12 documents found, page 1 of 2
Varying response of bacteria and nematodes to environmental conditions of Sado ...
Vieira, S.; Vicente, C.; Neves, J.; Martins, M.; Adão, H.; Sroczynska, K.Sediment microbiome and benthic nematodes are indispensable in regulating benthic estuarine ecosystems and knowledge on their distribution patterns is essential for understanding of benthic food webs dynamics. However, simultaneous ecological analysis of bacteria and nematodes communities are seldom made, whereas the question if there exist a congruence between both taxonomic groups in their responses to differ...
Nematode communities from a natural oil seep off Svalbard
Balsa, J.; Argentino, C.; Riva, F.; Adão, H.; Panieri, G.; Ramalho, S.P.Cold-seep sediments, where active fluid seepage rich is observed, have been associated with the presence of endemic nematode communities. Under the scope of the AKMA project, a seep site located offshore Svalbard was sampled for the first time to investigate the Nematoda assemblages associated with methane and crude oil seepage. Replicated samples were collected by means of the blade- and push-cores, on a bacte...
Nematode communities from a natural oil seep off Svalbard.
Balsa, J.; Argentino, C.; Riva, F.; Adão, H.; Panieri, G.; Ramalho, S.P.Cold seeps are considered hotspots of energy on the seafloor, establishing unique conditions for life to thrive. In chemosynthetic-based habitats such as these, sediments from active sites are typically inhabited by endemic nematode communities which tolerate the local reduced environmental conditions, but no studies have been carried out on seep sites so far north in the Arctic. Under the scope of the AKMA pro...
Spatial distribution patterns of microbiome and free-living benthic nematodes i...
Vieira, S.; Sroczyńska, K.; Adão, H.; Vicente, C.Spatial distribution patterns of microbiome and free-living benthic nematodes in response to sediment ecological conditions in Sado estuary, Portugal. Soraia Vieira1 (svvieira@uevora.pt), Kasia Sroczyńska1, Marta Martins2, Maria Costa2, Joana Neves2, Helena Adão1, Cláudia Vicente3 1 MARE-UÉ - Marine and Environmental Sciences Centre, University of Évora, University of Évora, Évora, Portugal; 2 MARE – Marine and...
Occurrence of marine litter along abyssal areas of the Gloria Fracture Zone (NE...
Ramalho, S.; Ferreira, T.; Hensen, C.; Terrinha, P.; Schmidt, M.; Sroczynska, K.; Adão, H.Marine litter pollution is a recognized form of anthropogenic disturbance that affects widely the marine environment, particularly near the continental margins, although also present at abyssal and bathyal depths. This study reports the occurrence of marine litter distribution and abundance in four abyssal basins along the Gloria fracture zone in the NE Atlantic. Litter items occurrences were analysed using TV-...
Megafauna communities from abyssal sites along the Gloria Fracture Zone (NE Atl...
Ferreira, T.; Hensen, C.; Terrinha, P.; Schmidt, M.; Muller, T.; Sroczynska, K.; Ramalho, S.; Adão, H.Fracture zones are areas of poorly known abyssal landscapes and benthic faunal communities. During the R/V Meteor M162 cruise several imagery surveys were performed using a TV-CTD guided camera system along four main areas of the Gloria fault system, between the Terceira ridge and the Madeira Tore Rise. Based on these records, we were able to characterize - for the first time - the megafaunal composition, their...
Ecossistemas do Mar Profundo
Colaço, A.; Carreiro e Silva, M.; Giacomello, E. ., Gomes-Pereira, J. N., Menezes, G., Barros; Gordo, L; Vieira, A.; Adão, H.; Gomes-Pereira, J. N.Terra é um planeta azul, em que 70% da superfície está ocupada por mar. Mais de 90% desse enorme volume está a profundidades superiores a 200 metros, onde a luz escasseia e a vida toma contornos diferentes dos que se observam nas zonas onde a energia solar penetra. O fundo do mar, na sua escuridão, é a última grande fronteira marinha a ser explorada. Denominado “mar profundo”, esse gigantesco ambiente, cujo pot...
Development of a novel molecular tool for the rapid assessment of the biodivers...
Avó, A.P.; Daniell, T.; Nielson, R.; Oliveira, S.; Adão, H.The molecular profiling system was developed using directed terminal-restriction fragment length polymorphism (dT-RFLP) to characterize soil nematode assemblages by relative abundance of feeding guilds and validation by comparison to traditional morphological method. The good performance of these molecular tools applied to soil nematodes assemblages create an opportunity to develop a novel approach for rapid as...
Enzymatic activity on sediments and nematode assemblage responses during seagra...
Branco, J.; Pedro, S.; Mendes, R.; Ribeiro, C.; Materatski, P.; Caçador, I.; Adão, H.Sediment digging is an anthropogenic activity connected to the exploitation of living resources in estuarine and marine environments. The knowledge on the functional responses of the benthic assemblages to the physical disturbance is an important baseline to understand the ecological processes of the habitat recovery and restoration and to develop tools for the management of the harvesting activities. To invest...
Benthic nematode assemblage composition and diversity during a natural recovery...
Materatski, P.; Vafeiadou, Anna-Maria; Moens, T.; Adão, H.In 2008, the stable seagrass beds of the Mira estuary (SW Portugal) disappeared completely; however, during 2009, they have begun to present early symptoms of natural recovery, characterised by a strongly heterogeneous distribution. This study was designed to investigate the spatial and temporal variability patterns of species composition, densities and trophic composition of the benthic nematode assemblages in...