Th. Keller

1.7k total citations · 1 hit paper
43 papers, 1.3k citations indexed

About

Th. Keller is a scholar working on Plant Science, Nature and Landscape Conservation and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, Th. Keller has authored 43 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 25 papers in Plant Science, 11 papers in Nature and Landscape Conservation and 10 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in Th. Keller's work include Plant responses to elevated CO2 (17 papers), Forest ecology and management (11 papers) and Lichen and fungal ecology (7 papers). Th. Keller is often cited by papers focused on Plant responses to elevated CO2 (17 papers), Forest ecology and management (11 papers) and Lichen and fungal ecology (7 papers). Th. Keller collaborates with scholars based in Switzerland, Germany and United Kingdom. Th. Keller's co-authors include C. C. Whitehead, Rainer Matyssek, S. Maurer, A. Wytténbach, S. Bajo, L. Tobler, W. Landolt, H. Jeroch, Munehiro Katagi and Madeleine S. Günthardt‐Goerg and has published in prestigious journals such as Environmental Pollution, Oecologia and Cellular and Molecular Life Sciences.

In The Last Decade

Th. Keller

42 papers receiving 1.2k citations

Hit Papers

Air pollution and ascorbic acid 1977 2026 1993 2009 1977 100 200 300 400
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. Air pollution and ascorbic acid
    1977 423 citations Th. Keller et al. Forest Pathology profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Th. Keller Switzerland 17 924 354 277 159 154 43 1.3k
Debra Partington Australia 17 582 0.6× 139 0.4× 210 0.8× 104 0.7× 137 0.9× 48 1.0k
Hans‐Joachim Weigel Germany 27 2.2k 2.3× 934 2.6× 752 2.7× 358 2.3× 69 0.4× 110 2.6k
Elisa Pellegrini Italy 30 1.7k 1.9× 427 1.2× 273 1.0× 169 1.1× 66 0.4× 113 2.2k
Remigius Manderscheid Germany 28 1.8k 1.9× 708 2.0× 704 2.5× 365 2.3× 54 0.4× 71 2.1k
V. C. Runeckles Canada 21 928 1.0× 405 1.1× 185 0.7× 176 1.1× 29 0.2× 61 1.4k
Jürgen Bender Germany 18 964 1.0× 579 1.6× 236 0.9× 77 0.5× 21 0.1× 42 1.2k
Jürgen Franzaring Germany 24 1.0k 1.1× 428 1.2× 214 0.8× 115 0.7× 208 1.4× 63 1.6k
Jonathan Cumming United States 30 1.8k 1.9× 126 0.4× 225 0.8× 215 1.4× 237 1.5× 66 2.4k
G. F. Israelstam Canada 5 2.4k 2.6× 84 0.2× 159 0.6× 201 1.3× 225 1.5× 20 2.8k
Alessandra Francini Italy 23 1.8k 2.0× 141 0.4× 111 0.4× 132 0.8× 193 1.3× 80 2.4k

Countries citing papers authored by Th. Keller

Since Specialization
Citations

This map shows the geographic impact of Th. Keller'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 Th. Keller with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Th. Keller more than expected).

Fields of papers citing papers by Th. Keller

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Th. Keller. 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 Th. Keller. The network helps show where Th. Keller may publish in the future.

