Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/135830
Title: CONSERVATION GENOMICS, BIODIVERSITY AND EXTINCTION OF UNDERSTOREY HERBS IN FRAGMENTED TROPICAL FORESTS OF SINGAPORE
Authors: MATTI ASSER NIISSALO
Keywords: Hanguana, gingers, Zingiberales, SNPs, Marantaceae, ddRAD
Issue Date: 28-Dec-2016
Source: MATTI ASSER NIISSALO (2016-12-28). CONSERVATION GENOMICS, BIODIVERSITY AND EXTINCTION OF UNDERSTOREY HERBS IN FRAGMENTED TROPICAL FORESTS OF SINGAPORE. ScholarBank@NUS Repository.
Abstract: Forest fragmentation affects the diversity of forest species, but the magnitude of the effects remains poorly understood. Singapore’s forests are extensively fragmented, with many reported extinctions. Yet the surviving species diversity remains high. I investigated the effects of fragmentation on forest herbs, focusing on four families (Hanguanaceae, Costaceae, Marantaceae and Zingiberales). I surveyed suitable habitat and collected samples from populations. I used ddRADseq for population and evolutionary genetic analyses. More species survive than previously reported, many limited to a few individuals under risk of extinction. I found evidence of surprising reproductive biology in Hanguana. Species that occur only in primary forests have very limited gene flow. For instance the small, highly clonal population of the endemic Zingiber singapurense consists only of unrelated individuals, and the species has only reproduced clonally after a massive drop in population size. Individual longevity may explain the high remaining diversity in Singapore.
URI: http://scholarbank.nus.edu.sg/handle/10635/135830
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