caa a22 4500 445893060 CHVBK 20180317145622.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10750-011-0668-6 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0668-6 Functional diversity and species turnover of benthic invertebrates along a local environmental gradient induced by an aquaculture unit: the contribution of species dispersal ability and rarity [Elektronische Daten] [Charalampos Dimitriadis, Drosos Koutsoubas] The relation of macrobenthic species turnover (beta diversity) and species plylogenetic variation with functional diversity patterns, across an environmental gradient induced by an aquaculture unit, in a coastal area of the island of Lesvos (NE Aegean) has been investigated in this study. The contribution of rare species response and species dispersal ability in the variation of functional diversity patterns along the environmental gradient, on a spatio-temporal scale, has been also examined. Our results revealed that benthic functional diversity was decreasing monotonically with increasing species turnover rate and hence with increasing spatial variability along the environmental gradient. Increased environmental stress which was detected in the immediate vicinity of the fish cages resulted to low species functional redundancy, since different species didn't perform the same functional role at the most disturbed part of the established gradient. Functional diversity patterns were found to be correlated with species population size, whereas a strong linear relationship was also detected with phylogenetic diversity patterns, thus supporting the claim that wider local taxonomic trees can support a wider range of species functions even in small spatial scales. Rare species loss seemed to be one of the dominant factors ruling functional diversity variation. Species with the minimum possible dispersal ability, which were mostly rare, tend to diminish both in species number and population size faster than species with wider dispersal ability towards the most disturbed areas. The aforementioned results indicate that rare species variation and endemic species loss are critical factors in determining functional diversity loss across a human-induced environmental gradient in soft bottom benthic communities. Springer Science+Business Media B.V., 2011 Functional diversity nationallicence Beta diversity nationallicence Aquaculture nationallicence Benthos nationallicence Dimitriadis Charalampos Department of Marine Sciences, Faculty of Environment, University of the Aegean, 81100, Lesvos Island, Greece aut Koutsoubas Drosos Department of Marine Sciences, Faculty of Environment, University of the Aegean, 81100, Lesvos Island, Greece aut Hydrobiologia Springer Netherlands 670/1(2011-07-01), 307-315 0018-8158 670:1<307 2011 670 10750 https://doi.org/10.1007/s10750-011-0668-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0668-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dimitriadis Charalampos Department of Marine Sciences, Faculty of Environment, University of the Aegean, 81100, Lesvos Island, Greece aut NATIONALLICENCE 700 1- Koutsoubas Drosos Department of Marine Sciences, Faculty of Environment, University of the Aegean, 81100, Lesvos Island, Greece aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 670/1(2011-07-01), 307-315 0018-8158 670:1<307 2011 670 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer