Ghent University Academic Bibliography

Advanced

Distribution and faunal richness of Cladocera in western Uganda crater lakes

Bob Rumes UGent, Hilde Eggermont UGent and Dirk Verschuren UGent (2011) HYDROBIOLOGIA. 676(1). p.39-56
abstract
In this study, we analyse the distribution and species richness of epibenthic and planktonic Cladocera (Crustacea: Branchiopoda) in 62 Uganda crater lakes, spread across the climatic gradient between the sub-humid shoulder and semi-arid floor of the East African Rift Valley. Together, these lakes cover large environmental gradients in salinity, trophic conditions and depth. In total, 36 species of Cladocera were encountered in the freshwater lakes (<1,500 mu S/cm), whereas only a single species was found in the true saline lakes (>10,000 mu S/cm). Cladoceran species richness in individual lakes was found to be determined primarily by the presence of a well-developed littoral belt of submerged and emergent aquatic macrophytes, pH and salinity. The highest species richness occurred in fresh but eutrophic shallow waters, with relatively low pH (6.5-7) and dense aquatic macrophyte growth. As identified by multivariate statistical analysis, the distribution of Cladocera species among the Uganda lakes was most strongly determined by nutrient availability (measured as total phosphorus), the presence and diversity of aquatic macrophyte habitat, pH, mean annual temperature and the fraction of the crater catchment that is currently under agriculture. Since Cladocera play an important role in aquatic food webs, and as such contribute to the ecological integrity of aquatic ecosystems, an increased understanding of the environmental controls underlying their distribution provides valuable information on aquatic ecosystem functioning needed for management and conservation. The significant turnover of cladoceran species composition along the sampled environmental gradients demonstrates their potential as biological indicators for water quality and ecosystem health in East African lakes. Our results suggest that changes in land use are the greatest threat to natural ecosystem functioning in these African lakes, and particularly so in the shallower lakes.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
ANOMOPODA, ASSEMBLAGES, RECONSTRUCTION, Aquatic macrophytes, Crustacea, East African Rift Valley, Environmental control, Habitat, Species distribution, CANONICAL CORRESPONDENCE-ANALYSIS, SHALLOW LAKES, CRUSTACEAN ZOOPLANKTON, CHYDORIDAE CRUSTACEA, COMMUNITY STRUCTURE, SURFACE SEDIMENTS, AFRICAN LAKES
journal title
HYDROBIOLOGIA
Hydrobiologia
volume
676
issue
1
pages
39 - 56
Web of Science type
Article
Web of Science id
000296739300004
JCR category
MARINE & FRESHWATER BIOLOGY
JCR impact factor
1.784 (2011)
JCR rank
38/97 (2011)
JCR quartile
2 (2011)
ISSN
0018-8158
DOI
10.1007/s10750-011-0829-7
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2308674
handle
http://hdl.handle.net/1854/LU-2308674
date created
2012-06-16 10:49:45
date last changed
2012-07-03 14:30:55
@article{2308674,
  abstract     = {In this study, we analyse the distribution and species richness of epibenthic and planktonic Cladocera (Crustacea: Branchiopoda) in 62 Uganda crater lakes, spread across the climatic gradient between the sub-humid shoulder and semi-arid floor of the East African Rift Valley. Together, these lakes cover large environmental gradients in salinity, trophic conditions and depth. In total, 36 species of Cladocera were encountered in the freshwater lakes ({\textlangle}1,500 mu S/cm), whereas only a single species was found in the true saline lakes ({\textrangle}10,000 mu S/cm). Cladoceran species richness in individual lakes was found to be determined primarily by the presence of a well-developed littoral belt of submerged and emergent aquatic macrophytes, pH and salinity. The highest species richness occurred in fresh but eutrophic shallow waters, with relatively low pH (6.5-7) and dense aquatic macrophyte growth. As identified by multivariate statistical analysis, the distribution of Cladocera species among the Uganda lakes was most strongly determined by nutrient availability (measured as total phosphorus), the presence and diversity of aquatic macrophyte habitat, pH, mean annual temperature and the fraction of the crater catchment that is currently under agriculture. Since Cladocera play an important role in aquatic food webs, and as such contribute to the ecological integrity of aquatic ecosystems, an increased understanding of the environmental controls underlying their distribution provides valuable information on aquatic ecosystem functioning needed for management and conservation. The significant turnover of cladoceran species composition along the sampled environmental gradients demonstrates their potential as biological indicators for water quality and ecosystem health in East African lakes. Our results suggest that changes in land use are the greatest threat to natural ecosystem functioning in these African lakes, and particularly so in the shallower lakes.},
  author       = {Rumes, Bob and Eggermont, Hilde and Verschuren, Dirk},
  issn         = {0018-8158},
  journal      = {HYDROBIOLOGIA},
  keyword      = {ANOMOPODA,ASSEMBLAGES,RECONSTRUCTION,Aquatic macrophytes,Crustacea,East African Rift Valley,Environmental control,Habitat,Species distribution,CANONICAL CORRESPONDENCE-ANALYSIS,SHALLOW LAKES,CRUSTACEAN ZOOPLANKTON,CHYDORIDAE CRUSTACEA,COMMUNITY STRUCTURE,SURFACE SEDIMENTS,AFRICAN LAKES},
  language     = {eng},
  number       = {1},
  pages        = {39--56},
  title        = {Distribution and faunal richness of Cladocera in western Uganda crater lakes},
  url          = {http://dx.doi.org/10.1007/s10750-011-0829-7},
  volume       = {676},
  year         = {2011},
}

Chicago
Rumes, Bob, Hilde Eggermont, and Dirk Verschuren. 2011. “Distribution and Faunal Richness of Cladocera in Western Uganda Crater Lakes.” Hydrobiologia 676 (1): 39–56.
APA
Rumes, B., Eggermont, H., & Verschuren, D. (2011). Distribution and faunal richness of Cladocera in western Uganda crater lakes. HYDROBIOLOGIA, 676(1), 39–56.
Vancouver
1.
Rumes B, Eggermont H, Verschuren D. Distribution and faunal richness of Cladocera in western Uganda crater lakes. HYDROBIOLOGIA. 2011;676(1):39–56.
MLA
Rumes, Bob, Hilde Eggermont, and Dirk Verschuren. “Distribution and Faunal Richness of Cladocera in Western Uganda Crater Lakes.” HYDROBIOLOGIA 676.1 (2011): 39–56. Print.