Ultramafic geoecology of South and Southeast Asia

Galey, M. L. , Van der Ent, A. , Iqbal, M. C. M. and Rajakaruna, N. (2017) Ultramafic geoecology of South and Southeast Asia. Botanical Studies, 58 18: 18-18. doi:10.1186/s40529-017-0167-9


Author Galey, M. L.
Van der Ent, A.
Iqbal, M. C. M.
Rajakaruna, N.
Title Ultramafic geoecology of South and Southeast Asia
Journal name Botanical Studies   Check publisher's open access policy
ISSN 1817-406X
1999-3110
Publication date 2017-04-03
Sub-type Article (original research)
DOI 10.1186/s40529-017-0167-9
Open Access Status DOI
Volume 58
Issue 18
Start page 18
End page 18
Total pages 28
Place of publication Taiwan, Republic of China
Publisher Academia Sinica * Institute of Plant and Microbial Biology
Collection year 2018
Language eng
Abstract Globally, ultramafic outcrops are renowned for hosting floras with high levels of endemism, including plants with specialised adaptations such as nickel or manganese hyperaccumulation. Soils derived from ultramafic regoliths are generally nutrient-deficient, have major cation imbalances, and have concomitant high concentrations of potentially phytotoxic trace elements, especially nickel. The South and Southeast Asian region has the largest surface occurrences of ultramafic regoliths in the world, but the geoecology of these outcrops is still poorly studied despite severe conservation threats. Due to the paucity of systematic plant collections in many areas and the lack of georeferenced herbarium records and databased information, it is not possible to determine the distribution of species, levels of endemism, and the species most threatened. However, site-specific studies provide insights to the ultramafic geoecology of several locations in South and Southeast Asia. The geoecology of tropical ultramafic regions differs substantially from those in temperate regions in that the vegetation at lower elevations is generally tall forest with relatively low levels of endemism. On ultramafic mountaintops, where the combined forces of edaphic and climatic factors intersect, obligate ultramafic species and hyperendemics often occur. Forest clearing, agricultural development, mining, and climate change-related stressors have contributed to rapid and unprecedented loss of ultramafic-associated habitats in the region. The geoecology of the large ultramafic outcrops of Indonesia’s Sulawesi, Obi and Halmahera, and many other smaller outcrops in South and Southeast Asia, remains largely unexplored, and should be prioritised for study and conservation.
Keyword Adaptations
Conservation
Edaphic endemism
Edaphic flora
Extreme environments
Geobotany
Plant– soil relations
Serpentine vegetation
Ultramafic plants
Metal hyperaccumulators
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
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Created: Mon, 10 Apr 2017, 18:46:11 EST by Mr Antony Van Der Ent on behalf of Centre For Mined Land Rehabilitation