Organic enrichment of submarine-canyon and continental-shelf benthic communities by macroalgal drift imported from nearshore kelp forests

Article Abstract:

Forests of giant kelp (Macrocystis pyrifera) along the coast are a source of macroalgal drift that provides significant organic enrichment to benthic communities in adjacent submarine canyons. In the Carmel Submarine Canyon macroalgal drift was abundant, but it was rare at Pt. Joe, a nearby continental shelf area. The drift M. pyrifera could make up 20-83% of the amount of particulate organic carbon that reaches the sea floor of the Carmel Submarine Canyon.

California, Continental shelf, Continental shelves, Carbon cycle (Biogeochemistry), Carbon cycle, Kelp bed ecology, Kelp forests, Submarine valleys, Submarine canyons

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Minireview: the importance of benthic-pelatic coupling and the forgotten role of life cycles in coastal aquatic systems

Article Abstract:

Models of coastal aquatic systems should incorporate information on the life-cycle stages of planktonic and benthic organisms. Most studies of benthic-pelagic coupling have focused only on biogeochemical cycling of nutrients. Information concerning the benthic resting stages of both phyto- and zooplankton should be added to the biogeochemical model of benthic-pelagic coupling. The idea of supply-vertical ecology can also be applied.

Analysis, Plankton, Life cycles (Biology), Coastal ecology

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Simultaneous top-down and bottom-up forces control macroalgal blooms on coral reefs

Article Abstract:

Control of macroalgal blooms on coral reefs by simultaneous top-down and bottom-up forces is discussed relative to a study of reefs of Jamaica and of southeast Florida. Nutrient enrichment, a bottom-up force, and grazing, a top-down force, would be controlling factors in the hypothesis. Arguments for the validity of the hypothesis are advanced.

Florida, Jamaica, Statistical Data Included, Usage, Algae, Mathematical models, Eutrophication, Caribbean Sea, Coral reefs and islands, Coral reefs, Upwelling (Oceanography)

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