Bird conservation and biodiversity research in Mexico: status and priorities

Peterson, A. Townsend; Navarro‐Sigüenza, Adolfo G.

doi:10.1111/jofo.12146

Cited by 19 publications

(10 citation statements)

References 37 publications

(52 reference statements)

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“…the Imperial Woodpecker Campephilus imperialis and Slender-billed Grackle Quiscalus palustris) have been lost within the last century, and many more are critically endangered (Townsend Peterson & Navarro-Siguenza, 2016). the Imperial Woodpecker Campephilus imperialis and Slender-billed Grackle Quiscalus palustris) have been lost within the last century, and many more are critically endangered (Townsend Peterson & Navarro-Siguenza, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Within Mexico, several bird species (e.g. the Imperial Woodpecker Campephilus imperialis and Slender-billed Grackle Quiscalus palustris) have been lost within the last century, and many more are critically endangered (Townsend Peterson & Navarro-Siguenza, 2016). Protected areas can be of conservation value if they protect such vulnerable species, or species undergoing population declines or expansions under climate change (e.g.…”

Section: Discussionmentioning

confidence: 99%

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Impacts of habitat change and protected areas on alpha and beta diversity of Mexican birds

Hiley

Bradbury

Thomas

2016

Diversity and Distributions

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Aims To investigate how habitat change and different levels of protection interact to determine variation in the (alpha and beta) diversity of bird communities in three bioclimatic zones, considering the impacts of non-native species, and the contribution of these effects to global (gamma) diversity.Location Sierra Gorda Biosphere Reserve, central Mexico.Methods We carried out bird surveys in a number of locations which varied according to their underlying vegetation type, their level of protection and the degree to which they had undergone modification by humans. We conducted a range of analyses to determine the impacts of protection and modification on the richness and mean global population trends of the species found in each location. We compared community composition to assess the homogenization effect of habitat modification.Results Human-modified environments in each of three bioclimatic zones held significantly greater numbers of species (alpha diversity) than unmodified habitats. Human-mediated changes to local bird communities altered patterns of beta diversity in opposite directions; communities across bioclimatic zones were more similar to one another in modified areas than in unmodified areas but, on a local scale, modification of vegetation increased community dissimilarity. The changes are likely to contribute to a decline in global (gamma) diversity, given that globally vulnerable (declining) birds were mostly associated with unmodified, strictly protected areas.Main conclusions We highlight that assessment of human impacts and conservation need depends on the metric of biodiversity used and scale considered: small-scale habitat change increased local and regional avian diversity but strictly protected areas are still required to protect globally vulnerable species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Impacts of habitat change and protected areas on alpha and beta diversity of Mexican birds

Hiley

Bradbury

Thomas

2016

Diversity and Distributions

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“…Brook et al (2006) argue that afforestation via secondary forest succession may be a poor substitute for primary forest, particularly for the fraction of species that depend on primary old-growth forest, and do not persist in disturbed tropical forest (Peh et al 2005). This makes it essential to implement strategies and incentives to conserve primary tropical moist forest in relatively undisturbed regions such as Los Chimalapas (Peterson and Navarro Sigüenza 2016), and reduce the rate of conversion to secondary forest, if we are to maintain populations of large forest-dependent species in the long term. …”

Section: Discussionmentioning

confidence: 99%

Factors influencing density of the Northern Mealy Amazon in three forest types of a modified rainforest landscape in Mesoamerica

