caa a22 4500 445891041 CHVBK 20180317145616.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s10750-011-0770-9 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0770-9 Hierarchical scales of spatial variation in the smaller surface and near-surface macrobenthos of a subtropical intertidal seagrass system in Moreton Bay, Queensland [Elektronische Daten] [R. Barnes, M. Barnes] Core samples were taken along a 4km stretch of intertidal seagrass on North Stradbroke Island, eastern Australia, at nested scales of 1m (stations), 150m (sites), and 2km (localities) to investigate the extent to which abundance, diversity, and assemblage composition of the dominant smaller members (<10mm) 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. Springer Science+Business Media B.V., 2011 Abundance nationallicence Diversity nationallicence Dwarf-eelgrass nationallicence Intertidal nationallicence Macrobenthos nationallicence Scale nationallicence Spatial variance nationallicence Barnes R. School of Biological Sciences, University of Queensland, 4072, Brisbane, QLD, Australia aut Barnes M. Plymouth Marine Laboratory, The Hoe, PL1 3DH, Plymouth, UK aut Hydrobiologia Springer Netherlands 673/1(2011-09-01), 169-178 0018-8158 673:1<169 2011 673 10750 https://doi.org/10.1007/s10750-011-0770-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0770-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Barnes R. School of Biological Sciences, University of Queensland, 4072, Brisbane, QLD, Australia aut NATIONALLICENCE 700 1- Barnes M. Plymouth Marine Laboratory, The Hoe, PL1 3DH, Plymouth, UK aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 673/1(2011-09-01), 169-178 0018-8158 673:1<169 2011 673 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer