Patch and landscape responses of bird abundance to fragmentation in agroecosystems of east-central Argentina

Avian Conservation and Ecology
By: , and 

Links

Abstract

Forest fragmentation in agroecosystems is linked to declines of avian species worldwide. Agriculture has greatly reduced native forest cover in east-central Argentina. Assessing the influence of fragmentation on forest bird populations is vital to inform reliable conservation and management strategies for the Espinal region of Argentina. We determined the relationships of vegetation structure within native forest patches, size and shape of these patches (patch scale), composition and spatial configuration (at landscape scale) to relative abundance of 17 forest bird species during austral fall-winter and spring-summer seasons. Birds were sampled from 2007 – 2009 in 45 forest patches within three landscape mosaics (30x30 km) representing a gradient of native forest fragmentation in east-central Argentina. We used an information-theoretic approach and approximated model inference to examine the effect of predictor environmental variables at two spatial scales on patterns of forest bird abundance. Density of trees within forest patches was the main predictor of bird abundance at the patch scale. Amount of forest and spatial configuration were also important. The abundance of several bird species was greater in patches with high density of trees and landscapes characterized by more forest cover and larger patches in close proximity. We found two main avian response patterns to forest fragmentation and patch characteristics. This information contributes reliable knowledge for the design of conservation measures of agricultural landscapes in the Espinal region of Argentina.

Study Area

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Patch and landscape responses of bird abundance to fragmentation in agroecosystems of east-central Argentina
Series title Avian Conservation and Ecology
DOI 10.5751/ACE-01222-130203
Volume 13
Issue 2
Year Published 2018
Language English
Publisher Avian Conservation and Ecology
Contributing office(s) Coop Res Unit Atlanta
Description 3 p.
Country Argentina