Rodrigo Torres

Rodrigo Torres
Centro de Investigación en Ecosistemas de la Patagonia | CIEP

Ph.D

About

78
Publications
22,792
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4,125
Citations
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June 2008 - present

Publications

Publications (78)
Article
Full-text available
The biogeochemical dynamics of fjords in the southeastern Pacific Ocean are strongly influenced by hydrological and oceanographic processes occurring at a seasonal scale. In this study, we describe the role of hydrographic forcing on the seasonal variability of the carbonate system of the Sub-Antarctic glacial fjord, Seno Ballena, in the Strait of...
Article
Full-text available
Coccolithophores are potentially affected by ongoing ocean acidification, where rising CO2 lowers seawater pH and calcite saturation state (Ωcal). Southern Patagonian fjords and channels provide natural laboratories for studying these issues due to high variability in physical and chemical conditions. We surveyed coccolithophore assemblages in Pata...
Chapter
Full-text available
RESUMEN Este capítulo presenta una evaluación del estado de la química del agua superficial y subterránea de las turberas de Sphagnum en la región de Aysén, junto con un análisis espacial y estacional de la turbera Pedro Aguirre Cerda (PAC). Se observaron fuertes patrones estacionales de oxígeno disuelto, pH e iones principales en aguas subterránea...
Article
Understanding the impact of increases in pCO2 (OA) and extreme changes in temperature on marine organisms is critical to predicting how they will cope with climate change. We evaluated the effects of OA as well as warming and cooling trend temperature on early reproductive traits of Lessonia trabeculata, a bio-engineer kelp species. Sori discs were...
Article
Full-text available
Vargas and collaborators (Vargas et al., 2018), therein V2018, reported measurements of pH, total alkalinity (AT), dissolved inorganic carbon (CT), dissolved oxygen (DO) and other hydrographic variables along a portion of the Strait of Magellan and associated fjords during the spring of 2010. Using the measured values of AT and pH to calculate the...
Article
Full-text available
Following the eruption of the Calbuco volcano in April 2015, an extensive ash plume spread across northern Patagonia and into the southeast Pacific and southwest Atlantic oceans. Here, we report on field surveys conducted in the coastal region receiving the highest ash load following the eruption (Reloncaví Fjord). The fortuitous location of a long...
Article
Full-text available
Biogeochemical processes in fjords are likely affected by changes in surrounding glacier cover but very little is known about how meltwater directly influences dissolved organic matter (DOM) in fjords. Moreover, the data available are restricted to a handful of northern hemisphere sites. Here we analyze seasonal and spatial variation in dissolved o...
Article
Full-text available
The capacity of marine organisms to adapt and/or acclimate to climate change might differ among distinct populations, depending on their local environmental history and phenotypic plasticity. Kelp forests create some of the most productive habitats in the world, but globally, many populations have been negatively impacted by multiple anthropogenic...
Preprint
Full-text available
Coccolithophores are potentially affected by ongoing ocean acidification, where rising CO2 lowers seawater pH and calcite saturation state (Ωcal). Southern Patagonian fjords and channels provide natural laboratories for studying these issues 15 due to high variability in physical and chemical conditions. We surveyed coccolithophore assemblages in P...
Preprint
Full-text available
Following the April 2015 eruption of the Calbuco volcano, an extensive ash plume spread across northern Patagonia and into the SE Pacific and SW Atlantic Ocean. Here we report the results of field surveys conducted in the marine region receiving the highest ash load following the eruption (Reloncaví Fjord). The fortuitous location of a long-term mo...
Article
Full-text available
Estuaries are characterized by high fluctuation of their environmental conditions. Environmental parameters measured show that the seawater properties of the Quempillén estuary (i.e. temperature, salinity, pCO2, pH and ΩCaCO3) were highly fluctuating and related with season and tide. We test the effects of increasing temperature and pCO2 in the sea...
Article
Full-text available
Changes may be occurring in the carbonate chemistry of fjords due to natural and anthropogenic disturbance of major freshwater sources. We present a high‐frequency time series study of seasonal pH and CO2 partial pressure (pCO2) in a north Patagonian fjord with a focus on changes in freshwater inflows and biological processes. To do this, we monito...
Article
To make robust projectios of the impacts of climate change, it is critical to understand how abiotic factors may interact to constrain the distribution and productivity of marine flora and fauna. We evaluated the effects of projected end of the century ocean acidification (OA) and warming (OW) on the thermal tolerance of an important living marine...
Article
The effects of ocean warming and ocean acidification on developmental and reproductive traits of Lessonia trabeculata were evaluated. Meiospores were cultured for 35 days in an experimental mesocosm where temperature (~15 and 19 °C) and partial CO2 pressure (pCO2, ~400 and 1300 μatm) were controlled. The results indicate that germination was reduce...
Article
