Article (Scientific journals)
Multiscale variability of amphipod assemblages in Posidonia oceanica meadows
Sturaro, Nicolas; Lepoint, Gilles; Vermeulen, Simon et al.
2015In Journal of Sea Research, 95, p. 258-271
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Keywords :
Amphipod assemblages; Posidonia oceanica; seagrass; hierarchical sampling design; Mediterranean Sea
Abstract :
[en] The study of spatial patterns is of ecological importance in order to understand the causes of the distribution and abundance of organisms, and it also provides valuable basis for management and conservation. Amphipod crustaceans are key organisms in seagrass ecosystems. However, little attention has been paid to the spatial scales at which amphipod assemblages may vary. We examined variability patterns of amphipod populations inhabiting Posidonia oceanica meadows, over spatial scales spanning four orders of magnitude (1 to 1000 metres) and for two consecutive years. This study reports the scales that contributed most to spatial variation of amphipod assemblages and explores the potential processes of the observed patterns, with particular emphasis on habitat features. The number of species, the diversity and the density of some species, exhibited high variation across years. Most species showed the highest spatial variation in density and biomass at small scales (~1 and 10 m). Based on density data, the structure of amphipod assemblages did not differ at any scales investigated. The patchiness that occurred at small scales may have been only weakly related to habitat features. Instead, we postulated that behavioural processes of amphipods were likely good explanatory factors. Although, the small scale spatial variability can be an important feature of amphipod assemblages in P. oceanica meadows, many patterns probably remained undetected as they may occur at scales smaller than those investigated.
Disciplines :
Zoology
Environmental sciences & ecology
Aquatic sciences & oceanology
Author, co-author :
Sturaro, Nicolas ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Lepoint, Gilles  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Vermeulen, Simon;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Gobert, Sylvie  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanologie
Language :
English
Title :
Multiscale variability of amphipod assemblages in Posidonia oceanica meadows
Publication date :
2015
Journal title :
Journal of Sea Research
ISSN :
1385-1101
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
95
Pages :
258-271
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 January 2014

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