Lake microbial communities are not resistant or resilient to repeated large-scale natural pulse disturbances.

Show simple item record Brasell, Katie A Howarth, Jamie Pearman, John K Fitzsimons, Sean J Zaiko, Anastasija Pochon, Xavier Vandergoes, Marcus J Simon, Kevin S Wood, Susanna A
dc.coverage.spatial England 2022-09-18T23:14:47Z 2022-09-18T23:14:47Z 2021-10
dc.identifier.citation (2021). Molecular Ecology, 30(20), 5137-5150.
dc.identifier.issn 0962-1083
dc.description.abstract Opportunities to study community-level responses to extreme natural pulse disturbances in unaltered ecosystems are rare. Lake sediment records that span thousands of years can contain well-resolved sediment pulses, triggered by earthquakes. These palaeorecords provide a means to study repeated pulse disturbances and processes of resistance (insensitivity to disturbance) and ecological resilience (capacity to regain structure, function and process). In this study, sedimentary DNA was extracted from a sediment core from Lake Paringa (New Zealand) that is situated in a near natural catchment. Metabarcoding and inferred functions were used to assess the lake microbial community over the past 1100 years - a period that included four major earthquakes. Microbial community composition and function differed significantly between highly perturbed (postseismic, ~50 years) phases directly after the earthquakes and more stable (interseismic, ~250 years) phases, indicating a lack of community resistance. Although community structure differed significantly in successive postseismic phases, function did not, suggesting potential functional redundancy. Significant differences in composition and function in successive interseismic phases demonstrate that communities are not resilient to large-scale natural pulse disturbances. The clear difference in structure and function, and high number of indicator taxa (responsible for driving differences in communities between phases) in the fourth interseismic phase probably represents a regime shift, possibly due to the two-fold increase in sediment and terrestrial biospheric organic carbon fluxes recorded following the fourth earthquake. Large pulse disturbances that enhance sediment inputs into lake systems may produce an underappreciated mechanism that destabilises lake ecosystem processes.
dc.format.medium Print-Electronic
dc.language eng
dc.publisher Wiley
dc.relation.ispartofseries Molecular ecology
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher.
dc.subject Ecosystem
dc.subject New Zealand
dc.subject Carbon Cycle
dc.subject Lakes
dc.subject Microbiota
dc.subject metabarcoding
dc.subject natural disturbance
dc.subject palaeolimnology
dc.subject pulse disturbance
dc.subject resilience
dc.subject resistance
dc.subject sedimentary DNA
dc.subject Science & Technology
dc.subject Life Sciences & Biomedicine
dc.subject Biochemistry & Molecular Biology
dc.subject Ecology
dc.subject Evolutionary Biology
dc.subject Environmental Sciences & Ecology
dc.subject ALPINE FAULT
dc.subject REGIME SHIFTS
dc.subject SEQUENCE DATA
dc.subject DYNAMICS
dc.subject DIVERSITY
dc.subject SEDIMENTS
dc.subject RECORD
dc.subject 06 Biological Sciences
dc.title Lake microbial communities are not resistant or resilient to repeated large-scale natural pulse disturbances.
dc.type Journal Article
dc.identifier.doi 10.1111/mec.16110
pubs.issue 20
pubs.begin-page 5137
pubs.volume 30 2022-08-13T06:48:39Z
dc.rights.holder Copyright: The authors en
dc.identifier.pmid 34379827 (pubmed)
pubs.end-page 5150
pubs.publication-status Published
dc.rights.accessrights en
pubs.subtype Research Support, Non-U.S. Gov't
pubs.subtype Journal Article
pubs.elements-id 863795 Science School of Environment Marine Science
dc.identifier.eissn 1365-294X
pubs.record-created-at-source-date 2022-08-13 2021-08-22

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