Colonisation by epibionts and meiofauna of real and mimic pneumatophores in a cool temperate mangrove habitat

Gwyther, Janet and Fairweather, Peter 2002, Colonisation by epibionts and meiofauna of real and mimic pneumatophores in a cool temperate mangrove habitat, Marine ecology progress series, vol. 229, pp. 137-149, doi: 10.3354/meps229137.

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Title Colonisation by epibionts and meiofauna of real and mimic pneumatophores in a cool temperate mangrove habitat
Author(s) Gwyther, Janet
Fairweather, Peter
Journal name Marine ecology progress series
Volume number 229
Start page 137
End page 149
Publisher Inter-Research
Place of publication Halstenbek, Germany
Publication date 2002-03
ISSN 0171-8630
Keyword(s) algae
Avicennia marina
Barwon estuary
field experiment
Summary The size and pace of change in meiofaunal assemblages suggest that meiofauna make excellent subjects for testing theories about how ecological communities change. A field experiment was performed in which the  abundance and composition of epibionts and meiofauna on natural,  transplanted and mimic pneumatophores were monitored over a 47 wk period. Meiofaunal density increased with growth of algal epibionts, both reaching maximum values after 24 wk, at the end of winter. At this time the assemblages from the 3 substrata were similar, although the combined abundances of meiofauna on transplants and mimics were only 28% of the average on natural pneumatophores. Meiofaunal abundance on all substrata decreased rapidly during spring as algal cover declined due to desiccation. Twenty-three species of nematode were recorded from mimics compared with 8 and 7 from transplants and pneumatophores, respectively. A temporal sequence of feeding groups occurred in the order of epigrowth feeders, deposit feeders, and omnivore/predators, with the latter 2 adding to rather than replacing earlier trophic groups. Scavengers were found only on natural pneumatophores. The turnover rates of nematode species between all census times were similar, peaking at 63%, but there was no trend in the turnover rates with time. We conclude that mimics are more suitable than transplanted pneumatophores for colonisation studies because of their greater persistence and more easily standardised surface area. Moreover, the composition of colonising assemblages on them closely resembled assemblages on natural pneumatophores at the time of peak meiofaunal abundance.
Language eng
DOI 10.3354/meps229137
Field of Research 050102 Ecosystem Function
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2002, Inter-Research
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Document type: Journal Article
Collection: School of Ecology and Environment
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