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Masting effect on alpha and beta avian diversity in fragmented forests of relict?endangered Mexican Beech(Fagus grandifolia ***)

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Avian Research 2021年第4期12卷 576-590页

作者： Ernesto CRodríguez-Ramírez levinn camacho-islas Ana Paola Martínez-Falcón Isolda Luna-Vega Pilar Carbó-Ramírez Laboratorio de Dendrocronología Universidad ContinentalHuancayoPerú Laboratorio de Biogeografía y Sistemática Universidad Nacional Autonoma de MéxicoCiudad de MéxicoMexico Centro de Investigaciones Biológicas Universidad Autónoma de Estado de HidalgoHidalgoMexico Independent Researcher OuluFinland

Background:Tropical montane cloud forests are one of the most important hotspots on Earth and show presence of relict-endemic and endangered species,representing about 14%of the total tropical forest *** seed production or masting in tropical montane cloud tree species is a widespread reproductive strategy of decidu-ous and evergreen broad-leaved tree associations to decrease costs of reproduction and ensure *** event maintains a high avian diversity,which can be modified by phenological process(seed production and non-seed production).Methods:The main aim of this study was to assess alpha and beta avian diversity and whether the composition of the trophic guild modifies among phenological processes and between two fragmented relict-endangered Mexican Beech(Fagus grandifolia ***)forests(Medio Monte and El Gosco)in the Mexican state of *** addi-tion,we evaluated beechnut ***:We recorded 36 bird species,11 of them included in some conservation risk status,and 5 endemic *** diversity values were dissimilar in avian richness(q=0)among phenological processes and between frag-mented beech *** communities among three phenological processes and between fragmented forests were structurally similar,dominated during immature seeds the Brown-backed Solitaire(granivores-insectivores-frugivores);during mature seeds the White-crowned Parrot(Pionus senilis,granivores-frugivores);and the Dwarf Jay(Cyanolyca nana,insectivores)was abundant during low seed *** complementarity index was high among phenological processes and low between *** found a high bird turnover value between immature seeds—mature seeds and during mature seeds—low seed ***,a similar pattern was recorded between the two study *** production showed a high number of undamaged beechnuts in Medio Monte,while in El Gosco beechnuts were attacked by ***:Our results reflect that masting

关键词： Avian seed consumers Bird species Synchronous seed production Tropical montane cloud forest Turnover Zentrygon albifacies

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