We found no evidence that large-bodied fish were transporting remote carbon from the floodplain or estuary into the lower main-channel of the river. We recommend that water planners take a precautionary approach to policy until sufficient food web evidence is amassed....
Food webs provide fascinating examples of biological organization in ecol... C Caretta Cartozo,D Garlaschelli,G Caldarelli - 《Oxford University Press》 被引量: 11发表: 2006年 Dam regulation and riverine food-web structure in a Mediterranean river Flow regimes are a major driver of community ...
food web- (ecology) a community of organisms where there are several interrelated food chains food cycle bionomics,environmental science,ecology- the branch of biology concerned with the relations between organisms and their environment organic phenomenon- (biology) a natural phenomenon involving living ...
foodwebsdifferedaccordingtophysiographicregionorriversub-basin.Therewereno statisticallysignificantdifferencesinthe17food-webpropertiescalculatedamongthe rivers.Incontrast,fishspeciesrichness,connectance,theproportionofherbivores,and theproportionofcannibalschangedlongitudinallyalongtherivernetwork.Ourresults ...
We constructed flow food webs at six locations along a 386-km segment of the Colorado River in Grand Canyon (Arizona, USA) for three years. We characterized food-web structure and production, trophic basis of production, energy efficiencies, and interaction-strength distributions across a spatial ...
River food webs are subject to two regimes of longitudinally varying ecological control: productivity and disturbance. Light-limited productivity increases
and bacteria (a 450 bp fragment of the 16S barcode region) in a large-scale river network over the course of three seasons (spring, summer and autumn). We found contrasting effects on biodiversity patterns and food-web structure from spatial and temporal influences and their interaction, prov...
of species on the basis of the proportion of different food items in their gut contents. Food webs were constructed for each wetland using the gut content data and structural attributes, such as food web size, number, complexity, and density of trophic links among others, were estimated. Our...
SEASONAL REASSEMBLY OF A RIVER FOOD WEB: FLOODS, DROUGHTS, AND IMPACTS OF FISH Flood scour, by suppressing invulnerable grazers, set the stage for fish mediated effects on algae in this river food web. Whether these effects were ... ME Power,MS Parker,WE Dietrich - 《Ecological Monographs》...
Simulations suggest that side-channel reconnection may be a better strategy than carcass addition and vegetation planting for improving conditions for salmon in this river segment. However, modeled responses were strongly sensitive to changes in the structure of the food web. The addition of nonnative...