R
Risto Virtanen
Researcher at University of Oulu
Publications - 142
Citations - 9951
Risto Virtanen is an academic researcher from University of Oulu. The author has contributed to research in topics: Species richness & Biodiversity. The author has an hindex of 42, co-authored 126 publications receiving 8272 citations. Previous affiliations of Risto Virtanen include University of North Carolina at Chapel Hill & Finnish Environment Institute.
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Journal ArticleDOI
Trophic Downgrading of Planet Earth
James A. Estes,John Terborgh,Justin S. Brashares,Mary E. Power,Joel Berger,William J. Bond,Stephen R. Carpenter,Timothy E. Essington,Robert D. Holt,Jeremy B. C. Jackson,Robert J. Marquis,Lauri Oksanen,Tarja Oksanen,Robert T. Paine,Ellen K. Pikitch,William J. Ripple,Stuart A. Sandin,Marten Scheffer,Thomas W. Schoener,Jonathan B. Shurin,Anthony R. E. Sinclair,Michael E. Soulé,Risto Virtanen,David A. Wardle +23 more
TL;DR: This empirical work supports long-standing theory about the role of top-down forcing in ecosystems but also highlights the unanticipated impacts of trophic cascades on processes as diverse as the dynamics of disease, wildfire, carbon sequestration, invasive species, and biogeochemical cycles.
Journal ArticleDOI
Biodiversity Differences between Managed and Unmanaged Forests: Meta-Analysis of Species Richness in Europe
Yoan Paillet,Laurent Bergès,Joakim Hjältén,Péter Ódor,Catherine Avon,Markus Bernhardt-Römermann,R.J. Bijlsma,Luc De Bruyn,Luc De Bruyn,Marc Fuhr,Ulf Grandin,Robert Kanka,Lars Lundin,Sandra Luque,Tibor Magura,Silvia Matesanz,Ilona Mészáros,M. Teresa Sebastià,Wolfgang Schmidt,Tibor Standovár,Béla Tóthmérész,Anneli Uotila,Fernando Valladares,Kai Vellak,Risto Virtanen +24 more
TL;DR: The global difference in species richness between unmanaged and managed forests increased with time since abandonment and indicated a gradual recovery of biodiversity, which supports the need for a coordinated European research network to study and monitor the biodiversity of different taxa in managed and unmanaged forests.
Journal ArticleDOI
Global trait–environment relationships of plant communities
Helge Bruelheide,Jürgen Dengler,Jürgen Dengler,Oliver Purschke,Jonathan Lenoir,Borja Jiménez-Alfaro,Borja Jiménez-Alfaro,Stephan M. Hennekens,Zoltán Botta-Dukát,Milan Chytrý,Richard Field,Florian Jansen,Jens Kattge,Valério D. Pillar,Franziska Schrodt,Franziska Schrodt,Miguel D. Mahecha,Robert K. Peet,Brody Sandel,Peter M. van Bodegom,Jan Altman,Esteban Álvarez-Dávila,Mohammed Abu Sayed Arfin Khan,Mohammed Abu Sayed Arfin Khan,Fabio Attorre,Isabelle Aubin,Christopher Baraloto,Jorcely Barroso,Marijn Bauters,Erwin Bergmeier,Idoia Biurrun,Anne D. Bjorkman,Benjamin Blonder,Benjamin Blonder,Andraž Čarni,Andraž Čarni,Luis Cayuela,Tomáš Černý,J. Hans C. Cornelissen,Dylan Craven,Matteo Dainese,Géraldine Derroire,Michele De Sanctis,Sandra Díaz,Jiří Doležal,William Farfan-Rios,William Farfan-Rios,Ted R. Feldpausch,Nicole J. Fenton,Eric Garnier,Greg R. Guerin,Alvaro G. Gutiérrez,Sylvia Haider,Tarek Hattab,Greg H. R. Henry,Bruno Hérault,Pedro Higuchi,Norbert Hölzel,Jürgen Homeier,Anke Jentsch,Norbert Jürgens,Zygmunt Kącki,Dirk Nikolaus Karger,Dirk Nikolaus Karger,Michael Kessler,Michael Kleyer,Ilona Knollová,Andrey Yu. Korolyuk,Ingolf Kühn,Daniel C. Laughlin,Daniel C. Laughlin,Frederic Lens,Jacqueline Loos,Frédérique Louault,Mariyana Lyubenova,Yadvinder Malhi,Corrado Marcenò,Maurizio Mencuccini,Jonas V. Müller,Jérôme Munzinger,Isla H. Myers-Smith,David A. Neill,Ülo Niinemets,Kate H. Orwin,Wim A. Ozinga,Wim A. Ozinga,Josep Peñuelas,Aaron Pérez-Haase,Aaron Pérez-Haase,Petr Petřík,Oliver L. Phillips,Meelis Pärtel,Peter B. Reich,Peter B. Reich,Christine Römermann,Arthur Vinicius Rodrigues,Francesco Maria Sabatini,Jordi Sardans,Marco Schmidt,Gunnar Seidler,Javier Silva Espejo,Marcos Silveira,Anita K. Smyth,Maria Sporbert,Jens-Christian Svenning,Zhiyao Tang,Raquel Thomas,Ioannis Tsiripidis,Kiril Vassilev,Cyrille Violle,Risto Virtanen,Evan Weiher,Erik Welk,Karsten Wesche,Karsten Wesche,Marten Winter,Christian Wirth,Christian Wirth,Ute Jandt +118 more
TL;DR: It is shown that global trait composition is captured by two main dimensions that are only weakly related to macro-environmental drivers, which reflect the trade-offs at the species level but are weakly associated with climate and soil conditions at the global scale.
Journal ArticleDOI
Distance decay of similarity in freshwater communities: do macro‐ and microorganisms follow the same rules?
TL;DR: The results suggest that patterns between macro- and microorganisms are not fundamentally different, but the level of environmental control varies according to dispersal ability.
Journal ArticleDOI
Effects of altitude and topography on species richness of vascular plants, bryophytes and lichens in alpine communities
Hans Henrik Bruun,Jon Moen,Risto Virtanen,John-Arvid Grytnes,Lauri Oksanen,Anders Angerbjörn +5 more
TL;DR: Patterns in local species richness result from the action of two opposing forces: declining species pool and decreasing intensity of competition with altitude.