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Seed germination and recolonisation of Zostera capricorni after grazing by dugongs

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Peterken, C. J. and Conacher, C. A. (1997) Seed germination and recolonisation of Zostera capricorni after grazing by dugongs. Aquatic Botany, 59 (3-4). pp. 333-340. ISSN 0304-3770

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Article Link: https://doi.org/10.1016/S0304-3770(97)00061-2

Abstract

A seagrass meadow dominated by Zostera capricorni Aschers. was intensively grazed by dugongs (Dugong dugon Müller) between November 1992 and January 1993, leaving a bare sand surface. In less than a year densities had returned to pre-grazing levels with shoot densities of around 11,000 m−2 by August 1993. Recovery of the seagrass appears to have been augmented by a high incidence of sexual reproduction. The flowering season was between August and March, with a peak in December (1219 ± 338.8 flowering shoots m−2; 11.8% of all shoots). Seeds were found in the sediment throughout the year with least in late winter and early spring (August to November). Germinating seeds were found in the sediment throughout the year with the highest number and proportion in May (86 ± 30.5 m−2 and 22%). Seed production was considerably higher at this site than has been found in previous studies of Z. capricorni.

Item Type:Article
Keywords:Seagrass; Reproduction; Recovery
Subjects:Aquaculture and Fisheries > Fisheries > Fishery conservation
Aquaculture and Fisheries > Fisheries > Seagrasses
Live Archive:19 Mar 2024 01:21
Last Modified:19 Mar 2024 01:21

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