Noticias Noticias

Ecotourism as a data source on rare species

Monitoring long-term trends in population size is important for species' conservation assessments. However, it may be unfeasible for rare species, for which past records are typically sparse. In this study, the potential of birding trip reports as an underappreciated source of biological information to monitor rare species was investigated. For this purpose, the Peruvian thick-knee, a cryptic gregarious species, was used as an example to assess population trends over 2000?2010, using flock size dynamics as a proxy. All observations of thick-knees that could be accessed from trip reports across the entire geographic range of the species were collected. Overall, this search yielded 218 records of 2403 individuals, of which 73.9% were fully useable for this study. Mean flock size declined slightly over the study period in Lima (Central Peru), whereas in Tarapacá (North Chile), it increased at the beginning of the decade and then decreased nearly 90% until the end of the study period. This suggests that, at least at the southernmost part of the distribution range of the thick-knee, the magnitude and speed of the change in population size could be sufficient to qualify for a threatened category. Compared to other sources, nature trip reports seem a promising data source for monitoring rare species, since sightings of sought-after species are increasingly posted online as a form of tourist attraction. This study highlights the great utility that trip reports freely available online may have to provide retrospective data on rare species that would otherwise be impossible to collect. Nonetheless, they might not be universally valid due to species-specific differences and possible lack of non detection records. Potential biases due to varying sampling effort or detectability should also be carefully considered. information[at]ebd.csic.es: Camacho (2016) Birding trip reports as a data source for monitoring rare species. Anim Conserv DOI:10.1111/acv.12258


http://onlinelibrary.wiley.com/doi/10.1111/acv.12258/abstract
Promedio (0 Votos)

Últimas noticias Últimas noticias

Marabuntas de hormigas legionarias en los nidos de Tortugas de Laúd

La mortalidad de los huevos es uno de los principales factores que afectan a la historia de la vida y la conservación de especies ovíparas. Se describe una colonización masiva y críptica de muchos...

El impacto humano ha contribuido al declive del lince boreal en Europa

Entender la contribución de los procesos evolutivos a largo plazo y los recientes impactos antropogénicos a las actuales pautas genéticas de las especies silvestres es fundamental para evaluar los...

Una elevada presión ganadera influye negativamente en la condición corporal del guirre canario

Rasgos individuales como la masa corporal pueden servir como señales de alerta temprana de cambios en la salud de poblaciones de animales que se enfrentan a impactos ambientales. Un estudio sobre...

Comprender las complejas relaciones entre las características ecológicas y los patrones de distribución espacial

El estudio de la relación entre la amplitud del nicho ecológico y la distribución espacial de las especies ha sido un tema central en la ecología. La amplitud del nicho ecológico mide el grado de...