS) determination | Journal of Applied Phycology | Lanthanide compositions of 17 Chilean macroalgal specieswereanalyzedbyinductivelycoupledplasmamassspectrometry. Samples were collected from four distinct areas (from 23° to 53° S) along the coast of Chile, in the spring of 2014. Lanthanideswereconfirmedinallsamplesandwerefoundover a range of 0.0001–7.62 mg kg−1 dry weight, in agreement with concentrations found in non-polluted areas around the world. Ver PDF |
Sistema socio-ecológico | 2017 | Hasbún-Mancilla O., Aldunce-Ide P., Blanco-Wells G., Browne-Sartori R. | Framing climate change in Chile: discourse analysis in digital media | Convergencia, Revista de Ciencias Sociales | This article presents a discourse analysis of four digital media press in Chile with regard to mitigation and adaptation to climate change. The research, unprecedented for the Chilean case, is aimed at acknowledging the news framings by means of which climate change is communicated, since the media are the main source of information on climate change for decision makers and citizens. Ver PDF |
Adaptación de las especies | 2017 | Jacob B., Von Dassow P., Salisbury J., Navarro J., Vargas C. | Impact of low pH/high pCO2 on the physiological response and fatty acid content in diatom Skeletonema pseudocostatum | Journal of the Marine Biological Association of the United Kingdom | pCO2/pH perturbation experiments were carried out under two different pCO2 levels to evaluate effects of CO2-driven ocean acidification on semi-continuous cultures of the marine diatom Skeletonema pseudocostatum CSA48. Under higher pCO2/ lowered pH conditions, our results showed that CO2-driven acidification had no significant impact on growth rate, chlorophyll-a, cellular abundance, gross photosynthesis, dark respiration, particulate organic carbon and particulate organic nitrogenbetweenCO2-treatments,suggestingthatS.pseudocostatumisadaptedtotoleratechangesof~0.5unitsofpHunderhigh pCO2 conditions. Ver PDF |
Plancton | 2017 | Lagleraa L., Tovar-Sánchez A., Iversend M., González H., Naik H., Mangeshg G., Assmyh P., Klaas C., Mazzocchi M., Montresor M., Naqvig S., Smetacek V., Wolf-Gladrowi D. | Iron partitioning during LOHAFEX: Copepod grazing as a major driver for iron recycling in the Southern Ocean | Marine Chemistry | The LOHAFEX iron fertilization experiment was conducted for 39 days in the closed core of a cyclonic mesoscale eddy located along the Antarctic Polar Front in the Atlantic sector of the Southern Ocean. Mixed layer (ML) waters were characterized by high nitrate (~20μM), low dissolved iron (DFe ~0.2 nM) and low silicate concentrations (below 1μM) restricting diatom growth. Ver PDF |
Productividad marina | 2017 | Lara C., Saldías G., Westberry T., Behrenfeld M., Broitman B. | First assessment of MODIS satellite ocean color products (OC3 and nFLH) in the Inner Sea of Chiloé, northern Patagonia | Latin American Journal of Aquatic Research | The use of remote sensing has allowed enormous progress in our understanding of biophysical processes worldwide. Despite their importance, the use of satellite bio-optical products is still limited due to optical complexity. In this study we assess the performance of the Moderate Resolution Imaging Spectroradiometer algorithm for chlorophyll-a (MODIS-OC3) and of normalized Fluorescence Line Height (nFLH), in inner waters of northern Chilean Patagonia (41°-45ºS). Ver PDF |
Productividad marina | 2017 | Lee M., Torres R., Manríquez P. | The combined effects of ocean warming and acidification on shallow-water meiofaunal assemblages | Marine Environmental Research | Climate change due to increased anthropogenic CO2 in the atmosphere is causing an increase in seawater temperatures referred to as ocean warming and a decrease in seawater pH, referred to as ocean acidification. The meiofauna play an important role in the ecology of marine ecosystems and the functions they provide. Using microcosms, meiofaunal assemblages were exposed to two temperatures (15 and 19 °C) and two pHs (pCO2 of 400 and 1000 ppm), both individually and in combination, for a period of 90 days. Ver PDF |
Bentos | 2017 | López B., Tellier F., Retamal‑Alarcón J., Pérez‑Araneda K., Fierro A., Macaya E., Tala F., Thiel M. | Phylogeography of two intertidal seaweeds, Gelidium lingulatum and G. rex (Rhodophyta: Gelidiales), along the South East Pacific: patterns explained by rafting dispersal? | Marine Biology | Rafting on floating seaweeds facilitates dispersal of associated organisms, but there is little information on how rafting affects the genetic structure of epiphytic seaweeds. Previous studies indicate a high presence of seaweeds from the genus Gelidium attached to floating bull kelp Durvillaea antarctica (Chamisso) Hariot. Ver PDF |
Bentos | 2017 | López B., Macaya E., Tala F., Tellier F., Thiel M. | The variable routes of raftings: Stranding dinamics of floating bull kelp Durvillea Antarctica (Fucales, Phaeophyceae) on beaches in the se Pacific | Phycological Society of America | Dispersal on floating seaweeds depends on availability, viability, and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental Chile, which could be due to limitations in local supply and dispersal of floating kelps. Ver PDF |
