Home About Browse Search
Svenska


Phytoplankton size- and abundance-based resilience assessments reveal nutrient rather than water level effects

Ludovic Baho, Didier and Drakare, Stina and Johnson, Richard and Angeler, David (2020). Phytoplankton size- and abundance-based resilience assessments reveal nutrient rather than water level effects. Science of the Total Environment. 746 , 141110 , 1-9
[Journal article]

[img] PDF
1MB

Abstract

The use of discontinuity analysis to assess resilience and alternative regimes of ecosystems has mostly been based on animal size. We so far lack systematic comparisons of size-based and abundance-based approaches necessary for assessing the performance and suitability of the discontinuity analysis across a broader range of organism groups. We used an outdoor mesocosm setup to mimic shallow lake ecosystems with different depths (1.2 m deep, “shallow”; 2.2 m deep, “deep”) and trophic status (i.e. low and high nutrient status characteristic of mesotrophic and hypertrophic lakes, respectively). We compared resilience assessments, based on four indicators (cross-scale structure, within-scale structure, aggregation length and gap size) inferred from the size and abundance (biovolume) structure of phytoplankton communities. Our results indicate that resilience assessments based on size and biovolume were largely comparable, which is likely related to similar variability in the size and abundance of phytoplankton as a function of nutrient concentrations. Also, nutrient enrichment rather than water depth influenced resilience, manifested in decreased cross-scale structure and increased aggregation lengths and gap sizes in the high-nutrient treatment. These resilience patterns coupled with decreased phytoplankton diversity and dominance of cyanobacteria in the high nutrient treatment support the use of discontinuity analysis for testing alternative regimes theory. Concordance of size-based and abundance-based results highlights the approach as being potentially robust to infer resilience in organism groups that lack discrete size structures.

Authors/Creators:Ludovic Baho, Didier and Drakare, Stina and Johnson, Richard and Angeler, David
Title:Phytoplankton size- and abundance-based resilience assessments reveal nutrient rather than water level effects
Year of publishing :2020
Volume:746
Article number:141110
Number of Pages:9
Publisher:Elsevier
ISSN:0048-9697
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Quantifying resilience, Phytoplankton communities, Eutrophication, Water depth, Alternative regimes, Discontinuity analysis
URN:NBN:urn:nbn:se:slu:epsilon-p-107359
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107359
Additional ID:
Type of IDID
DOI10.1016/j.scitotenv.2020.141110
ID Code:17530
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:05 Oct 2020 06:05
Metadata Last Modified:05 Oct 2020 06:05

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits