Ocorrência de aves diurnas em matas primárias e secundárias na Amazônia Central
Secondary forests (SF) are expanding worldwide and replacing large areas of old growth forest (OG) in the tropics. Wildlife management thus requires knowledge of SF usage by OG fauna. Five recent reviews suggest that SF older than 20 years has similar richness to OG; nonetheless, the optimism of t...
| Autor principal: | Freitas, Sandra Martins de |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11979 http://lattes.cnpq.br/7171325089233993 |
| Resumo: |
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Secondary forests (SF) are expanding worldwide and replacing large areas of old growth forest
(OG) in the tropics. Wildlife management thus requires knowledge of SF usage by OG fauna. Five recent
reviews suggest that SF older than 20 years has similar richness to OG; nonetheless, the optimism of this
message is still subject to confirmation because many studies are based on small sample sizes and/or lack
the necessary analytical robustness. Aiming for a detailed understanding of SF use by birds in a highly
diverse Amazon forest location, we test predictions about relative differences in site occupancy by 72 bird
species in 107 OG and 44 mature (18-30 years) SF sites. We grouped species a priori into SF-prone, SFaverse,
and Neutral, i.e. without any predicted occupancy difference between environments. Species
detection data for the whole bird community were collected with autonomous recording devices between
June and October 2010, with temporally replicated visits to each site. Using a hierarchical community
model implemented in a Bayesian framework we explicitly accounted for the possibility of environmentrelated
detection errors and estimated probabilities of site occupancy and detection for each species as
well as for each group. Surprisingly, hypothetical SF-averse species occupied both environments with the
same probability, even though their mean detection probability was lower in SF than in OG. Neutral group
species had the lowest mean SF occupancy of all groups suggesting that our predictions might be based on
limited natural history information. Our results also suggest that even though SF-averse species occupy SF
they may be there in lower numbers than in OG. We conclude that mature SF in the proximity of old
growth does provide habitat for OG species and should be protected. |