Bentos | 2017 | López D., Camus P., Valdivia N., Estay S. | High temporal variability in the occurrence of consumer–resource interactions in ecological networks | Oikos | Ecological networks have been used to represent interactions between species as fixed linkages despite that populations naturally oscillate over time and space. As such, the influence of the persistence of linkages between species in communities has been overlooked. Unfortunately, empirical analysis of the temporal variation of trophic networks is constrained by the lack of data with high spatial, temporal and taxonomic resolution. Ver PDF |
Adaptación de las especies | 2017 | Martínez D., Oyarzún R., Pontigo J., Romero A., Yáñez A., Vargas-Chacoff L. | Nutritional Immunity Triggers the Modulation of Iron Metabolism Genes in the Sub-Antarctic Notothenioid Eleginops maclovinus in Response to Piscirickettsia salmonis | Frontiers in Immunology | Iron deprivation is a nutritional immunity mechanism through which fish can limit the amount of iron available to invading bacteria. The aim of this study was to evaluate the modulation of iron metabolism genes in the liver and brain of sub-Antarctic notothenioid Eleginops maclovinus challenged with Piscirickettsia salmonis. Ver PDF |
Adaptación de las especies | 2017 | Martínez D., Oyarzún R., Vargas-Lagos C., Pontigo J., Soto-Dávila M., Saravia J., Romero A., Núñez J., Yáñez A., Vargas-Chacoff L. | Identification, characterization and modulation of ferritin-H in the sub-Antarctic Notothenioid Eleginops maclovinus challenged with Piscirickettsia salmonis. | Developmental and Comparative Immunology | Ferritin is a major iron storage protein essential not only in the infectious process, but also in any circumstance generating oxidative stress. In this study, the cDNA coding sequence of ferritin-H was obtained from the sub-Antarctic Notothenioid fish Eleginops maclovinus through transcriptomic analysis of the head kidney. Ver PDF |
Productividad marina | 2017 | Mendesa R., Saldías G., De Castro M., Gómez-Gesteira M., Vaza N., Dias J. | Seasonal andinterannual variabilityofthe Douroturbid riverplume, northwestern IberianPeninsula | Remote Sensing of Environment | Received 17February2016 Received inrevisedform10March2017 Accepted5April2017 Availableonlinexxxx The Douro Riverrepresentsthemajorfreshwaterinput intothecoastaloceanofthenorthwesternIberianPeninsula.The seasonalandinterannualvariabilityofitsturbidplumeisinvestigatedusingoceancolorcomposites from MODIS (Moderate Resolution Imaging Spectroradiometer) sensor aboard the Aqua and Terra satellites (2000–2014) and long-term records of river discharge, wind and precipitation rate. Ver PDF |
Productividad marina | 2017 | Montero P., Daneri G., Tapia F., Iriarte JL., Crawford D. | Diatom blooms and primary production in a channel ecosystem of central Patagonia | Latin American Journal of Aquatic Research | Here we report on the seasonal productivity cycle at a fixed station in the Puyuhuapi Channel (44ºS, 73ºW), Chilean Patagonia. The analysis of in situ water column data and longer-term records of satellitederived surface ocean color (Chl-a) highlighted two contrasting seasons. Ver PDF |
Sistema socio-ecológico | 2017 | Nahuelhual L., Vergara X., Kusch A., Campos C., Droguett D. | Mapping ecosystem services for marine spatial planning: Recreation opportunities in Sub-Antarctic Chile | Marine Policy | The ecosystem services approach has increasingly emerged as a core requirement of ecosystem-based managementofthemarinespace.Inthiscontext,explicitquantificationandmappingofecosystemservicesisconsidered key. This research proposes a methodological framework that combines Geographic Information Systems and participatory techniques to map the ecosystem service of recreation opportunities, provided by coastal and marine ecosystems. Ver PDF |
Bentos | 2017 | Navarro N., Figueroa F., Korbee N. | Mycosporine-like amino acids vs carrageenan yield in Mazzaella laminarioides (Gigartinales; Rhodophyta) under high and low UV solar irradiance | International Phycological Society | The effects of increased solar photosynthetically active radiation (PAR) and ultraviolet radiation (UVR) on biomass, mycosporine-like amino acid (MAA) content, and carrageenan yield were studied for 14 days in tank-cultivated tetrasporophytes and gametophytes of Mazzaella laminarioides from the Magellan Strait. Ver PDF |
Productividad marina | 2017 | Mork Olsen L., Hernández K., Van Ardelan M., Iriarte J., Bizsel C.K., Olsen Y. | Responses in bacterial community structure to waste nutrients from aquaculture: an in situ microcosm experiment in a Chilean fjord | Aquacult Environ Interact | Chilean salmon farms release inorganic nutrients excreted by the fish into the surrounding water in Patagonian fjords. The objective of this experiment from the Comau Fjord (42.2° S) in southern Chile was to study how increased input of ammonium (NH4) and phosphate (PO4) from salmon farms might affect the community structure of bacteria in surface waters where fish farms are located.Ver PDF |
Bentos | 2017 | Ortiz M., Hermosillo-Nuñez B., González J., Rodríguez-Zaragoza F., Gómez I., Jordán F. | Quantifying keystone species complexes: Ecosystem-based conservation management in the King George Island (Antarctic Peninsula) | Ecological Indicators | A keystone species complex (KSC) is a small set of interacting species that play an outstandingly important role in community organization. TwoKSC indices aresuggested andhavebeencalculated inthe coastalbenthic/pelagic ecosystem of Fildes Bay, King George Island (Antarctica). Ver PDF |
