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Title Flooding and hydrologic connectivity modulate community assembly in a dynamic river-floodplain ecosystem Author info Stefano Larsen ... [et al.] Author Larsen Stefano (30%)
Co-authors Karaus Ute (20%)
Claret Cecile (20%)
Šporka Ferdinand (10%)
Hamerlík Ladislav 1974- (10%) UMBFP09 - Katedra biológie a ekológie
Tockner Klement (10%)
Source document PLOS ONE. Vol. 14, no. 4 (2019), pp. [1-22]. - San Francisco : Public Library of Science, 2019 Keywords ekológia - ecology biológia - biology ekosystémy - ecosystems rieky - rivers záplavy hydrológia - hydrology Form. Descr. články - journal articles Language English Country United States of America Annotation Braided river floodplains are highly dynamic ecosystems, where aquatic communities are strongly regulated by the hydrologic regime. So far, however, understanding of how flow variation influences assembly mechanisms remains limited. We collected benthic chironomids and oligochaetes over a year across a lateral connectivity gradient in the semi-natural Tagliamento River (Italy). Four bankfull flood events occurred during the study, allowing the assessment of how flooding and hydrologic connectivity mediate the balance between stochastic and deterministic community assembly. While invertebrate density and richness were positively correlated with connectivity, diversity patterns showed no significant correlation. Species turnover through time increased with decreasing connectivity. Contrary to expectations, hydrologic connectivity did not influence the response of community metrics (e.g. diversity, density) to floods. Invertebrate composition was weakly related to connectivity, but changed predictably in response to floods. Multivariate ordinations showed that faunal composition diverged across the waterbodies during stable periods, reflecting differential species sorting across the lateral gradient, but converged again after floods. Stable hydrological periods allowed communities to assemble deterministically with prevalence of non-random beta-diversity and co-occurrence patterns and larger proportion of compositional variation explained by local abiotic features. These signals of deterministic processes declined after flooding events. This occurred despite no apparent evidence of flood-induced homogenisation of habitat conditions. This study is among the first to examine the annual dynamic of aquatic assemblages across a hydrologic connectivity gradient in a natural floodplain. Results highlight how biodiversity can exhibit complex relations with hydrologic connectivity. However, appraisal of the assembly mechanisms through time indicated that flooding shifted the balance from deterministic species sorting across floodplain habitats, towards stochastic processes related to organisms redistribution and the likely resetting of assembly to earlier stages URL Link na plný text Public work category ADM No. of Archival Copy 46680 Repercussion category BONECKER, Claudia Costa - DINIZ, Leidiane Pereira - BRAGHIN, Louizi de Souza Magalhães et al. Synergistic effects of natural and anthropogenic impacts on zooplankton diversity in a subtropical floodplain : a long-term study. In Oecologia Australis 2020-01-01, 24, 2, pp. 524-537.
MANFRIN, Alessandro - BUNZEL-DRUEKE, Margret - LORENZ, Armin W. - MAIRE, Anthony - SCHARF, Matthias - ZIMBALL, Olaf - STOLL, Stefan. The effect of lateral connectedness on the taxonomic and functional structure of fish communities in a lowland river floodplain. In Science of the total environment. ISSN 0048-9697, 2020, vol. 719, art. no. 137169.
ZHANG, Yadong - LI, Zongkun - GE, Wei - CHEN, Xudong - XU, Hongyin - GUAN, Hongyan. Evaluation of the impact of extreme floods on the biodiversity of terrestrial animals. In Science of the total environment. ISSN 0048-9697, 2021, vol. 790, art. no. 148227.
ELGUETA, Anaysa - GORSKI, Konrad - THOMS, Martin - FIERRO, Pablo - TOLEDO, Barbara - MANOSALVA, Aliro - HABIT, Evelyn. Interplay of geomorphology and hydrology drives macroinvertebrate assemblage responses to hydropeaking. In Science of the total environment. ISSN 0048-9697, 2021, vol. 768, art. no. 144262.
FERENCZ, Beata - DAWIDEK, Jaroslaw - TOPOROWSKA, Magdalena - RACZYNSKI, Krzysztof. Environmental implications of potamophases duration and concentration period in the floodplain lakes of the Bug River valley. In Science of the total environment. ISSN 0048-9697, 2020, vol. 746, art. no.141108.
PEREZ-SANCHEZ, Julio - SENENT-APARICIO, Javier - MARTINEZ SANTA-MARIA, Carolina - LOPEZ-BALLESTEROS, Adrian. Assessment of ecological and hydro-geomorphological alterations under climate change using SWAT and IAHRIS in the Eo river in Northern Spain. In Water. ISSN 2073-4441, 2020, vol. 12, no. 6, aret. no. 1745.
LIU, Xinggen - ZHANG, Qi - LI, Yunliang - TAN, Zhiqiang - WERNER, Adrian D. Satellite image-based investigation of the seasonal variations in the hydrological connectivity of a large floodplain (Poyang Lake, China). In Journal of hydrology. ISSN 0022-1694, 2020, vol. 585, art. no. 124810.
MANFRIN, Alessandro - BUNZEL-DRUEKE, Margret - LORENZ, Armin W. - MAIRE, Anthony - SCHARF, Matthias - ZIMBALL, Olaf - STOLL, Stefan. The effect of lateral connectedness on the taxonomic and functional structure of fish communities in a lowland river floodplain. In Science of the total environment. ISSN 0048-9697, 2020, vol. 719, art. no. 137169.
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