Ecological studies on the nepenthes species along Kaingaran Trail of Mount Trus Madi, Sabah, Malaysia

This study aimed to provide an insight into the current status of the Nepenthes community on Mount Trus Madi and the implications to their conservation. Ten 0.01 ha Nepenthes plots were established along the Kaingaran summit trail. A total of five Nepenthes taxa were identified, namely the Nepenthes...

Full description

Saved in:

Bibliographic Details
Main Author:	Alviana Damit
Format:	Thesis
Language:	English English
Published:	2019
Subjects:	QK494-494.5 Gymnosperms
Online Access:	https://eprints.ums.edu.my/id/eprint/40519/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/40519/2/FULLTEXT.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-ums-ep.40519
record_format	uketd_dc
spelling	my-ums-ep.405192024-09-24T04:20:46Z Ecological studies on the nepenthes species along Kaingaran Trail of Mount Trus Madi, Sabah, Malaysia 2019 Alviana Damit QK494-494.5 Gymnosperms This study aimed to provide an insight into the current status of the Nepenthes community on Mount Trus Madi and the implications to their conservation. Ten 0.01 ha Nepenthes plots were established along the Kaingaran summit trail. A total of five Nepenthes taxa were identified, namely the Nepenthes tentaculata, N. zakriana, N. macrophylla, N. lowii and natural hybrid N. x trusmadiensis. The most abundant species was N. tentaculata with number of individuals was more than 75% from the total number of individuals of all species. In contrast, the other four taxa have a smaller distribution and less abundant along the Kaingaran trail. All species have significantly aggregated population dispersion pattern indicating that they grow in grouped and tend to survive best in particular favourable patches. Population structure of N. tentaculata showed higher number of seedlings compared to juveniles and mature individuals, indicating that its population is healthy, stable and growing. Meanwhile, the N. lowii, N macrophylla and N. x trusmadiensis showed lower number of seedlings and juveniles that may suggesting the inability of their seeds to germinate or the seedlings and saplings to survive and grow, that may lead to uncertain regeneration. By using Generalized Estimating Equation (GEE) approach, it was found that there was a significant reduction of the abundance of N. macrophylla between year 2016 and 2017, suggesting it was potentially at risk of population declined. Trail impact assessment was conducted using the Generalized Linear Models (GLM) to assess the effects of the trail on the abundance and mortality of the Nepenthes plants at different distances from the trail. The abundances of Nepenthes were significantly higher along the trail than further away while their mortalities were significantly highest at the zones that furthest from the trail. Their seedling individuals that were located at furthest from the trail, were also more likely to die compared to their seedlings adjacent to the trail. Evidently, the Nepenthes plants in this study were preferred to grow and survived the best along the trail, where the forest gap was wider, light intensity was higher and less competition with other plants, compared to the area furthest from the trail. Correlation analysis Spearman rank correlation coefficients was used to identify the relationship between the density of Nepenthes and the changes in stand structures and other factors along the elevation profile. The density of N. lowii was significantly correlated to the vegetation type and mean tree height where they were only grow well on summit scrub vegetation which have shorter trees. Meanwhile, the density of N. macrophylla was significantly correlated with the total tree basal area and altitude where they were restricted to elevation above 2,500 m and was more abundant on vegetation with lower tree basal areas. These indicate that both N. lowii and N. macrophylla species displayed a very narrow habitat specificity compare to the other Nepenthes species. The data and findings from this study are valuable as baseline data for future study comparison and thereafter will enable further effective conservation management and monitoring plans on Nepenthes community in Mount Trus Madi. 2019 Thesis https://eprints.ums.edu.my/id/eprint/40519/ https://eprints.ums.edu.my/id/eprint/40519/1/24%20PAGES.pdf text en public https://eprints.ums.edu.my/id/eprint/40519/2/FULLTEXT.pdf text en validuser masters Universiti Malaysia Sabah Institute for Tropical Biology and Conservation
institution	Universiti Malaysia Sabah
collection	UMS Institutional Repository
language	English English
topic	QK494-494.5 Gymnosperms
