Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/142747
Title: CONSERVATION OF EPIPHYTIC ORCHIDS IN URBANISED TROPICAL ENVIRONMENT
Authors: MUHAMMAD IZUDDIN BIN MOHAMAD RAFEE
Keywords: Epiphytic orchids, niche requirements, orchid mycorrhizal fungus, ex situ conservation, urban ecology, Singapore
Issue Date: 25-Jan-2018
Citation: MUHAMMAD IZUDDIN BIN MOHAMAD RAFEE (2018-01-25). CONSERVATION OF EPIPHYTIC ORCHIDS IN URBANISED TROPICAL ENVIRONMENT. ScholarBank@NUS Repository.
Abstract: Urban environments generally have reduced biodiversity, yet they may contribute to biodiversity conservation. However, species-specific ecological requirements—particularly in urbanised environments—remain largely unknown, making ex situ conservation/restoration programmes ineffectual. Using native epiphytic orchids as a study system, I conducted next-generation sequencing on bark / orchid samples, seed baiting techniques, seed viability tests, orchid translocation, and statistical models to detect and identify associated orchid mycorrhizal fungus/fungi (OMF), determine potential OMF / orchid (micro)habitats, assess seed longevity, and evaluate OMF- / orchid-environment relationships. Members of two OMF taxa—Ceratobasidiaceae and Serendipitaceae—were found on multiple roadside trees and orchid roots. One orchid species, Grammatophyllum speciosum Blume, has potential for seed bank formation. The biophysical factors that were associated with OMF presence, orchid germination, survival, and growth varied widely. Of note, presence of humus positively influenced OMF presence and long-term orchid survival whereas temperature negatively affected germination. I propose that all species-specific OMF and niche requirements are identified and considered prior to any intervention.
URI: http://scholarbank.nus.edu.sg/handle/10635/142747
Appears in Collections:Ph.D Theses (Open)

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