Biodiversity Sampling Using a Global Acoustic Approach: Contrasting Sites with Microendemics in New Caledonia

摘要: New Caledonia is a Pacific island with unique biodiversity showing an extreme microendemism. Many species distributions observed on this are extremely restricted, localized to mountains or rivers making evaluation and conservation difficult task. A rapid assessment method based acoustics was recently proposed. This could help document the spatial structure in Caledonia. Here, applied attempt reveal differences among three mountain sites (Mandjelia, Koghis Aoupinie) similar ecological features richness level, but high beta diversity according different microendemic assemblages. In each site, several local acoustic communities were sampled audio recorders. An automatic sampling run these for period of 82 successive days. Acoustic properties animal analysed without any identification. frequency spectral complexity index (NP) used as estimate level activity dissimilarity (Df) assessed between pairs recordings. As expected, NP did not significant sites. However, variability estimated by Df, first be explained changes along 24-hour cycle second dissimilarities The results support hypothesis that global analyses can detect context, study also demonstrates methods at broad temporal scales assess challenging context deployed over large areas, compare determine priorities.