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Environmental filtering and community delineation in the streambed ecotone

Title data

Peralta-Maraver, Ignacio ; Galloway, Jason ; Posselt, Malte ; Arnon, Shai ; Reiss, Julia ; Lewandowski, Jörg ; Robertson, Anne L.:
Environmental filtering and community delineation in the streambed ecotone.
In: Scientific Reports. Vol. 8 (2018) . - Art.Nr. 15871.
ISSN 2045-2322
DOI: https://doi.org/10.1038/s41598-018-34206-z

Abstract in another language

A current controversy in ecology is whether biological communities are discrete biological entities or simply study units created for convenience; a debate that becomes even more heated when delimiting communities along ecotones. Here, we report an interdisciplinary study designed to address the interplay between environmental drivers and community ecology in a typical ecotone ecosystem: the streambed. Environmental filtering at a micro-scale determined how diversity, productivity and composition of the whole streambed assemblage varied with depth and with the direction of vertical water exchange. Biomass and production decreased with increasing depth, and were lower under upwelling than downwelling conditions. However, the rate at which biomass and production decreased with increasing depth differed significantly for different taxonomic groups. Using quantitative biocenosis analysis, we also showed that benthic and hyporheic zone assemblages (assemblages in close juxtaposition) could be clearly distinguished as discrete communities with individual integrity. Vertical hydrodynamic conditions also influenced the demarcation between both communities; the benthic community reached greater depths in downwelling than in upwelling zones.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER148504
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 26 Apr 2019 07:31
Last Modified: 26 Apr 2019 07:31
URI: https://eref.uni-bayreuth.de/id/eprint/48113