Productividad marina y Adaptación de las especies | 2017 | Osores S., Lagos N., San Martín V., Manríquez P., Vargas R., Torres R., Navarro J., Poupin G., Saldías G., Lardies M. | Plasticity and inter-population variability in physiological and life-history traits of the mussel Mytilus chilensis: A reciprocal transplant experiment | Journal of Experimental Marine Biology and Ecology | Geographically widespread species must cope with environmental differences between habitats. Information concerning geographic variations in response to climate variability is critical because many morphological, life-history and physiological traits show variation across space. Ver PDF |
Bentos | 2017 | Pardo L., Ceroni C., Riveros M., Ernst B., Pino J. | Morphology of seminal receptacle of the harvested golden crab Chaceon chilensis and its implication in the fertilization process | Invertebrate Biology | The external and internal architecture of crab seminal receptacles are closely associated with mating behavior, sperm transfer, and storage patterns, and ultimately reproductive success. Therefore, describing their anatomy contributes to the development of a greater understanding of crab reproductive biology. Ver PDF |
Bentos | 2017 | Pardo L., Riveros M., Fuentes J., Pinochet R., Cárdenas C., Sainte-Marie B. | High fishing intensity reduces females’ sperm reserve and brood fecundity in a eubrachyuran crab subject to sex- and size-biased harvest | ICES Journal of Marine Science | Size-selective male fisheries may result in sperm limitation whereby the number of sperm is insufficient to fertilize all oo¨cytes produced by females. In eubrachyuran crabs, females have seminal receptacles for sperm storage which may reduce the risk of sperm limitation over their lifetime. Ver PDF |
Bentos | 2017 | Pérez-Matus A., Ospina-Álvarez A., Camus P., Carrasco S., Fernández M., Gelcich S., Godoy N., Ojeda P. Pardo L., Rozbaczylo, Subida M., Thiel M., Wieters E., Navarrete S. | Temperate rocky subtidal reef community reveals human impacts across the entire foodweb | Marine Ecology Progress Series | Table S1 presents the dataset included in our food web. The designation “taxa” corresponds to the core unit of analysis in the food web. The subtidal food web contains a total of 147 taxa, from which 133 were resolved to the following taxonomic categories: 3 phyla, 2 classes, 1 infraclass, 1 order, 18 genus, 103 species. The remaining taxa correspond to: i) species lumped by taxonomic and trophic relatedness (10 taxa containing lumped groups of amphipods, isopods and polychaetes), ii) resources lumped by ecological function (biofilm, plankton, detritus and human; the latter included in the node fisheries Ver PDF |
Productividad marina | 2017 | Pireda R., Sarno D., Lange C., Tomasino P., Zingone A., Montresor M. | Diatom resting stages in surface sediments: a pilot study comparing Next Generation Sequencing and Serial Dilution Cultures | Cryptogamie, Algologie | Several diatom species produce resting stages as part of their life cycle. These resting stages accumulate in the sediments where they can remain for a long time before eventually being re-suspended in the water column and switching to active growth. Until now, the abundance and diversity of viable diatom resting stages have been assessed using the Serial Dilution Culture (SDC) method. Ver PDF |
Bentos | 2017 | Pérez-Matus A., Ospina-Álvarez A., Camus P., Carrasco S., Fernández M., Gelcich S., Godoy N., Ojeda P., Pardo L., Rozbaczylo N., Subida M., Thiel M., Wieters E., Navarrete S. | Temperate rocky subtidal reef community reveals human impacts across the entire food web | Marine Ecology Progress Series | Food webs as representations of who eats whom are at the core of community ecology. Incorporation of tools from network theory enables assessment of how complex systems respond to natural and human-induced stressors, revealing how harvesting may degrade the properties and resilience of food webs. Ver PDF |
Bentos | 2017 | Rodríguez S., Valdivia N. | Mesoscale spatiotemporal variability in a complex host-parasite system influenced by intermediate host body size | Peer J | Parasites are essential components of natural communities, but the factors that generates kewed distributions of parasite occurrences and abundances across host populations are not well understood. Ver PDF |
Plancton | 2017 | Schneider W., Donoso D., Garcés-Vargas G., Escribano R. | Water-column cooling and sea surface salinity increase in the upwelling region off central-south Chile driven by a poleward displacement of the South Pacific High | Progress in Oceanography | Here we present results of direct observations of seawater temperature and salinity over the continental shelf off central-south Chile that shows an unprecedented cooling of the entire water column and an increase in upper layer salinity during 2002 to 2013. We provide evidence that this phenomenon is related to the intensification but mostly to a recent southward displacement of the South Pacific High over the same period, from 2007 on. Ver PDF |
Plancton | 2017 | Valdés., Fernández C., Molina V., Escribano R. | Nitrogen excretion by copepods and its effect on ammonia-oxidizing communities from a coastal upwelling zone | Limnology and Oceanography | The role of zooplankton in microbial nitrogen turnover in marine environments is poorly understood. Here, we present results from two experiments designed to determine the excretion rate of ammonium and dissolved organic nitrogen (DON) by dominant copepods, Acartia tonsa and Paracalanus cf indicus, fed with two natural sized-fractioned diets (20–150 lm and<20 lm), and its possible effects on the transcriptional activity of ammonia monooxygenase subunit A (amoA), a functional marker for ammonia-oxidizing archaea (AOA) and bacteria (AOB), as a response to the input of ammonium and DON by copepod excretion, during autumn and winter in central/southern Chile. Ver PDF |
