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Ecosystem subsidies: Terrestrial support of aquatic food webs from C-13 addition to contrasting lakes

Carpenter, S R; Cole, J J; Pace, M L; Van de Bogert, M; Bade, D L; Bastviken, D; Gille, C M; Hodgson, J R; Kitchell, J F and Kritzberg, Emma LU (2005) In Ecology 86(10). p.2737-2750
Abstract
Whole-lake additions of dissolved inorganic C-13 were used to measure allochthony (the terrestrial contribution of organic carbon to aquatic consumers) in two unproductive lakes (Paul and Peter Lakes in 2001), a nutrient-enriched lake (Peter Lake in 2002), and a dystrophic lake (Tuesday Lake in 2002). Three kinds of dynamic models were used to estimate allochthony: a process-rich, dual-isotope flow model based on mass balances of two carbon isotopes in 12 carbon pools; simple univariate time-series models driven by observed time courses of delta(13)CO(2); and multivariate autoregression models that combined information from time series of delta(13)C in several interacting carbon pools. All three models gave similar estimates of... (More)
Whole-lake additions of dissolved inorganic C-13 were used to measure allochthony (the terrestrial contribution of organic carbon to aquatic consumers) in two unproductive lakes (Paul and Peter Lakes in 2001), a nutrient-enriched lake (Peter Lake in 2002), and a dystrophic lake (Tuesday Lake in 2002). Three kinds of dynamic models were used to estimate allochthony: a process-rich, dual-isotope flow model based on mass balances of two carbon isotopes in 12 carbon pools; simple univariate time-series models driven by observed time courses of delta(13)CO(2); and multivariate autoregression models that combined information from time series of delta(13)C in several interacting carbon pools. All three models gave similar estimates of allochthony. In the three experiments without nutrient enrichment, flows of terrestrial carbon to dissolved and particulate organic carbon, zooplankton, Chaoborus, and fishes were substantial. For example, terrestrial sources accounted for more than half the carbon flow to juvenile and adult largemouth bass, pumpkinseed sunfish, golden shiners, brook sticklebacks, and fathead minnows in the unenriched experiments. Allochthony was highest in the dystrophic lake and lowest in the nutrient-enriched lake. Nutrient enrichment of Peter Lake decreased allochthony of zooplankton from 0.34-0.48 to 0-0.12, and of fishes from 0.51-0.80 to 0.25-0.55. These experiments show that lake ecosystem carbon cycles, including carbon flows to consumers, are heavily subsidized by organic carbon from the surrounding landscape. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ecology
volume
86
issue
10
pages
2737 - 2750
publisher
Ecological Society of America
external identifiers
  • wos:000232361800019
ISSN
0012-9658
language
English
LU publication?
yes
id
0f763d22-411a-4bd6-a7ba-dc60acefa5b9 (old id 146448)
alternative location
http://www.esajournals.org/esaonline/?request=get-document&issn=0012-9658&volume=086&issue=10&page=2737
date added to LUP
2007-06-28 12:46:31
date last changed
2016-04-16 03:46:24
@article{0f763d22-411a-4bd6-a7ba-dc60acefa5b9,
  abstract     = {Whole-lake additions of dissolved inorganic C-13 were used to measure allochthony (the terrestrial contribution of organic carbon to aquatic consumers) in two unproductive lakes (Paul and Peter Lakes in 2001), a nutrient-enriched lake (Peter Lake in 2002), and a dystrophic lake (Tuesday Lake in 2002). Three kinds of dynamic models were used to estimate allochthony: a process-rich, dual-isotope flow model based on mass balances of two carbon isotopes in 12 carbon pools; simple univariate time-series models driven by observed time courses of delta(13)CO(2); and multivariate autoregression models that combined information from time series of delta(13)C in several interacting carbon pools. All three models gave similar estimates of allochthony. In the three experiments without nutrient enrichment, flows of terrestrial carbon to dissolved and particulate organic carbon, zooplankton, Chaoborus, and fishes were substantial. For example, terrestrial sources accounted for more than half the carbon flow to juvenile and adult largemouth bass, pumpkinseed sunfish, golden shiners, brook sticklebacks, and fathead minnows in the unenriched experiments. Allochthony was highest in the dystrophic lake and lowest in the nutrient-enriched lake. Nutrient enrichment of Peter Lake decreased allochthony of zooplankton from 0.34-0.48 to 0-0.12, and of fishes from 0.51-0.80 to 0.25-0.55. These experiments show that lake ecosystem carbon cycles, including carbon flows to consumers, are heavily subsidized by organic carbon from the surrounding landscape.},
  author       = {Carpenter, S R and Cole, J J and Pace, M L and Van de Bogert, M and Bade, D L and Bastviken, D and Gille, C M and Hodgson, J R and Kitchell, J F and Kritzberg, Emma},
  issn         = {0012-9658},
  language     = {eng},
  number       = {10},
  pages        = {2737--2750},
  publisher    = {Ecological Society of America},
  series       = {Ecology},
  title        = {Ecosystem subsidies: Terrestrial support of aquatic food webs from C-13 addition to contrasting lakes},
  volume       = {86},
  year         = {2005},
}