The Morisita index is widely used to evaluate the spatial distribution patterns of species in a native forest. Thus, by analysing the spatial behaviour of individuals in some special cases, this study obtained and then discussed the critical values for the application of the Morisita index. In the aggregate classification, importance was given to the way the equation was used and on the meaning...

SUMMARY A traditional approach for assessing similarity among N (N > 2) communities is to use multiple pairwise comparisons. However, pairwise similarity indices do not completely characterize multiple-community similarity because the information shared by at least three communities is ignored. We propose a new and intuitive two-stage probabilistic approach, which leads to a general framework t...

In this paper we calculate the values of eight pattern detection indices, using different quadrat sizes where individuals of angico above 1.5 m were located, in order to examine their statistical behaviour with increasing sample size. It was concluded that the best index is the standardized Morisita index (Ip) which is completely independent of sample size.

The environmental density has been defined (Morisita (1971, Statistical Ecology, the Pennsylvania State University Press, 379-401)) as the value of a habitat expressing its unfavorableness for settling of an individual which has a strong mutual-repulsive influence to other individuals in an environment. Morisita studied mutual repulsive behavior of ant lions (Glenuroides japanicus) and provided...

An extensive simulation study was conducted to optimize the number, r, of population members to be encountered from each random starting point in variable area transect (VAT) sampling. The quality of estimation provided by the original calculation formula presented by K. R. Parker in 1979 was compared to another formula that was a Morisita analog intended to reduce bias when sampling aggregated...

Ki Aksara merupakan jenis Anggrek tanah yang dilindungi pemerintah. Keberadaan unik ini mulai berkurang karena terjadi perubahan habitat seperti penebangan liar, kebakaran hutan, dan aksi perburuan liar tidak memperhatikan aspek kelestarian. Penelitian dilaksanakan untuk mengetahui distribusi ki di Resort Ranu Darungan Taman Nasional Bromo Tengger Semeru. menjadi tiga blok pengamatan, berdasark...

Crown imperial scattered according to soil structure and organic matter in Zagros regions in Ilam. This plant has been performed an important role in the beautification of environment, tourist attraction and providing of plant essential oils which are used for the production of medicines. The current research was carried out to evaluation spatial distribution pattern of Fritillaria imperialis i...