1. The spatial distribution of the most important subtidal habitats (coral reefs, coral carpets, seagrass meadows, sand with corals, macroids, mud, hardgrounds) and mangroves was mapped in northern Safaga Bay, Red Sea, Egypt. Coral communities were analysed separately for their ecological and spatial patterns. This, coupled with information about major current patterns in the bay, provides a fr...

Aquatic ecologists have a rich history of including a or streamside corridor obviously is important; the land–water interface, or ecotone (Naiman & Décamps, landscape perspective in theories about lakes and 1990), directly influences critical processes such as rivers. Position in the landscape and underlying geoorganic matter inputs, shade and nutrients (Sweeney, logy provided critical insights...

Marine mammals are consumers of production at most trophic levels Because of their large body size and abundance, they are thought to have a major influence on the structure and function of some aquatic communities. However, there is relatively little empirical evidence of these roles. There are several reasons for this: research in marine ecosystems is expensive, man~pulatlve experiments are r...

1. The natural hydropattern in the seasonally-flooded marl prairie wetlands of Everglades National Park has been severely disrupted by human water control activities, seriously impacting higher trophic organisms, e.g. wading birds, that depend on these wetlands. Less is known about the impacis on key aquatic fauna, such as crayfish Procambarus alleni, or how these populations might respond to p...

almon runs in the Pacific Northwest have been declining for decades, so much so that many runs are threatened or endangered; others have been completely extirpated (Nehlsen et al. 1991). This “salmon crisis” looms large in the public eye, because it has serious and wideranging economic, cultural, and ecological repercussions. Billions of dollars have gone into industrial and agricultural projec...

heavy metal pollution in aquatic ecosystems has become one of the global issues. mollusks such as clams can be used as bioindicators and biomonitors of heavy metal pollution in these ecosystems. in fact, mussels and oysters have been widely used for this purpose. in this study, the concentrations of cadmium were measured in soft tissues of rock oysters )saccostrea cucullata( collected from two ...