A review of threshold responses of birds to landscape changes across the world
- 18 November 2018
- journal article
- review article
- Published by Resilience Alliance, Inc. in Journal of Field Ornithology
- Vol. 89 (4), 303-314
- https://doi.org/10.1111/jofo.12272
Abstract
Identifying the threshold of habitat cover beyond which species of birds are locally lost is useful for understanding the biological consequences of landscape changes. However, there is little consensus regarding the impact of landscape changes on the likelihood of species extinctions. We conducted a literature search using Scopus and ISI Web of Knowledge databases to identify studies where bird species were used to estimate threshold responses to landscape changes. We obtained a list of 31 papers published from 1994 to 2018, with 24 studies conducted at temperate latitudes and seven in tropical regions. Nineteen studies were based on species‐level assessments, and investigators used a variety of response variables such as probability of detection and occurrence to detect threshold responses. Eight studies were based on communities, and species richness and abundance were primarily used to detect threshold responses. Four studies included both communities and species‐level assessments. Methods used to identify threshold responses varied among studies, but most relied on either regression models to visually identify values from graphs or piecewise regression to estimate a specific threshold value. Although the limited number of studies and their variety of approaches and methods prevented a formal meta‐analysis, we found that mean threshold responses in studies that reported either a range or a single threshold value were 27.9% at temperate latitudes (range = 1.3–90%; N = 11) and 33.6% at tropical latitudes (range = 20–50%; N = 7). Considering only studies where single threshold values were reported, the mean habitat cover threshold was 11% for studies conducted at temperate latitudes (N = 3) and 29.5% for studies in the tropics (N = 4). These crude estimates suggest that tropical species might be more susceptible to habitat loss than temperate species. Although application of the threshold concept is still controversial, the number of studies using this approach is increasing because the results of such studies may have direct application to conservation strategies and restoration of landscapes for bird conservation.Keywords
Funding Information
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do Sul
- Danmarks Grundforskningsfond
- Center for Makroøkologi, Evolution og Klima (DNRF96)
This publication has 61 references indexed in Scilit:
- Biodiversity extinction thresholds are modulated by matrix typeEcography, 2018
- Languages Are Still a Major Barrier to Global SciencePLoS Biology, 2016
- Impacts of mountaintop mining on terrestrial ecosystem integrity: identifying landscape thresholds for avian species in the central Appalachians, United StatesLandscape Ecology, 2014
- Using ecological thresholds to evaluate the costs and benefits of set-asides in a biodiversity hotspotScience, 2014
- A new method for detecting and interpreting biodiversity and ecological community thresholdsMethods in Ecology and Evolution, 2010
- Synergies among extinction drivers under global changeTrends in Ecology & Evolution, 2008
- Thresholds in Songbird Occurrence in Relation to Landscape StructureConservation Biology, 2007
- The effect of habitat loss on a deciduous forest specialist species: the White-backed Woodpecker (Dendrocopos leucotos)Forest Ecology and Management, 2000
- Land use, habitat change and the conservation of birds in fragmented rural environments: a landscape perspective from the Northern Plains, Victoria, AustraliaPacific Conservation Biology, 1997
- Effects of Habitat Fragmentation on Birds and Mammals in Landscapes with Different Proportions of Suitable Habitat: A ReviewOikos, 1994