Plancton | 2017 | Valdés V., Fernández C., Molina V., Escribano R., Joux F. | Dissolved Compounds Excreted by Copepods Reshape the Active Marine Bacterioplankton Community Composition | Frontiers in Marine Science | Copepods are important suppliers of bioreactive compounds for marine bacteria through fecal pellet production, sloppy feeding, and the excretion of dissolved compounds. However, the interaction between copepods and bacteria in the marine environment is poorly understood. Ver PDF |
Bentos | 2017 | Valdivia N., Segovia- Rivera V., Fica E., Bonta C., Aguilera M., Broitman B. | Context-dependentfunctionaldispersionacrosssimilarrangesoftraitspacecoveredbyintertidalrockyshorecommunities | Ecology and Evolution | Functional diversity is intimately linked with community assembly processes, but its large- scale patterns of variation are often not well understood. Here, we investigated the spatiotemporal changes in multiple trait dimensions (“trait space”) along vertical intertidal environmental stress gradients and across a landscape scale. Ver PDF |
Adaptación de las especies | 2017 | Vargas-Chacoff L., Muñoz J., Hawes C., Oyarzún R., Pontigo J., Saravia J., González M., Mardones O., Labbé B., Moreraf F., Bertrán C., Pino J., Wadsworthd S.,Yáñez A. | Ectoparasite Caligus rogercresseyi modifies the lactate response in Atlantic salmon (Salmo salar) and Coho salmon (Oncorhynchus kisutch) | Veterinary Parasitology | Although Caligus rogercresseyi negatively impacts Chilean salmon farming, the metabolic effects of infection by this sea louse have never been completely characterized. Therefore, this study analyzed lactate responses in the plasma, as wellas the liver/muscle lactate dehydrogenase(LDH) activity and geneexpression, in Salmosalar and Oncorhynchus kisutch infested by C. rogercresseyi. Ver PDF |
Bentos | 2017 | Véliz D., Duchesne P., Rojas-Hernández N., Pardo L. | Statistical power to detect multiple paternity in populations of highly fertile species: how many females and how many offspring should be sampled? | Behavioral Ecology and Sociobiology | One of the central issues of behavioral ecology focuses on the probability of detecting multiple paternity in a scenario of polygamy. The main problem for this kind of analysis arises in species with large number of offspring in the same litter and large population sizes in which only a small fraction of progeny and females can be analyzed. Here, we present a method to estimate the statistical power to detect multiple paternity for these species. Ver PDF |
Adaptación de las especies | 2017 | Vergara-Amado J., Silva., Manzia C. Nespolob R., Cárdenas L. | Differential expression of stress candidate genes for thermal tolerance in the sea urchin Loxechinus albus | Journal of Thermal Biology | Marine ectotherms inhabiting intertidal and shallow subtidal environments are continuously exposed to diurnal tidal cycles and seasonal variability in temperature. These organisms have adaptive mechanisms to maintain cellular homeostasis, irrespective of thermal environmental variation. In this study, we describe the molecular responses to thermal stress inthe edible sea urchinLoxechinus albus.Ver PDF |
Bentos | 2017 | Villaseñor-Parada C., Pauchard A., Macaya E. | Ecology of marine invasions in continental Chile: What do we know and we need to know? | Revista de Biología Marina y Oceanografía | The Chilean coast has fewer reports of introduced species for other shores worldwide, which could correspond to a natural phenomenon generated by oceanographic conditions, or an artifact caused by lack of available information. We analyzed 71 papers indexed in Web of Science related with ecology of marine invasions in the Chilean coast, published between 1998-2014, and we determined the current state of the discipline in Chile, and identified the trends (e.g., temporal, spatial, taxonomic) of the investigation. Ver PDF |
Plancton | 2016 | Anabalón V., Morales C., González, H., Menschel E., Schneider W., Hormazabal S., Valencia L., Escribano R. | Micro-phytoplankton community structure in the coastal upwelling zone off Concepción (central Chile): Annual and inter-annual fluctuations in a highly dynamic environment | Progress in Oceanography | An intensification of upwelling-favorable winds in recent decades has been detected in some of the main eastern boundary current systems, especially at higher latitudes, but the response of coastal phytoplankton communities in the Humboldt Current System (HCS) remains unknown. At higher latitudes in the HCS (35–40S), strong seasonality in wind-driven upwelling during spring-summer coincides with an annual increase in coastal chlorophyll-a and primary production, and a dominance of microphytoplankton. Ver PDF |
Bentos | 2016 | Andrade‑Villagrán P., Chaparro O., Pardo L., Paredes‑Molina F., Thompson R. | Embryo brooding and its effect on feeding in the bivalve Gaimardia bahamondei Osorio & Arnaud, 1984 | Helgol Mar Res | Gaimardia bahamondei is a small gonochoric bivalve which lives attached to subtidal algae. Females brood their embryos in the suprabranchial region of the pallial cavity, in close proximity to the gill filaments. We found no signifi‑ cant difference in clearance rate between males (non‑brooders) and females (brooders), regardless of the numbers of embryos in the brood, suggesting that the presence of embryos does not interfere with particle capture by the brooding female. Ver PDF |
