Habitat Suitability and Distribution Patterns of Rouget’s rail
(Rougetius rougetii Guérin-méneville, 1843) in Ethiopia.
Abstract
Geographical distribution and diversity patterns of bird species are
influenced by climate change. The Rouget’s rail (Rougetius rougetii) is
a ground-dwelling endemic bird species distributed in Ethiopia and
Eritrea. It is a near-threatened species menaced by habitat loss, one of
the main causes of population declines for bird species. The increasing
effects of climate change may further threaten the species’ survival. So
far, the spatial distribution of this species is not fully documented.
With this study, we develop current potential suitable habitat and
predict the future habitat shift of R. rougetii based on environmental
data such as bioclimatic variables, population density, vegetation
cover, and elevation using ten algorithms. We evaluated the importance
of environmental factors in shaping the bird’s distribution and how it
shifts under climate change scenarios. We used 182 records of R.
rougetii from Ethiopia and nine bioclimatic, population density,
vegetation cover, and elevation variables to run the 10 model
algorithms. Among 10 algorithms, eight were selected for ensembling
models according to their predictive abilities. The current suitable
habitats for R. rougetii were predicted to cover an area of about 82,000
km² despite being highly fragmented. The model suggested that
temperature seasonality (bio4), elevation, and mean daily air
temperatures of the driest quarter (bio9) contributed the most to
delimiting suitable areas for this species. R. rougetii is sensitive to
climate change associated with elevation, leading to a large, shrinking
distribution of suitable areas. The projected spatial and temporal
pattern of habitat loss of R. rougetii suggests the importance of
climate change mitigation and implementing long-term conservation and
management strategies for this threatened endemic bird species.