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Thursday, 28 July 2016

Distribution and abundance of marine wood borers on the west coast of Peninsular Malaysia

Published Date

Volume 98 of the series Developments in Hydrobiology pp 111-121

Title 

Distribution and abundance of marine wood borers on the west coast of Peninsular Malaysia

  • Author 
  • Harinder Rai Singh
  • A. Sasekumar

  • Abstract 
  • Twenty one species of marine wood borers were recorded in this study. There are seventeen species of bivalves of which sixteen are from the family Teredinidae and one from the family Pholadidae. The crustaceans comprised the family Sphaeromatidae with three species and the family Limnoriidae with one species. Seven of the fourteen known genera of the teredinids were recorded. The bivalve wood borers were widely distributed in the local mangroves. Martesia striata was the most abundant wood borer at the Degaussing Range jetty, Lumut. Lyrodus pedicellatus was the most abundant shipworm in wooden panels. Shipworms were abundant on the subtidal panels where the genus Bankia, was most common while M. striata was abundant on the intertidal panels. M. striata numbers were higher on the top surfaces as compared to the under surfaces of wooden panels.

    Key words

    Subtidal mid-intertidal (intertidal) teredinids Martesia striata Sphaeroma mangroves

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    For further details log on website :
    http://link.springer.com/chapter/10.1007/978-94-011-0958-1_12

    Physical and elasto-mechanical wood properties of young Sentang (Azadirachta excelsa) planted in Sabah, Malaysia

    Published Date
    Volume 57, Issue 3, pp 210–214

    Title 

    Physical and elasto-mechanical wood properties of young Sentang (Azadirachta excelsa) planted in Sabah, Malaysia

    • Author 
    • M. Trockenbrodt
    • K. Misalam
    • J. Lajanga

    Azadirachta excelsa
    ) is being increasingly promoted and planted in Malaysia as plantation species for timber. A study of wood properties of 10-year-old planted Sentang produced the following average values: initial moisture content 49.2%; green density 0.74 g/cm3; ovendry density 0.48 g/cm3; green to standard climate (airdry) shrinkage 3.1% (tang.), 1.7% (rad.), 0.2% (long.); green to ovendry shrinkage 5.5% (tang.), 3.7% (rad.), 0.4% (long.); modulus of rupture 75.7 N/mm2; modulus of elasticity 7060 N/mm2; compression strength (parallel to grain) 39.5 N/mm2; shear strength 14.0 N/mm2 (tang.), 11.7 N/mm2 (rad.); Janka hardness 3.74 kN (tang.), 3.24 kN (rad.).
    These values are consistent with recent reports on approximately 41-year-old planted Sentang from Malaysia, but considerably different from values obtained in studies on naturally occurring adult Sentang from Sabah, on young plantation Sentang from Thailand and on Sentang of unknown age from Indonesia. These variations necessitate additional studies on wood properties of planted and naturally grown Sentang of different origin.

    Azadirachta excelsa

    ) ergab folgende durchschnittlichen Holzeigenschaftswerte: Ausgangsfeuchte 49.2% Dichte bei Ausgangsfeuchte 0.74 g/cm3; Dichte darrtrocken 0.48  g/cm3; Schwindmaße (Ausgangsfeuchte → Standard Klima/lufttrocken) 3.1% (tang.), 1.7% (rad.), 0.2% (long.); Schwindmaße (Ausgangsfeuchte → darrtrocken) 5.5% (tang.), 3.7% (rad.), 0.4% (long.); Bruchfestigkeit 75.7  N/mm2; Elastizitätsmodul 7060 N/mm2; Druckfestigkeit in Faserrichtung 39.5 N/mm2; Scherfestigkeit 14.0  N/mm2 (tang.), 11.7 N/mm2 (rad.); Härte nach Janka 3.74 kN (tang.), 3.24 kN (rad.).
    Diese Werte stimmen mit denen aus Untersuchungen von ca. 41 Jahre altem Plantagenholz von der Malaysischen Halbinsel überein. Sie unterscheiden sich jedoch stark von denen aus Untersuchungen von reifem Sentang aus Naturwald in Sabah, jungem Plantagen-Sentang aus Thailand und Sentang aus Indonesien. Die Unterschiede zwischen den Studien machen weitere Untersuchungen zu den Holzeigenschaften von Sentang verschiedener Herkünfte aus Plantagen und Naturwald notwendig.

    For further details log on website :
    http://link.springer.com/article/10.1007/s001070050043

    Importance of rubberwood in wood export of Malaysia and Thailand

    Published Date

    Volume 41, Issue 2, pp 179-189
    First online: 

    Title 

    Importance of rubberwood in wood export of Malaysia and Thailand

    • Author 
    • Akira Shigematsu 
    • Nobuya Mizoue
    • Tsuyoshi Kajisa
    • Shigejiro Yoshida

    Abstract

    We examined the contribution of rubberwood to the timber export markets of Malaysia and Thailand. In Malaysia, rubberwood has grown from 26% of total exported wood products in 1998 to 35% in 2007. A high proportion of furniture products (80%) is rubberwood, whereas the contribution of rubberwood to other wooden products is less than 20%. Only 10% of sawn timber and logs is rubberwood. In Thailand, rubberwood contributes to around 60% of total exported wood products, arising from a high share of not only furniture products (70%) but also other wood products (around 50%) and sawn timber and logs, which have increased in share from 40% in 1998 to 79% in 2007. We conclude that the high proportion of rubberwood products in the wood export markets of these two countries is a result of: (1) scarcity of raw wood materials because of strict controls on the logging of natural forests; and (2) governmental support to rubberwood production, including financial support to rubber planters and technical assistance to downstream timber processors.

    Keywords

    Forest plantation Rubberwood Governmental support Rubber plantation management

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    For further details log on website :
    http://link.springer.com/article/10.1007/s11056-010-9219-7

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