Integrated distance sampling models for simple point counts

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

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Dangosydd eitem ddigidol (DOI)

  • Marc Kery
    Swiss Ornithological Institute
  • J. Andrew Royle
    USGS Eastern Ecological Science Center, Maryland.
  • Tyler Hallman
  • W. Douglas Robinson
    Marine Mammal Institute, Hatfield Marine Science Center, Oregon State University, Newport, Oregon
  • Nicolas Strebel
    Swiss Ornithological Institute
  • Kenneth F. Kellner
    Michigan State University
AbstractPoint counts (PCs) are widely used in biodiversity surveys but, despite numerous advantages, simple PCs suffer from several problems: detectability, and therefore abundance, is unknown; systematic spatiotemporal variation in detectability yields biased inferences, and unknown survey area prevents formal density estimation and scaling‐up to the landscape level. We introduce integrated distance sampling (IDS) models that combine distance sampling (DS) with simple PC or detection/nondetection (DND) data to capitalize on the strengths and mitigate the weaknesses of each data type. Key to IDS models is the view of simple PC and DND data as aggregations of latent DS surveys that observe the same underlying density process. This enables the estimation of separate detection functions, along with distinct covariate effects, for all data types. Additional information from repeat or time‐removal surveys, or variable survey duration, enables the separate estimation of the availability and perceptibility components of detectability with DS and PC data. IDS models reconcile spatial and temporal mismatches among data sets and solve the above‐mentioned problems of simple PC and DND data. To fit IDS models, we provide JAGS code and the new “IDS()” function in the R package unmarked. Extant citizen‐science data generally lack the information necessary to adjust for detection biases, but IDS models address this shortcoming, thus greatly extending the utility and reach of these data. In addition, they enable formal density estimation in hybrid designs, which efficiently combine DS with distance‐free, point‐based PC or DND surveys. We believe that IDS models have considerable scope in ecology, management, and monitoring.
Iaith wreiddiolSaesneg
Rhif yr erthygle4292
CyfnodolynEcology
Cyfrol105
Rhif y cyfnodolyn5
Dyddiad ar-lein cynnar27 Maw 2024
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 27 Maw 2024

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