Nesting Habitat of the Lilac‐crowned Parrot in a Modified Landscape in Mexico
Identifieur interne : 000842 ( Main/Exploration ); précédent : 000841; suivant : 000843Nesting Habitat of the Lilac‐crowned Parrot in a Modified Landscape in Mexico
Auteurs : Tiberio C. Monterrubio-Rico [Mexique] ; Juan Manuel Ortega-Rodríguez ; Ma. Consuelo Marín-Togo ; Alejandro Salinas-Melgoza [États-Unis] ; Katherine Renton [Mexique]Source :
- Biotropica [ 0006-3606 ] ; 2009-05.
English descriptors
- KwdEn :
Abstract
Parrot populations are being increasingly pressured to occupy modified or fragmented landscapes, yet little is known of the habitat requirements of most species, particularly with regard to the effects on breeding habitat. We evaluated nesting habitat of the lilac‐crowned parrot Amazona finschi in the modified landscape of coastal Michoacan in Mexico. We located 90 parrot nests in 12 tree species in Michoacan, with lilac‐crowned parrots presenting a narrow niche‐breadth of tree species used for nesting. Considering an additional 82 nest trees recorded for lilac‐crowned parrots in Jalisco, we determined a 51 percent similarity in cavity resource use by parrots in the two dry forest regions. Overall, the predominant nest tree species with 76 percent of nests were Astronium graveolens, Piranhea mexicana, Brosimum alicastrum, and Tabebuia spp., all characteristic of semi‐deciduous forest. Only 8 percent of nests occurred in trees characteristic of deciduous forest. Parrots utilized large trees with canopy level cavities as nest sites, and preferred conserved semi‐deciduous forest for nesting, with fewer nests than expected in deciduous forest and transformed agricultural land. Nest areas in semi‐deciduous forest occurred on significantly steeper terrain, as remnant semi‐deciduous forest is restricted to steep ridges and canyons. Those parrot nests in modified habitats and forest patches were located near to continuous forest, with nest trees in open agricultural land being significantly closer to continuous forest than nests in disturbed forest patches. These results demonstrate the importance of conserved semi‐deciduous forest as breeding habitat for the threatened, endemic lilac‐crowned parrot, making wild populations of the species vulnerable to the high rate of transformation and fragmentation of tropical dry forest.
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DOI: 10.1111/j.1744-7429.2009.00493.x
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We evaluated nesting habitat of the lilac‐crowned parrot Amazona finschi in the modified landscape of coastal Michoacan in Mexico. We located 90 parrot nests in 12 tree species in Michoacan, with lilac‐crowned parrots presenting a narrow niche‐breadth of tree species used for nesting. Considering an additional 82 nest trees recorded for lilac‐crowned parrots in Jalisco, we determined a 51 percent similarity in cavity resource use by parrots in the two dry forest regions. Overall, the predominant nest tree species with 76 percent of nests were Astronium graveolens, Piranhea mexicana, Brosimum alicastrum, and Tabebuia spp., all characteristic of semi‐deciduous forest. Only 8 percent of nests occurred in trees characteristic of deciduous forest. Parrots utilized large trees with canopy level cavities as nest sites, and preferred conserved semi‐deciduous forest for nesting, with fewer nests than expected in deciduous forest and transformed agricultural land. Nest areas in semi‐deciduous forest occurred on significantly steeper terrain, as remnant semi‐deciduous forest is restricted to steep ridges and canyons. Those parrot nests in modified habitats and forest patches were located near to continuous forest, with nest trees in open agricultural land being significantly closer to continuous forest than nests in disturbed forest patches. These results demonstrate the importance of conserved semi‐deciduous forest as breeding habitat for the threatened, endemic lilac‐crowned parrot, making wild populations of the species vulnerable to the high rate of transformation and fragmentation of tropical dry forest.</div></front></TEI><affiliations><list><country><li>Mexique</li><li>États-Unis</li></country></list><tree><noCountry><name sortKey="Marin Ogo, Ma Consuelo" sort="Marin Ogo, Ma Consuelo" uniqKey="Marin Ogo M" first="Ma. Consuelo" last="Marín-Togo">Ma. 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