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Negative impacts of human land use on dung beetle functional diversity

Barragán Torres, Felipe | Moreno Ortega, Claudia Elizabeth [autor/a] | Escobar Sarria, Federico [autor/a] | Halffter Salas, Gonzalo, 1932-2022 [autor/a] | Navarrete Gutiérrez, Darío Alejandro [autor/a].
Tipo de material: Artículo en línea Artículo en línea Tema(s): Escarabajos copronecrófagos | Grupo funcional | Paisajes fragmentados | Población animalTema(s) en inglés: Copro-necrophagous beetle | Functional group | Fragmented landscapes | Animal populationsDescriptor(es) geográficos: Reserva de la Biosfera Montes Azules (Chiapas, México) | Reserva de la Biosfera Los Tuxtlas (Veracruz de Ignacio de la Llave, México) | Reserva de la Biosfera Barranca de Metztitlán (Hidalgo, México) Nota de acceso: Acceso en línea sin restricciones En: PLoS ONE. volumen 6, número 3, e17976 (2011), p, 1-8. --ISSN: 1932-6203Número de sistema: 41773Resumen:
Inglés

The loss of biodiversity caused by human activity is assumed to alter ecosystem functioning. However our understanding of the magnitude of the effect of these changes on functional diversity and their impact on the dynamics of ecological processes is still limited. We analyzed the functional diversity of copro-necrophagous beetles under different conditions of land use in three Mexican biosphere reserves. In Montes Azules pastures, forest fragments and continuous rainforest were analyzed, in Los Tuxtlas rainforest fragments of different sizes were analyzed and in Barranca de Metztitlán two types of xerophile scrub with different degrees of disturbance from grazing were analyzed. We assigned dung beetle species to functional groups based on food relocation, beetle size, daily activity period and food preferences, and as measures of functional diversity we used estimates based on multivariate methods. In Montes Azules functional richness was lower in the pastures than in continuous rainforest and rainforest fragments, but fragments and continuous forest include functionally redundant species. In small rainforest fragments (<5 ha) in Los Tuxtlas, dung beetle functional richness was lower than in large rainforest fragments (>20 ha). Functional evenness and functional dispersion did not vary among habitat types or fragment size in these reserves. In contrast, in Metztitlán, functional richness and functional dispersion were different among the vegetation types, but differences were not related to the degree of disturbance by grazing. More redundant species were found in submontane than in crassicaule scrub.

For the first time, a decrease in the functional diversity in communities of copro-necrophagous beetles resulting from changes in land use is documented, the potential implications for ecosystem functioning are discussed and a series of variables that could improve the evaluation of functional diversity for this biological group is proposed.

Recurso en línea: http://www.uaeh.edu.mx/investigacion/icbi/LI_DiversidadBiol/claudia_moreno/PLosONE.pdf
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Acceso en línea sin restricciones

The loss of biodiversity caused by human activity is assumed to alter ecosystem functioning. However our understanding of the magnitude of the effect of these changes on functional diversity and their impact on the dynamics of ecological processes is still limited. We analyzed the functional diversity of copro-necrophagous beetles under different conditions of land use in three Mexican biosphere reserves. In Montes Azules pastures, forest fragments and continuous rainforest were analyzed, in Los Tuxtlas rainforest fragments of different sizes were analyzed and in Barranca de Metztitlán two types of xerophile scrub with different degrees of disturbance from grazing were analyzed. We assigned dung beetle species to functional groups based on food relocation, beetle size, daily activity period and food preferences, and as measures of functional diversity we used estimates based on multivariate methods. In Montes Azules functional richness was lower in the pastures than in continuous rainforest and rainforest fragments, but fragments and continuous forest include functionally redundant species. In small rainforest fragments (<5 ha) in Los Tuxtlas, dung beetle functional richness was lower than in large rainforest fragments (>20 ha). Functional evenness and functional dispersion did not vary among habitat types or fragment size in these reserves. In contrast, in Metztitlán, functional richness and functional dispersion were different among the vegetation types, but differences were not related to the degree of disturbance by grazing. More redundant species were found in submontane than in crassicaule scrub. eng

For the first time, a decrease in the functional diversity in communities of copro-necrophagous beetles resulting from changes in land use is documented, the potential implications for ecosystem functioning are discussed and a series of variables that could improve the evaluation of functional diversity for this biological group is proposed. eng

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