Labra-Hernández¹,

Renton²

2017

ACE

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ABSTRACT. The high rate of conversion of tropical moist forest to secondary forest makes it imperative to evaluate forest metric relationships of species dependent on primary, old-growth forest. The threatened Northern Mealy Amazon (Amazona guatemalae) is the largest mainland parrot, and occurs in tropical moist forests of Mesoamerica that are increasingly being converted to secondary forest. However, the consequences of forest conversion for this recently taxonomically separated parrot species are poorly understood. We measured forest metrics of primary evergreen, riparian, and secondary tropical moist forest in Los Chimalapas, Mexico. We also used point counts to estimate density of Northern Mealy Amazons in each forest type during the nonbreeding (Sept 2013) and breeding (March 2014) seasons. We then examined how parrot density was influenced by forest structure and composition, and how parrots used forest types within tropical moist forest. Overall, parrot density was high in the breeding season, with few parrots present during the nonbreeding season. During the breeding season, primary forest had significantly greater density of 18.9 parrots/km² in evergreen forest and 35.9 parrots/km² in riparian forest, compared with only 3.4 parrots/km² in secondary forest. Secondary forest had significantly lower tree species richness, density, diameter, total height, and major branch ramification height, as well as distinct tree species composition compared with both types of primary forest. The number of parrots recorded at point counts was related to density of large, tall trees, characteristic of primary forest, and parrots used riparian forest more than expected by availability. Hence, the increased conversion of tropical moist forest to secondary forest is likely to lead to reduced densities of forest-dependent species such as the Northern Mealy Amazon. Furthermore, the species' requirement for primary tropical moist forest highlights the need to reevaluate conservation status of the Northern Mealy Amazon, and implement strategies to reduce forest conversion.Facteurs influant sur la densité de l'Amazone guatémaltèque dans trois types forestiers d'un paysage altéré en forêt pluviale de Méso-Amérique RÉSUMÉ. Le taux élevé de conversion des forêts tropicales humides en forêts secondaires rend impératif l'évaluation des relations entre les paramètres forestiers et les espèces dépendantes des vieilles forêts primaires. L'Amazone guatémaltèque (Amazona guatemalae), espèce menacée, est le plus gros perroquet continental; cette amazone s'observe dans les forêts tropicales humides mésoaméricaines, qui subissent de plus en plus de conversion en forêts secondaires. Cependant, les conséquences de la conversion forestière sur cette espèce, qu'on vient de séparer taxinomiquement, sont mal connues. Nous avons mesuré les paramètres dans des peuplements primaires de forêt tropicale humide d'arbres à feuillage persistant et riparienne, ainsi que dans des peuplements secondaires de forêt tropicale humide dans la région de Los Chimal...

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“…As a consequence, mammal species that depend on forest or other woody vegetation have declined (Briones-Salas et al, 2015). Nevertheless, the state of Tabasco contains some of the most biodiverse ecosystems in this megadiverse country (Peterson and Navarro-Sigüenza, 2016). Beginning in the late-1980s, a combination of global demand and government incentives spurred many farmers to begin planting oil palm, primarily in areas that had previously been cleared for cattle or other row crops.…”

Section: Introductionmentioning

confidence: 99%

Mammal Diversity in Oil Palm Plantations and Forest Fragments in a Highly Modified Landscape in Southern Mexico

Knowlton

Mata-Zayas

Ripley

et al. 2019

Front. For. Glob. Change

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Oil palm (Elaeis guineensis) plantations are one of the most rapidly expanding agroecosystems in the tropics, including Latin America. While many studies have demonstrated that large oil palm monocultures (>100 ha) are detrimental to biodiversity, including mammals, little is known about the impact of small-scale oil palm plantations, especially in the Neotropics. Here we used a camera trapping survey to compare species richness, community structure, and relative abundances of mid to large-bodied terrestrial mammals in small-scale oil palm plantations (<100 ha) and secondary forest fragments within a highly modified landscape mosaic in the southeastern lowlands of Tabasco, Mexico. Contrary to our expectations, we found no differences in the overall mammal communities between the oil palm and forest fragments, including species richness or mean relative abundance. Individual species showed some apparent differences in their total detections between the two habitats, with 11 having greater detections in forest than oil palm, and only two with greater detections in oil palm. Further, oil palm sites were more similar to one another in terms of mammal community structure than the secondary forest fragments. We found that shorter distance to forest patches was related to higher mammal species richness in both forest fragments and oil palm plantations. Twelve terrestrial mammal species known to occur in forested areas in the state of Tabasco were never detected in either vegetation type in our surveys, highlighting the fact that the mammal community in this landscape had already been reduced to those species most resilient to human disturbance. Our findings suggest that small-scale oil palm plantations in this region are used at least to some degree by most mammals that are also found in the remaining secondary forest fragments in this landscape, but that access to nearby forest is important for these species. In order to recover more of the original mammal community of the region and prevent further reductions in biodiversity, conservation priorities should center around reducing hunting pressure, allowing forest regeneration and increasing connectivity between protected areas and along waterways.

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Bird conservation and biodiversity research in Mexico: status and priorities

Cited by 19 publications

References 37 publications

Impacts of habitat change and protected areas on alpha and beta diversity of Mexican birds

Impacts of habitat change and protected areas on alpha and beta diversity of Mexican birds

Factors influencing density of the Northern Mealy Amazon in three forest types of a modified rainforest landscape in Mesoamerica

Mammal Diversity in Oil Palm Plantations and Forest Fragments in a Highly Modified Landscape in Southern Mexico

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