Zooplankton biomass and rates of ingestion, egestion and production in the equatorial Pacific Ocean along 140degreesW and 180degrees exhibit maximum values in the High-Nutrient Low-Chlorophyll (HNLC) zone associated with equatorial upwelling (5degreesS-5degreesN) as compared to the more oligotrophic regions to the north and south.

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Understanding the ecological role of benthic microalgae, a highly productive component of coral reef ecosystems, requires information on their spatial distribution. The spatial extent of benthic microalgae on Heron Reef (southern Great Barrier Reef, Australia) was mapped using data from the Landsat 5 Thematic Mapper sensor. integrated with field measurements of sediment chlorophyll concentration and reflectance. Field-measured sediment chlorophyll concentrations.

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Seagrass meadows are considered important for sediment trapping and sediment stabilisation. Deposition of fine sediments and associated adsorbed nutrients is considered an important part of the chemical and biological processes attributed to seagrass communities. This paradigm was based on work in temperate regions on Zostera marina and in tropical regions on Thalassia testudinum, two species that maintain relatively high biomass, stable meadows.

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Current shrimp pond management practices generally result in elevated concentrations of nutrients, suspended solids, bacteria and phytoplankton compared with the influent water. Concerns about adverse environmental impacts caused by discharging pond effluent directly into adjacent waterways have prompted the search for cost-effective methods of effluent treatment.

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Marine Pollution in the United States: Significant Accomplishments, Future Challenges has been prepared by UMCES' faculty experts for use by the Pew Oceans Commission in evaluating national oceans policy regarding environmental quality and marine resources. The Pew Oceans Commission is an independent group of distinguished Americans conducting a national dialogue on the policies needed to restore and protect living marine resources in U.S. waters.

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Despite evidence linking shrimp farming to several cases of environmental degradation, there remains a lack of ecologically meaningful information about the impacts of effluent on receiving waters. The aim of this study was to determine the biological impact of shrimp farm effluent, and to compare and distinguish its impacts from treated sewage effluent.

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This book was the third in a series of publications in support of the Healthy Waterways campaign in Southeast Queensland, Australia. It provides a guide for citizens to view various features of the waterways from specified vantage points. Grounded in the scientific understanding developed for the region, this book is an invitation to 'see it for yourself'. The book includes maps, conceptual diagrams, photos and 'catchment comments' from community leaders.

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Discover the waterways of south-east Queensland: waterways health and catchment management of south-east Queensland, Australia

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Marine viruses have been shown to affect phytoplankton productivity; however, there are no reports on the effect of viruses on benthic microalgae (microphytobenthos). Hence, this study investigated the effects of elevated concentrations of virus-like particles on the photosynthetic physiology and community composition of benthic microalgae and phytoplankton.

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Coral reef degradation resulting from nutrient enrichment of coastal waters is of increasing global concern. Although effects of nutrients on coral reef organisms have been demonstrated in the laboratory, there is little direct evidence of nutrient effects on coral reef biota in situ.

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