29 documents found, page 1 of 3
Ervilia castanea (Mollusca, Bivalvia) populations adversely affected at CO₂ see...
Martins, Marta; Silva, Marina Carreiro; Martins, Gustavo M.; Ramos, Joana B.; Viveiros, Fátima; Couto, Ruben P.; Parra, Hugo; Monteiro, JoãoSites with naturally high CO₂ conditions provide unique opportunities to forecast the vulnerability of coastal ecosystems to ocean acidification, by studying the biological responses and potential adaptations to this increased environmental variability. In this study, we investigated the bivalve Ervilia castanea in coastal sandy sediments at reference sites and at volcanic CO₂ seeps off the Azores, where the pH...
Food web structure of three Mediterranean stream reaches along a gradient of an...
Sroczynska, Katarzyna; Williamson, Tanner; Claro, Marilia; Gonzalez-Perez, Jose Antonio; Range, Pedro; Boski, Tomasz; Chicharo, LuisAnthropogenic impact can alter food web structure through changes in species interactions. In this study, we explored the food web of three Mediterranean stream reaches (two seasonal and one permanent) along an anthropogenic impact gradient to test the hypothesis that increasing impact simplifies food webs. To test this, we applied the isotopic (δ13C and δ15N) niche concept to compare reaches using isotopic met...
Ervilia castanea (Mollusca, Bivalvia) populations adversely affected at CO2 see...
Martins, Marta; Carreiro-Silva, Marina; Martins, Gustavo M.; Barcelos e Ramos, Joana; Viveiros, Fátima; Couto, Ruben P.; Parra, Hugo; Monteiro, JoãoSites with naturally high CO2 conditions provide unique opportunities to forecast the vulnerability of coastal ecosystems to ocean acidification, by studying the biological responses and potential adaptations to this increased environmental variability. In this study, we investigated the bivalve Ervilia castanea in coastal sandy sediments at reference sites and at volcanic CO2 seeps off the Azores, where the pH...
Fish communities and environmental variables during dry season in Pampanga estu...
Abroguena, Jeff Bogart R.; Range, Pedro; Cruz, Wilfredo; Tentia-Lagumen, Mary Chris; Chicharo, LuisBaseline assessment of fish communities and selected environmental variables (salinity, water temperature, water transparency, current speed, total suspended solid, chlorophyll a) was conducted in Pampanga estuary (Philippines) during a specific dry season (April 2010). The aims were: (a) to examine the variations of fish diversity and community structure, in relation to neap and spring tides and estuary zones ...
Ocean acidification impacts on zooplankton
Campoy, Ana N.; Cruz, Joana; Ramos, Joana Barcelos e; Viveiros, Fátima; Range, Pedro; Teodosio, M AGlobal change is and will continue impacting biodiversity, as many studies have already documented. Rising atmospheric CO2 is alleviated by oceanic uptake, since atmosphere and surface ocean exchange CO2 , but it also modifies the ocean carbonate system towards decreased carbonate ion concentrations and a corresponding decline in seawater pH. This process is known as ocean acidification (OA) and has a direct ef...
Are submarine groundwater discharges affecting the structure and physiological ...
Piló, David; Barbosa, Ana B.; Teodosio, Maria; Encarnação, J.; Miguel de Sousa Leitão, Francisco; Range, Pedro; Krug, Lilian; Cruz, J.; Chícharo, LuísThis study evaluated the impacts of submarine groundwater discharges (SGD) on a rocky intertidal community of South Portugal, during April-November 2011. Chlorophyll-a concentration was higher at the SGD site in respect to the Reference site. Epibenthic community structure differed between sites, with an increase in Chthamalus spp. and a decrease in macroalgae coverage at the SGD site. The abundance and body si...
Habitat-specific benthic metabolism in a Mediterranean-type intermittent stream
Sroczynska, Katarzyna; Claro, Marilia; Range, Pedro; Wasiak, Katarzyna; Wojtal-Frankiewicz, Adrianna; Ben-Hamadou, Radhouan; Leitão, FranciscoA modified flow-through chamber method was used to measure gross primary production (GPP), net primary production (NPP), community respiration (CR) and associated environmental variables in an intermittent Mediterranean-type stream in Southern Portugal. Three common types of in stream habitats were targeted: cobble (C), cobble covered with filamentous algae (C+A) and leaf litter (LL). NPP, GPP and CR differed s...
Larval hatching and development of the wedge shell (Donax trunculus L.) under i...
Pereira, Alexandre Miguel; Range, Pedro; Campoy, Ana; Oliveira, Ana Paula; Joaquim, Sandra; Matias, Domitília; Chícharo, Luís; Gaspar, MiguelNoticeable changes in global temperatures, climate and ocean carbon chemistry are the result of carbon dioxide increase in the atmosphere. This increase has been mitigated by the oceans capacity to absorb one-fourth of the carbon dioxide in the atmosphere, although this CO2 intake affects oceans carbonate chemistry [i.e., ocean acidification-(OA)]. The detrimental effect of OA in the development and shell forma...
Influence of environmental variables and fishing pressure on bivalve fisheries ...
Vânia, Baptista; Ullah, Hadayet; Teixeira, Célia M.; Range, Pedro; Erzini, Karim; Leitão, FranciscoClimate changes affect marine ecosystems and the survival, growth, reproduction and distribution of species, including those targeted by commercial fisheries. The impact of climate change has been reported for many fish species, but studies focusing on the effects of climate on bivalve resources are lacking. In Portugal, the harvesting of bivalves is an old and artisanal activity, of special importance along th...
Impacts of CO2-induced seawater acidification on coastal Mediterranean bivalves...
Range, Pedro; Chicharo, Maria Alexandra Teodosio; Ben-Hamadou, Radhouan; Piló, David; Fernandez-Reiriz, M. J.; Labarta, U.; Marin, María GabriellaThe effects of seawater acidification caused by increasing concentrations of atmospheric carbon dioxide (CO2), combined with other climatic stressors, were studied on 3 coastal Mediterranean bivalve species: the mussel Mytilus galloprovincialis and the clams Chamelea gallina and Ruditapes decussatus. CO2 perturbation experiments produced contrasting responses on growth and calcification of juvenile shells, acco...