High latitudes are considered particularly vulnerable to ocean acidification, since they are naturally low in carbonate ions. The edible mussel Mytilus chilensis is a common calcifier inhabiting marine ecosystems of the southern Chile, where culturing of this species is concentrated and where algal blooms produced by the toxic dinoflagellate A. cat...
Technical Report
Full-text available
This is a scientific report solicited by the Dirección General del Territorio Marítimo y de Marina Mercante (DIRECTEMAR) of the Chilean Navy in June 2017. A foreign (Canadian) company had been making numerous appearances in the Chilean and International Press, and conducting an advertising campaign, to promote the commercial fertilization of Chilea...
Article
Full-text available
Harmful Algal Blooms (HAB), are natural phenomena that are produced by the proliferation of phytoplankton potentially harmful to humans and for some ecosystem services (e.g., good water quality for use in aquaculture, availability of natural resources). In Chile, HAB events of Pseudo-nitzschia spp. and Alexandrium catenella are particularly relevan...
Presentation
Los estuarios se caracterizan por ser sistemas dinámicos, influenciados directamente por las mareas y el efecto sinérgico de las variables ambientales, lo que tiene consecuencias sobre el crecimiento y reproducción de los organismos que los habitan. Estos sistemas son altamente sensibles a condiciones del cambio climático. El estuario de Quempillen...
Poster
Se evaluó el impacto de la exposición a temperaturas y niveles de CO2 asociados a escenarios futuros de cambio climático en los procesos fisiológicos de individuos juveniles de Ostrea chilensis durante un periodo de 60 días. Los ejemplares de Ostrea chilensis fueros recolectados desde una zona de cultivo ubicada en el estuario del Río Quempillén pa...
Article
Full-text available
Marine multicellular organisms inhabiting waters with natural high fluctuations in pH appear more tolerant to acidification than conspecifics occurring in nearby stable wa- ters, suggesting that environments of fluctuating pH hold ge- netic reservoirs for adaptation of key groups to ocean acid- ification (OA). The abundant and cosmopolitan calcifyi...
Conference Paper
Full-text available
Domoic acid (DA) is one of the toxins monitored in the Magellan region (48° - 55° S) by LC-DAD since 1997, at levels ranging between non-detectable and trace. However, in November 2015, DA levels up to 20 μg g-1 were detected in ribbed mussels (Aulacomya atra) at a monitoring station in Ringdove estuary, (49°46’ S, 74°19’ W). A fortnight after this...
Article
Full-text available
Marine multicellular organisms inhabiting waters with natural high fluctuations in pH appear more tolerant to acidification than conspecifics occurring in nearby stable waters, suggesting that environments of fluctuating pH hold genetic reservoirs for adaptation of key groups to ocean acidification (OA). The abundant and cosmopolitan calcifying phy...
Poster
Ostrea chilensis es un bivalvo de alto interés comercial, que es extraído desde bancos naturales o cultivos a pequeña escala en el sur de Chile. Una de las principales poblaciones habita el estuario Quempillen, Chiloé, (41° 52`S; 73° 46`W), la que está expuesta a una alta variabilidad ambiental, como temperatura, salinidad, pH, clorofila a y seston...
Article
Recent work has shown that the behaviour of marine organisms can be affected by elevated 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 characteri...
Article
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. Reciprocal transplant experiments have shown to be relevant to evaluat...
Article
Full-text available
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 of their particular environmental context and genetic backgrou...
Poster
Full-text available
Through the analysis of information gathered from various sources (expeditions) from the western Patagonia (50-54ºS), southern Chile, we report the current status of harmful microalgae and marine toxins, in a sub Antarctic area with few anthropogenic influences like aquaculture but highly mediated by global change (e.g. glaciers melting and freshen...
Presentation
Full-text available
The changes in the environment caused by an increase in atmospheric CO2 could potentially change the the structure of benthic marine communities, of which meiofauna are an important component. The objective of this research was to determine the impact of future levels of temperature and acidification on the meiofaunal communities found in the shall...
Article
Full-text available
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 fisherm...
Article
Full-text available
The effects of global stressors on a species may be mediated by the stressors' impact on coexisting taxa. For instance, herbivore-algae interactions may change due to alterations in algal nutritional quality resulting from high CO2 levels associated with ocean acidification (OA). We approached this issue by assessing the indirect effects of OA on t...
Article
Full-text available
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 1...
Article
Recently reported blooms of Didymosphenia geminata from rivers in Argentinean and Chilean Patagonia, together with non-typical blooms reported from lake systems, have the potential to alter community and ecosystem dynamics of aquatic environments in the region. In an effort to quantify key aspects of ecosystem function of D. geminata mats in Patago...
Article
