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Foraging behavior of benthic fish as an indicator of ecosystem state in shallow lakes

Persson, Anders LU and Nilsson, Erika LU (2007) In Israel Journal of Zoology 53(3-4). p.407-421
Abstract
In this paper we propose that the foraging behavior of benthic fish can be used to assess the current state of shallow lake ecosystems. Shallow lakes may display shifts between clear and turbid states, where sediment resuspension by benthivores foraging on benthic invertebrates contributes to maintaining the turbid state. We suggest that the giving-up density (GUD) of benthic fish foraging in experimental patches may provide useful information for managing shallow lake ecosystems. The rate of sediment resuspension by fish is a function of the abundance of both benthic fish and benthic invertebrates. Based on the empirical relationship between foraging behavior, habitat quality, and long-term growth prospects, and between habitat quality... (More)
In this paper we propose that the foraging behavior of benthic fish can be used to assess the current state of shallow lake ecosystems. Shallow lakes may display shifts between clear and turbid states, where sediment resuspension by benthivores foraging on benthic invertebrates contributes to maintaining the turbid state. We suggest that the giving-up density (GUD) of benthic fish foraging in experimental patches may provide useful information for managing shallow lake ecosystems. The rate of sediment resuspension by fish is a function of the abundance of both benthic fish and benthic invertebrates. Based on the empirical relationship between foraging behavior, habitat quality, and long-term growth prospects, and between habitat quality and rate of sediment resuspension, we conclude that systems should be more resistant to switches from a clear to a turbid state when (i) benthos biomass, maximum benthivore size, and giving up density are high, (ii) benthivore biomass is low, (iii) a low fraction of benthivore population is above the maximum benthivore size predicted from giving tip density, and when relative predation cost is high, estimated as the difference in GUD between risky and safe habitats. Although a first step, the methods introduced here should serve to facilitate predicting the probability of switching between ecosystem states, as well as to identify suitable abatement strategies for preventing such shifts. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
behavior, patch use, resuspension, Abramis brama, shallow lake, benthivorous fish
in
Israel Journal of Zoology
volume
53
issue
3-4
pages
407 - 421
publisher
Science from Israel - LPPLtd. PO BOX 34299, Jerusalem 91341, Israel
external identifiers
  • wos:000257257800013
  • scopus:47149113799
ISSN
0021-2210
language
English
LU publication?
yes
id
b24c08ef-9b5f-4026-96cf-4d75166195c9 (old id 1406808)
date added to LUP
2009-06-04 10:30:03
date last changed
2017-09-10 04:29:54
@article{b24c08ef-9b5f-4026-96cf-4d75166195c9,
  abstract     = {In this paper we propose that the foraging behavior of benthic fish can be used to assess the current state of shallow lake ecosystems. Shallow lakes may display shifts between clear and turbid states, where sediment resuspension by benthivores foraging on benthic invertebrates contributes to maintaining the turbid state. We suggest that the giving-up density (GUD) of benthic fish foraging in experimental patches may provide useful information for managing shallow lake ecosystems. The rate of sediment resuspension by fish is a function of the abundance of both benthic fish and benthic invertebrates. Based on the empirical relationship between foraging behavior, habitat quality, and long-term growth prospects, and between habitat quality and rate of sediment resuspension, we conclude that systems should be more resistant to switches from a clear to a turbid state when (i) benthos biomass, maximum benthivore size, and giving up density are high, (ii) benthivore biomass is low, (iii) a low fraction of benthivore population is above the maximum benthivore size predicted from giving tip density, and when relative predation cost is high, estimated as the difference in GUD between risky and safe habitats. Although a first step, the methods introduced here should serve to facilitate predicting the probability of switching between ecosystem states, as well as to identify suitable abatement strategies for preventing such shifts.},
  author       = {Persson, Anders and Nilsson, Erika},
  issn         = {0021-2210},
  keyword      = {behavior,patch use,resuspension,Abramis brama,shallow lake,benthivorous fish},
  language     = {eng},
  number       = {3-4},
  pages        = {407--421},
  publisher    = {Science from Israel - LPPLtd. PO BOX 34299, Jerusalem 91341, Israel},
  series       = {Israel Journal of Zoology},
  title        = {Foraging behavior of benthic fish as an indicator of ecosystem state in shallow lakes},
  volume       = {53},
  year         = {2007},
}