Association of dominated tree species in secondary pamah forest of Ponda-Ponda Nature Reserve, South Sulawesi, Indonesia

Abstract

Abstract The Ponda-Ponda Nature Reserve is an apamah vegetation type of secondary forest belonging to a forest conservation area. The objective of this research was to gain information about tree species domination and association in the secondary pamah forest. The collecting data was conducted from December 2020 – March 2021. The primary data was obtained from direct measurements, which tree ≥ 10 cm dbh and 5 m tall censused using multiple plots (20 m × 30 m) by systematic sampling in the line transects. The line transect was placed purposively to represent the plant community. The result showed that six tree species are having high dominance with 15 combination types. The highest dominant species is Nauclea orientalis , with an important index value of 18.56%. There were only two couples that had associations, such as N. orientalis & S. celebica. This pair shows a very strong or very significant association at the 5% level with a value of 4.29. While the view of P. anisophylla & S. celebica only had an association at the 10% level with a value of 3.60. Both of the pairs also have the high index association by Jaccard Index. The association presented that six couples had positive association and six couples had a negative association with a level of dependence ranging from low to high classification. But the others three pairs showed unidentified association types.

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