Benthic communities play an important role in the nutrient cycling of settling organic matter and provide energy link to higher trophic levels. These benthic are highly dependent on food sources provided through sinking material, with pelagic-benthic coupling particularly strong Arctic shelf systems. shelves, however, experiencing shifts timing sea ice breakup that can have severe implications ...

Dispersal capacity plays a fundamental role in the riverine benthic invertebrate colonization of new habitats that emerges following flash floods or restoration. However, an appropriate measure of dispersal capacity for benthic invertebrates is still lacking. The dispersal of benthic invertebrates occurs mainly during the aquatic (larval) and aerial (adult) life stages, and the dispersal of eac...

Knowledge of dispersal vectors used by organisms is essential to the understanding of population and community dynamics. We report on ice rafting, a vector by which intertidal benthic invertebrates can be transported well outside their normal dispersal range during winter in temperate climates. We found multiple invertebrate taxa in sediment-laden ice blocks sampled in the intertidal zone. A la...

Effect of selenium on uptake of cadmium in the benthic marine invertebrates Asterias rubens, Mytilus edulis, Littorina littorea, and Arenicola marina was investigated in a series of laboratory experiments. A. rubens exposed to 200 ~cg Cd 1-' alone took up cadmium in body wall, pyloric caeca, and tube feet at initial rates of 1 to 2 pg Cd g-' dry wt d-'; steady state concentrations of 10 to 30 p...

Evidence for nudibranch molluscs is presented which shows a clear relationship between egg-size and developmental mode (planktotrophic, lecithotrophic and direct development), egg-size and development time, and thereby larval strategy and development time. Egg-to-juvenile periods differ significantly according to strategy, with lecithotrophic pelagic development being the briefest, and planktot...

Khuzestan coastal waters have high fisheries potential and ecological importance. Since different sources of stress exist in this area, the present study was conducted to evaluate ecological quality and to determine health status in Khuzestan coastal sediments based on benthic communities and their biological parameters. Seasonal sampling was done from 20 creeks of Khur-e-Mussa area in Khuzesta...

Abstract Goose and swan populations have increased concurrently with environmental degradation of wetlands, such as eutrophication, vegetation losses, decrease in biodiversity. An important question is whether geese swans contribute to changes or if they instead benefit from them. We collected data 37 wetlands southern Sweden April − July 2021 study relationships between geese, other waterbird ...