spellingShingle	QK494-494.5 Gymnosperms Alviana Damit Ecological studies on the nepenthes species along Kaingaran Trail of Mount Trus Madi, Sabah, Malaysia
description	This study aimed to provide an insight into the current status of the Nepenthes community on Mount Trus Madi and the implications to their conservation. Ten 0.01 ha Nepenthes plots were established along the Kaingaran summit trail. A total of five Nepenthes taxa were identified, namely the Nepenthes tentaculata, N. zakriana, N. macrophylla, N. lowii and natural hybrid N. x trusmadiensis. The most abundant species was N. tentaculata with number of individuals was more than 75% from the total number of individuals of all species. In contrast, the other four taxa have a smaller distribution and less abundant along the Kaingaran trail. All species have significantly aggregated population dispersion pattern indicating that they grow in grouped and tend to survive best in particular favourable patches. Population structure of N. tentaculata showed higher number of seedlings compared to juveniles and mature individuals, indicating that its population is healthy, stable and growing. Meanwhile, the N. lowii, N macrophylla and N. x trusmadiensis showed lower number of seedlings and juveniles that may suggesting the inability of their seeds to germinate or the seedlings and saplings to survive and grow, that may lead to uncertain regeneration. By using Generalized Estimating Equation (GEE) approach, it was found that there was a significant reduction of the abundance of N. macrophylla between year 2016 and 2017, suggesting it was potentially at risk of population declined. Trail impact assessment was conducted using the Generalized Linear Models (GLM) to assess the effects of the trail on the abundance and mortality of the Nepenthes plants at different distances from the trail. The abundances of Nepenthes were significantly higher along the trail than further away while their mortalities were significantly highest at the zones that furthest from the trail. Their seedling individuals that were located at furthest from the trail, were also more likely to die compared to their seedlings adjacent to the trail. Evidently, the Nepenthes plants in this study were preferred to grow and survived the best along the trail, where the forest gap was wider, light intensity was higher and less competition with other plants, compared to the area furthest from the trail. Correlation analysis Spearman rank correlation coefficients was used to identify the relationship between the density of Nepenthes and the changes in stand structures and other factors along the elevation profile. The density of N. lowii was significantly correlated to the vegetation type and mean tree height where they were only grow well on summit scrub vegetation which have shorter trees. Meanwhile, the density of N. macrophylla was significantly correlated with the total tree basal area and altitude where they were restricted to elevation above 2,500 m and was more abundant on vegetation with lower tree basal areas. These indicate that both N. lowii and N. macrophylla species displayed a very narrow habitat specificity compare to the other Nepenthes species. The data and findings from this study are valuable as baseline data for future study comparison and thereafter will enable further effective conservation management and monitoring plans on Nepenthes community in Mount Trus Madi.
format	Thesis
qualification_level	Master's degree
author	Alviana Damit
author_facet	Alviana Damit
author_sort	Alviana Damit
title	Ecological studies on the nepenthes species along Kaingaran Trail of Mount Trus Madi, Sabah, Malaysia
title_short	Ecological studies on the nepenthes species along Kaingaran Trail of Mount Trus Madi, Sabah, Malaysia
title_full	Ecological studies on the nepenthes species along Kaingaran Trail of Mount Trus Madi, Sabah, Malaysia
title_fullStr	Ecological studies on the nepenthes species along Kaingaran Trail of Mount Trus Madi, Sabah, Malaysia
title_full_unstemmed	Ecological studies on the nepenthes species along Kaingaran Trail of Mount Trus Madi, Sabah, Malaysia
title_sort	ecological studies on the nepenthes species along kaingaran trail of mount trus madi, sabah, malaysia
granting_institution	Universiti Malaysia Sabah
granting_department	Institute for Tropical Biology and Conservation
publishDate	2019
url	https://eprints.ums.edu.my/id/eprint/40519/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/40519/2/FULLTEXT.pdf
_version_	1811770522636124160

Ecological studies on the nepenthes species along Kaingaran Trail of Mount Trus Madi, Sabah, Malaysia

Similar Items