Gaedke, U. ; Ruhenstroth-Bauer, M. ; Wiegand, I. ; Tirok, K. ; Aberle-Malzahn, Nicole ; Breithaupt, Petra ; Lengfellner, Kathrin ; Wohlers, Julia ; Sommer, Ulrich:
Biotic interactions may overrule direct climate effects on spring phytoplankton dynamics .
In: Global Change Biology 16 (2010), S. 1122-1136
Stichwörter:  [FB3/EOE-N]; [FB2/BI]
[doi>10.1111/j.1365-2486.2009.02009.x]

Aberle, N. ; Hansen, Thomas ; Boettger-Schnack, Ruth ; Burmeister, Angela ; Sommer, Ulrich:
Differential routing of "new" nitrogen towards higher trophic levels within the marine food web of the Gulf of Aqaba, northern Red Sea .
In: Marine biology 157 (2010), S. 157-169
Stichwörter:  [FB3/EOE-N]; [FB2/BI]
[doi>10.1007/s00227-009-1306-y]

Javidpour, Jamileh ; Molinero, Juan Carlos ; Lehmann, Andreas ; Hansen, Thomas ; Sommer, Ulrich:
Annual assessment of the predation of Mnemiopsis leidyi in a new invaded environment, the Kiel Fjord (Western Baltic Sea): a matter of concern?
In: Journal of Plankton Research 31 (2009), Nr. 7, S. 729-738
Stichwörter:  [FB3/EOE-N]; [FB1/TM]
[doi>10.1093/plankt/fbp021]

Wohlers, Julia ; Engel, A. ; Zöllner, Eckart ; Breithaupt, Petra ; Jürgens, K. ; Hoppe, H.-G. ; Sommer, Ulrich ; Riebesell, Ulf:
Changes in biogenic carbon flow in response to sea surface warming .
In: PNAS 106 (2009), Nr. 17, S. 7067-7072
Stichwörter:  [FB2/BI]; [FB3/EOE-N]; [FB3/MI]; biological feedbacks; carbon cycle; climate change; global warming; marine
[doi>10.1073/pnas.0812743106]

Sommer, Ulrich:
Copepod growth and diatoms: insensitivity of Acartia tonsa to the composition of semi-natural plankton mixtures manipulated by silicon:nitrogen ratios in mesocosms .
In: Oecologia 159 (2009), S. 207-215
Stichwörter:  [FB3/EOE-N]; Copepods; Diatoms; Food chain; Plankton
[doi>10.1007/s00442-008-1193-9]

Zöllner, Eckart ; Hoppe, Hans-Georg ; Sommer, Ulrich ; Jürgens, K.:
Effect of zooplankton-mediated trophic cascades on marine microbial food web components (bacteria, nanoflagellates, ciliates) .
In: Limnology and Oceanography 54 (2009), S. 262-275
Stichwörter:  [FB2/BI]; [FB3/EOE-N]

Saage, Andrea ; Vadstein, O. ; Sommer, Ulrich:
Feeding behaviour of adult Centropages hamatus (Copepoda, Calanoida): Functional response and selective feeding experiments .
In: Journal of Sea Research 62 (2009), S. 16-21
Stichwörter:  [FB3/EOE-N]
[doi>10.1016/j.seares.2009.01.002]

Daufresne, Martin ; Lengfellner, Kathrin ; Sommer, Ulrich:
Global warming benefits the small in aquatic ecosystems .
In: PNAS (2009),
Stichwörter:  [FB3/EOE-B]
[doi>10.1073/pnas.0902080106]

Jaschinski, Sybill ; Aberle-Malzahn, Nicole ; Gohse-Reimann, S. ; Brendelberger, H. ; Wiltshire, K. ; Sommer, Ulrich:
Grazer diversity effects in an eelgrass-epiphyte-microphytobenthos system .
In: Oecologia 159 (2009), Nr. 3, S. 607-615
Stichwörter:  [FB3/EOE-N]; diversity; consumer; seagrass; ecosystem functioning; enrichment, nutrients

Javidpour, Jamileh ; Molinero, Juan Carlos ; Sommer, Ulrich:
Reconsidering evidence for Mnemiopsis invasion in European waters: reply .
In: Journal of Plankton Research 32 (2009), S. 97-98
Stichwörter:  [FB3/EOE-N]
[doi>10.1093/plankt/fbp106]

