20 documents found, page 1 of 2
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...
Metals from human activities in a coastal Lagoon Saltmarsh - Sediment toxicity ...
Silva, Manuela; Aníbal, Jaime; Duarte, D. N.; Veloso, N.; Patrício, F.; Chicharo, LuisAnthropogenic pressure on coastal areas has been increasing in the last decades, threating the saltmarshes and the ecosystem services they provide. Sarcocornia fruticosa can have an important role in sequestration of metals from human activities. This study evaluated the effect of metal toxicity in saltmarsh sediment (measured by Ecological Risk Index-ERI) on S. fruticosa ability to metal (Cd, Cr, Ni, Pb and Zn...
Removal of seston by Crassostrea rhizophorae (Guilding, 1828) in the Vitoria ba...
Leite, Thayana de Alencar; Barroso, Gilberto Fonseca; Pereira Tognella, Monica Maria; Pascoalini, Savia Soares; Chicharo, LuisThe clearance of organic suspended particles by bivalve mollusks in estuarine ecosystems has been considered a critical regulating service. In Neotropical estuaries and associated mangrove ecosystems, the mangrove oyster, Crassostrea rhizophorae, is a key species in such process. To evaluate C. rhizophorae clearance rates (CRbd), biodeposit experiments were carried out at dry (2015) and wet (2016) seasons, in t...
Importância das plantas do sapal para reter os metais que chegam à Ria Formosa ...
Silva, Manuela; Duarte, D. N.; Chicharo, LuisOs sapais são ecossistemas costeiros, na transição entre a terra e o mar, que se caracterizam por ser colonizados por plantas vasculares superiores, herbáceas e arbustivas, que apresentam grande resistência à salinidade, e que por isso se designam de halófitas. Estas plantas desenvolveram ao longo do tempo estratégias de adaptação, que lhes permitem resistir a períodos de submersão, mais ou menos longos, consoa...
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...
Climate change vulnerability assessment of the main marine commercial fish and ...
Bueno-Pardo, Juan; Nobre, Daniela; Monteiro, J. N.; Sousa, Pedro M.; Costa, Eudriano; Baptista, Vânia; Ovelheiro, Andreia; Vieira, Vasco; Chicharo, LuisThis is the first attempt to apply an expert-based ecological vulnerability assessment of the effects of climate change on the main marine resources of Portugal. The vulnerability, exposure, sensitivity, adaptive capacity, and expected directional effects of 74 species of fish and invertebrates of commercial interest is estimated based on criteria related to their life-history and level of conservation or explo...
Independent effects of habitat and stream typology on macroinverte-brate commun...
Sroczyńska, Katarzyna; Leitão, Francisco; Máximo, I.; Range, Range; Furtado, A.; Claro, Marilia; Chicharo, LuisMacroinvertebrate-based water quality assessment in temporary streams is an important yet still understudied issue. Investigat-ing different aspects of macroinvertebrate distribution in these streams is therefore highly necessary for the successful imple-mentation of bio-assessment programs. We investigated the variability in macroinvertebrate communities (number of families, abundance, taxonomic richness) and ...
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 ...
Plankton community and copepod production in a temperate coastal lagoon: what i...
Cruz, Joana; Teodosio, Maria; Garrido, Susana; Ben-Hamadou, Radhouane; Chicharo, Luis; Ré, Pedro; Santos, A.M.P.Coastal lagoons are often exposed to intense short-term environmental changes and strong anthropogenic pressures influencing zooplanktonic communities and production. However, most works focus on long-term temporal scales using monthly or seasonal sampling strategies. The present study analysed the structure of the mesozooplanktonic assemblages, the production (egg production rates) and physiological condition ...
Development of a metric of aquatic invertebrates for volunteers (MAIV): a simpl...
Pinto, Paulo; Oliveira Junior, José Max; Leitão, Francisco; Morais, Maria M.; Chicharo, Luis; Vaz, Paula; Delgado, Sofia M. A.; Voreadou, CatherinaCitizen science activities, involving local people in volunteer-supported and sustainable monitoring programs, are common. In this context, the objective of the present work was to develop a simple Metric of Aquatic Invertebrates for Volunteers (MAIV), including a user-friendly tool that can be easily accessed by volunteers, and to evaluate the e ciency of a volunteer monitoring program following an audit proce...