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Seed predation increases from the Arctic to the Equator and from high to low elevations
Author
Hargreaves, A. L.Suarez, Esteban
Mehltreter, Klaus
Myers-Smith, Isla
Vanderplank, Sula E.
Slinn, Heather L.
Vargas-Rodriguez, Yalma L.
Haeussler, Sybille
David, Santiago
Munoz, Jenny
Almazan-Nunez, R. C.
Loughnan, Deirdre
Benning, John W.
Moeller, David A.
Brodie, Jedediah F.
Thomas, Haydn J. D.
Morales M., P. A.
Date
2019Type
ArticleAbstract
Species interactions have long been predicted to increase in intensity toward the tropics and low elevations because of gradients in climate, productivity, or biodiversity. Despite their importance for understanding global ecological and evolutionary processes, plant-animal interaction gradients are particularly difficult to test systematically across large geographic gradients, and evidence from smaller, disparate studies is inconclusive. By systematically measuring postdispersal seed predation using 6995 standardized seed depots along 18 mountains in the Pacific cordillera, we found that seed predation increases by 17% from the Arctic to the Equator and by 17% from 4000 meters above sea level to sea level. Clines in total predation, likely driven by invertebrates, were consistent across treeline ecotones and within continuous forest and were better explained by climate seasonality than by productivity, biodiversity, or latitude. These results suggest that species interactions play predictably greater ecological and evolutionary roles in tropical, lowland, and other less seasonal ecosystems.
Permanent link
http://hdl.handle.net/11714/6094Additional Information
Journal Title | Science Advances |
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Rights | Creative Commons Attribution-NonCommercial 4.0 International |
Rights Holder | Authors |