Javidpour, Jamileh ; Molinero, Juan Carlos ; Peschutter, Jesco ; Sommer, Ulrich:
Seasonal changes and population dynamics of the ctenophore Mnemiopsis leidyi after its first year of invasion in the Kiel Fjord, Western Baltic Sea .
In: Biological Invasions 11 (2009), S. 873-882
Stichwörter:  [FB3/EOE-N]; [FB3/FI]; Biological invasions; Ctenophores; Mnemiopsis leidyi; population structure; Baltic Sea
[doi>10.1007/s10530-008-9300-8]

Hansen, Thomas ; Burmeister, Angela ; Sommer, Ulrich:
Simultaneous δ15N, δ13C and δ34S measurements of low-biomass samples using a technically advanced high sensitivity elemental analyzer connected to an isoptope ratio mass spectrometer .
In: Rapid Communications in Mass Spectrometry 23 (2009), Nr. 21, S. 3387-3393; 10.1002/rcm.4267
Stichwörter:  [FB3/EOE-N]; [FB3/EV]

Jaschinski, Sybill ; Brepohl, D.C. ; Sommer, Ulrich:
Carbon sources and trophic structure in an eelgrass (Zostera marina L.) bed based on stable isotope and fatty acid analyses .
In: Marine ecology progress series 358 (2008), S. 103-114
Stichwörter:  [FB3/EOE-N]
[doi>10.3354/meps07327]

Sommer, Ulrich ; Lengfellner, Kathrin:
Climate change and the timing, magnitude and composition of the phytoplankton spring bloom .
In: Global Change Biology 14 (2008), S. 1199-1208
Stichwörter:  [FB3/EOE-N]
[doi>10.1111/j.1365-2486.2008.01571.x]

Hoppe, Hans-Georg ; Breithaupt, Petra ; Walther, K. ; Koppe, Regine ; Bleckmann, Kirsten ; Sommer, Ulrich ; Jürgens, K.:
Climate warming in winter affects the coupling between phytoplankton and bacteria during the spring bloom: a mesocosm study .
In: Aquat Microbial Ecology 51 (2008), S. 105-115
Stichwörter:  [FB3/MI]; [FB3/EOE-N]; Bacterial secondary production; Baltic Sea; climate change; global warming; marine bacteria; Mesocosm; Primary production; Respiration

Ismar, S. ; Hansen, Thomas ; Sommer, Ulrich:
Effect of food concentration and type of diet on Acartia survival and naupliar development .
In: Marine Biology 154 (2008), S. 335-343
Stichwörter:  [FB3/EOE-N]
[doi>10.1007/s00227-008-0928-9]

Jaschinski, Sybill ; Hansen, Thomas ; Sommer, Ulrich:
Effects of Acidification in multiple stable Isotope Analyses .
In: Limnology and Oceanography Methods 6 (2008), S. 12-15
Stichwörter:  [FB3/EOE-N]

Jaschinski, Sybill ; Sommer, Ulrich:
Functional diversity of mesograzers in an eelgrass-epiphyte system .
In: Marine Biology 154 (2008), S. 475-482
Stichwörter:  [FB3/EOE-N]
[doi>10.1007/s00227-008-0942-y]

Javidpour, Jamileh ; Molinero, Juan Carlos ; Peschutter, Jesco ; Sommer, Ulrich:
Mnemiopsis leidyi, the new invader of the Baltic Sea: seasonal changes and population dynamics .
In: GLOBEC International Newsletter 14 (2008), Nr. 2, S. 10-11
Stichwörter:  [FB3/EOE-N]; [FB3/EV]

Javidpour, Jamileh ; Molinero, Juan Carlos ; Peschutter, Jesco ; Sommer, Ulrich:
nemiopsis leidyi, the new invader of the Baltic Sea: seasonal changes and population dynamics .
In: GLOBEC International Newsletter 14 (2008), Nr. 2, S. 10-11
Stichwörter:  [FB3/EOE-N]; [FB3/EV]

Isla, Alejandro ; Lengfellner, Kathrin ; Sommer, Ulrich:
Physiological response of the copepod /Pseudocalanus sp./ in the Baltic Sea at different thermal scenarios .
In: Global Change Biology 14 (2008), S. 895-906
Stichwörter:  [FB3/EOE-N]
[doi>10.1111/j.1365-2486.2008.01531.x]

