Abstract
The activities of the community around the peat swamp forest cause disruption of the ecosystem from the sustainability of the forest area's resources. Land clearing and peatland fires also affect the presence of ferns. The new environmental conditions due to changes in land cover cause ferns to be affected by these changes. Kuala Dua Village Kubu Raya Regency has secondary peat swamp forest and open peat land due to fires 3-4 years earlier so it is overgrown with a variety of new types of flora, one of which is a type of fern. The objective of the study is to describe species diversity of ferns and their site conditions in secondary peat swamp forests and open peatlands of Kuala Dua Village, Kubu Raya District. This research was conducted with survey method using multiple plot samples. The plots determination was done by purposive sampling which was taken place on the site where there were many species of ferns land. Three plots were on each land covered condition with a plot size of 5 m x 5 m that divided into 25 of a 1 m x 1 m sub plots. The results show that 5 species of ferns found in peat swamp forest and 4 species of ferns were found on open peatlands. The species that has the highest INP value in the forest was Asplenium belangeri and the species that has the INP value in open peatland was Nephrolefis falcata. Dominant Index, Spesies Diversity Index and Spesies Abudance Index were 0,12 and 0,18; 0,30 and 0,36; 0,51 and 0,52 on the forest and open peatland respectively. The Similarity Index value (IS) of ferns in secondary peat swamp forest and open peatland is 44%. The study shows dissimility of species fern in peat swamp forests and open peatlands.Keywords: Open peatland, Pteridophyta, secondary peat swamp forest
Highlights
PENDAHULUAN Indonesia merupakan salah satu negara yang memiliki keanekaragaman hayati tumbuhan tertinggi di dunia, salah satu jenis tumbuhan yang banyak hidup di hutan Indonesia adalah tumbuhan pakupakuan (Pteridophyta) (Sandy et al, 2016)
Kuala Dua Village Kubu Raya Regency has secondary peat swamp forest and open peat land due to fires 3-4 years earlier so it is overgrown with a variety of new types of flora, one of which is a type of fern
The results show that 5 species of ferns found in peat swamp forest and 4 species of ferns were found on open peatlands
Summary
Indeks kelimpahan jenis dipengaruhi oleh keanekaragaman jenis dan jumlah jenis yang digunakan rumus indeks Evennes (Odum, 1993). Ni : Indeks nilai penting jenis ke-i. Keanekaragaman jenis adalah suatu indeks keanekaragaman secara keseluruhan dalam suatu tipe hutan yang dapat ditentukan dengan rumus ShanonWeiner (Fachrul, 2012). Adapun indeks kekayaan jenis dapat dihitung dengan rumus sebagai berikut: H’= Pi Ln Pi d =. Gambut sekunder dan 4 jenis tumbuhan paku-pakuan pada lahan gambut terbuka. A : Jumlah jenis di hutan rawa gambut sekunder. B : Jumlah jenis di lokasi lahan terbuka gambut. Jenis paku-pakuan yang terdapat pada dua lokasi tersebut digolongkan dalam dua kelompok menurut cara hidupnya atau tempat tumbuhnya yaitu terestrial dan epifit. Jenis-jenis tumbuhan paku-pakuan yang ditemukan dapat dilihat pada Tabel 1. Jenis Paku-pakuan yang Ditemukan dan Habitat Tumbuhnya (Species fern and growing habitats)
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