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Effects of concentrated viral communities on photosynthesis and community composition of co-occurring benthic microalgae and phytoplankton (Page 1)

Effects of concentrated viral communities on photosynthesis and community composition of co-occurring benthic microalgae and phytoplankton

Hewson I, O'Neil JM, Heil CA, Bratbak G, and Dennison WC ·
2001

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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ENCORE: The effect of nutrient enrichment on coral reefs. Synthesis of results and conclusions (Page 1)

ENCORE: The effect of nutrient enrichment on coral reefs. Synthesis of results and conclusions

Koop K, Booth D, Broadbent A, Brodie J, Bucher D, Capone D, Coll J, Dennison WC, Erdmann M, Harrison P, Hoegh-Guldberg O, Hutchings P, Jones GB, Larkum AWD, O'Neil JM, Steven A, Tentori E, Ward S, Williamson J, and Yellowlees D ·
2001

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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Integrated treatment of shrimp effluent by sedimentation, oyster filtration and macroalgal absorption: a laboratory scale study (Page 1)

Integrated treatment of shrimp effluent by sedimentation, oyster filtration and macroalgal absorption: a laboratory scale study

Jones AB, Dennison WC, and Preston NP ·
2001

Effluent water from shrimp ponds typically contains elevated concentrations of dissolved nutrients and suspended particulates compared to influent water. Attempts to improve effluent water quality using filter feeding bivalves and macroalgae to reduce nutrients have previously been hampered by the high concentration of clay particles typically found in untreated pond effluent. These particles inhibit feeding in bivalves and reduce photosynthesis in macroalgae by increasing effluent turbidity.

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Virus-like particles associated with Lyngbya majuscula (Cyanophyta; Oscillatoriacea) bloom decline in Moreton Bay, Australia (Page 1)

Virus-like particles associated with Lyngbya majuscula (Cyanophyta; Oscillatoriacea) bloom decline in Moreton Bay, Australia

Hewson I, O'Neil JM, and Dennison WC ·
2001

Expansive blooms of the toxic cyanobacterium Lyngbya majuscula were observed in 2 shallow water regions of Moreton Bay, Australia. The rapid bloom decline (8 to <1 km(2) in <7 d) prompted an investigation of the role of cyanophage viruses in the ecophysiology of L. majuscula. Virus-like particles produced by decaying L. majuscula were observed using electron microscopy. The virus-like particles were similar in morphology to viruses in the genus Cyanostyloviridae.

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Ecosystems and Global Climate Change: A review of potential impacts on U.S. terrestrial ecosystems and biodiversity (Page 1)

Ecosystems and Global Climate Change: A review of potential impacts on U.S. terrestrial ecosystems and biodiversity

Malcolm JR and Pitelka LF ·
1 December 2000

This report was prepared for the Pew Center on Global Climate Change to provide an overview of the potential effects of climate change on natural terrestrial ecosystems and their component species. Published in December 2000, it is the fifth in a series of reports examining the potential impacts of climate change on the U.S. environment. Coordinator:

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Effect of the seagrass Zostera capricorni on sediment microbial processes (Page 1)

Effect of the seagrass Zostera capricorni on sediment microbial processes

Hansen JW, Udy JW, Perry CJ, Dennison WC, and Lomstein BA ·
2000

The effect of the seagrass Zostera capricorni on sediment microbial processes was studied in a tank experiment, where vegetated and unvegetated control sediments were incubated in 10 and 50% of incident light. Leaf and root-rhizome biomass, shoot density, and leaf productivity were significantly higher when plants were incubated in 50 % than in 10 % of incident Light.

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