F
Frank Sommer
Researcher at University of Kiel
Publications - 14
Citations - 1082
Frank Sommer is an academic researcher from University of Kiel. The author has contributed to research in topics: Phytoplankton & Zooplankton. The author has an hindex of 12, co-authored 14 publications receiving 1014 citations.
Papers
More filters
Book ChapterDOI
Pelagic food web configurations at different levels of nutrient richness and their implications for the ratio fish production:primary production
TL;DR: Ecological efficiency considerations lead to the conclusion that fish production:primary production ratios should be highest in upwelling systems and substantially lower in oligotrophic and in culturally eutrophicated systems.
Journal ArticleDOI
Cladocerans versus copepods: the cause of contrasting top–down controls on freshwater and marine phytoplankton
Ulrich Sommer,Frank Sommer +1 more
TL;DR: It is argued that the difference between lake and marine trophic cascades is real and mainly caused by biological differences at the zooplankton–phytoplankon link: cladocerans (particularly Daphnia) in the lakes and copepods in the sea.
Journal ArticleDOI
Complementary impact of copepods and cladocerans on phytoplankton
Ulrich Sommer,Frank Sommer,Barbara Santer,Colleen Jamieson,Maarten Boersma,Claes Becker,Thomas F. Hansen +6 more
TL;DR: There were strong and contrasting impacts on phytoplankton size structure and on individual taxa, Contrary to expectation, neither of the two zooplankon groups significantly reduced phy Topolankton biomass.
Journal ArticleDOI
Daphnia versus copepod impact on summer phytoplankton: functional compensation at both trophic levels
Ulrich Sommer,Frank Sommer,Barbara Santer,Eckart Zöllner,Klaus Jürgens,Colleen Jamieson,Maarten Boersma,Klaus Gocke +7 more
TL;DR: Contrary to the impact of a single functional group, the combined impact of both zooplankton groups led to a substantial decline in total phytoplankon biomass.
Journal ArticleDOI
Grazing by mesozooplankton from Kiel Bight, Baltic Sea, on different sized algae and natural seston size fractions
TL;DR: It is calculated that approximately 10 and 8.5 % of the carbon ingested by total mesozooplankton was due to veliger and appendicularian grazing, and the importance of bivalve veligers might be seen in their grazing on seston particles that escape predation by copepods and on the amount of energy directed from the water column to the benthos when larvae settle.