Measuring multispecies aggregation level by a conspecific-encounter index using line transect data
64th ISI World Statistics Congress - Ottawa, Canada
Format: CPS Abstract
Session: CPS 41 -Environmental statistics III
Tuesday 18 July 8:30 a.m. - 9:40 a.m. (Canada/Eastern)
It is common knowledge that some specific species in an ecological community present aggregate distributions, but this does not necessarily imply that the community as a whole presents an aggregate distribution. Using the conspecific-encounter index derived from the Markov non-independent sampling model, this talk will introduce a legible definition of community-level distributional aggregation as an interspersed or cluster-like distribution of different species. In practical applications, by utilizing the conspecific-encounter index that accounts for the non-independent sampling of consecutive individuals along line transects, the result reveals that tree assemblages in tropical forest ecosystems can present a strong signal of extensive distributional interspersion. By contrast, for the amphibian assemblages, the conspecific-encounter index was consistently high, implying that amphibian communities tend to be highly aggregate in space.