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Impacts of detritivore diversity loss on instream decomposition are greatest in the tropics

2021; Nature Portfolio; Volume: 12; Issue: 1 Linguagem: Inglês

10.1038/s41467-021-23930-2

2041-1723

Luz Boyero, Naiara López‐Rojo, Alan M. Tonin, Javier Pérez, Francisco Correa‐Araneda, Richard G. Pearson, Jaime Bosch, Ricardo Albariño, Sankarappan Anbalagan, Leon A. Barmuta, Ana Basaguren, Francis J. Burdon, Adriano Caliman, Marcos Callisto, Adolfo R. Calor, Ian C. Campbell, Bradley J. Cardinale, J. Jesús Casas, Ana M. Chará‐Serna, Éric Chauvet, Szymon Ciapała, J. Checo Colón-Gaud, Aydeé Cornejo, Aaron M. Davis, Monika Degebrodt, Emerson S. Dias, María Elisa Díaz, Michael M. Douglas, Andrea C. Encalada, Ricardo Figueroa, Alexander S. Flecker, Tadeusz Fleituch, Erica A. García, Gabriela García, Pavel García, Mark O. Gessner, Jesús E. Gómez, Sergio Gómez, José Francisco Gonçalves, Manuel A. S. Graça, Daniel C. Gwinn, Robert O. Hall, Neusa Hamada, Cang Hui, Daichi Imazawa, Tomoya Iwata, Samuel K Kariuki, Andrea Landeira‐Dabarca, Kelsey A. Laymon, María Leal, L. C. Marchant, Renato Tavares Martins, Frank O. Masese, Megan Maul, Brendan G. McKie, Adriana O. Medeiros, Charles Mwithali M ́Erimba, Jen A. Middleton, Silvia Monroy, Timo Muotka, Junjiro N. Negishi, Alonso Ramírez, John S. Richardson, José Rincón, J. L. Rubio, Gisele Moreira dos Santos, Romain Sarremejane, Fran Sheldon, Augustine Sitati, Nathalie Sia Doumbou Tenkiano, Scott D. Tiegs, Janine Rodulfo Tolod, Michael P. Venarsky, Anne Watson, Catherine M. Yule,

Isotope Analysis in Ecology

Abstract The relationship between detritivore diversity and decomposition can provide information on how biogeochemical cycles are affected by ongoing rates of extinction, but such evidence has come mostly from local studies and microcosm experiments. We conducted a globally distributed experiment (38 streams across 23 countries in 6 continents) using standardised methods to test the hypothesis that detritivore diversity enhances litter decomposition in streams, to establish the role of other characteristics of detritivore assemblages (abundance, biomass and body size), and to determine how patterns vary across realms, biomes and climates. We observed a positive relationship between diversity and decomposition, strongest in tropical areas, and a key role of abundance and biomass at higher latitudes. Our results suggest that litter decomposition might be altered by detritivore extinctions, particularly in tropical areas, where detritivore diversity is already relatively low and some environmental stressors particularly prevalent.