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2017, Proceedings of Colloquium on the Dered Krian National Park – Scientific Expedition 2016. Kuching, Sarawak.
Limestone karsts are widespread throughout the Southeast Asia and potential reservoir of biodiversity. However, this special habitat has never been clearly examined for biodiversity reservoir in the literatures. In Sarawak, majority of the karsts geological are located in the northwestern part; Bau limestone and Padawan-Serian-Tebedu limestone. The Bau limestone taxonomically has been explored since 1845 with many plant collectors such as G.D. Haviland, J.A.R. Anderson, H.N. Ridley etc. have visited here. The Padawan-Serian-Tebedu limestone areas, however, are still poorly known. Information on the gingers from the limestone habitat are still far from sufficient as no studies have been conducted in this area. Therefore, the aim of this study is to compare the diversity of ginger from the two limestone hills in the northwestern of Sarawak. Two selected limestone hills were; Gunung Payang in the Padawan-Serian Tebedu limestone areas and Gunung Doya in the Dered Krian National Park, Bau. A total of twentytwo ginger taxa representing by eleven genera were recorded from the two selected limestone hills. Seventeen taxa of ginger were recorded from Gunung Doya and 15 from Gunung Payang. Ten ginger taxa were recorded in both localities, namely Alpinia ligulata (K. Schum.) K. Schum., Etlingera brachychila (Ridl.) R.M. Sm., E. elatior (Jack) Sm., Globba atrosanguinea Teijsm. & Binn., G. brachyanthera K. Schum., Hornstedtia havilandii (K. Schum.) K. Schum., H. reticulata (k. Schum.) K. Schum., H. tomentosa (Blume) Bakh.f., Plagiostachys albiflora Ridl. and Zingiber acuminatum Val. var. borneense R.M. Sm.
Journal of Tropical Biology and Conservation
Species Composition and Distribution of Zingiberaceae in Mt. Hamiguitan Expansion Site, Davao Oriental, Philippines2019 •
This study was conducted to assess the composition and distribution of gingers (Zingiberaceae) in Mt. Hamiguitan expansion site, Tumalite, San Isidro, Davao Oriental, Philippines. Transect walk and opportunistic sampling were carried out along established forest trails, rivers, creeks and streams. Fourteen (14) ginger species were found, of which 10 species are endemic to the Philippines, two species are introduced, and two species are unidentified to the species level. The species belong to two subfamilies (Alpinioideae and Zingiberoideae) and three tribes (Alpinieae, Globbeae, and Zingibereae). The species recorded include Alpinia haenkei C.Presl, Alpinia cf. vulcanica Elmer, Alpinia rufa C.Presl, Alpinia sp., Curcuma zedoaria (Christm.) Rosc., Curcuma longa L., Etlingera dalican (Elmer) A.D.Poulsen, Etlingera hamiguitanensis Naive, Etlingera sp., Geocharis fusiformis (Ridl.) R.M.Sm., Globba campsophylla K.Schum., Hornstedtia conoidea Ridl., Hornstedtia microcheila Ridl., and Meistera muricarpa (Elmer) Škorničk. & M.F.Newman. These species represent 47% of the total genera and 14% of the total species of Zingiberaceae in the Philippines. Cluster analysis (numerical analysis) using morphological descriptions supported present taxonomic placements of the species. The data indicated that G. fusiformis is the most abundant ginger in the area.
2015 •
The flora of Tropical Asia is among the richest in the world, yet the actual diversity is estimated to be much higher than previously reported. Myanmar and Thailand are adjacent countries that together occupy more than the half the area of continental Tropical Asia. This geographic area is diverse ecologically, ranging from cool-temperate to tropical climates, and includes from coast, rainforests and high mountain elevations. An updated checklist of aquatic plants, which includes 78 species in 44 genera from 24 families, are presented based on floristic works. This number includes seven species, that have never been listed in the previous floras and checklists. The species (excluding non-indigenous taxa) were categorized by five geographic groups with the exception of to reflect the rich diversity of the countries ' floras.
Proceedings of Colloquium on the Dered Krian National Park – Scientific Expedition 2016. Kuching, Sarawak. 115 – 120.
COMPARISON ON OCCURRENCE OF MARANTACEAE FROM TWO LIMESTONE HILLS IN THE NORTHWESTERN OF SARAWAK2017 •
The Prayer Plant family or also known as Arrowroot family (Marantaceae) is a native to tropical and subtropical regions. With about 31 genera and over 550 species, is the second biggest family in the Order Zingiberales. The center of the species richness for this family is in South America. Only about 55 species reported from Asia and about 20 of them from Borneo. Although they are very common in the forest, the Marantaceae in Borneo and Sarawak particularly are poorly studied. The members of Marantaceae are found from various habitats from the lowland forests to upper hill forests, includes swampy areas and limestone, elevations up to 1700m. A comparison study on the occurrence of Marantaceae at the limestone habitat in Borneo and particularly Sarawak has never been studied. Therefore, the objective of this study is to compare the occurrence of Marantaceae in two limestone hills; Gunung Doya in the Dered Krian National Park (Bau limestone areas) and Gunung Payang in the Serian-Padawan-Tebedu Limestone areas. The studies were conducted at the foot of limestone hills of Gunung Doya and Gunung Payang that includes microhabitats such as limestone pocket, boulder, crevices and cave mouth. The surveys were conducted in August - September 2016. A total of eight species were recorded from two localities [Donax canniformis, Phrynium hirtum, P. pubinerve, P. villosulum, Phrynium sp., Stachyphrynium calcicola, Stachyphrynium sp.1 (cf. aurantiacum), Stachyphrynium sp.2], three species each from Gunung Payang and Gunung Doya. Only two species; D. canniformis and P. pubinerve, were recorded occurs in both localities.
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