Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Depletion of suspended particulate matter over coastal reef communities dominated by zooxanthellate soft corals
Autore:
Fabricius, KE; Dommisse, M;
Indirizzi:
Australian Inst Marine Sci, Townsville, Qld 4810, Australia Australian Inst Marine Sci Townsville Qld Australia 4810 4810, Australia CRC Reef Res, Townsville, Qld 4810, Australia CRC Reef Res Townsville QldAustralia 4810 ownsville, Qld 4810, Australia
Titolo Testata:
MARINE ECOLOGY-PROGRESS SERIES
, volume: 196, anno: 2000,
pagine: 157 - 167
SICI:
0171-8630(2000)196:<157:DOSPMO>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
GREAT-BARRIER-REEF; PHYTOPLANKTON; GROWTH; FLOW; RETENTION; AUSTRALIA; HERBIVORY; DYNAMICS; BOUNDARY; LAGOON;
Keywords:
suspended particulate matter (SPM); particulate organic matter (POM); in situ depletion; budget; suspension feeding; alcyonacea; octocorallia; coral reef;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Fabricius, KE Australian Inst Marine Sci, PMB 3, Townsville, Qld 4810, Australia Australian Inst Marine Sci PMB 3 Townsville Qld Australia 4810
Citazione:
K.E. Fabricius e M. Dommisse, "Depletion of suspended particulate matter over coastal reef communities dominated by zooxanthellate soft corals", MAR ECOL-PR, 196, 2000, pp. 157-167

Abstract

Coastal reef communities dominated by zooxanthellate alcyonacean octocorals extract large quantities of suspended particulate matter (SPM) from the water column. Concentrations of SPM in water parcels, tracked by a curtain drogue, were measured before and after passing over 2 strips of soft coral dominated, near-shore reefs similar to 200 m long, and over 2 adjacent sand-dominated strips for comparison. The reefs were covered with 50% zooxanthellate octocorals (total standing stock: similar to 270 g AFDW m(-2); mean live tissue volume: 70 l m(-2)), 7 % hard corals, 15 % turf algae with bioeroding sponges underneath, and <1% other filter feeders (sponges, tunicates, and bivalves). Downstream of the reef communities, chlorophyll, particulateorganic carbon and particulate phosphorus were significantly depleted. Thedepletion of chlorophyll averaged 35 % of the standing stock, whereas the net depletion of particulate organic carbon and particulate phosphorus was 15 and 23 %, respectively. Rates of depletion were similar for the 2 reef sites and 3 sampling periods, and were independent of upstream particle concentration. In contrast, concentrations of particulate nitrogen and phaeopigments were similar before and after passage across the reef sites. On the sandy sites, downstream concentrations of particulate nutrients, chlorophylland phaeopigments were all similar to upstream concentrations. The net import of particulate organic carbon into the reef was estimated as 2.5 +/- 1.1 g C m(-2) d(-1). Less than 20% of this carbon import could be explained by area-specific rates of removal by sponges, tunicates, bivalves, and hard corals, suggesting that soft corals were the primary sink of carbon. The data suggest that detritus and other small SPM (<10 pm particle size) are an important food source for alcyoniid-dominated reef communities in high turbidity regimes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 09:33:20