Palabras clave
Chihuahuan Desert
Diversity
ecology
prairie-to-montain system
rodents
Cómo citar
Resumen
Diversity patterns of rodent communities across elevational ranges have been documented in the Chihuahuan Desert; however, detailed knowledge of local variation in community composition and species turnover remains limited. Because anthropogenic pressures differ among ecosystems, identifying biotic transitions along elevational gradients is critical for effective conservation planning. We assessed rodent diversity across five habitats along an elevational gradient in the Chihuahuan Desert within the Janos Biosphere Reserve, Chihuahua, Mexico. The study encompassed pine and oak forests at higher elevations, scrubland at mid-elevations, and grasslands with and without prairie dogs (Cynomys ludovicianus) at lower elevations. We hypothesized that habitat associations strongly influence rodent community structure across habitat types. Rodent communities were sampled during dry, wet, and winter seasons across elevations ranging from 1300 to 2600 m a.s.l. Species richness, number of dominant species, and species turnover were estimated for each habitat. Our results showed that most communities were unique, with the exception of the two grasslands. Two major rodent community groups were identified: prairie ecosystems, including grasslands and scrublands, and mountain ecosystems, represented by oak and pine forests. Scrublands exhibited the highest species richness (N = 15), containing all grassland species as well as several forest species. In contrast, oak and pine forests were less diverse (N = 6) and dominated by habitat specialists. These findings highlight the importance of conserving all habitats along the elevational gradient to maintain regional rodent diversity and potentially buffer species against climate change.
Citas
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