Seasonal variation in the production, biomass and nutrient status of Amphibolis antarctica (Labill.) Sonder ex Aschers. and Posidonia australis hook.f. in Shark Bay, Western Australia

D.I. Walker; A.J. McComb

doi:10.1016/0304-3770(88)90016-2

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Seasonal variation in the production, biomass and nutrient status of Amphibolis antarctica (Labill.) Sonder ex Aschers. and Posidonia australis hook.f. in Shark Bay, Western Australia

Journal article

Peer reviewed

Seasonal variation in the production, biomass and nutrient status of Amphibolis antarctica (Labill.) Sonder ex Aschers. and Posidonia australis hook.f. in Shark Bay, Western Australia

D.I. Walker and A.J. McComb

Aquatic Botany, Vol.31(3-4), pp.259-275

1988

DOI: https://doi.org/10.1016/0304-3770(88)90016-2

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Abstract

Total annual production of Amphibolis antarctica (Labill.) Sonder ex Aschers. and Posidonia australis Hook.f. were measured for monospecific meadows at adjoining sites in Shark Bay during 1982–1983 and values of 1.6 and 1.0 kg dry weight m−2, respectively, were obtained. Amphibolis antarctica had maximum production in summer, coincident with high light intensities and temperatures, whereas P. australis showed no clear seasonal pattern. Both species had maximum specific growth rates in summer. There were fluctuations in plant tissue concentrations of nitrogen and phosphorus, but standing-stock values for total nitrogen and total phosphorus were relatively constant in the meadows. Amounts of nutrients incorporated into new growth were 49.7 mg total nitrogen and 3.6 mg total phosphorus m−2 day−1 for A. antarctica, and 25.6 mg total nitrogen and 4.3 mg total phosphorus m−2 day−1 for P. australis. The dominance of A. antarctica in Shark Bay, a nutrient-poor environment, is reflected in its higher productivity and this may be related to its more efficient utilization of phosphorus.

Details

Title: Seasonal variation in the production, biomass and nutrient status of Amphibolis antarctica (Labill.) Sonder ex Aschers. and Posidonia australis hook.f. in Shark Bay, Western Australia
Authors/Creators: D.I. Walker (Author/Creator) - The University of Western Australia
A.J. McComb (Author/Creator) - The University of Western Australia
Publication Details: Aquatic Botany, Vol.31(3-4), pp.259-275
Publisher: Elsevier BV
Identifiers: 991005540618507891
Copyright: © 1988 Published by Elsevier B.V.
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

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Citation topics: 3 Agriculture, Environment & Ecology; 3.2 Marine Biology; 3.2.1182 Coastal Vegetation
Web Of Science research areas: Marine & Freshwater Biology; Plant Sciences
ESI research areas: Plant & Animal Science