Adaptación de las especies marinas Productividad marina | 2016 | Benítez S., Duarte C., López G., Manríquez P., Navarro J., Bonta C., Torres R., Quijón P. | Ontogenetic variability in the feeding behavior of a marine amphipod in response to ocean acidification | Marine Pollution Bulletin | Global stressors like ocean acidification (OA) are expected to influence the quality or palatibility of primary producers like algae. Ver PDF |
Adaptación de las especies marinas | 2016 | Bertrán C., Fierro P., Encalada E., Peña-Cortés F., Tapia J., Hauenstein E., Vargas-Chacoff L. | Macrobenthos of the coastal Budi Lagoon, southern Chile: Changes associated with seasonal environmental variation | Brazilian Journal of Oceanography | The purpose of the present study was to investigate the seasonal relationship of macrobenthos richness and abundance with sediment characteristics (i.e. texture and organic material) for the coastal Budi Lagoon in southern Chile. Physicochemical measurements and macrobenthos samples were taken over the course of a year at nine sampling stations. Ver PDF |
Bentos | 2016 | Cruces E., Rautenberger R., Rojas-Lillo Y., Cubillos V., Arancibia-Miranda N., Ramírez-Kushel E., Gómez I. | Physiological acclimation of Lessonia spicata to diurnal changing PAR and UV radiation: differential regulation among down- regulation of photochemistry, ROS scavenging activity and phlorotannins as major photoprotective mechanisms | Photosynth Res | Intertidal macroalgae are constantly subjected to high variations in the quality and quantity of incident irradiance that can eventually generate detrimental effect on the photosynthetic apparatus. The success of these organisms to colonize the stressful. Ver PDF |
Bentos | 2016 | Flores-Molina M., Rautenberger R., Muñoz P., Huovinen P., Gómez I. | Stress Tolerance of the Endemic Antarctic Brown Alga Desmarestia anceps to UV Radiation and Temperature is Mediated by High Concentrations of Phlorotannins | Photochemistry and Photobiology | The endemic Antarctic brown macroalga Desmarestia anceps is strongly shade-adapted, but shows also a high capacity to cope with different environmental stressors, e.g. UV radiation and temperature. Therefore, this species colonizes wide depth gradients, which are characterized by changing environmental conditions. Ver PDF |
Adaptación de las especies marinas | 2016 | Gaitán-Espitia J., Sánchez R., Bruning P., Cárdenas L. | Functional insights into the testis transcriptome of the edible sea urchin Loxechinus albus | Scientific RepoRts | The edible sea urchin Loxechinus albus (Molina, 1782) is a keystone species in the littoral benthic systems of the Pacific coast of South America. The international demand for high-quality gonads of this echinoderm has led to an extensive exploitation and decline of its natural populations. Ver PDF |
Plancton | 2016 | Giesecke R., Vallejos T., Sanchez M., Teiguiel K. | Plankton dynamics and zooplankton carcasses in a mid-latitude estuary and their contributions to the local particulate organic carbon pool | Continental Shelf Research | Estuaries are among the most productive aquatic ecosystems in coastal areas. Their productivity is linked to the formation of fronts generating mixing and retention of nutrients that can be used by autotrophs. Estuaries exhibit strong thermoclines and haloclines that may significantly affect zooplankton survival, while producing carcasses that could act as an alternative pathway of particulate organic carbon recycling. Ver PDF |
Bentos | 2016 | Gómez I., Español S., Véliz K., Huovinen P. | Spatial distribution of phlorotannins and its relationship with photosynthetic UV tolerance and allocation of storage carbohydrates in blades of the kelp Lessonia spicata | Mar Biol | The action of an intercalary meristem in the fronds determines the growth patterns of the sub-Antarctic kelp Lessonia spicata, which result in gradients in physiological activity and tissue composition. Ver PDF |
Plancton Productividad marina | 2016 | González H., Graeve M., Kattner G., Silva N., Castro L., Iriarte J., Osmán L., Daneri G., Vargas C. | Carbon flow through the pelagic food web in southern Chilean Patagonia: relevance of Euphausia vallentini as a key species | Marine Ecology Progress Series | The southernmost Patagonian region constitutes a major glaciered area with a high freshwater input loaded with particulate and dissolved matter. We assessed the relevance of the terrestrial (allochthonous) and marine (autochthonous) matter that permeates into the fjord and channel system and their possible impact on the euphausiid-based food web. Ver PDF |
Adaptación de las especies | 2016 | Hu Z-M., Guillemin M.L, | Coastal upwelling areas as safe havens during climate warming | Journal of Biogeography | Seaweeds have long been recognized as ‘ecosystem engineers’ and carbon sinks in coastal marine ecosystems. However, recent ocean warming has had drastic ecophysiological impacts on seaweed assemblages and hence coastal community structure (Wernberg et al., 2011, 2013). Ver PDF |
