IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Print this page

The critical scale of small-scale spatial variation in ecological patterns and processes in intertidal macrobenthic seagrass assemblages
Barnes, R.S.K.; Ellwood, M.D.F. (2012). The critical scale of small-scale spatial variation in ecological patterns and processes in intertidal macrobenthic seagrass assemblages. Est., Coast. and Shelf Sci. 98: 119-125. hdl.handle.net/10.1016/j.ecss.2011.12.014
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine
Author keywords
    benthos; invertebrates; seagrass; species co-occurrence; tidal flats; variance components

Authors  Top 
  • Barnes, R.S.K.
  • Ellwood, M.D.F.

Abstract
    Earlier work on benthic faunal assemblages in intertidal seagrass beds has shown maximal structural variation at spatial scales <150 m. To examine more closely spatial variation of species assemblages within this range, numbers of target taxa in the beds on North Stradbroke Island, Moreton Bay, Australia, were sampled at nested spatial scales of 0.5, 5, 30 and 90 m at two localities 900 m apart. Variance components were largest at the smallest scales, that at 0.5 m comprising 55% of the total and that at 5 m 13%. Individual species were patchily dispersed and their assemblages were randomly structured at all studied spatial scales. Although assemblage composition differed significantly between the two localities, overall faunal abundance and species richness were relatively uniform across the whole study area. These seagrass beds show little turn-over of dominant species and little evidence of niche partitioning through space over scales of <1 km. In this they contrast markedly with the equivalent intertidal dwarf-eelgrass beds of Knysna in South Africa that form a high turn-over, strongly structured, deterministic system.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors