Synergistic and species-specific effects of climate change and water colour on cyanobacterial toxicity and bloom formation
Ekvall, Mattias LU ; Martin, Javier de la Calle ; Faassen, Elisabeth J. ; Gustafsson, Susanne LU ; Lurling, Miquel and Hansson, Lars-Anders LU
(2013)
In Freshwater Biology
58(11).
p.2414-2422
- Abstract
- Cyanobacterial blooms are a worldwide phenomenon in both marine and freshwater ecosystems and are predicted to occur more frequently due to global climate change. However, our future water resources may also simultaneously suffer from other environmental threats such as elevated amounts of humic content and consequent increased water colour, a phenomenon called brownification'. In order to investigate the effects of temperature and water colour in combination, we performed a mesocosm experiment combining a 3 degrees C increase in temperature and a doubling in water colour. With this, we created a projected future scenario for our water resources, and we specifically focused on how these changes would affect cyanobacterial bloom formation... (More)
- Cyanobacterial blooms are a worldwide phenomenon in both marine and freshwater ecosystems and are predicted to occur more frequently due to global climate change. However, our future water resources may also simultaneously suffer from other environmental threats such as elevated amounts of humic content and consequent increased water colour, a phenomenon called brownification'. In order to investigate the effects of temperature and water colour in combination, we performed a mesocosm experiment combining a 3 degrees C increase in temperature and a doubling in water colour. With this, we created a projected future scenario for our water resources, and we specifically focused on how these changes would affect cyanobacterial bloom formation and toxicity. We showed that despite total cyanobacterial biomass remaining unaffected, the abundance of one individual cyanobacterial species, Microcystis botrys, increased in response to the combination of elevated temperature and increased water colour. Furthermore, population fluctuations in M.botrys explained the majority of the variations in microcystin concentrations, suggesting that this species was responsible for the more than 300% higher microcystin concentrations in the future scenario treatment compared to the ambient scenario. Hence, it was not a change in cyanobacterial biomass, but rather a species-specific response that had the most profound impact on bloom toxicity. We argue that understanding such species-specific responses to multiple stressors is crucial for proper management decisions because toxic blooms can significantly affect both biodiversity and ecosystem functioning, as well as ecosystem services such as drinking water supply and recreation. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4171781
- author
- Ekvall, Mattias
LU
; Martin, Javier de la Calle
; Faassen, Elisabeth J.
; Gustafsson, Susanne
LU
; Lurling, Miquel
and Hansson, Lars-Anders
LU
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- climate change, cyanobacteria, microcystin, temperature, water colour, water quality
- in
- Freshwater Biology
- volume
- 58
- issue
- 11
- pages
- 2414 - 2422
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000325156400018
- scopus:84884912731
- ISSN
- 0046-5070
- DOI
- 10.1111/fwb.12220
- language
- English
- LU publication?
- yes
- id
- e9930f12-fe54-42b2-a3c8-91087384c86d (old id 4171781)
- date added to LUP
- 2016-04-01 13:19:22
- date last changed
- 2022-01-27 18:30:00
@article{e9930f12-fe54-42b2-a3c8-91087384c86d,
abstract = {{Cyanobacterial blooms are a worldwide phenomenon in both marine and freshwater ecosystems and are predicted to occur more frequently due to global climate change. However, our future water resources may also simultaneously suffer from other environmental threats such as elevated amounts of humic content and consequent increased water colour, a phenomenon called brownification'. In order to investigate the effects of temperature and water colour in combination, we performed a mesocosm experiment combining a 3 degrees C increase in temperature and a doubling in water colour. With this, we created a projected future scenario for our water resources, and we specifically focused on how these changes would affect cyanobacterial bloom formation and toxicity. We showed that despite total cyanobacterial biomass remaining unaffected, the abundance of one individual cyanobacterial species, Microcystis botrys, increased in response to the combination of elevated temperature and increased water colour. Furthermore, population fluctuations in M.botrys explained the majority of the variations in microcystin concentrations, suggesting that this species was responsible for the more than 300% higher microcystin concentrations in the future scenario treatment compared to the ambient scenario. Hence, it was not a change in cyanobacterial biomass, but rather a species-specific response that had the most profound impact on bloom toxicity. We argue that understanding such species-specific responses to multiple stressors is crucial for proper management decisions because toxic blooms can significantly affect both biodiversity and ecosystem functioning, as well as ecosystem services such as drinking water supply and recreation.}},
author = {{Ekvall, Mattias and Martin, Javier de la Calle and Faassen, Elisabeth J. and Gustafsson, Susanne and Lurling, Miquel and Hansson, Lars-Anders}},
issn = {{0046-5070}},
keywords = {{climate change; cyanobacteria; microcystin; temperature; water colour; water quality}},
language = {{eng}},
number = {{11}},
pages = {{2414--2422}},
publisher = {{Wiley-Blackwell}},
series = {{Freshwater Biology}},
title = {{Synergistic and species-specific effects of climate change and water colour on cyanobacterial toxicity and bloom formation}},
url = {{http://dx.doi.org/10.1111/fwb.12220}},
doi = {{10.1111/fwb.12220}},
volume = {{58}},
year = {{2013}},
}