Ulrich Sommer

25.9k total citations · 4 hit papers
337 papers, 18.0k citations indexed

About

Ulrich Sommer is a scholar working on Oceanography, Ecology and Environmental Chemistry. According to data from OpenAlex, Ulrich Sommer has authored 337 papers receiving a total of 18.0k indexed citations (citations by other indexed papers that have themselves been cited), including 217 papers in Oceanography, 120 papers in Ecology and 100 papers in Environmental Chemistry. Recurrent topics in Ulrich Sommer's work include Marine and coastal ecosystems (171 papers), Marine Biology and Ecology Research (107 papers) and Aquatic Ecosystems and Phytoplankton Dynamics (97 papers). Ulrich Sommer is often cited by papers focused on Marine and coastal ecosystems (171 papers), Marine Biology and Ecology Research (107 papers) and Aquatic Ecosystems and Phytoplankton Dynamics (97 papers). Ulrich Sommer collaborates with scholars based in Germany, Greece and United States. Ulrich Sommer's co-authors include Z. Maciej Gliwicz, Winfried Lampert, Annie Duncan, Helmut Hillebrand, Boris Worm, Monika Winder, Heike K. Lotze, Frank Sommer, Thomas Hansen and Aleksandra M. Lewandowska and has published in prestigious journals such as Nature, Proceedings of the National Academy of Sciences and SHILAP Revista de lepidopterología.

In The Last Decade

Ulrich Sommer

327 papers receiving 16.8k citations

Hit Papers

The PEG-model of seasonal... 1986 2026 1999 2012 1986 2012 2004 2012 500 1000 1.5k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. The PEG-model of seasonal succession of planktonic events in fresh waters
    1986 1.7k citations Ulrich Sommer, Winfried Lampert et al. profile →
  2. Beyond the Plankton Ecology Group (PEG) Model: Mechanisms Driving Plankton Succession
    2012 592 citations Ulrich Sommer, Lisette N. de Senerpont Domis et al. profile →
  3. Impacts of multiple stressors on biodiversity and ecosystem functioning: the role of species co‐tolerance
    2004 563 citations Ulrich Sommer et al. profile →
  4. Phytoplankton response to a changing climate
    2012 484 citations Monika Winder, Ulrich Sommer profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ulrich Sommer Germany 73 11.0k 8.2k 6.7k 3.4k 2.4k 337 18.0k
Robert W. Sterner United States 56 5.3k 0.5× 8.5k 1.0× 7.2k 1.1× 2.6k 0.8× 5.0k 2.1× 112 17.3k
Dag O. Hessen Norway 61 6.8k 0.6× 7.4k 0.9× 7.4k 1.1× 2.3k 0.7× 3.3k 1.4× 290 15.9k
Christopher J. Gobler United States 60 11.7k 1.1× 7.3k 0.9× 8.7k 1.3× 3.1k 0.9× 633 0.3× 246 17.8k
Hans W. Paerl United States 56 8.5k 0.8× 6.3k 0.8× 8.5k 1.3× 1.1k 0.3× 955 0.4× 175 14.9k
TIMOTHY R. PARSONS Canada 41 12.3k 1.1× 7.4k 0.9× 4.4k 0.7× 5.0k 1.5× 1.3k 0.6× 107 19.3k
Daniel J. Conley Sweden 69 8.7k 0.8× 5.5k 0.7× 6.1k 0.9× 2.7k 0.8× 1.1k 0.5× 212 19.2k
Martin Søndergaard Denmark 73 7.3k 0.7× 10.2k 1.2× 13.8k 2.1× 2.0k 0.6× 5.2k 2.2× 300 20.8k
Craig E. Williamson United States 55 4.9k 0.4× 4.4k 0.5× 5.0k 0.7× 1.6k 0.5× 2.2k 0.9× 157 10.6k
Stephen C. Maberly United Kingdom 57 4.4k 0.4× 3.5k 0.4× 3.9k 0.6× 1.4k 0.4× 1.3k 0.5× 186 9.9k
Boqiang Qin China 79 11.5k 1.0× 6.9k 0.8× 12.9k 1.9× 1.9k 0.6× 1.9k 0.8× 350 21.1k

Countries citing papers authored by Ulrich Sommer

Since Specialization
Citations

This map shows the geographic impact of Ulrich Sommer's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ulrich Sommer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ulrich Sommer more than expected).

Fields of papers citing papers by Ulrich Sommer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ulrich Sommer. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ulrich Sommer. The network helps show where Ulrich Sommer may publish in the future.