The sea urchin Loxechinus albus is a benthic shallow water coastal herbivore and an exploited natural resource. This study evaluated the consequences of projected near-future ocean acidification (OA) and warming (OW) for small juveniles of this species. Individuals were exposed for 7 mo to contrasting pCO2 (∼400 and 1200 μatm) and temperature (∼16...
Article
Full-text available
Se realizaron mediciones de temperatura, salinidad, alcalinidad total y carbono inorgánico disuelto del agua de mar superficial dentro de un área dedicada a la producción de semillas de mitílidos en el Seno de Reloncaví, Patagonia norte, durante el otoño (mayo 2012) y el verano austral (enero 2013). Se determinó que el estado de saturación del carb...
Article
Full-text available
Larval stages represent a bottleneck influencing the persistence of marine populations with complex life cycles. Concholepas concholepas is a gastropod species that sustains the most important small-scale artisanal fisheries of the Chile-Peru Humboldt Coastal current system. In this study, newly-laid egg capsules of C. concholepas collected from 3...
Poster
Full-text available
This poster shows 4 years (2010 - 2014) of research associated with diatom Didymosphenia geminata in the inland water systems of the island of Tierra del Fuego, Chile.
Article
Full-text available
Ocean acidification (OA) has been shown to affect significantly the net calcification process and growth rate of many marine calcifying organisms. Recent studies have shown that the responses of these organisms to OA can vary significantly among species. However, much less is known concerning the intraspecific variability in response to OA. In this...
Article
Phenotypic adaptation to environmental fluctuations frequently occurs by preexisting plasticity and its role as a major component of variation in physiological diversity is being widely recognized. Few studies have considered the change in phenotypic flexibility among geographic populations in marine calcifiers to ocean acidification projections, d...
Article
Full-text available
In a series of laboratory Y-maze experiments, we investigated the directional response of juveniles of the muricid snail Concholepas concholepas, a rocky-shore keystone predator characteristic of the southeastern Pacific coast, in displaying prey detection and predator escape behaviour after 5 mo rearing under contrasting levels of pCO2: 390 (prese...
Article
Anthropogenic CO2 emissions have led to increasing global mean temperatures (a process called global warming) and ocean acidification. Because both processes are occurring simultaneously, to better understand their consequences on marine species their combined effects must be experimentally evaluated. The aim of this study was to evaluate for the f...
Article
The diatom Didymosphenia geminata has emerged as a major global concern, as both an aggressive invader of rivers and streams in the southern hemisphere, and for its ability to form nuisance blooms in oligotrophic systems in its native range. South American D. geminata blooms were first documented in Chilean Patagonia in May 2010, and have spread to...
Article
We present experimental data obtained with newly hatched veliger larvae of the gastropod Concholepas concholepas and juveniles of the mussel Perumytilus purpuratus exposed to three pCO2 levels. Egg capsules of C. concholepas were collected from three geographic locations in northern (Antofagasta), central (Las Cruces), and southern Chile (Calfuco),...
Article
Full-text available
The assessment of the effects of Ocean Acidifi cation (OA) on marine life has received increasing attention in recent marine research. On a mesocosmic scale, the CO2 levels in seawater can be manipulated to evaluate experimentally the consequences of OA on marine organisms (vertebrates and invertebrates). An ideal manipulation of carbonate chemis...
Article
Full-text available
Most research on Ocean Acidification (OA) has largely focused on the process of calcification and the physiological trade-offs employed by calcifying organisms to support the building of calcium carbonate structures. However, there is growing evidence that OA can also impact upon other key biological processes such as survival, growth and behaviour...
Article
Full-text available
The assessment of the effects of Ocean Acidifi cation (OA) on marine life has received increasing attention in recent marine research. On a mesocosmic scale, the CO2 levels in seawater can be manipulated to evaluate experimentally the consequences of OA on marine organisms (vertebrates and invertebrates). An ideal manipulation of carbonate chemistry...
Article
Full-text available
Changes in phenotypic traits, such as mollusc shells, are indicative of variations in selective pressure along environmental gradients. Recently, increased sea surface temperature (SST) and ocean acidification (OA) due to increased levels of carbon dioxide in the seawater have been described as selective agents that may affect the biological proces...
Article
This study evaluated the impact of medium-term exposure to elevated pCO2 levels (750–1200 ppm) on the physiological processes of juvenile Mytilus chilensis mussels over a period of 70 d in a mesocosm system. Three equilibration tanks filled with filtered seawater were adjusted to three pCO2 levels: !380 (control), !750 and !1200 ppm by bubbling air...
Data
This study evaluated the impact of medium-term exposure to elevated pCO2 levels (750-1200 ppm) on the physiological processes of juvenile Mytilus chilensis mussels over a period of 70 d in a mesocosm system. Three equilibration tanks filled with filtered seawater were adjusted to three pCO2 levels: 380 (control), 750 and 1200 ppm by bubbling air or...