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Intraspecific autochthonous and allochthonous resource use by zooplankton in a humic lake during the transitions between winter, summer and fall

Berggren, Martin LU ; Bergström, Ann-Kristin and Karlsson, Jan (2015) In PLoS ONE 10(3).
Abstract
Seasonal patterns in assimilation of externally produced, allochthonous, organic matter into aquatic food webs are poorly understood, especially in brown-water lakes. We studied the allochthony (share biomass of terrestrial origin) in cladoceran, calanoid and cyclopoid micro-crustacean zooplankton from late winter to fall during two years in a small humic lake (Sweden). The use of allochthonous resources was important for sustaining a small population of calanoids in the water column during late winter. However, in summer the calanoids shifted to 100% herbivory, increasing their biomass several-fold by making efficient use of the pelagic primary production. In contrast, the cyclopoids and cladocerans remained at high levels of allochthony... (More)
Seasonal patterns in assimilation of externally produced, allochthonous, organic matter into aquatic food webs are poorly understood, especially in brown-water lakes. We studied the allochthony (share biomass of terrestrial origin) in cladoceran, calanoid and cyclopoid micro-crustacean zooplankton from late winter to fall during two years in a small humic lake (Sweden). The use of allochthonous resources was important for sustaining a small population of calanoids in the water column during late winter. However, in summer the calanoids shifted to 100% herbivory, increasing their biomass several-fold by making efficient use of the pelagic primary production. In contrast, the cyclopoids and cladocerans remained at high levels of allochthony throughout the seasons, both groups showing the mean allochthony of 0.56 (range in mean 0.17-0.79 and 0.34-0.75, for the respective group, depending on model parameters). Our study shows that terrestrial organic matter can be an important resource for cyclopoids and cladocerans on an annual basis, forming a significant link between terrestrial organic matter and the higher trophic levels of the food web, but it can also be important for sustaining otherwise herbivorous calanoids during periods of low primary production in late winter. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Lakes, Phytoplankton, Zooplankton, Summer, Bacterioplankton, Winter, Isotopes, Seasons
in
PLoS ONE
volume
10
issue
3
publisher
Public Library of Science
external identifiers
  • pmid:25764501
  • wos:000351276300044
  • scopus:84928914586
ISSN
1932-6203
DOI
10.1371/journal.pone.0120575
language
English
LU publication?
yes
id
4e389e73-448d-4081-9f5a-89254e024ba5 (old id 5155759)
date added to LUP
2015-03-18 14:15:44
date last changed
2017-09-10 04:12:26
@article{4e389e73-448d-4081-9f5a-89254e024ba5,
  abstract     = {Seasonal patterns in assimilation of externally produced, allochthonous, organic matter into aquatic food webs are poorly understood, especially in brown-water lakes. We studied the allochthony (share biomass of terrestrial origin) in cladoceran, calanoid and cyclopoid micro-crustacean zooplankton from late winter to fall during two years in a small humic lake (Sweden). The use of allochthonous resources was important for sustaining a small population of calanoids in the water column during late winter. However, in summer the calanoids shifted to 100% herbivory, increasing their biomass several-fold by making efficient use of the pelagic primary production. In contrast, the cyclopoids and cladocerans remained at high levels of allochthony throughout the seasons, both groups showing the mean allochthony of 0.56 (range in mean 0.17-0.79 and 0.34-0.75, for the respective group, depending on model parameters). Our study shows that terrestrial organic matter can be an important resource for cyclopoids and cladocerans on an annual basis, forming a significant link between terrestrial organic matter and the higher trophic levels of the food web, but it can also be important for sustaining otherwise herbivorous calanoids during periods of low primary production in late winter.},
  articleno    = {e0120575},
  author       = {Berggren, Martin and Bergström, Ann-Kristin and Karlsson, Jan},
  issn         = {1932-6203},
  keyword      = {Lakes,Phytoplankton,Zooplankton,Summer,Bacterioplankton,Winter,Isotopes,Seasons},
  language     = {eng},
  number       = {3},
  publisher    = {Public Library of Science},
  series       = {PLoS ONE},
  title        = {Intraspecific autochthonous and allochthonous resource use by zooplankton in a humic lake during the transitions between winter, summer and fall},
  url          = {http://dx.doi.org/10.1371/journal.pone.0120575},
  volume       = {10},
  year         = {2015},
}