Fish manipulation as a lake restoration tool in shallow, eutrophic temperate lakes 1: cross-analysis of three Danish case-studies
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Fish manipulation as a lake restoration tool in shallow, eutrophic temperate lakes 1 : cross-analysis of three Danish case-studies. / Jeppesen, E.; Søndergaard, M.; Mortensen, E.; Kristensen, P.; Riemann, B.; Jensen, H. J.; Müller, J. P.; Sortkjær, O.; Jensen, J. P.; Christoffersen, K.; Bosselmann, S.; Dall, E.
In: Hydrobiologia, Vol. 200-201, No. 1, 08.1990, p. 205-218.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Fish manipulation as a lake restoration tool in shallow, eutrophic temperate lakes 1
T2 - cross-analysis of three Danish case-studies
AU - Jeppesen, E.
AU - Søndergaard, M.
AU - Mortensen, E.
AU - Kristensen, P.
AU - Riemann, B.
AU - Jensen, H. J.
AU - Müller, J. P.
AU - Sortkjær, O.
AU - Jensen, J. P.
AU - Christoffersen, K.
AU - Bosselmann, S.
AU - Dall, E.
PY - 1990/8
Y1 - 1990/8
N2 - The use of fish manipulation as a tool for lake restoration in eutrophic lakes has been investigated since 1986 in three shallow, eutrophic Danish lakes. The lakes differ with respect to nutrient loading and nutrient levels (130-1000 μg P l-1, 1-6 mg N l-1). A 50% removal of planktivorous fish in the less eutrophic cyanobacteria-diatom dominated Lake Væng caused marked changes in lower trophic levels, phosphorus concentration and transparency. Only minor changes occurred after a 78% removal of planktivorous fish in eutrophic cyanobacteria dominated Frederiksborg Castle Lake. In the hypertrophic, green algae dominated Lake Søbygård a low recruitment of all fish species and a 16% removal of fish biomass created substantial changes in trophic structure, but no decrease in phosphorus concentration. The different response pattern is interpreted as (1) a difference in density and persistence of bloomforming cyanobacteria caused by between-lake variations in nutrient levels and probably also mixing- and flushing rates, (2) a difference in specific loss rates through sedimentation of the algal community prevaling after the fish manipulation, (3) a decreased impact of planktivorous fish with increasing mean depth and (4) a lake specific difference in ability to create a self-increasing reduction in the phosphorus level in the lake water. This in turn seems related to the phosphorus loading.
AB - The use of fish manipulation as a tool for lake restoration in eutrophic lakes has been investigated since 1986 in three shallow, eutrophic Danish lakes. The lakes differ with respect to nutrient loading and nutrient levels (130-1000 μg P l-1, 1-6 mg N l-1). A 50% removal of planktivorous fish in the less eutrophic cyanobacteria-diatom dominated Lake Væng caused marked changes in lower trophic levels, phosphorus concentration and transparency. Only minor changes occurred after a 78% removal of planktivorous fish in eutrophic cyanobacteria dominated Frederiksborg Castle Lake. In the hypertrophic, green algae dominated Lake Søbygård a low recruitment of all fish species and a 16% removal of fish biomass created substantial changes in trophic structure, but no decrease in phosphorus concentration. The different response pattern is interpreted as (1) a difference in density and persistence of bloomforming cyanobacteria caused by between-lake variations in nutrient levels and probably also mixing- and flushing rates, (2) a difference in specific loss rates through sedimentation of the algal community prevaling after the fish manipulation, (3) a decreased impact of planktivorous fish with increasing mean depth and (4) a lake specific difference in ability to create a self-increasing reduction in the phosphorus level in the lake water. This in turn seems related to the phosphorus loading.
KW - biomanipulation
KW - cross-analysis
KW - eutrophic
KW - lake restoration
KW - lakes
KW - shallow
KW - trophic cascade
UR - http://www.scopus.com/inward/record.url?scp=0025603913&partnerID=8YFLogxK
U2 - 10.1007/BF02530340
DO - 10.1007/BF02530340
M3 - Journal article
AN - SCOPUS:0025603913
VL - 200-201
SP - 205
EP - 218
JO - Journal of Aquatic Ecosystem Health
JF - Journal of Aquatic Ecosystem Health
SN - 0018-8158
IS - 1
ER -
ID: 281332703