Jaschinski, Sybill ; Sommer, Ulrich:
Top-down and bottom-up control in an eelgrass–epiphyte system .
In: Oikos 117 (2008), Nr. 5, S. 754-762
Stichwörter:  [FB3/EOE-N]

Sommer, Ulrich:
Trophic Cascades in Marine and Freshwater Plankton .
In: International review of hydrobiology 93 (2008), Nr. 4-5, S. 506-516
Stichwörter:  [FB3/EOE-N]
[doi>10.1002/iroh.200711039]

Saage, Andrea ; Altin, D. ; Vadstein, O. ; Sommer, Ulrich:
Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord .
In: Journal of Sea Research 59 (2008), S. 162-172
Stichwörter:  [FB3/EOE-N]
[doi>10.1016/j.seares.2007.12.003]

Sommer, Ulrich ; Aberle-Malzahn, Nicole ; Engel, A. ; Hansen, Thomas ; Lengfellner, Kathrin ; Sandow, Marcel ; Wohlers, Julia ; Zöllner, Eckart ; Riebesell, Ulf:
An indoor mesocosm system to study the effect of climate change on the late winter and spring succession of Baltic Sea phyto- and zooplankton .
In: Oecologia 150 (2007), Nr. 4, S. 655-667
Stichwörter:  [FB3/EOE-N]; [FB2/BI]; [FB2/CH]
[doi>10.1007/s00442-006-0539-4]

Hansen, Thomas ; Sommer, Ulrich:
Increasing the sensitivity of delta¹³C and delta¹⁵N abundance measurements by a high sensitivity elemental analyzer connected to an isotope ratio mass spectrometer. .
In: Rapid Commun Mass Spectrom (2007), Nr. 21, S. 314-318
Stichwörter:  [FB3/EOE-N]

Lampert, Winfried ; Sommer, Ulrich:
Limnoecology. The Ecology of Lakes and Streams .
2. Aufl. Oxford : Oxford Univ. Pr., 2007.
- 336 Seiten. ISBN 978-0-19-921393-1
Stichwörter:  [FB3/EOE-N]

Al-Najjar, T. ; Badran, M.I. ; Richter, C. ; Meyerhöfer, Michael ; Sommer, Ulrich:
Seasonal dynamics of phytoplankton in the Gulf of Aqaba, Red Sea .
In: Hydrobiologia 579 (2007), S. 69-83
Stichwörter:  [FB2/BI]; [FB3/EOE-N]
[doi>10.1007/s10750-006-0365-z]

Aberle-Malzahn, Nicole ; Lengfellner, Kathrin ; Sommer, Ulrich:
Spring bloom succession, grazing impact and herbivore selectivity of ciliate communities in response to winter warming .
In: Oecologia 150 (2007), S. 668-681
Stichwörter:  [FB3/EOE-N]

Olsen, Y. ; Agusti, S. ; Andersen, T. ; Duarte, C. M. ; Gasol, J. M. ; Gismervik, I. ; Heiskanen, A.-S. ; Sommer, Ulrich ; Stibor, H. ; Tamminen, T.:
A comparative study of responses in planktonic food web structure and function in contrasting European coastal waters exposed to experimental nutrient addition. .
In: Limnology and Oceanography 51 (2006), S. 488-503
Stichwörter:  [FB3/EOE-N]

Sommer, Ulrich ; Sommer, Frank:
Cladocerans versus copepods: the cause of contrasting top-down controls on freshwater and marine phytoplankton. .
In: Oecologia 147 (2006), S. 183-194
Stichwörter:  [FB3/EO1]; [FB3/EOE-N]
[doi>10.1007/s00442-005-0320-0]

Stibor, S. ; Gelzleichter, A. ; Hantzsche, F. ; Sommer, Ulrich ; Striebel, M. ; Vadstein, O. ; Olsen, Y.:
Combining dialysis and dilution techniques to estimate gross growth rate phytoplankton and grazing by micro- and mesozooplankton in situ. .
In: Archiv für Hydrobiologie 167 (2006), Nr. 1-4, S. 403-419
Stichwörter:  [FB3/EO1]