Bentos | 2016 | Huovinen P. Ramírez J., Gómez I. | Underwater Optics in Sub-Antarctic and Antarctic Coastal Ecosystems | Plos One | Understanding underwater optics in natural waters is essential in evaluating aquatic primary production and risk of UV exposure in aquatic habitats. Changing environmental conditions related with global climate change, which imply potential contrasting changes in underwater light climate further emphasize the need to gain insights into patterns related with underwater optics for more accurate future predictions. Ver PDF |
Productividad marina | 2016 | Iriarte J., León-Muñoz J., Marcé R., Clément A., Lara C. | Influence of seasonal freshwater streamflow regimes on phytoplankton blooms in a Patagonian fjord | New Zealand Journal of Marine and Freshwater Research | Ver PDF |
Sistemas socio-ecológicos | 2016 | Laterra P., Barral P., Carmona A., Nahuelhual L. | Focusing Conservation Efforts on Ecosystem Service Supply May Increase Vulnerability of Socio-Ecological Systems | Plos One | Growing concern about the loss of ecosystem services (ES) promotes their spatial representation as a key tool for the internalization of the ES framework into land use policies. Paradoxically, mapping approaches meant to inform policy decisions focus on the magnitude and spatial distribution of the biophysical supply of ES, largely ignoring the social mechanisms by which these services influence human wellbeing.Ver PDF |
Productividad marina | 2016 | Manríquez P., Jara M.,Seguel M., Torres R., Alarcón E., Lee M. | Ocean Acidification and Increased Temperature Have Both Positive and Negative Effects on Early Ontogenetic Traits of a Rocky Shore Keystone Predator Species | Plos One | The combined effect of ocean acidification and warming is expected to have significant effects on several traits of marine organisms. The gastropod Concholepas concholepas is a rocky shore keystone predator characteristic of the south-eastern Pacific coast of South America and an important natural resource exploited by small-scale artisanal fishermen along the coast of Chile and Peru. Ver PDF |
Plancton | 2016 | Menschel E., González H., Giesecke R. | Coastal-oceanic distribution gradient of coccolithophores and their role in the carbonate flux of the upwelling system off Concepción, Chile (36°S) | J. Plankton Res | The role of coccolithophores in the biogenic carbonate cycle was studied in the coastal upwelling zone off Concepción, Chile (36°S), and in adjacent oceanic waters during spring 2004. Coccolithophore abundance and diversity increased steadily from coastal to oceanic regions. Ver PDF |
Bentos | 2016 | Moreno-Pino M., De la Iglesia R., Valdivia N., Henríquez-Castilo C., Galán A., Diez B., Trefault N. | Variation in coastal Antarctic microbial community composition at sub-mesoscale: spatial distance or environmental ltering? | FEMS Microbiology Ecology | Spatial environmental heterogeneity infuences diversity of organisms at different scales. Environmental fltering suggests that local environmental conditions provide habitat-specifc scenarios for niche requirements, ultimately determining the composition of local communities. Ver PDF |
Sistema socio-ecológico | 2016 | Nahuelhual L., Benra F., Rojas F., Díaz I., Carmona A. | Mapping social values of ecosystem services: What is behind the map? | Ecology and Society | A growing interest in mapping the social value of ecosystem services (ES) is not yet methodologically aligned with what is actually being mapped. We critically examine aspects of the social value mapping process that might influence map outcomes and limit their practical use in decision making. Ver PDF |
Adaptación de la especies | 2016 | Navarro J., Labraña W., Chaparro O., Cisternas B., Ortiz A. | Physiological Constraints in Juvenile Ostrea chilensis Fed the Toxic Dinoflagellate Alexandrium catenella | Estuaries and Coasts | Frequent blooms of the dinoflagellate Alexandrium catenella in southern Chile encouraged undertaking the present study which uses the oyster Ostrea chilensis as a model for evaluating the feeding, growth, lipid storage and mortality responses to diets containing paralytic shellfish poisoning (PSP) produced by A. catenella. M. Ver PDF |
Adaptación de la especies Productividad marina | 2016 | Navarro J., Duarte C., Manríquez P., Lardies M., Torres R., Acuña K., Vargas C., Lagos N. | Ocean warming and elevated carbon dioxide: multiple stressor impacts on juvenile mussels from southern Chile | ICES Journal of Marine Science | The combined effect of increased ocean warming and elevated carbon dioxide in seawater is expected to have significant physiological and ecological consequences at many organizational levels of the marine ecosystem. In the present study, juvenile mussels Mytilus chilensis were reared for 80 d in a factorial combination of two temperatures (12 and 168C) and three pCO2 levels (380, 700, and 1000 matm). Ver PDF |
Bentos | 2016 | Navarro N., Huovinen P., Gómez I. | Stress tolerance of Antarctic macroalgae in the early life stages | Revista Chilena de Historia Natural | Early life stages of macroalgae, especially from polar species, can be highly vulnerable to physical stressors, leading to important consequences for the fate of the whole population in scenarios of changing environmental variability. Ver PDF |
Bentos | 2016 | Navedo J., Fernández G., Valdivia N., Drever M., Masero J. | Identifying management actions to increase foraging opportunities for shorebirds at semi-intensive shrimp farms | Journal of Applied Ecology | Land-use change is a driver of biodiversity loss (Newbold et al. 2015). The development and implementation of measures to increase the suitability of existing modified habitats for wildlife appears essential to conserve biodiversity. Ver PDF |
