Landscape composition is the major driver of the taxonomic and functional diversity of tropical frugivorous birds

Bonfim, Fernando César Gonçalves; Dodonov, Pavel; Cazetta, Eliana

doi:10.1007/s10980-021-01266-y

Cited by 23 publications

(12 citation statements)

References 69 publications

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“…As expected, primary forest cover in the landscape increased the number of individuals of toucans and parrots. Our results are consistent with other studies that demonstrated that forest cover—a proxy of habitat amount and the most used landscape composition variable—has stronger effects on the abundance or occurrence of bird species in tropical forests (Bonfim et al, 2021; Carrara et al, 2015; Cerezo et al, 2010; Morante-Filho et al, 2021). Results from this study also support other studies which have demonstrated that some parrot species are more abundant within preserved sites with highest forest cover (De Labra-Hernandez & Renton, 2017; Legault et al, 2011).…”

Section: Discussionsupporting

confidence: 92%

“…Overall, our results suggest that the availability of primary forest in the landscape represents a limiting factor for toucans and parrots, thus adding evidence to the high conservation value of primary forest patches, including the small ones (Fahrig et al, 2019;Wintle et al, 2019). We recommend maintaining primary forest in the landscape, which is consistent with the findings of numerous studies in fragmented tropical landscapes to conserve tropical forest birds (Cerezo et al, 2010;Graham, 2001aGraham, , 2001bPizo & dos Santos, 2011), including frugivores (Bonfim et al, 2021). Moreover, for preserving forest species, landscapes should at least maintain 40% of forest cover, with 30% of forest evenly dispersed (Arroyo-Rodríguez et al, 2020).…”

Section: Implications For Conservationssupporting

confidence: 88%

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Influence of Landscape Structure on Toucans and Parrots in the Fragmented Landscape of Los Tuxtlas, Mexico

Martínez-Ruiz

Labra-Hernández

Bonfim

et al. 2021

Tropical Conservation Science

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Background and Research Aims: Habitat amount plays an important role in determining the presence and abundance of bird species in modified landscapes, whereas habitat fragmentation has shown little effects. Toucans (Ramphastidae) and parrots (Psittacidae) are large-bodied primary consumers and among the most representative birds in Neotropical forests. They are highly sensitive to habitat loss; nevertheless, their response to fragmentation has been poorly assessed leading to contradictory results. Here, we evaluate the influence of landscape structure on toucans and parrots in the tropical forest of Los Tuxtlas, Mexico. Methods: We censused birds in 12 landscapes of Los Tuxtlas and used a multi-scale landscape approach to assess the influence of landscape composition and configuration on the number of individuals of toucans and parrots. Results: We found that the most important and positive predictor of toucans and parrots was the amount of primary forest cover in the landscape. Forest fragmentation had positive effects on the number of toucan individuals, whereas parrots had negative responses to patch density but positive responses to edge density in the landscape. Conclusion: Our results suggest that primary forest loss is the main threat for toucans and parrots in Los Tuxtlas. Implications for conservation: Future conservation and land management must consider the protection of large and small remnants of primary forest and avoid additional forest loss in order to preserve toucan and parrots and their functional roles in human-modified Neotropical landscapes.

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Section: Discussionsupporting

confidence: 92%

Section: Implications For Conservationssupporting

confidence: 88%

Influence of Landscape Structure on Toucans and Parrots in the Fragmented Landscape of Los Tuxtlas, Mexico

Martínez-Ruiz

Labra-Hernández

Bonfim

et al. 2021

Tropical Conservation Science

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“…Landscape composition metrics are considered good predictors of bird species richness and occurrence in human‐modified tropical landscapes (Fahrig, 2013; Morante‐Filho et al, 2021). Also, in previous studies (Bonfim et al, 2021; Morante‐Filho et al, 2021), we detected that landscape composition was more important than configuration in explaining taxonomic and functional diversity and species occurrence of frugivorous birds in the Brazilian Atlantic Forest. We used a classified satellite image with 30‐m resolution freely available for the entire Atlantic Forest by the MapBiomas Project version 5.0 (Souza Jr. et al, 2020).…”