Flöder S. ; Sommer, Ulrich:
Competition of aquatic microalgae in variable environments: the disturbance effect. .
In: Subba Rao, D.V. (Hrsg.) : Algal cultures, analogues of blooms and applications.
Bd. 2. New Hampshire : Science Publishers, 2006, S. 533-569.
Stichwörter:  [FB3/EO1]

Javidpour, Jamileh ; Sommer, Ulrich ; Shiganova, T. :
First record of Mnemiopsis leidyi A. Agassiz 1865 in the Baltic Sea .
In: Aquatic Invasions 1 (2006), Nr. 4, S. 299-302
Stichwörter:  [FB3/EO1]

Al-Najjar, T. ; Badran, M.I. ; Richter, C. ; Meyerhöfer, Michael ; Sommer, Ulrich:
Seasonal dynamics of phytoplankton in the Gulf of Aqaba, Red Sea. .
In: Hydrobiologia 579 (2006), Nr. 1, S. 69-83
Stichwörter:  [FB3/EO1]; [FB2/BI]; Chlorophyll a; Pigments; Nutrients; HPLC; CHEMTAX Gulf; Aqaba; Red Sea
[doi>10.1007/s10750-006-0365-z]

Aberle, Nicole ; Lengfellner, Kathrin ; Sommer, Ulrich:
Spring bloom succession, grazing impact and herbivore selectivity of ciliate communities in response to winter warming. .
In: Oecologia 150 (2006), S. 668-681
Stichwörter:  [FB3/EÖ-N]
[doi>10.1007/s00442-006-0540-y]

Sommer, Frank ; Hansen, Thomas ; Sommer, Ulrich:
Transfer of diazotrophic nitrogen to mesozooplankton in Kiel Fjord, Western Baltic Sea: a mesocosm study. .
In: Marine Ecology Progress Series 324 (2006), S. 105-112
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
Biologische Meereskunde .
2. Aufl. Aufl. Berlin [u.a.] : Springer, 2005.
- 412 Seiten.
Stichwörter:  [FB3/EOE-N]

Sommer, Ulrich ; Hansen, Thomas ; Blum, Olga ; Holzner, Nina ; Vadstein, Olav ; Stibor, Herwig:
Copepod and microzooplankton grazing in mesocosms fertilised with different Si:N ratios: no overlap between food spectra and Si:N influence on zooplankton trophic level .
In: Oecologia 142 (2005), S. 274-283
Stichwörter:  [FB3/EO1]; [FB3/EOE-N]; Nutrient ratios; Trophic level; Grazing; Microzooplankton; Mesozooplankton

Becker, C. ; Brepohl, Daniela ; Feuchtmayr, H., ; Zöllner, Eckart ; Sommer, Frank ; Clemmesen-Bockelmann, Catriona ; Sommer, Ulrich ; Boersma, Maarten:
Impacts of copepods on marine seston and resulting effects on Calanus finmarchicus RNA: DNA ratios in mesocosm experiments .
In: Marine Biology 146 (2005), S. 531-541
Stichwörter:  [FB3/EOE-N]; [FB3/FI]; [FB2/BI]
[doi>10.1007/s00227-004-1459-7]

Sommer, Frank ; Saage, Andrea ; Santer, Barbara ; Hansen, Thomas ; Sommer, Ulrich:
Linking foraging strategies of marine calanoid copepods to patterns of nitrogen stable isotope signatures in a mesocosm study .
In: Marine Ecology Progress Series 286 (2005), S. 99-106
Stichwörter:  [FB3/EO1]; [FB3/EOE-N]; Nitrogen stable isotopes; Trophic enrichment; Food webs; Foraging strategy; Copepods; Mesocosm; Zooplankton
[doi>10.3354/meps286099]

Sommer, Ulrich ; Frenzel, P.:
The Southern Baltic Sea and its coast in transition .
In: Aquatic Science 67 (2005), S. 129-131
Stichwörter:  [FB3/EO1];[FB3/EOE-N]

Sommer, Frank ; Sommer, Ulrich:
δ¹⁵N signatures of marine zooplankton and seston size fractions in Kiel Fjord, Baltic Sea .
In: Journal of Plankton Research 26 (2004), S. 495-500
Stichwörter:  [FB3/EO1]; [FB1/EOE-N]