Bentos | 2016 | Oyarzún P., Toro J., Garcés-Vargas J., Alvarado C., Guiñez R., Jaramillo R., Briones C., Campos B. | Reproductive patterns of mussel Perumytilus purpuratus (Bivalvia: Mytilidae), along the Chilean coast: effects caused by climate change? | Marine Biological Association of the United Kingdom | Reproductive cycles were studied in seven natural populations of the intertidal bivalve Perumytilus purpuratus, distributed in a latitudinal gradient of 2400 km along the Chilean Pacific coast (20 –408S). The results, both qualitative (gametogenic stages) and quantitative (GSI and GVF), over a period of 24 months, showed that these populations presented asynchrony in the reproductive cycle. Ver PDF |
Plancton | 2016 | Pavés H., Schlatter H., Fanco-Trecu V., Páez E., Sielfeld W., Araos V., Giesecke R., Batallés L., Cappozzo L. | Breeding season of the South American fur seal (Arctocephalus australis, Otariidae: Carnivora): New data for establishing independent evolutionary histories? | Revista de Biología Marina y Oceanografía | The South American fur seal (SAFS) is distributed from Peru (Pacific Ocean) to Uruguay (Atlantic Ocean). However, there is a section of coastline of about 2,300 km along the Chilean coast where no SAFS are recorded. Based on morphological comparisons 3 geographic forms have been reported (Peruvian, South Chilean, Atlantic), whereas preliminary genetic studies suggest the presence of 3 distinct genetic types (Peruvian, South Chile, Atlantic). Ver PDF |
Bentos | 2016 | Peters-Didier J., Pardo L., Garrido O., Gallardo C. | Reproductive biology of the commercial sea cucumber Athyonidium chilensis (Holothuroidea: Dendrochirotida) in southern Chile | Marine Biological Association of the United Kingdom, | Reproductive aspects of the sea cucumber Athyonidium chilensis were studied over a year in Valdivia, Chile, through gonad index (GI) analysis, macro- and microscopic analysis of the gonads, fecundity and size at first sexual maturity estimations. We also explored the reliability of live size estimators for their use in fisheries. Ver PDF |
Plancton | 2016 | Piñones A., Fedorov A. | Projected changes of Antarctic krill habitat by the end of the 21st century | Geophys. Res. Lett. | Climate change is rapidly shaping the living environment of the most abundant keystone species of the Antarctic marine food web, Antarctic krill. Projected future changes for the krill habitat include a sustained increase in ocean temperature and changes in sea ice and chlorophylla. Ver PDF |
Adaptación de las especies | 2016 | Pontigo J., Agüero M., Sánchez P., Oyarzún R., Vargas-Lagos C., Mancilla J., Kossmanng H., Morerah F., Yáñez A., Vargas-Chacoff L. | Identification and expressional analysis of NLRC5 inflammasome gene in smolting Atlantic salmon (Salmo salar) | Fish & Shellfish Immunology | The NOD-like receptors (NLRs) were recently identified as an intracellular pathogen recognition receptor family in vertebrates. While the immune system participation of NLRs has been characterized and analyzed in various mammalian models, few studies have considered NLRs in teleost species.Ver PDF |
Bentos | 2016 | Rivas, C., Navarro C., Huovinen P., Gómez I. | Photosynthetic UV stress tolerance of the Antarctic snow alga Chlorella sp. Modified by enhanced temperature? | Revista Chilena de Historia Natural | Photosynthetic characteristics and the effect of UV radiation and elevated temperature measured were studied in Chlorella sp. isolated from a snow microalgal community at King George Island, Maritime Antarctica through the chlorophyll florescence (rapid light curves and maximum quantum yield, respectively). Ver PDF |
Plancton | 2016 | Robertson G., Wienecke B., Suazo C., Lawton K., Arata J., Moreno C. | Continued increase in the number of black-browed albatrosses (Thalassarche melanophris) at Diego Ramírez, Chile. | Polar Biol | Black-browed albatrosses (Thalassarche melanophris) are killed incidentally in commercial fishing operations. Aerial surveys in 2002 and 2011 revealed the number of black-browed albatrosses at the Diego Ramı´rez and Ildefonso islands, Chile, increased by 52 and 18 %, respectively. Ver PDF |
Bentos | 2016 | Rodríguez S., D’Elía G., Valdivia N. | The phylogeny and life cycle of two species of Profilicollis (Acanthocephala: Polymorphidae) in marine hosts off the Pacific coast of Chile. | Journal of Helminthology | Resolving complex life cycles of parasites is a major goal of parasitological research. The aim of this study was to analyse the life cycle of two species of the genus Profilicollis, the taxonomy of which is still unstable and life cycles unclear. Ver PDF |
Adaptación de las especies | 2016 | Ruiz-Jarabo I., González-Wevar C., Oyarzún R., Fuentes J., Poulin E., Bertrán C., Vargas-Chacoff L. | Isolation Driven Divergence in Osmoregulation in Galaxias maculatus (Jenyns, 1848) (Actinopterygii: Osmeriformes) | Plos One | Marine species have colonized extreme environments during evolution such as freshwater habitats. The amphidromous teleost fish, Galaxias maculatus is found mainly migrating between estuaries and rivers, but some landlocked populations have been described in lakes formed during the last deglaciation process in the Andes. Ver PDF |
