Productivity and abundance of large sponge populations on flinders reef flats, coral sea

Large populations of flattened sponges with cyanobacterial symbionts were observed on the shallow reef-flats of the Flinders Reefs, Coral Sea. Estimates of these populations indicated as many as 60 individuals with a total wet biomass of 1.2 kg per m super(2) in some areas. Along a metre wide transe...

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Veröffentlicht in:Coral reefs 1987-04, Vol.5 (4), p.183-188
1. Verfasser: WILKINSON, C. R
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description Large populations of flattened sponges with cyanobacterial symbionts were observed on the shallow reef-flats of the Flinders Reefs, Coral Sea. Estimates of these populations indicated as many as 60 individuals with a total wet biomass of 1.2 kg per m super(2) in some areas. Along a metre wide transect across 1.3 km of reef flat the population was estimated at 530 kg wet weight sponge (mean 411 g m super(-2)). The four prominent species had instantaneous P/R ratios between 1.3 and 1.8 at optimum light such that photosynthetic productivity was calculated to provide between 61 and 80% of sponge energy requirements in summer and 48 to 64% in winter. While such sponge beds are a prominent feature of these reefs, they appear to contribute less than 10% of gross reef-flat productivity.
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subjects Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Carteriospongia
Fundamental and applied biological sciences. Psychology
Marine
Phyllospongia
Porifera
Sea water ecosystems
Synecology
Thorectidae
title Productivity and abundance of large sponge populations on flinders reef flats, coral sea
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