Denis Vallan

959 total citations
13 papers, 463 citations indexed

About

Denis Vallan is a scholar working on Global and Planetary Change, Ecology, Evolution, Behavior and Systematics and Social Psychology. According to data from OpenAlex, Denis Vallan has authored 13 papers receiving a total of 463 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Global and Planetary Change, 8 papers in Ecology, Evolution, Behavior and Systematics and 3 papers in Social Psychology. Recurrent topics in Denis Vallan's work include Amphibian and Reptile Biology (12 papers), Animal Behavior and Reproduction (5 papers) and Species Distribution and Climate Change (3 papers). Denis Vallan is often cited by papers focused on Amphibian and Reptile Biology (12 papers), Animal Behavior and Reproduction (5 papers) and Species Distribution and Climate Change (3 papers). Denis Vallan collaborates with scholars based in Switzerland, Germany and Italy. Denis Vallan's co-authors include Franco Andreone, Miguel Vences, Frank Glaw, Neil A. Cox, Christopher J. Raxworthy, John E. Cadle, Simon N. Stuart, Ronald A. Nussbaum, Rainer Dolch and Herilala Randriamahazo and has published in prestigious journals such as Conservation Biology, Biological Conservation and Journal of Tropical Ecology.

In The Last Decade

Denis Vallan

13 papers receiving 407 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Denis Vallan Switzerland 9 388 175 174 155 120 13 463
José A. Langone United States 13 458 1.2× 154 0.9× 188 1.1× 130 0.8× 124 1.0× 40 533
Magno V. Segalla Brazil 8 414 1.1× 140 0.8× 139 0.8× 164 1.1× 114 0.9× 13 478
Raúl Maneyro Uruguay 17 615 1.6× 306 1.7× 238 1.4× 237 1.5× 142 1.2× 73 748
Ori Segev Israel 13 253 0.7× 101 0.6× 161 0.9× 156 1.0× 104 0.9× 27 385
Chad E. Montgomery United States 8 298 0.8× 138 0.8× 122 0.7× 192 1.2× 114 0.9× 24 423
Eduardo A. Sanabria Argentina 13 342 0.9× 167 1.0× 173 1.0× 192 1.2× 48 0.4× 62 461
Margaret S. Gunzburger United States 14 277 0.7× 110 0.6× 146 0.8× 184 1.2× 168 1.4× 19 436
Masao Uetanabaro Brazil 12 524 1.4× 136 0.8× 285 1.6× 176 1.1× 137 1.1× 14 584
Noromalala Raminosoa Madagascar 10 230 0.6× 72 0.4× 107 0.6× 140 0.9× 64 0.5× 26 357
Dante Pavan Brazil 13 320 0.8× 106 0.6× 171 1.0× 74 0.5× 126 1.1× 24 400

Countries citing papers authored by Denis Vallan

Since Specialization
Citations

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

Fields of papers citing papers by Denis Vallan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Denis Vallan

This figure shows the co-authorship network connecting the top 25 collaborators of Denis Vallan. A scholar is included among the top collaborators of Denis Vallan 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 Denis Vallan. Denis Vallan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

13 of 13 papers shown
1.
Glaw, Frank, et al.. (2015). Beautiful bright belly: A distinctive new microhylid frog (Amphibia: Stumpffia) from eastern Madagascar. Zootaxa. 3925(1). 120–8. 5 indexed citations
2.
Glaw, Frank, Denis Vallan, & Miguel Vences. (2010). Forceps delivery of a new treefrog species of the genus Boophis from eastern Madagascar (Amphibia: Mantellidae). Amphibia-Reptilia. 31(1). 1–8. 8 indexed citations
3.
Andreone, Franco, Neil A. Cox, Jörn Köhler, et al.. (2008). Update of the Global Amphibian Assessment for Madagascar in light of species discoveries, nomenclature changes, and new field information. 21 indexed citations
4.
Vallan, Denis, Frank Glaw, & Miguel Vences. (2005). The calls of Plethodontohyla inguinalis from eastern Madagascar (Amphibia, Microhylidae). Biodiversity Heritage Library (Smithsonian Institution). 2 indexed citations
5.
Andreone, Franco, John E. Cadle, Neil A. Cox, et al.. (2005). Species Review of Amphibian Extinction Risks in Madagascar: Conclusions from the Global Amphibian Assessment. Conservation Biology. 19(6). 1790–1802. 118 indexed citations
6.
7.
Vallan, Denis, Miguel Vences, & Frank Glaw. (2003). Two new species of the Boophis mandraka complex (Anura, Mantellidae) from the Andasibe region in eastern Madagascar. Amphibia-Reptilia. 24(3). 305–319. 8 indexed citations
8.
Vallan, Denis. (2002). Effects of anthropogenic environmental changes on amphibian diversity in the rain forests of eastern Madagascar. Journal of Tropical Ecology. 18(5). 725–742. 95 indexed citations
9.
Glaw, Frank, Miguel Vences, Franco Andreone, & Denis Vallan. (2001). Revision of the Boophis majori group (Amphibia: Mantellidae) from Madagascar, with descriptions of five new species. Zoological Journal of the Linnean Society. 133(4). 495–529. 26 indexed citations
10.
Vallan, Denis. (2000). Influence of forest fragmentation on amphibian diversity in the nature reserve of Ambohitantely, highland Madagascar. Biological Conservation. 96(1). 31–43. 123 indexed citations
11.
12.
Andreone, Franco, Frank Glaw, Miguel Vences, & Denis Vallan. (1998). A NEW MANTIDACTYLUS FROM SOUTH-EASTERN MADAGASCAR, WITH A REVIEW OF MANTIDACTYLUS PERACCAE (RANIDAE: MANTELLINAE). Herpetological Journal. 8(3). 149–159. 12 indexed citations
13.
Vallan, Denis, Frank Glaw, Franco Andreone, & John E. Cadle. (1998). A new treefrog species of the genus Boophis (Anura: Ranidae: Rhacophorinae) with dermal fringes from Madagascar. Amphibia-Reptilia. 19(4). 357–368. 6 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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