Section: Methodssupporting

confidence: 66%

Land‐use homogenization reduces the occurrence and diversity of frugivorous birds in a tropical biodiversity hotspot

Bonfim,

Galetti,

Benchimol

et al. 2024

Ecological Applications

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Understanding how human‐modified landscapes maintain biodiversity and provide ecosystem services is crucial for establishing conservation practices. Given that responses to land‐use are species‐specific, it is crucial to understand how land‐use changes may shape patterns of species diversity and persistence in human‐modified landscapes. Here, we used a comprehensive data set on bird distribution from the Brazilian Atlantic Forest to understand how species richness and individual occurrences of frugivorous bird species responded to land‐use spatial predictors and, subsequently, assess how ecological traits and phylogeny modulated these responses. Using Bayesian hierarchical modeling, we reveal that the richness of frugivorous birds was positively associated with the amount of native forest and negatively with both agriculture and pasture amount at the landscape scale. Conversely, the effect of these predictors on species occurrence and ecological traits was highly variable and presented a weak phylogenetic signal. Furthermore, land‐use homogenization (i.e., the conversion of forest to pasture or agriculture) led to pervasive consequences for forest‐dependent bird species, whereas several generalist species thrived in deforested areas, replacing those sensitive to habitat disturbances.

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“…In contrast, number of bird species, number of links per species and nestedness respond linearly to forest loss. In forested landscapes the number of frugivorous birds is high (Morante‐Filho et al 2018, Bonfim et al 2021) possibly reflecting the increase in fruit availability and forest structure complexity (Morante‐Filho et al 2018). Our results showed that connectance increases as forest cover increases at the landscape scale.…”

Section: Discussionmentioning

confidence: 99%

Habitat loss shapes the structure and species roles in tropical plant–frugivore networks

Bonfim

Dodonov

Guimarães

et al. 2022

Oikos

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Habitat loss is a global threat to biodiversity with pervasive effects on species and populations. These impacts may generate cascading effects on ecological processes propagating across ecological networks. Thus, understanding how habitat loss affects ecological networks is fundamental for conservation. We used a database of 25 plantfrugivore networks distributed across the whole Brazilian Atlantic Forest to understand how landscape-scale habitat loss shapes network structure, robustness, species role and traits related to seed dispersal. We compared whether these network properties have linear or non-linear relationships and used centrality metrics and indirect effects to evaluate if habitat loss change the role of species in plant-frugivore networks. We found linear and non-linear relationships with negative effects of habitat loss on the network structure. As a consequence of shifts in species richness and number of links, the number of interactions and the proportion of possible interactions observed (connectance) were negatively associated with habitat loss. In contrast, nestedness increased with habitat loss. Network robustness, mean bill width and mean seed size were not significantly related to habitat loss. In addition to changes in interaction patterns at network level, habitat loss also favors changes in interaction among species, shifting the species playing central roles in network organization or contributing to indirect effects in the networks. In forested landscapes, obligate frugivores are the main central species in the network, and the ones potentially contributing to indirect effects, while in deforested landscapes these roles are fulfilled by occasional frugivores. Thus, our results emphasize the widespread effect of habitat loss on plant-frugivore systems, adding evidence that its pervasive effects on biodiversity also proliferate on mutualistic interactions with negative consequences for seed dispersal that potentially go beyond the direct pairs of interacting species.

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Landscape composition is the major driver of the taxonomic and functional diversity of tropical frugivorous birds

Cited by 23 publications

References 69 publications

Influence of Landscape Structure on Toucans and Parrots in the Fragmented Landscape of Los Tuxtlas, Mexico

Influence of Landscape Structure on Toucans and Parrots in the Fragmented Landscape of Los Tuxtlas, Mexico

Land‐use homogenization reduces the occurrence and diversity of frugivorous birds in a tropical biodiversity hotspot

Habitat loss shapes the structure and species roles in tropical plant–frugivore networks

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