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SYNTHESIS
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Biodiversity promotes ecosystem functioning despite environmental change

  •  2 December 2021

Abstract

We performed a meta-analysis and found that biodiversity promoted ecosystem functioning in changing environments. Furthermore, positive biodiversity effects on ecosystem functioning strengthened in stressful environments but weakened in favorable environments. Biodiversity thus has the potential to provide an important biological buffer against the negative effects of global change drivers to maintain ecosystem functioning in changing environments.

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A global agenda for advancing freshwater biodiversity research

Alain Maasri, Sonja C. Jähnig, Mihai C. Adamescu, Rita Adrian, Claudio Baigun, Donald J. Baird, Angelica Batista-Morales, Núria Bonada, Lee E. Brown, Qinghua Cai, Joao V. Campos-Silva, Viola Clausnitzer, Topiltzin Contreras-MacBeath, Steven J. Cooke, Thibault Datry, Gonzalo Delacámara, Luc De Meester, Klaus-Douwe B. Dijkstra, Van Tu Do, Sami Domisch, David Dudgeon, Tibor Erös, Hendrik Freitag, Joerg Freyhof, Jana Friedrich, Martin Friedrichs-Manthey, Juergen Geist, Mark O. Gessner, Peter Goethals, Matthew Gollock, Christopher Gordon, Hans-Peter Grossart, Georges Gulemvuga, Pablo E. Gutiérrez-Fonseca, Peter Haase, Daniel Hering, Hans Jürgen Hahn, Charles P. Hawkins, Fengzhi He, Jani Heino, Virgilio Hermoso, Zeb Hogan, Franz Hölker, Jonathan M. Jeschke, Meilan Jiang, Richard K. Johnson, Gregor Kalinkat, Bakhtiyor K. Karimov, Aventino Kasangaki, Ismael A. Kimirei, Bert Kohlmann, Mathias Kuemmerlen, Jan J. Kuiper, Benjamin Kupilas, Simone D. Langhans, Richard Lansdown, Florian Leese, Francis S. Magbanua, Shin-ichiro S. Matsuzaki, Michael T. Monaghan, Levan Mumladze, Javier Muzon, Pierre A. Mvogo Ndongo, Jens C. Nejstgaard, Oxana Nikitina, Clifford Ochs, Oghenekaro Nelson Odume, Jeffrey J. Opperman, Harmony Patricio, Steffen U. Pauls, Rajeev Raghavan, Alonso Ramírez, Bindiya Rashni, Vere Ross-Gillespie, Michael J. Samways, Ralf B. Schäfer, Astrid Schmidt-Kloiber, Ole Seehausen, Deep Narayan Shah, Subodh Sharma, Janne Soininen, Nike Sommerwerk, Jason D. Stockwell, Frank Suhling, Ram Devi Tachamo Shah, Rebecca E. Tharme, James H. Thorp, David Tickner, Klement Tockner, Jonathan D. Tonkin, Mireia Valle, Jean Vitule, Martin Volk, Ding Wang, Christian Wolter, Susanne Worischka,
  •  1 December 2021

Abstract

Global freshwater biodiversity is declining dramatically, and meeting the challenges of this crisis requires bold goals and the mobilization of substantial resources. We provide a concise agenda of 15 pressing priority needs in an effort to support informed global freshwater biodiversity stewardship. The proposed agenda aims to advance freshwater biodiversity research globally as a critical step in improving coordinated action towards its sustainable management and conservation.

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Rapid evolution of life‐history traits in response to warming, predation and competition: A meta‐analysis

  •  30 November 2021

Abstract

To assess the frequency, magnitude and direction of rapid evolutionary change across taxa, we conducted a meta-analysis of 58 studies that document the effects of warming, predation and competition on the evolution of body size, development rate and fecundity in natural or experimental animal populations. We found surprisingly weak effects of all three selective agents on the evolution of life-history traits, and we discuss the potential underlying causes for these weak evolutionary responses and the implications of our findings for the ongoing development of eco-evolutionary research.

LETTER
Open access

The hidden role of multi‐trophic interactions in driving diversity–productivity relationships

  •  30 November 2021

Abstract

While resource-use complementarity and multi-trophic interactions are both known to drive biodiversity–productivity relationships in producer communities, their joint effect remains unknown. We show that both mechanisms interactively create communities of complementary producer species that maximise net diversity effects and highlight the importance to adopt a multi-trophic perspective on biodiversity–ecosystem functioning relationships.

LETTER

Reproductive benefits associated with dispersal in headwater populations of Trinidadian guppies (Poecilia reticulata)

  •  25 November 2021

Abstract

We make use of a long–term mark–recapture study and multigenerational pedigrees of two wild populations of Trinidadian guppies (Poecilia reticulata) to explore the relationship between dispersal and fitness and how it varies across individuals and environments. We show that dispersal propensity and distance varies with sex, body size, stream, and seasonality. We also documented a striking and consistent reproductive benefit of dispersal for male guppies, wherein dispersing males had 35% more offspring than philopatric males when holding all other variables constant, and were 1.6 times as likely to have any offspring at all. Our results demonstrate that dispersal is a major determinant of male reproduction in Trinidadian guppies, and suggest that selection for increased reproductive output drives male–biased dispersal in this system.

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