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Effects of past and present livestock grazing on herpetofauna in a landscape-scale experiment.
Kay, Geoffrey M; Mortelliti, Alessio; Tulloch, Ayesha; Barton, Philip; Florance, Daniel; Cunningham, Saul A; Lindenmayer, David B.
Afiliación
  • Kay GM; Fenner School of Environment and Society, The Australian National University, Canberra, ACT, 0200, Australia.
  • Mortelliti A; Fenner School of Environment and Society, The Australian National University, Canberra, ACT, 0200, Australia.
  • Tulloch A; Department of Wildlife, Fisheries, and Conservation Biology, University of Maine, 5755 Nutting Hall, Orono, ME, 04469-5755, U.S.A.
  • Barton P; Fenner School of Environment and Society, The Australian National University, Canberra, ACT, 0200, Australia.
  • Florance D; Fenner School of Environment and Society, The Australian National University, Canberra, ACT, 0200, Australia.
  • Cunningham SA; Fenner School of Environment and Society, The Australian National University, Canberra, ACT, 0200, Australia.
  • Lindenmayer DB; CSIRO Land and Water, Canberra, ACT, 0200, Australia.
Conserv Biol ; 31(2): 446-458, 2017 04.
Article en En | MEDLINE | ID: mdl-27314208
Livestock grazing is the most widespread land use on Earth and can have negative effects on biodiversity. Yet, many of the mechanisms by which grazing leads to changes in biodiversity remain unresolved. One reason is that conventional grazing studies often target broad treatments rather than specific parameters of grazing (e.g., intensity, duration, and frequency) or fail to account for historical grazing effects. We conducted a landscape-scale replicated grazing experiment (15,000 km2 , 97 sites) to examine the impact of past grazing management and current grazing regimes (intensity, duration, and frequency) on a community of ground-dwelling herpetofauna (39 species). We analyzed community variables (species richness and composition) for all species and built multiseason patch-occupancy models to predict local colonization and extinction for the 7 most abundant species. Past grazing practices did not influence community richness but did affect community composition and patch colonization and extinction for 4 of 7 species. Present grazing parameters did not influence community richness or composition, but 6 of the 7 target species were affected by at least one grazing parameter. Grazing frequency had the most consistent influence, positively affecting 3 of 7 species (increased colonization or decreased extinction). Past grazing practice affected community composition and population dynamics in some species in different ways, which suggests that conservation planners should examine the different grazing histories of an area. Species responded differently to specific current grazing practices; thus, incentive programs that apply a diversity of approaches rather than focusing on a change such as reduced grazing intensity should be considered. Based on our findings, we suggest that determining fine-scale grazing attributes is essential for advancing grazing as a conservation strategy.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reptiles / Conservación de los Recursos Naturales / Biodiversidad / Ganado / Herbivoria Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Conserv Biol Año: 2017 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reptiles / Conservación de los Recursos Naturales / Biodiversidad / Ganado / Herbivoria Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Conserv Biol Año: 2017 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Estados Unidos