Karez, R, ; Engelbert, S. ; Kraufvelin, P. ; Pedersen, M.F. ; Sommer, Ulrich:
Biomass response and changes in composition of ephemeral macroalgal assemblages along an experimental gradient of nutrient enrichment. .
In: Aqu. Bot. 78 (2004), S. 103-117
Stichwörter:  [FB3/]EO1]

Ptacnik, R. ; Sommer, Ulrich ; Hansen, T. ; Martens, V.:
Effects of microzooplankton and mixotrophy in an experimental planktonic food web .
In: Limnol. Oceanogr. 49 (2004), S. 1435-1445
Stichwörter:  [FB3/EO1]

Katechakis, A. ; Stibor, H. ; Sommer, Ulrich ; Hansen, Thomas:
Feeding selectivities and food niche separation of Acartia clausi, Penilia avirostris (Crustacea) and Doliolum denticulatum (Thaliacea) in Blanes Bay (Catalan Sea, NW Mediterranean) .
In: Journal of Plankton Research 26 (2004), S. 589-603
Stichwörter:  [FB3/EOE-N]

Vinebrook, R. ; Cottingham, K.L. ; Norberg, J. ; Scheffers, Michael ; Dodson, S.I. ; Maberly, S. C. ; Sommer, Ulrich:
Impacts of multiple stressors on biodiversity and ecosystem functioning: The role of species co-tolerance .
In: Oikos 104 (2004), S. 451-457
Stichwörter:  [FB3/EO1]

Sommer, Ulrich ; Hansen, Thomas ; Stibor, H. ; Vadstein, O.:
Persistence of phytoplankton responses to different Si:N ratios under mesozooplankton grazing pressure: a mesocosm study with Northeast Atlantic plankton .
In: Marine Ecology Progress Series 278 (2004), S. 67-75
Stichwörter:  [FB3/EO1]; [FB3/EOE-N]

Sommer, Ulrich ; Sommer, Frank ; Feuchtmayr, H. ; Hansen, Thomas:
The influence of mesozooplankton on phytoplankton nutrient limitation: A mesocosm study with northeast Atlantic phytoplankton .
In: Protist 155 (2004), S. 295-304
Stichwörter:  [FB3/EO1]; [FB3/EOE-N]

Feuchtmayr, H. ; Zöllner, Eckart ; Santer, B. ; Sommer, Ulrich ; Grey, J.:
Zooplankton interactions in an enclosure experiment .
In: Freshwater Biology 49 (2004), S. 1495-1504
Stichwörter:  [FB2/BI]; [FB3/EOE-N]

Sommer, F. ; Santer, B. ; Jamieson, C. ; Hansen, Thomas ; Sommer, Ulrich:
Daphnia population growth but not moulting is a substantial phosphorus drain for phytoplankton .
In: Freshwater Biol. (2003), Nr. 48, S. 67-74
Stichwörter:  [FB3/EO1]

Sommer, Ulrich ; Sommer, Frank ; Santer, B. ; Zöllner, E. ; Jürgens, K. ; Jamieson, C. ; Boersma, M. ; Gocke, Klaus:
Daphnia versus copepod impact on summer phytoplankton: functional compensation at both trophic levels .
In: Oecologia (2003), Nr. 135, S. 639-647
Stichwörter:  [FB3/MI]

Sommer, F. ; Hansen, Thomas ; Feuchtmayr, H. ; Santer, B. ; Tokle, N. ; Sommer, Ulrich:
Do calanoid copepods supress appendicularians in the coastal ocean?
In: J. Plankton. Res. (2003), Nr. 25, S. 869-871
Stichwörter:  [FB3/EO1]

Stibot, H. ; Sommer, Ulrich:
Mixotrophy of a phytotosynthetic flagellate viewed from an optimal foraging perspective. .
In: Protist (2003), Nr. 154, S. 91-98
Stichwörter:  [FB3/EO1]

Bokn, T.L. ; Duarte, C.M. ; Pedersen, M.F. ; Marba, N. ; Moy, F.E. ; Barrón, C. ; Bjerkeng, B. ; Borum, J. ; Christie, H. ; Engelbert, S. ; Fotel, F.L. ; Hoell, E.E. ; Karez, R. ; Kersting, K. ; Kraufvelin, P. ; Lindblad, C. ; Olsen, M. ; Sanerud, K.A. ; Sommer, Ulrich ; Sörensen, K.:
The response of experimental rocky shore communities to nutrient additions. .
In: Ecosystems (2003), Nr. 6, S. 577-
Stichwörter:  [FB3/EO1]

