Opin vísindi

Midge-stabilized sediment drives the composition of benthic cladoceran communities in Lake Mývatn, Iceland

Show simple item record

dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Webert, Kyle C.
dc.contributor.author Herren, Cristina M.
dc.contributor.author Einarsson, Árni
dc.contributor.author Bartrons, Mireia
dc.contributor.author Hauptfleisch, Ulf
dc.contributor.author Ives, Anthony R.
dc.date.accessioned 2017-05-24T15:03:20Z
dc.date.available 2017-05-24T15:03:20Z
dc.date.issued 2017-02
dc.identifier.citation Webert, K. C., C. M. Herren, Á. Einarsson, M. Bartrons, U. Hauptfleisch, and A. R. Ives. 2017. Midge-stabilized sediment drives the composition of benthic cladoceran communities in Lake Mývatn, Iceland. Ecosphere 8(2):e01659. 10.1002/ecs2.1659
dc.identifier.issn 2150-8925
dc.identifier.uri https://hdl.handle.net/20.500.11815/279
dc.description.abstract The importance of environmental disturbances as drivers of ecological communities depends not only on the magnitude of the disturbance, but also on the disturbance-specific sensitivity of the community. Organisms that alter the physical structure of their surroundings can affect the sensitivity of their habitat to environmental disturbance, and may alter the potential for disturbance to shape ecological communities. Such organisms therefore act as ecosystem engineers by indirectly modifying the resources available to other species. The benthos of shallow, eutrophic Lake Mývatn, Iceland, is frequently disturbed by wind events that lead to sediment resuspension. The impact of wind, however, depends on the abundance of midges (Chironomidae) whose larval tubes bind sediment and reduce wind-driven resuspension. Here, we investigate the long-term effect of fluctuations in midge abundance on the benthic cladoceran community using two lake sediment cores representing 30 and 140 years of deposition. In both cores, midge remains show a significant positive correlation with abundance of a large benthic surface-dwelling cladoceran, Eurycercus lamellatus, relative to the abundance of a small within-sediment-dwelling cladoceran, Alona rectangula. To experimentally investigate whether this shift could have been caused by midges acting as ecosystem engineers, we subjected cladoceran communities to sediment resuspension events within mesocosms. We found a significant decrease in abundance of the large epibenthic E. lamellatus relative to the abundance of small infaunal Alona spp. when subjected to disturbance. These findings show that physical alteration of benthic sediment and hence the sensitivity of the sediment to disturbance may explain the community shift in cladocerans observed with fluctuating midge abundance in Lake Mývatn.
dc.description.sponsorship National Science Foundation Graduate Research Fellowship. Grant Number: DGE-1256259 LTREB. Grant Number: DEB-1052160
dc.format.extent e01659
dc.language.iso en
dc.publisher Wiley-Blackwell
dc.relation.ispartofseries Ecosphere;8(2)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Benthic cladoceran
dc.subject Chironomid
dc.subject Disturbance
dc.subject Ecosystem engineer
dc.subject Mývatn
dc.subject Mýflugur
dc.subject Rykmý
dc.subject Vistkerfi
dc.subject Umhverfisáhrif
dc.title Midge-stabilized sediment drives the composition of benthic cladoceran communities in Lake Mývatn, Iceland
dc.type info:eu-repo/semantics/article
dcterms.license This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
dc.description.version Peer Reviewed
dc.identifier.journal Ecosphere
dc.identifier.doi 10.1002/ecs2.1659
dc.relation.url http://onlinelibrary.wiley.com/doi/10.1002/ecs2.1659/abstract;jsessionid=818AAC5D79630ACD40B489FF7D11E43A.f04t03
dc.contributor.department Náttúrurannsóknastöðin við Mývatn (HÍ)
dc.contributor.department Mývatn Research Station (UI)
dc.contributor.department Líf- og umhverfisvísindadeild (HÍ)
dc.contributor.department Faculty of Life and Environmental Sciences (UI)
dc.contributor.department Jarðvísindadeild (HÍ)
dc.contributor.department Faculty of Earth Sciences (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

Files in this item

This item appears in the following Collection(s)

Show simple item record