Uniform functional structure across spatial scales in an intertidal benthic assemblage

Barnes, R. S. K. and Hamylton, Sarah (2015) Uniform functional structure across spatial scales in an intertidal benthic assemblage. Marine Environmental Research, 106 1: 82-91. doi:10.1016/j.marenvres.2015.03.006

Author Barnes, R. S. K.
Hamylton, Sarah
Title Uniform functional structure across spatial scales in an intertidal benthic assemblage
Journal name Marine Environmental Research   Check publisher's open access policy
ISSN 0141-1136
Publication date 2015-05
Sub-type Article (original research)
DOI 10.1016/j.marenvres.2015.03.006
Open Access Status Not yet assessed
Volume 106
Issue 1
Start page 82
End page 91
Total pages 10
Place of publication London, United Kingdom
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
To investigate the causes of the remarkable similarity of emergent assemblage properties that has been demonstrated across disparate intertidal seagrass sites and assemblages, this study examined whether their emergent functional-group metrics are scale related by testing the null hypothesis that functional diversity and the suite of dominant functional groups in seagrass-associated macrofauna are robust structural features of such assemblages and do not vary spatially across nested scales within a 0.4 ha area. This was carried out via a lattice of 64 spatially referenced stations. Although densities of individual components were patchily dispersed across the locality, rank orders of importance of the 14 functional groups present, their overall functional diversity and evenness, and the proportions of the total individuals contained within each showed, in contrast, statistically significant spatial uniformity, even at areal scales <2 m2. Analysis of the proportional importance of the functional groups in their geospatial context also revealed weaker than expected levels of spatial autocorrelation, and then only at the smaller scales and amongst the most dominant groups, and only a small number of negative correlations occurred between the proportional importances of the individual groups. In effect, such patterning was a surface veneer overlying remarkable stability of assemblage functional composition across all spatial scales. Although assemblage species composition is known to be homogeneous in some soft-sediment marine systems over equivalent scales, this combination of patchy individual components yet basically constant functional-group structure seems as yet unreported.
Keyword Autocorrelation
Functional analysis
Sea grass
Spatial dispersion
Spatial variation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biological Sciences Publications
Centre for Marine Studies Publications
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 2 times in Scopus Article | Citations
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