Katechakis, A. ; Stibor, H. ; Sommer, Ulrich ; Hansen, Thomas:
Changes in the plankton community and the microbial food web of Blanes bay (Catalan Sea. NW Mediterranean) under prolonged grazing pressure by doliolids (Tunicata), cladocerans and copepods (Crustacea) .
In: Mar. Ecol. Progr. Ser. (2002), Nr. 234, S. 55-69
Stichwörter:  [FB3/EO1]

Sommer, Ulrich ; Worm, B.:
Competition and coexistence .
Berlin, Heidelberg, New York : Springer, 2002
(Ecological Studies Bd. 161)
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
Competition in plankton communities .
In: Ecol. Stud. (2002), Nr. 161, S. 79-108
Stichwörter:  [FB3/EO1]

Worm, B. ; Lotze, H.K. ; Hillebrand, H. ; Sommer, Ulrich:
Consumer versus resource control of species diversity and ecosystem functioning .
In: Nature (2002), Nr. 417, S. 848-851
Stichwörter:  [FB3/EO1]

Sommer, Ulrich ; Stibor, H.:
Copepoda - Cladocera - Tunicata: The role of three major mesozooplankton groups in pelagic food webs .
In: Ecol. Res. (2002), Nr. 17, S. 161-174
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
Experimental systems in aquatic ecology .
In: Encyclopedia of Life Sciences (2002), Nr. art. 3180,
Stichwörter:  [FB3/EO1]

Sommer, Ulrich ; Berninger, U.G. ; Böttger-Schnack, R. ; Hansen, Thomas ; Stibor, H. ; Schnack-Schiel, S.B. ; Cornils, A. ; Hagen, W. ; Wickham, S. ; Al-Najjar, T. ; Post, A.F.:
Grazing during the spring bloom in the Gulf of Aquaba and the Northern Red Sea .
In: Mar. Ecol. Progr. Ser. (2002), Nr. 239, S. 251-261
Stichwörter:  [FB3/EO1]

Sommer, Ulrich ; Stibor, H. ; Katechakis, A. ; Sommer, Frank ; Hansen, Thomas:
Pelagic food web configurations at different levels of nutrient richness and their implications for the ratio fish production: primary production .
In: Hydrobiologia (2002), Nr. 484, S. 11-20
Stichwörter:  [FB3/EO1]

Post, A.F. ; Dedej, Z. ; Gottlieb, R. ; Li, H. ; Thomas, D.N. ; El-Absawi, E.I. ; El-Naggar, A. ; El-Gharabawi, M. ; Sommer, Ulrich:
Spatial and temporal distribution of Trichodesmium spp. in the stratified Gulf of Aquaba, Red Sea .
In: Mar. Ecol. Prog. Ser. (2002), Nr. 239, S. 241-250
Stichwörter:  [FB3/EO1]

Sommer, Ulrich ; Worm, B.:
Synthesis: Back to Santa Rosalia or, no wonder there are so many species .
In: Ecol. Stud. (2002), Nr. 161, S. 207-218
Stichwörter:  [FB3/EO1]

Flöder, S. ; Sommer, Ulrich:
An experimental test of the intermediate disturbance hypothesis using large limnetic enclosures .
In: Verh. Internat. Verein. Limnol. (2001), Nr. 27, S. 2892-2893
Stichwörter:  [FB3/EO1]

Stihl, A ; Sommer, Ulrich ; Post, A.F.:
Are natural populations of the marine, diazotrophic cyanobacterium Trichodesmium limited by P-availability?
In: J. Phycol. (2001), Nr. 37, S. 310-317
Stichwörter:  [FB3/EO1]

Olsen, Y. ; Reinertsen, H. ; Vadstein, O. ; Anderson, T. ; Gismervik, I. ; Duarte, C. ; Agusti, S. ; Stibor, H. ; Sommer, Ulrich ; Lignell, R. ; Tammiinen, T. ; Lancelot, C. ; Rousseau, V. ; Hoell, E. ; Sanderud, K.A.:
Comparative analysis of food webs based on flow networks: effects of nutrient supply on structure and function of coastal plankton communities .
In: Cont. Shelf Res. (2001), Nr. 21, S. 2043-2053
Stichwörter:  [FB3/EO1]