Co-authorship network of co-authors of Ulrich Sommer

This figure shows the co-authorship network connecting the top 25 collaborators of Ulrich Sommer. A scholar is included among the top collaborators of Ulrich Sommer based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ulrich Sommer. Ulrich Sommer is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Baenke, Franziska, Ulrich Sommer, Daniela E. Aust, et al.. (2025). Intratumoral regulatory T cells are associated with treatment response to neoadjuvant chemotherapy and prognosis in gastroesophageal adenocarcinoma. OncoImmunology. 14(1). 2574859–2574859.
2.
Miederer, Matthias, Marc Pretze, Andreas Hartig, et al.. (2025). Staging metastatic urothelial cancer with Nectin‐4 imaging using Gallium‐68‐ N188 PET / CT. British Journal of Urology. 137(1). 166–172. 2 indexed citations
3.
Sommer, Ulrich. (2023). Freshwater and Marine Ecology. Helmholtz Centre for Ocean Research Kiel (GEOMAR). 1 indexed citations
4.
Pecqueux, Mathieu, Ulrich Sommer, Franziska Baenke, et al.. (2023). RAB27B expression in pancreatic cancer is predictive of poor survival but good response to chemotherapy. Cancer Biomarkers. 37(4). 207–215. 2 indexed citations
5.
Briski, Elizabeta, Ross N. Cuthbert, Alejandro Bortolus, et al.. (2023). Does non‐native diversity mirror Earth's biodiversity?. Global Ecology and Biogeography. 33(1). 48–62. 19 indexed citations
6.
7.
Stibor, Herwig, Nelson G. Hairston, Barbara Santer, et al.. (2021). Winfried Lampert—International Visionary for the Aquatic Sciences. Limnology and Oceanography Bulletin. 30(3). 107–113. 1 indexed citations
8.
Horn, Henriette G., et al.. (2020). High CO2 and warming affect microzooplankton food web dynamics in a Baltic Sea summer plankton community. Marine Biology. 167(5). 19 indexed citations
9.
10.
Bi, Rong, Stefanie M. H. Ismar, Ulrich Sommer, Hailong Zhang, & Meixun Zhao. (2020). Ocean-related global change alters lipid biomarker production in common marine phytoplankton. Biogeosciences. 17(24). 6287–6307. 12 indexed citations
11.
Thaler, Erica R., Richard J. Schwab, Joachim T. Maurer, et al.. (2019). Results of the ADHERE upper airway stimulation registry and predictors of therapy efficacy. The Laryngoscope. 130(5). 1333–1338. 117 indexed citations
12.
Bi, Rong, Stefanie M. H. Ismar, Ulrich Sommer, & Meixun Zhao. (2018). Simultaneous shifts in elemental stoichiometry and fatty acids of Emiliania huxleyi in response to environmental changes. Biogeosciences. 15(4). 1029–1045. 15 indexed citations
13.
Bi, Rong, Stefanie M. H. Ismar, Ulrich Sommer, & Meixun Zhao. (2017). Simultaneous shifts in stoichiometric and fatty acid compositionof Emiliania huxleyi in response to environmental changes. 3 indexed citations
14.
15.
Domis, Lisette N. de Senerpont, James J. Elser, Alena S. Gsell, et al.. (2013). Plankton dynamics under different climate conditions in tropical freshwater systems (a reply to the comment by Sarmento, Amado & Descy, ). Freshwater Biology. 58(10). 2211–2213. 11 indexed citations
16.
Taucher, Jan, Kai G. Schulz, Thorsten Dittmar, et al.. (2012). Enhanced carbon overconsumption in response to increasing temperatures during a mesocosm experiment. Biogeosciences. 9(9). 3531–3545. 43 indexed citations
17.
Lampert, Winfried & Ulrich Sommer. (1997). Limnoecology: The Ecology of Lakes and Streams. Helmholtz Centre for Ocean Research Kiel (GEOMAR). 18 indexed citations
18.
Sommer, Ulrich, et al.. (1996). Ekologia wod srodladowych. 2 indexed citations
19.
Sommer, Ulrich. (1996). Algen, Quallen, Wasserfloh: Die Welt des Planktons. Springer eBooks. 7 indexed citations
20.
Sommer, Ulrich. (1983). Nutrient competition between phyto plankton species in multi species chemostat experiments. Helmholtz Centre for Ocean Research Kiel (GEOMAR). 96(4). 399–416. 111 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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