Co-authorship network of co-authors of Th. Keller

This figure shows the co-authorship network connecting the top 25 collaborators of Th. Keller. A scholar is included among the top collaborators of Th. Keller 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 Th. Keller. Th. Keller 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.
Näsi, Matti, et al.. (2006). Modulation of Conjugated Linoleic Acid-Induced Loss of Chicken Egg Hatchability by Dietary Soybean Oil. Poultry Science. 85(4). 712–720. 16 indexed citations
2.
Nishikawa, Mayumi, Hitoshi Tsuchihashi, Akihiro Miki, et al.. (1999). Determination of ethyl glucuronide, a minor metabolite of ethanol, in human serum by liquid chromatography–electrospray ionization mass spectrometry. Journal of Chromatography B Biomedical Sciences and Applications. 726(1-2). 105–110. 51 indexed citations
3.
4.
Fischer, Burnell C., Fritz Hans Schweingruber, & Th. Keller. (1994). Impact of immissions from a garbage incinerator in Switzerland on the radial increment of beech trees. Dendrochronologia. 11. 153–158. 1 indexed citations
5.
Keller, Th., Rainer Matyssek, & Madeleine S. Günthardt‐Goerg. (1994). Beech foliage as a bioindicator of pollution near a waste incinerator. Environmental Pollution. 85(2). 185–189. 5 indexed citations
6.
Keller, Th., et al.. (1994). Comparative studies on the efficiency of various biological silage additives for the ensiling of Lucerne. Archiv für Tierernaehrung. 47(1). 75–87. 3 indexed citations
7.
Günthardt‐Goerg, Madeleine S., Th. Keller, Rainer Matyssek, & Christoph Scheidegger. (1994). Environmental Effects on Norway Spruce Needle Wax. European Journal of Forest Pathology. 24(2). 92–111. 16 indexed citations
8.
Günthardt‐Goerg, Madeleine S., Rainer Matyssek, & Th. Keller. (1993). Birke (Betula pendula): Mögliche Akklimatisierung an Ozon-Streß. European Journal of Forest Research. 112(1). 46–49. 1 indexed citations
9.
Matyssek, Rainer, Th. Keller, & Madeleine S. Günthardt‐Goerg. (1990). Ozone effects on the various levels of organization in woody plants.. Schweizerische Zeitschrift fur Forstwesen. 141(8). 631–651. 1 indexed citations
10.
Keller, Th. & Rainer Matyssek. (1990). Limited compensation of ozone stress by potassium in Norway spruce. Environmental Pollution. 67(1). 1–14. 16 indexed citations
11.
Keller, Th.. (1988). Growth and premature leaf fall in American aspen as bioindications for ozone. Environmental Pollution. 52(3). 183–192. 30 indexed citations
12.
Keller, Th. & R. Häsler. (1986). The influence of a prolonged SO2 fumigation on the stomatal reaction of spruce. European Journal of Forest Pathology. 16(2). 110–115. 9 indexed citations
13.
Landolt, W. & Th. Keller. (1985). Uptake and effects of air pollutants on woody plants. Cellular and Molecular Life Sciences. 41(3). 301–310. 18 indexed citations
14.
Keller, Th.. (1984). Direct effects of sulphur dioxide on trees. Philosophical transactions of the Royal Society of London. Series B, Biological sciences. 305(1124). 317–326. 10 indexed citations
15.
Keller, Th., et al.. (1984). The influence of a fall fumigation with ozone on the stomatal behavior of spruce and fir. Oecologia. 64(2). 284–286. 57 indexed citations
16.
Keller, Th.. (1980). The simultaneous effect of soil-borne NaF and air pollutant SO2 on CO2-uptake and pollutant accumulation. Oecologia. 44(2). 283–285. 14 indexed citations
17.
Keller, Th., et al.. (1977). Air pollution and ascorbic acid. Forest Pathology. 7(6). 338–350. 423 indexed citations breakdown →
18.
Keller, Th., et al.. (1976). Zur Mikrobestimmung des Gesamtschwefels in Pflanzengewebe. International Journal of Environmental & Analytical Chemistry. 4(4). 275–284. 8 indexed citations
19.
Keller, Th.. (1974). Die Peroxidase-Aktivität als Indikator unsichtbarer Immissionsschädigungen. Journal of Pest Science. 47(6). 86–89. 3 indexed citations
20.
Keller, Th., et al.. (1970). Über die Bleiaufnahme und die Bleiverteilung in jungen Fichten. Forstwissenschaftliches Centralblatt. 89(1). 20–26. 30 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Debra Partington Breakdown of academic impact, for papers by Hans‐Joachim Weigel Breakdown of academic impact, for papers by Elisa Pellegrini Breakdown of academic impact, for papers by Remigius Manderscheid Breakdown of academic impact, for papers by V. C. Runeckles Breakdown of academic impact, for papers by Jürgen Bender Breakdown of academic impact, for papers by Jürgen Franzaring Breakdown of academic impact, for papers by Jonathan Cumming Breakdown of academic impact, for papers by G. F. Israelstam Breakdown of academic impact, for papers by Alessandra Francini
Rankless by CCL
2026