Species distribution modeling and geological patterns Of tribe schismatoglottideae (araceae) in sundaland
Sundaland is a biogeographical region of Southeast Asia which encompasses the Malay Peninsula and the islands on the Sunda shelf, including Borneo, Java, Sumatra and their surrounding islands. Tribe Schismatoglottideae (Araceae) is a terrestrial, rheophytic or lithophytic herbs widespread in humi...
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| Format: | Thesis |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/9019/2/Soon%28fulltext%29.pdf |
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| Summary: | Sundaland is a biogeographical region of Southeast Asia which encompasses the Malay
Peninsula and the islands on the Sunda shelf, including Borneo, Java, Sumatra and their
surrounding islands. Tribe Schismatoglottideae (Araceae) is a terrestrial, rheophytic or
lithophytic herbs widespread in humid tropical Asia and with some genera are
overwhelmingly endemic to Borneo where out of more than 250 species, 95% are endemic
within Borneo. However, many areas in Sundaland still remain very poorly known
especially Kalimantan cover the largest land area within Borneo. Therefore, this study
provided preliminary information of potential habitat suitability based on existing species
distribution in the region using the MaxEnt species distribution modeling method. The
species dataset used in this study comprises 601 records of species distribution in eight
genera of tribe Schismatoglottideae. Further databases used in this study were obtained
from ISRIC World Soil Information database and WorldClim database as environmental
variables. The genus distribution models for eight genera were generated; bioclimate and
soil parameters affecting the distribution were discussed. The second part of the study
provides the investigation on the genus distribution in Sabah and Sarawak (Malaysian
Borneo) against the framework of historical geological formations. A total of 947 species
iv
records were plotted onto the digital map. The maps were produced by combining the
topographic map (base map) together with geological map for Sabah and Sarawak
provided by Orr & Associates organization. The combined digital map was re-projected to
Universal Transverse Mercator (UTM) coordinate system using ArcGIS 9.3. Out of 64
geological formations in Sarawak, tribe Schismatoglottideae occurs in 23 formations where
in Sabah, out of 58 geological formations in Sabah, tribe Schismatoglottideae occurs in 13
formations. |
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