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Different climate scenarios alter dominance patterns among aquatic primary producers in temperate systems

Hansson, Lars Anders LU ; Ekvall, Mattias K. LU ; He, Liang ; Li, Zhongqiang ; Svensson, Marie LU ; Urrutia-Cordero, Pablo LU and Zhang, Huan LU (2020) In Limnology and Oceanography 65(10). p.2328-2336
Abstract

In a future climate change perspective, the interactions among different life-forms of primary producers will likely be altered, leading to changes in the relative dominance among macrophytes, filamentous, and planktonic algae. In order to improve the possibilities to forecast future ecosystem services and function, we therefore conducted a long-term mesocosm study where primary producers were exposed to different climate scenarios, including both a mean increase in temperature (4°C) and a similar energy input, but delivered as “heat waves” (fluctuations 0–8°C above ambient). We show that in shallow systems, future climate change scenarios will likely lead to higher total macrophyte biomasses, but also to considerable alterations in the... (More)

In a future climate change perspective, the interactions among different life-forms of primary producers will likely be altered, leading to changes in the relative dominance among macrophytes, filamentous, and planktonic algae. In order to improve the possibilities to forecast future ecosystem services and function, we therefore conducted a long-term mesocosm study where primary producers were exposed to different climate scenarios, including both a mean increase in temperature (4°C) and a similar energy input, but delivered as “heat waves” (fluctuations 0–8°C above ambient). We show that in shallow systems, future climate change scenarios will likely lead to higher total macrophyte biomasses, but also to considerable alterations in the macrophyte community composition. The biomass of filamentous algae (Cladophora) showed no significant difference among treatments, although effect size analyses identified a slight increase at heated conditions. We also show that future climate change will not necessarily lead to more phytoplankton blooms, although a considerable alteration in phytoplankton community composition is to be expected, with a dominance of cyanobacteria and Cryptophytes, whereas Chlorophyceae and diatoms will likely play a less pronounced role than at present. In a broader context, we conclude that the total biomass of macrophytes will likely increase in shallow areas, whereas phytoplankton may not show any strong changes in biomass in a future climate change scenario. Instead, the major changes among primary producers will likely be mirrored in a considerably different species composition than at present.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Limnology and Oceanography
volume
65
issue
10
pages
9 pages
publisher
ASLO
external identifiers
  • scopus:85083792243
ISSN
1939-5590
DOI
10.1002/lno.11455
language
English
LU publication?
yes
id
786573dc-011e-4455-9af5-657ce99c74a0
date added to LUP
2020-05-28 11:23:25
date last changed
2021-01-27 15:57:05
@article{786573dc-011e-4455-9af5-657ce99c74a0,
  abstract     = {<p>In a future climate change perspective, the interactions among different life-forms of primary producers will likely be altered, leading to changes in the relative dominance among macrophytes, filamentous, and planktonic algae. In order to improve the possibilities to forecast future ecosystem services and function, we therefore conducted a long-term mesocosm study where primary producers were exposed to different climate scenarios, including both a mean increase in temperature (4°C) and a similar energy input, but delivered as “heat waves” (fluctuations 0–8°C above ambient). We show that in shallow systems, future climate change scenarios will likely lead to higher total macrophyte biomasses, but also to considerable alterations in the macrophyte community composition. The biomass of filamentous algae (Cladophora) showed no significant difference among treatments, although effect size analyses identified a slight increase at heated conditions. We also show that future climate change will not necessarily lead to more phytoplankton blooms, although a considerable alteration in phytoplankton community composition is to be expected, with a dominance of cyanobacteria and Cryptophytes, whereas Chlorophyceae and diatoms will likely play a less pronounced role than at present. In a broader context, we conclude that the total biomass of macrophytes will likely increase in shallow areas, whereas phytoplankton may not show any strong changes in biomass in a future climate change scenario. Instead, the major changes among primary producers will likely be mirrored in a considerably different species composition than at present.</p>},
  author       = {Hansson, Lars Anders and Ekvall, Mattias K. and He, Liang and Li, Zhongqiang and Svensson, Marie and Urrutia-Cordero, Pablo and Zhang, Huan},
  issn         = {1939-5590},
  language     = {eng},
  number       = {10},
  pages        = {2328--2336},
  publisher    = {ASLO},
  series       = {Limnology and Oceanography},
  title        = {Different climate scenarios alter dominance patterns among aquatic primary producers in temperate systems},
  url          = {http://dx.doi.org/10.1002/lno.11455},
  doi          = {10.1002/lno.11455},
  volume       = {65},
  year         = {2020},
}