Bentos | 2016 | Salvador-Soler N., Macaya E., Rull-Lluch D., Gómez-Garreta A. | Nuclear DNA content in Gelidium chilense (Gelidiales, Rhodophyta) from the Chilean coast | Revista de Biología Marina y Oceanografía | There has been progress in novel additions of algal data to the Plant DNA C-values database during recent years; however more information is still required. Specifically, in the case of red algae (Rhodophyta), from ~7000 species described up to date, DNA C-values for only 196 species have been incorporated (~3%). Ver PDF |
Productividad marina | 2016 | Schimmelmann A., Lange C., Schieber J., Francusc P., Ojala A.K.E., Zolitschkae B. | Varves in marine sediments: A review | Earth-Science Reviews | The global compilation of reported marine varved sedimentary records throughout the Quaternary contains 52 sites. Marine varve deposition and preservation typically depend on environmental and sedimentological conditions, such as a sufficiently high sedimentation rate, severe depletion of dissolved oxygen in bottom water to exclude bioturbation by macrobenthos, and a seasonally varying sedimentary input to yield a recognizable rhythmic varve pattern.Ver PDF |
Bentos | 2016 | Segovia-Rivera V., Valdivia N. | Independent effects of grazing and tide pool habitats on the early colonisation of an intertidal community on western Antarctic Peninsula. | Revista Chilena de Historia Natural | Prevailing environmental conditions can modulate the structuring role of biotic interactions. In intertidal habitats, less stressful environmental conditions and/or higher grazer densities may allow grazing effects to be stronger in tide pools than on emergent rocks. Ver PDF |
Bentos | 2016 | Sepúlveda R., Valdivia N. | Macrobenthic Community Changes of Intertidal Sandy Shores after a Mega-Disturbance | Estuaries and Coasts | Large-scale events of destruction and mortality trigger abrupt changes in the structure of natural communities. Testing the magnitude of such effects and the resilience of the impacted communities is difficult, however, because large-scale disturbances are generally unpredictable and thus available data are rare. Ver PDF |
Bentos | 2016 | Sepúlveda R., Valdivia N. | Localised Effects of a Mega-Disturbance: Spatiotemporal Responses of Intertidal Sandy Shore Communities to the 2010 Chilean Earthquake | Plos One | Determining the effects of unpredictable disturbances on dynamic ecological systems is challenged by the paucity of appropriate temporal and spatial coverage of data. On 27 February 2010, an 8.8 Mw mega-earthquake and tsunami struck central Chile and caused coastal land-level changes, massive damage to coastal infrastructure, and widespread mortality of coastal organisms. Ver PDF |
Bentos | 2016 | Talaa F. Velásquez M., Mansilla A., Macaya E., Thiela M. | Latitudinal and seasonal effects on short-term acclimation of floating kelp species from the South-East Pacific | Journal of Experimental Marine Biology and Ecology | Floating seaweeds are important dispersal vehicles for many organisms in cold-temperate waters between latitudes 30° and 60°. Molecular studies suggested that long-distance rafting of seaweeds is more prevalent at the polar edges of their distribution but knowledge about their physiological status at high latitudes is limited. Ver PDF |
Bentos | 2016 | Tejada-Martinez D., López D., Bonta C., Sepúlveda R., Valdivia N. | Positive and negative effects of mesograzers on early- colonizing species in an intertidal rocky-shore community | Ecology and Evolution | The ecological consequences of human-driven overexploitation and loss of keystone consumers are still unclear. In intertidal rocky shores over the world, the decrease of keystone macrograzers has resulted in an increase in the dominance of herbivores with smaller body (i.e., “mesograzers”), which could potentially alter community assembly and structure. Ver PDF |
Adaptación de las especies | 2016 | Vargas-Chacoff L., Muñoz J., Hawes C., Oyarzún R., Pontigo J., Saravia J., González M., Morera F., Labbé B., Bertrán C., Mardones O., Pino J., Wadsworth S. | Atlantic salmon (Salmo salar) and Coho salmon (Oncorhynchus kisutch) display differential metabolic changes in response to infestation by the ectoparasite Caligus rogercresseyi | Aquaculture | Caligus rogercresseyi sea lice negatively impact Chilean salmonid farming, but no complete characterization for the metabolic effects of Caligus infestation currently exists. Therefore, the aim of this study was to analyze the effects of C. rogercresseyi infestation on the metabolic responses of Salmo salar and Oncorhynchus kisutch. Ver PDF |
Adaptación de las especies | 2016 | Vargas-Chacoff L., Moneva F., Oyarzún R., Martínez D., Saavedra E., Ruiz-Jarabo I., Muñoz J.L.P., Bertrán C., Mancera J.M. | Metabolic responses to salinity changes in the subantarctic notothenioid teleost Eleginops maclovinus | Polar Biol | Eleginops maclovinus is an endemic, subantarctic Notothenioidei species. This study examined the influence of different environmental salinities (5, 15, and 45 psu; and 32 psu as a control) on energy metabolism in E. maclovinus over a period of 14 days. Ver PDF |
Adaptación de las especies | 2016 | Villanueva P., Navarro J. | Pre-ingestive selection e ciency in two populations of the razor clam Tagelus dombeii with di erent histories of exposure to paralytic shell sh poisoning (PSP) | Marine and Freshwater Behaviour and Physiology | We studied toxic effects of the dinoflagellate Alexandrium catenella on filtration activity and pre-ingestive selection efficiency in Tagelus dombeii (razor clam). Ver PDF |
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