Background Indonesian economy is sustained largely by domestic factors such as large
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WORKING GROUP 1: FUNDAMENTAL ASSESSMENT FOR BIO-RESOURCES
1. Distribution pattern of Alstonia scholaris - a species contained rich medicinal substances - in different forest ecosystems Bambang Irawan,
Iskandar Z. Siregar, Reiner Finkeldey 2. Radical scavenging activity of leafy amaranths as potential antioxidant
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Distribution pattern of Alstonia scholaris - a species
containing rich medicinal substances - in different forest ecosystems
Bambang Irawan
1,
, Iskandar Z. Siregar
2
, Reiner Finkeldey
3
1
Forestry Faculty, University of Jambi, Indonesia
2
Forestry Faculty, Bogor Agricultural University, 16680, Indonesia
3
Institute of Forest Genetics, University of Goettingen, Germany Corresponding author: birawan1gwdg.de
Abstract Alstonia scholaris
L. R.Br Apocynaceae is an evergreen tropical. It is native to tropical and subtropical Africa, Central America,
Southeast Asia, Polynesia and Australia. A. scholaris is a species with high economical and ecological values. It is fast growing species. The latex
provides a good quality chewing gum; the bark is a source of fibers. A. scholaris
also contains many chemical substances that are important both for traditional and modern medicines. It is reported to contain various
alkaloids, coumarins, flavonoids, leucoanthocyanins, simple phenolics, steroids, saponins and tannins. Ecologically, A. scholaris also plays an
important role in the forest succession processes. An investigation on the distribution pattern of A. scholaris was conducted in three ecosystems in
Jambi, namely jungle rubber JR, close to primary forest CPF, and secondary forest SF. Six hectare plots have been developed in two lowland
forest landscapes namely Senami Forest and Bukit Duabelas National Park BDNP. All trees above 10 cm were recorded following standard inventory
method. The results showed that A. scholaris could be found in all ecosystems except CPF in BDNP with the highest dominancy in the CPF of
Senami Forest 0.02840 followed by JR of BDNP and SF in Senami. The density value of A. scholaris varied among the ecosystems. The highest
value was 0.0940 which could be found in SF followed by CPF in Senami and JR in BDNP. The total volume with the highest of 12.32 m3ha and
frequency of 22 trees per hectare could be found SF in Senami. The mean diameter of A. scholaris varied from 17.86 cm to 31.18 cm that could be
found in JR and SF in Senami respectively, while the tallest A. scholaris could be found in SF of Senami 10.50 m followed by JR in BDNP with
the height of 10.40 m. Keywords
A. scholaris, distribution pattern, different ecosystems, medicinal substances