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Experimental evidence for a mismatch between insect emergence and waterfowl hatching under increased spring temperatures

Hansson, Lars-Anders LU ; Ekvall, Mattias LU ; Ekvall, Mikael LU ; Ahlgren, Johan LU ; Sidemo Holm, William LU ; Dessborn, Lisa and Brönmark, Christer LU (2014) In Ecosphere 5(9). p.120-120
Abstract
By combining a large-scale experimental assessment on timing of insect emergence with long-term monitoring of waterfowl hatching date, we here show that insect emergence is mainly driven by temperature, whereas there is only a weak effect of increasing spring temperatures on inter-annual variability in observations of waterfowl chicks. Hence, a change in timing of the mass-emergence of insects from lakes and wetlands, which is the crucial food source for waterfowl chicks, will likely result in a consumer/resource mismatch in a future climate change perspective. Specifically, we experimentally show that a moderate increase in temperature of 3 degrees C above ambient, expected to occur within 25-75 years, leads to a considerably (2 weeks)... (More)
By combining a large-scale experimental assessment on timing of insect emergence with long-term monitoring of waterfowl hatching date, we here show that insect emergence is mainly driven by temperature, whereas there is only a weak effect of increasing spring temperatures on inter-annual variability in observations of waterfowl chicks. Hence, a change in timing of the mass-emergence of insects from lakes and wetlands, which is the crucial food source for waterfowl chicks, will likely result in a consumer/resource mismatch in a future climate change perspective. Specifically, we experimentally show that a moderate increase in temperature of 3 degrees C above ambient, expected to occur within 25-75 years, leads to a considerably (2 weeks) earlier, and more pronounced, peak in insect emergence (Chironomus sp). Moreover, by utilizing long-term Citizen Science databases, ranging over several decades, we also show that common waterfowl species are unable to significantly adjust their reproduction to fit future temperature increase. Hence, based on our data we predict a future mismatch between insect emergence and waterfowl species basing their reproduction on temperature. This will have a profound impact on reproductive success and population dynamics of many aquatic birds, as well as on freshwater biodiversity. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Chironomus, citizen science, climate change, crowd sourcing, hatching, insect emergence, mismatch, waterfowl
in
Ecosphere
volume
5
issue
9
pages
120 - 120
publisher
Ecological Society of America
external identifiers
  • wos:000345097000017
  • scopus:84919720925
ISSN
0046-1237
DOI
10.1890/ES14-00133.1
language
English
LU publication?
yes
id
e4fccf6b-1d78-4996-a285-6b609309cae1 (old id 4985664)
date added to LUP
2015-01-26 14:03:34
date last changed
2017-08-13 04:07:02
@article{e4fccf6b-1d78-4996-a285-6b609309cae1,
  abstract     = {By combining a large-scale experimental assessment on timing of insect emergence with long-term monitoring of waterfowl hatching date, we here show that insect emergence is mainly driven by temperature, whereas there is only a weak effect of increasing spring temperatures on inter-annual variability in observations of waterfowl chicks. Hence, a change in timing of the mass-emergence of insects from lakes and wetlands, which is the crucial food source for waterfowl chicks, will likely result in a consumer/resource mismatch in a future climate change perspective. Specifically, we experimentally show that a moderate increase in temperature of 3 degrees C above ambient, expected to occur within 25-75 years, leads to a considerably (2 weeks) earlier, and more pronounced, peak in insect emergence (Chironomus sp). Moreover, by utilizing long-term Citizen Science databases, ranging over several decades, we also show that common waterfowl species are unable to significantly adjust their reproduction to fit future temperature increase. Hence, based on our data we predict a future mismatch between insect emergence and waterfowl species basing their reproduction on temperature. This will have a profound impact on reproductive success and population dynamics of many aquatic birds, as well as on freshwater biodiversity.},
  author       = {Hansson, Lars-Anders and Ekvall, Mattias and Ekvall, Mikael and Ahlgren, Johan and Sidemo Holm, William and Dessborn, Lisa and Brönmark, Christer},
  issn         = {0046-1237},
  keyword      = {Chironomus,citizen science,climate change,crowd sourcing,hatching,insect emergence,mismatch,waterfowl},
  language     = {eng},
  number       = {9},
  pages        = {120--120},
  publisher    = {Ecological Society of America},
  series       = {Ecosphere},
  title        = {Experimental evidence for a mismatch between insect emergence and waterfowl hatching under increased spring temperatures},
  url          = {http://dx.doi.org/10.1890/ES14-00133.1},
  volume       = {5},
  year         = {2014},
}