Limits...
Multi-Season Regional Analysis of Multi-Species Occupancy: Implications for Bird Conservation in Agricultural Lands in East-Central Argentina.

Goijman AP, Conroy MJ, Bernardos JN, Zaccagnini ME - PLoS ONE (2015)

Bottom Line: Rapid expansion and intensification of agriculture create challenges for the conservation of biodiversity and associated ecosystem services.Overall our results support the predictions.Continuation of the bird monitoring program will allow us to continue to inform for conservation of birds in agroecosystems, identify research needed to reduce key uncertainties, and anticipate the effects of changes in agriculture in central Argentina.

View Article: PubMed Central - PubMed

Affiliation: Instituto de Recursos Biológicos, CIRN, Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina; D.B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA United States of America.

ABSTRACT
Rapid expansion and intensification of agriculture create challenges for the conservation of biodiversity and associated ecosystem services. In Argentina, the total row crop planted area has increased in recent decades with the expansion of soybean cultivation, homogenizing the landscape. In 2003 we started the first long-term, large-scale bird monitoring program in agroecosystems of central Argentina, in portions of the Pampas and Espinal ecoregions. Using data from this program, we evaluated the effect of land use and cover extent on birds between 2003-2012, accounting for imperfect detection probabilities using a Bayesian hierarchical, multi-species and multi-season occupancy model. We tested predictions that species diversity is positively related to habitat heterogeneity, which in intensified agroecosystems is thought to be mediated by food availability; thus the extent of land use and cover is predicted to affect foraging guilds differently. We also infer about ecosystem services provisioning and inform management recommendations for conservation of birds. Overall our results support the predictions. Although many species within each guild responded differently to land use and native forest cover, we identified generalities for most trophic guilds. For example, granivorous gleaners, ground insectivores and omnivores responded negatively to high proportions of soybean, while insectivore gleaners and aerial foragers seemed more tolerant. Habitat heterogeneity would likely benefit most species in an intensified agroecosystem, and can be achieved with a diversity of crops, pastures, and natural areas within the landscape. Although most studied species are insectivores, potentially beneficial for pest control, some guilds such as ground insectivores are poorly represented, suggesting that agricultural intensification reduces ecological functions, which may be recovered through management. Continuation of the bird monitoring program will allow us to continue to inform for conservation of birds in agroecosystems, identify research needed to reduce key uncertainties, and anticipate the effects of changes in agriculture in central Argentina.

No MeSH data available.


Related in: MedlinePlus

Regional bird monitoring program, indicating monitored routes, as of 2006–2012, covering an area 255,000 km2, over parts of Entre Ríos, Santa Fe, Córdoba, La Pampa and Buenos Aires provinces, Argentina.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4472512&req=5

pone.0130874.g001: Regional bird monitoring program, indicating monitored routes, as of 2006–2012, covering an area 255,000 km2, over parts of Entre Ríos, Santa Fe, Córdoba, La Pampa and Buenos Aires provinces, Argentina.

Mentions: In January each year from 2003 to 2012 (austral bird breeding season) we surveyed 47, 64 and 90 transects (2003–04, 2005, 2006–12, respectively) (Fig 1). Since transects were located along unpaved secondary and tertiary public roads, no specific permissions were required. Field studies did not involve endangered or protected species.


Multi-Season Regional Analysis of Multi-Species Occupancy: Implications for Bird Conservation in Agricultural Lands in East-Central Argentina.

Goijman AP, Conroy MJ, Bernardos JN, Zaccagnini ME - PLoS ONE (2015)

Regional bird monitoring program, indicating monitored routes, as of 2006–2012, covering an area 255,000 km2, over parts of Entre Ríos, Santa Fe, Córdoba, La Pampa and Buenos Aires provinces, Argentina.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4472512&req=5

pone.0130874.g001: Regional bird monitoring program, indicating monitored routes, as of 2006–2012, covering an area 255,000 km2, over parts of Entre Ríos, Santa Fe, Córdoba, La Pampa and Buenos Aires provinces, Argentina.
Mentions: In January each year from 2003 to 2012 (austral bird breeding season) we surveyed 47, 64 and 90 transects (2003–04, 2005, 2006–12, respectively) (Fig 1). Since transects were located along unpaved secondary and tertiary public roads, no specific permissions were required. Field studies did not involve endangered or protected species.

Bottom Line: Rapid expansion and intensification of agriculture create challenges for the conservation of biodiversity and associated ecosystem services.Overall our results support the predictions.Continuation of the bird monitoring program will allow us to continue to inform for conservation of birds in agroecosystems, identify research needed to reduce key uncertainties, and anticipate the effects of changes in agriculture in central Argentina.

View Article: PubMed Central - PubMed

Affiliation: Instituto de Recursos Biológicos, CIRN, Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina; D.B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA United States of America.

ABSTRACT
Rapid expansion and intensification of agriculture create challenges for the conservation of biodiversity and associated ecosystem services. In Argentina, the total row crop planted area has increased in recent decades with the expansion of soybean cultivation, homogenizing the landscape. In 2003 we started the first long-term, large-scale bird monitoring program in agroecosystems of central Argentina, in portions of the Pampas and Espinal ecoregions. Using data from this program, we evaluated the effect of land use and cover extent on birds between 2003-2012, accounting for imperfect detection probabilities using a Bayesian hierarchical, multi-species and multi-season occupancy model. We tested predictions that species diversity is positively related to habitat heterogeneity, which in intensified agroecosystems is thought to be mediated by food availability; thus the extent of land use and cover is predicted to affect foraging guilds differently. We also infer about ecosystem services provisioning and inform management recommendations for conservation of birds. Overall our results support the predictions. Although many species within each guild responded differently to land use and native forest cover, we identified generalities for most trophic guilds. For example, granivorous gleaners, ground insectivores and omnivores responded negatively to high proportions of soybean, while insectivore gleaners and aerial foragers seemed more tolerant. Habitat heterogeneity would likely benefit most species in an intensified agroecosystem, and can be achieved with a diversity of crops, pastures, and natural areas within the landscape. Although most studied species are insectivores, potentially beneficial for pest control, some guilds such as ground insectivores are poorly represented, suggesting that agricultural intensification reduces ecological functions, which may be recovered through management. Continuation of the bird monitoring program will allow us to continue to inform for conservation of birds in agroecosystems, identify research needed to reduce key uncertainties, and anticipate the effects of changes in agriculture in central Argentina.

No MeSH data available.


Related in: MedlinePlus