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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Uncovering hidden species: Hatching diapausing eggs for the analysis of cladoceran species richness
Limnology and Oceanography: Methods, Volume 3, No. 9, Year 2005
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Description
Effective methods for the detection of species are highly needed in biodiversity research. The assessment of richness is especially difficult for short-lived aquatic organisms, like plankton. Because of the high degree of spatial and temporal variation in plankton community composition, the compilation of complete plankton species lists requires intensive sampling programs. Many large-scale studies on planktonic organisms are based on single occasion samplings and inevitably fail to detect a substantial fraction of the species. In the present study, we assessed species richness of Cladocera (Branchiopoda, Crustacea) in 88 European lakes by repeated sampling of the active communities and by an alternative method based on the hatching of diapausing eggs from the lake sediments. Identification of hatchlings obtained from egg bank samples enabled the detection of about twice as many cladoceran species than identification of an equal number of individuals retrieved from active community samples. Loglinear analyses revealed a strong species by method interaction, suggesting that both methods are highly complementary and should preferably be applied in combination. Some species were underrepresented in the active community samples, probably because of the lack of spatial and temporal integration in these samples. Other species were underrepresented in the hatching assemblages as a result of species-specific propensities to produce diapausing eggs or hatch from such eggs. © 2005, by the American Society of Limnology and Oceanography, Inc.
Authors & Co-Authors
Declerck, Steven A.J.
Belgium, Leuven
Ku Leuven
Brendonck, Luc
Belgium, Leuven
Ku Leuven
Jeppesen, Erik
Denmark, Silkeborg
National Environmental Research Institute
Denmark, Aarhus
Aarhus Universitet
Johansson, Liselotte Sander
Denmark, Silkeborg
National Environmental Research Institute
de Meester, Luc
Belgium, Leuven
Ku Leuven
Statistics
Citations: 58
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.4319/lom.2005.3.399
ISSN:
15415856