7 Result(s)
within
Piet Spaak
Evolutionary Biology
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Article
Consumer-resource dynamics is an eco-evolutionary process in a natural plankton community
When traits affecting species interactions evolve rapidly, ecological dynamics can be altered while they occur. These eco-evolutionary dynamics have been documented repeatedly in laboratory and mesocosm experi...
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Article
Homogenization of lake cyanobacterial communities over a century of climate change and eutrophication
Human impacts on biodiversity are well recognized, but uncertainties remain regarding patterns of diversity change at different spatial and temporal scales. Changes in microbial assemblages are, in particular,...
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Article
Genetic differentiation of Baetis alpinus Pictet (Ephemeroptera: Baetidae) in fragmented alpine streams
The interpretation of low FST values as evidence of high levels of gene flow among habitat fragments may be confounded by population genetic structures that are indicative of historical rather than present-day le...
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Chapter and Conference Paper
Hybridization in the Daphnia galeata complex: are hybrids locally produced?
Within the species complex of Daphnia galeata, D. cucullata and D. hyalina various combinations of hybrids and parental taxa occur in lakes throughout Europe. Since daphnids are cyclic parthenogens and mostly rep...
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Chapter and Conference Paper
Differential behaviour and shifts in genotype composition during the beginning of a seasonal period of diel vertical migration
During the first few weeks of a recurring seasonal period of diel vertical migration in Lake Maarsseveen (The Netherlands), part of the hybrid Daphnia galeata × hyalina population migrated, while another part rem...
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Article
Temporal changes in the genetic structure of the Daphnia species complex in Tjeukemeer, with evidence for backcrossing
Temporal genetic variation was studied within the cyclic parthenogenetic Daphnia galeata-cucullata species complex in Lake Tjeukemeer (The Netherlands). During three successive years, three allozyme loci were stu...
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Chapter and Conference Paper
Cyclomorphosis as a factor explaining success of a Daphnia hybrid in Tjeukemeer
Recent studies have shown that Daphnia hybrids are intermediate to their parental species for several life history traits, and that they combine advantageous traits of the parental species, thereby decreasing the...
