Hierarchical scales of spatial variation in the smaller surface and near-surface macrobenthos of a subtropical intertidal seagrass system in Moreton Bay, Queensland

Barnes, R. S. K. and Barnes, M. K. S. (2011) Hierarchical scales of spatial variation in the smaller surface and near-surface macrobenthos of a subtropical intertidal seagrass system in Moreton Bay, Queensland. Hydrobiologia, 673 1: 169-178. doi:10.1007/s10750-011-0770-9


Author Barnes, R. S. K.
Barnes, M. K. S.
Title Hierarchical scales of spatial variation in the smaller surface and near-surface macrobenthos of a subtropical intertidal seagrass system in Moreton Bay, Queensland
Journal name Hydrobiologia   Check publisher's open access policy
ISSN 0018-8158
1386-1980
1573-5117
Publication date 2011-09-01
Sub-type Article (original research)
DOI 10.1007/s10750-011-0770-9
Volume 673
Issue 1
Start page 169
End page 178
Total pages 10
Editor Stuart Jenkins
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Collection year 2012
Language eng
Formatted abstract
Core samples were taken along a 4 km stretch of intertidal seagrass on North Stradbroke Island, eastern Australia, at nested scales of 1 m (stations), 150 m (sites), and 2 km (localities) to investigate the extent to which abundance, diversity, and assemblage composition of the dominant smaller members (<10 mm) of the intertidal seagrass macrobenthos vary spatially and over what scales. Gastropods and polychaetes dominated both the 91 species present and, together with decapods, also the numbers of individuals. Abundance was low (mean < 2000 individuals m−2) but species diversity was high (overall Simpson’s index of diversity 0.91), with 44% of species occurring only as one or two individuals, and with only two species contributing >10% to the total numbers (the microgastropod Calopia imitata and crab Enigmaplax littoralis, both little known, rarely recorded endemics). On average, a species only occurred at 6% of stations and only four occurred at >25%. Assemblages at the three localities did not vary significantly in gross ecological features (levels of species richness, faunal abundance and species diversity per component site) (ANOVA P ≫ 0.05), but did vary markedly in their composition at all spatial scales (PERMANOVA P < 0.05). Variance partitioning showed that components of total variance were least at the largest spatial scale (locality 15.9%) and greatest at the smallest scale (station 59.3%). The commoner individual species all showed random distributions at small spatial scales but clumped distributions at large spatial scales.
Keyword Abundance
Diversity
Dwarf-eelgrass
Intertidal
Macrobenthos
Scale
Spatial variance
Molluscan assemblages
Coastal ecosystems
Posidonia-coriacea
Species richness
Meadows
Fauna
Zosteraceae
Diversity
Habitat
Beds
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
 
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