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Sains Malaysiana 42(9)(2013):
1201–1205
Sedimentation Impacts on the Growth Rates of the Scleractinian Coral Acropora formosafrom Fringing Reefs of Tioman Island, Malaysia
(Kesan Pemendapan Terhadap Kadar Tumbesaran Karang Skleraktinia Acropora formosa
dari Terumbu Pinggir Pulau Tioman,
Malaysia)
R. Nakajima1*,
1Marine Biodiversity Research
Program, Institute of Biogiosciences,
Japan Agency for Marine-Earth Science and Technology (JAMSTEC),
Yokosuka, 237-0061 Kanagawa, Japan
2Marine Ecosystem Research
Centre, Faculty of Science and Technology Universiti Kebangsaan Malaysia, 43600 Bangi,
Selangor D.E. Malaysia
3Department
of Environmental Engineering for Symbiosis, Faculty of Engineering
Soka University, Hachioji, 192-8577 Tokyo, Japan
45000 Kuala Selangor, Malaysia
Received: 14 January 2013 / Accepted: 16 April
2013
ABSTRACT
The rates of sedimentation and growth of the branching coral Acropora formosa at Marine Park, Tulai and Renggis reefs in Tioman Island, Malaysia were surveyed between November 2000 and October 2001. The
sedimentation rates were measured using sediment traps and the coral growth
rates were measured using digital photography and computer image analysis. The
rates of sedimentation at Marine Park (17.3 ± 18.7 mg dry weight cm-2 d-1)
were 5.0 times higher than the Tulai site and 11.4
times higher than the Renggis site. In contrast, both
the linear extension (3.9 ± 0.9 mm month-1) and areal growth rates (3.9
± 1.7 cm2 month-1)
of A. formosa at
Marine Park were significantly less than at Tulai and Renggis. The higher sedimentation and consequent
lowered light levels at Marine Park may have resulted in the lower growth of
the Acropora corals.
Keywords: Branching coral; linear extension growth; sedimentation; Tioman Island
ABSTRAK
Kadar pemendapan dan tumbesaran karang rerantingAcropora formosa di sekitar terumbu karang kawasan Taman Laut, Pulau Tulai dan Pulau Renggis di persekitaran Pulau Tioman, Malaysia, telah diselidik antara bulan November 2000 dan Oktober 2001. Kadar pemendapan diukur dengan menggunakan perangkap mendapan dan tumbesaran karang dinilai dengan menggunakan imej digital dan perisian komputer. Kadar pemendapan di tapak Taman Laut (17.3 ± 18.7 mg berat kering cm-2 h-1) adalah 5.0 kali ganda lebih tinggi berbanding tapak di Pulau Tulai dan 11.4 kali ganda lebih tinggi dari tapak di Pulau Renggis. Sebaliknya, pertumbuhan linear
(3.9 ± 0.9 mm bulan-1) dan kadar pertumbuhan permukaan (3.9 ± 1.7 cm2 bulan-1) A. farmosa adalah lebih rendah secara bererti di Taman Laut berbanding Pulau Tulai dan Renggis.
Kadar pemendapan dan seterusnya pengurangan penembusan cahaya di Taman Laut mungkin menyebabkan kemunduran kadar pertumbuhan karangAcropora di tapak kajian.
Kata kunci: Kadar pertumbuhan linear; karang reranting; pemendapan; Pulau Tioman
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*Corresponding author, e-mail: nakajimar@jamstec.go.jp
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