Lotze , H.K. ; Worm, B. ; Sommer, Ulrich:
Strong bottom-up and top-down control of early life stages of macroalgae .
In: Limnol. Oceanogr. (2001), Nr. 46, S. 749-757
Stichwörter:  [FB3/EO1]

Karez, Rolf ; Engelbert , S. ; Sommer, Ulrich:
'Co-consumption' and 'protective coating': two new proposed effects of epiphytes on their macro algal hosts in mesograzer-epiphyte-host interactions .
In: Mar. Ecol. Prog. Ser. (2000), Nr. 205, S. 85-93
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
Benthic microalgal diversity enhanced by spatial heterogeneity of grazing .
In: Oecologia (2000), Nr. 122, S. 284-287
Stichwörter:  [FB3/EO1]

Hillebrand, H. ; Sommer, Ulrich:
Diversity of bentic microalgae in response to colonization time and eutrophication .
In: Aquatic Botany (2000), Nr. 67, S. 221-236
Stichwörter:  [FB3/EO1]

Heesch, S. ; Sommer, Ulrich:
Effect of continuous nutrient enrichment on microalgae colonizing hard substrates .
In: Hydrobiologia (2000), Nr. 426, S. 183-190
Stichwörter:  [FB3/EO1]

Sommer, Frank ; Stibor, H. ; Sommer, Ulrich ; Velimirov, B.:
Grazing by mesozooplankton from Kiel Bight, Baltic Sea, on different sized algae and natural seston size fractions .
In: Mar. Ecol. Prog. Ser (2000), Nr. 199, S. 43-53
Stichwörter:  [FB3/EO1]

Lotze , H.K. ; Worm, B. ; Sommer, Ulrich:
Propagule banks, herbivory and nutrient supply control population development and dominance patterns in macroalgal blooms .
In: Oikos (2000), Nr. 85, S. 46-58
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
The scarcity of medium sized phytoplankton in the northern Red Sea explained by strong bottom -up and weak top-down control .
In: Mar. Ecol. Prog. Ser (2000), Nr. 197, S. 19-25
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
A comment on the proper use of resource ratios in microalgal ecology .
In: Arch. Hydrobiol. (1999), Nr. 146, S. 55-64
Stichwörter:  [FB3/EO1]

Sommer, Ulrich ; Meusel, Bodo ; Meyer, Cordula:
An experimental analysis of the importance of body-size in the seastar-mussel predator-prey relationship .
In: Acta Oecol. (1999), Nr. 20, S. 81-86
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
Competition and coexistence .
In: Nature (1999), Nr. 402, S. 366-367
Stichwörter:  [FB3/EO1]

Flöder, S. ; Sommer, Ulrich:
Diversity in planktonic communities: an experimental test of the intertmediate disturbance hypothesis .
In: Limnol. Oceanogr. (1999), Nr. 44, S. 1114-1119
Stichwörter:  [FB3/EO1]

Lampert, Winfried ; Sommer, Ulrich:
Limnoökologie .
2. Aufl. Stuttgart : Thieme, 1999.
- 489 Seiten. ISBN 3-13-786402-X
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
Periphyton architecture and susceptibility to grazing by periwinkles (Littorina littorea, Gastropoda) .
In: Int. Rev. Hydrobiol. (1999), Nr. 84, S. 197-204
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
The impact of herbivore type and grazing pressure on benthic microalgal diversity .
In: Ecol. Lett. (1999), Nr. 2, S. 65-69
Stichwörter:  [FB3/EO1]

Hillebrand, H. ; Sommer, Ulrich:
The nutrient stoichiometry of benthic microalgal growth: Redfield proportions are optimal .
In: Limnol. Oceanogr. (1999), Nr. 44, S. 440-446
Stichwörter:  [FB3/EO1]

Sommer, Ulrich:
The susceptibility of benthic microalgae to periwinkle (Littorina littorea, Gastropoda) grazing .
In: Aquatic Botany (1999), Nr. 63, S. 11-21
Stichwörter:  [FB3/EO1]