Defaunation affects carbon storage in tropical forests
Carolina Bello1, Mauro Galetti1, Marco A Pizo2
1Departamento de Ecologia, Universidade Estadual Paulista, Rio Claro, São Paulo 13506-900, Brazil.
Science Advances
|January 30, 2016
Summary
Deforestation and climate change impact forest carbon storage. However, the loss of large seed-dispersing animals (defaunation) also threatens carbon storage by affecting tropical tree regeneration.
Area of Science:
- Forest Ecology
- Conservation Biology
- Ecosystem Services
Background:
- Forests provide crucial carbon storage services.
- Tropical carbon stocks are affected by deforestation, logging, fire, and climate change.
- Defaunation, particularly the loss of large seed dispersers, is an underappreciated threat to forest carbon storage.
Purpose of the Study:
- To quantify the impact of defaunation on tropical forest carbon storage.
- To assess the role of large seed dispersers in maintaining forest carbon stocks.
- To highlight the risk defaunation poses to tropical forest carbon maintenance.
Main Methods:
- Utilized a comprehensive dataset on tree species, abundance, traits (seed, fruit, carbon), and plant-animal interactions.
- Simulated local extinction of trees reliant on large frugivores.
- Analyzed 31 Atlantic Forest communities to estimate carbon storage loss under defaunation scenarios.
Main Results:
- Defaunation can significantly reduce forest carbon storage capacity.
- Even the extirpation of a small proportion of large-seeded trees due to defaunation leads to substantial carbon loss.
- Loss of key ecological interactions, specifically seed dispersal by large vertebrates, erodes carbon storage.
Conclusions:
- Defaunation represents a significant, yet often overlooked, threat to tropical forest carbon storage.
- Conservation policies must consider the impact of defaunation alongside deforestation and reforestation efforts.
- Maintaining viable populations of large frugivores is essential for preserving carbon stocks in tropical forests.
Keywords:
Atlantic ForestEcosystemsbiodiversitybushmeatcarbon storageconservationdefaunationrainforestsseed dispersaltropical ecosystemsMore Related Videos
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