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Distribution and diel migration of macroinvertebrates within dense submerged vegetation

Marklund, Ola LU ; Blindow, I and Hargeby, Anders LU (2001) In Freshwater Biology 46(7). p.913-924
Abstract
1. We studied vertical and horizontal distribution of macroinvertebrates within a dense stand of Chara spp. in Lake Krankesjon, southern Sweden. Invertebrates were sampled at three depths within the vegetation and at three distances from the vegetation edge during day and night in July and August. Corresponding samples of oxygen content of the water were taken. 2. The densities (number of invertebrates per unit plant biomass) of most invertebrate taxa were generally lower in the upper layers of the vegetation than in the layers close to the sediment. The densities of several taxa. (Asellus aquaticus, Cloeon sp. and Polycentropodidae), as well as total density of invertebrates, were higher at the edge than in the innermost parts of the... (More)
1. We studied vertical and horizontal distribution of macroinvertebrates within a dense stand of Chara spp. in Lake Krankesjon, southern Sweden. Invertebrates were sampled at three depths within the vegetation and at three distances from the vegetation edge during day and night in July and August. Corresponding samples of oxygen content of the water were taken. 2. The densities (number of invertebrates per unit plant biomass) of most invertebrate taxa were generally lower in the upper layers of the vegetation than in the layers close to the sediment. The densities of several taxa. (Asellus aquaticus, Cloeon sp. and Polycentropodidae), as well as total density of invertebrates, were higher at the edge than in the innermost parts of the macrophyte stand, whereas snail densities generally were highest at the innermost sites. 3. Densities of A. aquaticus, Chironomidae larvae and Helobdella stagnalis generally increased at night. These taxa. appear to undertake a diel vertical migration within the vegetation, towards, or even down to the sediment in daytime and up into the vegetation, in some cases to the vegetation surface, at night. Factors underlying the diel vertical migration are discussed, as are their ecological consequences. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Freshwater Biology
volume
46
issue
7
pages
913 - 924
publisher
Wiley-Blackwell
external identifiers
  • scopus:0034919641
ISSN
0046-5070
DOI
10.1046/j.1365-2427.2001.00726.x
language
English
LU publication?
yes
id
0c06b253-ae8e-41c6-bd61-e24ef39aa40a (old id 146633)
date added to LUP
2007-06-28 14:35:58
date last changed
2018-02-18 03:49:44
@article{0c06b253-ae8e-41c6-bd61-e24ef39aa40a,
  abstract     = {1. We studied vertical and horizontal distribution of macroinvertebrates within a dense stand of Chara spp. in Lake Krankesjon, southern Sweden. Invertebrates were sampled at three depths within the vegetation and at three distances from the vegetation edge during day and night in July and August. Corresponding samples of oxygen content of the water were taken. 2. The densities (number of invertebrates per unit plant biomass) of most invertebrate taxa were generally lower in the upper layers of the vegetation than in the layers close to the sediment. The densities of several taxa. (Asellus aquaticus, Cloeon sp. and Polycentropodidae), as well as total density of invertebrates, were higher at the edge than in the innermost parts of the macrophyte stand, whereas snail densities generally were highest at the innermost sites. 3. Densities of A. aquaticus, Chironomidae larvae and Helobdella stagnalis generally increased at night. These taxa. appear to undertake a diel vertical migration within the vegetation, towards, or even down to the sediment in daytime and up into the vegetation, in some cases to the vegetation surface, at night. Factors underlying the diel vertical migration are discussed, as are their ecological consequences.},
  author       = {Marklund, Ola and Blindow, I and Hargeby, Anders},
  issn         = {0046-5070},
  language     = {eng},
  number       = {7},
  pages        = {913--924},
  publisher    = {Wiley-Blackwell},
  series       = {Freshwater Biology},
  title        = {Distribution and diel migration of macroinvertebrates within dense submerged vegetation},
  url          = {http://dx.doi.org/10.1046/j.1365-2427.2001.00726.x},
  volume       = {46},
  year         = {2001},
}