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Bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the Kelantan River Basin

The soil perturbation in Kelantan, Malaysia, is mainly caused by the logging activity and land conversion over the years. The perturbation has led to a change in soil dynamics and stability, which is one of the factors that contribute to flooding. This study utilized bacterial diversity as an indica...

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Main Author: Rennielyn Rupert
Format: Thesis
Language:English
English
Published: 2020
Subjects:
QR75-99.5 Bacteria
Online Access:https://eprints.ums.edu.my/id/eprint/42624/1/24%20PAGES.pdf
https://eprints.ums.edu.my/id/eprint/42624/2/FULLTEXT.pdf
https://eprints.ums.edu.my/id/eprint/42624/
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spelling my.ums.eprints.426242025-01-17T06:19:27Z https://eprints.ums.edu.my/id/eprint/42624/ Bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the Kelantan River Basin Rennielyn Rupert QR75-99.5 Bacteria The soil perturbation in Kelantan, Malaysia, is mainly caused by the logging activity and land conversion over the years. The perturbation has led to a change in soil dynamics and stability, which is one of the factors that contribute to flooding. This study utilized bacterial diversity as an indicator to investigate the soil changes related to soil dispersion in the Kelantan river basin (KRB). The bacterial diversity pattern at the four selected study points (upstream to downstream, river basin) particularly in primary forest, logged forest, oil palm plantation and rubber plantation was characterized via two molecular approaches, the 16S rDNA culturedependent and culture-independent 16S rRNA-based metagenomic analysis. The results showed the phyla of Actinobacteria, Acidobacteria, Proteobacteria, Chloroflexi, Crenarchaeota and Verrucomicrobia dominated in the four sampling sites. Through the studies, the data revealed three locations shared similar soil bacterial composition profiles such as the phyla of Actinobacteria, Acidobacteria and Proteobacteria. The findings suggested there were an interchange of soil between diverse areas and implied that floodwaters played a significant role in perturbation of soil in the river basin. Another crucial finding was the discovery of marine bacteria in the logged forest which was previously notified as flooding areas suggesting there was an interchanged of bacteria between the marine and terrestrial land. Besides, the present study found several biofilm-producing bacteria isolated from the KRB area, which were reported in previous studies to involve in soil aggregation and stability. The characterization of biofilm-producing bacteria has provided a profound understanding of the biofilm formation process and phenotypic differences between the planktonic and biofilm forms. This study deduced that bacterial diversity could be utilized as an indicator in providing forensic, environmental evidence regarding soil dispersion and essential for land management and strategy development in the river basin, Kelantan. Also, this indicator can be extended to other regions of the world with similar patterns of anthropogenic impact. 2020 Thesis NonPeerReviewed text en https://eprints.ums.edu.my/id/eprint/42624/1/24%20PAGES.pdf text en https://eprints.ums.edu.my/id/eprint/42624/2/FULLTEXT.pdf Rennielyn Rupert (2020) Bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the Kelantan River Basin. Masters thesis, Universiti Malaysia Sabah.
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
English
topic QR75-99.5 Bacteria
spellingShingle QR75-99.5 Bacteria
Rennielyn Rupert
Bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the Kelantan River Basin
description The soil perturbation in Kelantan, Malaysia, is mainly caused by the logging activity and land conversion over the years. The perturbation has led to a change in soil dynamics and stability, which is one of the factors that contribute to flooding. This study utilized bacterial diversity as an indicator to investigate the soil changes related to soil dispersion in the Kelantan river basin (KRB). The bacterial diversity pattern at the four selected study points (upstream to downstream, river basin) particularly in primary forest, logged forest, oil palm plantation and rubber plantation was characterized via two molecular approaches, the 16S rDNA culturedependent and culture-independent 16S rRNA-based metagenomic analysis. The results showed the phyla of Actinobacteria, Acidobacteria, Proteobacteria, Chloroflexi, Crenarchaeota and Verrucomicrobia dominated in the four sampling sites. Through the studies, the data revealed three locations shared similar soil bacterial composition profiles such as the phyla of Actinobacteria, Acidobacteria and Proteobacteria. The findings suggested there were an interchange of soil between diverse areas and implied that floodwaters played a significant role in perturbation of soil in the river basin. Another crucial finding was the discovery of marine bacteria in the logged forest which was previously notified as flooding areas suggesting there was an interchanged of bacteria between the marine and terrestrial land. Besides, the present study found several biofilm-producing bacteria isolated from the KRB area, which were reported in previous studies to involve in soil aggregation and stability. The characterization of biofilm-producing bacteria has provided a profound understanding of the biofilm formation process and phenotypic differences between the planktonic and biofilm forms. This study deduced that bacterial diversity could be utilized as an indicator in providing forensic, environmental evidence regarding soil dispersion and essential for land management and strategy development in the river basin, Kelantan. Also, this indicator can be extended to other regions of the world with similar patterns of anthropogenic impact.
format Thesis
author Rennielyn Rupert
author_facet Rennielyn Rupert
author_sort Rennielyn Rupert
title Bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the Kelantan River Basin
title_short Bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the Kelantan River Basin
title_full Bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the Kelantan River Basin
title_fullStr Bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the Kelantan River Basin
title_full_unstemmed Bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the Kelantan River Basin
title_sort bacterial diversity as an indicator of soil perturbation and soil aggregate stability in the kelantan river basin
publishDate 2020
url https://eprints.ums.edu.my/id/eprint/42624/1/24%20PAGES.pdf
https://eprints.ums.edu.my/id/eprint/42624/2/FULLTEXT.pdf
https://eprints.ums.edu.my/id/eprint/42624/
_version_ 1823092330073161728
score 13.235796

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