Modelling density surfaces from integrated passive acoustic and point count data streams
Camp RJ, Pedersen EJ, Bak T, Navine A, Warren C, Judge SW, Hart PJ, Berio Fortino L. 2026. Modelling density surfaces from integrated passive acoustic and point count data streams. Methods in Ecology and Evolution. Online Pre-Release:1-15
Population monitoring is a critical tool for effective conservation, especially for rare and endangered species, providing a means to detect population declines that could indicate increased extinction risk (IUCN, 2012) and assess the efficacy of management actions that seek to preserve threatened species. An ideal population monitoring scheme is one that provides unbiased and precise estimates of both population size and population trends at spatially relevant scales, while minimizing sampling effort to generate cost-effective and reliable population assessments to inform conservation decisions. Design-based distance sampling methods are a popular tool for spatiotemporal population monitoring as they can be used to translate observer-based point counts of individuals to estimates of local population density or regional abundance. Distance sampling methods estimate the effective area sampled by incorporating a detection probability component into the model that accounts for the possibility of present but undetected individuals (Buckland et al., 2015). In Hawaii, the standard method for monitoring forest birds has been point-transect distance sampling methods (PTDS), a form of distance sampling, since the Hawaiian Forest Bird Surveys of the 1970s and 1980s (Scott et al., 1986).
- Type
- Journal Article
- Authors
- Camp, Richard; Pedersen, Eric; Bak, Trevor; Navine, Amanda; Warren, Christopher; Judge, Seth; Hart, Patrick; Berio Fortino, Lucas
- Units
- HALE , PACN
- Keywords
- density surface model, distance sampling, endangered species, forest birds, Hawaiian birds, Kipahulu Valley, landbird monitoring, landbirds monitoring report, Maui, native birds, passive acoustic monitoring, point counts, population monitoring, rare species
- Subjects
- Ecological Framework: Biological Integrity | Focal Species or Communities | Birds