2024-03-29T14:45:49Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1252412019-03-06T12:09:16Zcom_10261_123com_10261_8col_10261_502
Mamouridis, Valeria
Van Oevelen, Dick
Soetaert, Karline
Cartes, Joan Enric
Fanelli, Emanuela
Papiol, Vanesa
2014-11-17
2nd International Ocean Research Conference (2014)
http://hdl.handle.net/10261/125241
We explored the dynamics of a food web in the continental slope of the NW Mediterranean at 600-650m depth, an area historically subjected to the fishery of the red shrimp Aristeus antennatus. We considered two inputs of carbon: the organic matter from the vertical fall through the water column and from the advective transport through the slope, and four outputs (loss of carbon): the burial process in sediments, the dissipation through respiration, and the loss due to the fishing activity on target (red shrimp) and by-catch species (fish and few invertebrates). Internal components of the food web are: the organic matter in sediment, the macrobenthos, the zooplankton-micronekton and the suprabenthos, that rely directly on the organic matter in sediments and\\or external inputs, and the megafauna components (megabenthos, megaichthyofauna and the red shrimp), that prey on previous compartments. The most of the carbon flows through the macrobenthos, that play a key structural role in the community. We focused on the dynamics between red shrimp and other components to investigate the role of this species. In turn we investigated competition between predators and between species at the lowest trophic level and finally predator-prey interactions under different condition of source availability (bottom-up control) and fishing activity (top-down control). Different scenarios for inputs and outputs allowed to define the relative importance of both types of control on the food web dynamics
eng
closedAccess
Trophodynamics in a bathyal food web (NW Mediterranean) controlled by food limitations and fishing activity
pĆ³ster de congreso