Cristian Barros‐Diaz, Abel Gallo‐Pérez, Manuel Chiquito, Pamela León · 7 authors
The Cordillera Chongón Colonche, part of the Tumbes-Chocó-Magdalena biodiversity hotspot, is known for its abundance of endemic species. Our research was conducted in six protected areas, including mature and secondary forests. We utilized a grid of camera traps spaced at an average distance of 1.2 km, totaling 8819 camera-days. The data yielded 5413 independent events which recorded 29 species of mammals, including 23 native and six introduced species. Based on the documented diversity, conservation status of native mammals, and anthropogenic pressures, we propose the Cordillera Chongón Colonche as a priority area for mammal conservation in western Ecuador. This study provides updated information on mammal presence in the area and represents the first systematized camera-trap study along the mountain range. Furthermore, we strongly recommend the development of a comprehensive management plan for the mountain range. This plan would enhance existing conservation strategies in certain communal forests while also facilitating the reconnection of the mountain range with the Chocó Region. To achieve this, we advocate for the implementation of participatory projects involving local communities, decentralized autonomous provincial and cantonal governments, and non-profit organizations actively working in the area. This collaborative approach would create synergies, fostering more effective and sustainable conservation efforts.
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David L. Roberts, Chris S. Elphick, J. Michael Reed
As species become very rare and approach extinction, purported sightings can stir controversy, especially when scarce management resources are at stake. We used quantitative methods to identify reports that do not fit prior sighting patterns. We also examined the effects of including records that meet different evidentiary standards on quantitative extinction assessments for four charismatic bird species that might be extinct: Eskimo Curlew (Numenius borealis), Ivory-billed Woodpecker (Campephilus principalis), Nukupu'u (Hemignathus lucidus), and O'ahu 'Alauahio (Paroreomyza maculata). For all four species the probability of there being a valid sighting today, given the past pattern of verified sightings, was estimated to be very low. The estimates of extinction dates and the chance of new sightings, however, differed considerably depending on the criteria used for data inclusion. When a historical sighting record lacked long periods without sightings, the likelihood of new sightings declined quickly with time since the last confirmed sighting. For species with this type of historical record, therefore, new reports should meet an especially high burden of proof to be acceptable. Such quantitative models could be incorporated into the International Union for Conservation of Nature's Red List criteria to set evidentiary standards required for unconfirmed sightings of "possibly extinct" species and to standardize extinction assessments across species.