Tree Communities of a Fragmented Forest in an Oil Palm Plantation

Forest fragments in oil palm plantations are remnants of the original forest tract of various sizes and shapes after clearing forested lands for crops and roads. Studies on edge effects are important because the current land-use practices will significantly affect future trends of fragmented forests...

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Main Author:	Claudia Lennya, Jana
Format:	Thesis
Language:	English
Published:	2023
Subjects:	SD Forestry
Online Access:	http://ir.unimas.my/id/eprint/42016/1/MSc%20Thesis_Claudia%20Lennya%20Anak%20Jana%20%2818020230%29.pdf
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id	my-unimas-ir.42016
record_format	uketd_dc
spelling	my-unimas-ir.420162023-06-22T06:18:41Z Tree Communities of a Fragmented Forest in an Oil Palm Plantation 2023-06-22 Claudia Lennya, Jana SD Forestry Forest fragments in oil palm plantations are remnants of the original forest tract of various sizes and shapes after clearing forested lands for crops and roads. Studies on edge effects are important because the current land-use practices will significantly affect future trends of fragmented forests. This study aimed to determine the forest stand structure, tree species composition, and compare the structure and floristics between the forest edge and forest interior of a fragmented forest in an oil palm plantation. Eight transects from the forest edge to the interior were created, and six plots of 20 x 20 m at 20 m intervals were established on each transect. The first three plots from the edge are the sampling plots for the forest edge, and the following three are the samplings plots for the forest interior. Thus, a total of 24 sampling plots each for forest edge and interior were examined for stand structure and species composition. Tree enumeration and species identification were conducted in all sampling plots to all trees with a diameter at breast height (DBH) of 5 cm and above. A total of 59 families consisting of 274 species and 988 stems were recorded in the forest edge; meanwhile, 52 families consisting of 318 species and 1184 stems were recorded in the forest interior for all trees with DBH ≥ 5 cm. The aboveground biomass (AGB) with DBH ≥ 5 cm and DBH ≥ 10 cm in the forest edge were 260 Mg/ha and 249 Mg/ha, respectively. Meanwhile, the AGB in the forest interior with DBH ≥ 5 cm and DBH ≥ 10 cm were 279 Mg/ha and 269 Mg/ha, respectively. Result showed the AGB were lower at the forest edge than at the interior. Species Elateriospermum tapos, genus Shorea, and family Dipterocarpaceae dominated the forest edge and interior. The tree distribution by diameter class showed the inverted-J or reverse-J curve pattern, indicating good regeneration in both forest types. Species diversity and richness were considered high since the Shannon-Wiener index showed 2.25 (forest edge) and 2.28 (forest interior), the Simpson index represented 0.99 at both forest zones, while the Margalef index showed 39.8 and 45.1 at the forest edge and forest interior, respectively. The dispersion of tree species of the Morisita index was unevenly distributed for both forest edge (1.03) and interior (1.04). Floristically, the similarity index between the two forest types is low at 41%. The finding indicated that the forest structure and species composition in the forest fragments regenerate well and represent good forest health. UNIMAS 2023-06 Thesis http://ir.unimas.my/id/eprint/42016/ http://ir.unimas.my/id/eprint/42016/1/MSc%20Thesis_Claudia%20Lennya%20Anak%20Jana%20%2818020230%29.pdf text en public masters Universiti Malaysia Sarawak (UNIMAS) Faculty of Resource Science and Technology
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English
topic	SD Forestry
spellingShingle	SD Forestry Claudia Lennya, Jana Tree Communities of a Fragmented Forest in an Oil Palm Plantation
description	Forest fragments in oil palm plantations are remnants of the original forest tract of various sizes and shapes after clearing forested lands for crops and roads. Studies on edge effects are important because the current land-use practices will significantly affect future trends of fragmented forests. This study aimed to determine the forest stand structure, tree species composition, and compare the structure and floristics between the forest edge and forest interior of a fragmented forest in an oil palm plantation. Eight transects from the forest edge to the interior were created, and six plots of 20 x 20 m at 20 m intervals were established on each transect. The first three plots from the edge are the sampling plots for the forest edge, and the following three are the samplings plots for the forest interior. Thus, a total of 24 sampling plots each for forest edge and interior were examined for stand structure and species composition. Tree enumeration and species identification were conducted in all sampling plots to all trees with a diameter at breast height (DBH) of 5 cm and above. A total of 59 families consisting of 274 species and 988 stems were recorded in the forest edge; meanwhile, 52 families consisting of 318 species and 1184 stems were recorded in the forest interior for all trees with DBH ≥ 5 cm. The aboveground biomass (AGB) with DBH ≥ 5 cm and DBH ≥ 10 cm in the forest edge were 260 Mg/ha and 249 Mg/ha, respectively. Meanwhile, the AGB in the forest interior with DBH ≥ 5 cm and DBH ≥ 10 cm were 279 Mg/ha and 269 Mg/ha, respectively. Result showed the AGB were lower at the forest edge than at the interior. Species Elateriospermum tapos, genus Shorea, and family Dipterocarpaceae dominated the forest edge and interior. The tree distribution by diameter class showed the inverted-J or reverse-J curve pattern, indicating good regeneration in both forest types. Species diversity and richness were considered high since the Shannon-Wiener index showed 2.25 (forest edge) and 2.28 (forest interior), the Simpson index represented 0.99 at both forest zones, while the Margalef index showed 39.8 and 45.1 at the forest edge and forest interior, respectively. The dispersion of tree species of the Morisita index was unevenly distributed for both forest edge (1.03) and interior (1.04). Floristically, the similarity index between the two forest types is low at 41%. The finding indicated that the forest structure and species composition in the forest fragments regenerate well and represent good forest health.
format	Thesis
qualification_level	Master's degree
author	Claudia Lennya, Jana
author_facet	Claudia Lennya, Jana
author_sort	Claudia Lennya, Jana
title	Tree Communities of a Fragmented Forest in an Oil Palm Plantation
title_short	Tree Communities of a Fragmented Forest in an Oil Palm Plantation
title_full	Tree Communities of a Fragmented Forest in an Oil Palm Plantation
title_fullStr	Tree Communities of a Fragmented Forest in an Oil Palm Plantation
title_full_unstemmed	Tree Communities of a Fragmented Forest in an Oil Palm Plantation
title_sort	tree communities of a fragmented forest in an oil palm plantation
granting_institution	Universiti Malaysia Sarawak (UNIMAS)
granting_department	Faculty of Resource Science and Technology
publishDate	2023
url	http://ir.unimas.my/id/eprint/42016/1/MSc%20Thesis_Claudia%20Lennya%20Anak%20Jana%20%2818020230%29.pdf
_version_	1783728532709441536

Tree Communities of a Fragmented Forest in an Oil Palm Plantation

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