Influence of severe freshwater flooding during the rainy season on the coral community around Khang Khao Island in the inner Gulf of Tahiland
スポンサーリンク
概要
- 論文の詳細を見る
We observed a severe reduction in salinity around Khang Khao Island at the end of the rainy season in September and October, 1995, caused by the most serious freshwater flooding in Thailand in recent 15 years. During low tide, corals around Khang Khao Island were exposed to 23‰ at three meters depth, and 25‰ at five meters. As a result, Pocillopora damicornis and a few species of Acropora showed colony bleaching or partial or complete colony death in the field. On the other hand, Porites spp., the dominant corals of this area, did not show any conspicuous effects. Porites lutea could survive five days of experimental exposure to 17‰, the critical salinity for other corals. The chlorophyll-a concentration of P. lutea that become partially bleached after seven days exposure to 20‰ was higher than in normal control fragments. These phenomena suggest that P. lutea has a compensation mechanism against salinity reduction. Both field observations and experiments suggest that lowered salinity caused by runoff during the rainy season is an important factor besides turbidity in establishing the characteristics of the coral community structure around Khang Khao Island. A detailed study of the process of coral community formation in this area may contribute to an understanding of not only the negative effects of continental great rivers on the establishment of coral reefs around tropical continental shores but also the influence of the heavy rainfall on a coral community in the coral reef region by the global climate change.
著者
-
Nakano Yoshikatsu
Sesoko Station Tropical Biosphere Research Center University Of Ryukyus
-
Rungsupa Sompop
Aquatic Resources Research Institute Chulalongkorn University
-
TSUCHIYA Makoto
Department of Chemistry, Biology and Marine Science, College of Science, University of the Ryukyus
関連論文
- Seasonal variations in cell abundance of Noctiluca scintillans in the coastal waters off Chonburi Province, the upper Gulf of Thailand
- COMPARATIVE STUDY ON THE MORPHOLOGY OF CORAL PLANULAE OF SEVERAL SPECIES(Behavior Biology and Ecology,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
- REPRODUCTION AND LARVAL DEVELOPMENT OF BROODING FEATHER STAR, ANTEDONIDAE GEN. SP. FROM THE OKINAWAN CORAL REEF(Behavior Biology and Ecology,Abstracts of papers presented at the 76^ Annual Meeting of the Zoological Society of Japan)
- SETTLEMENT OF COMATULID LARVAE ON THE CORAL REEFS OF THE RYUKYU ISLANDS(Developmental Biology,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
- ANALYSIS OF A PRECURSOR STRUCTURE AND EXPRESSION OF EGG PROTEINS IN A REEF-BUILDING CORAL(Genetics,Abstracts of papers presented at the 76^ Annual Meeting of the Zoological Society of Japan)
- MOLECULAR ANALYSIS OF EGG PROTEINS IN REEF-BUILDING CORALS(Developmental Biology,Abstracts of papers presented at the 75^ Annual Meeting of the Zoological Society of Japan)
- P-397 Characterization of a Natural Inducer of Coral Larval Metamorphosis
- Dissolved Oxygen Consumption by Bottom Sediments of Shrimp Pond and Mangrove Forest in Thailand
- 熱帯貧栄養沿岸域における植物プランクトン群集のサイズ組成
- Influence of severe freshwater flooding during the rainy season on the coral community around Khang Khao Island in the inner Gulf of Tahiland
- Intratentacular budding in Galaxea fascicularis
- PATHOLOGICAL STUDIES ON CORAL TUMORS OF PORITES spp., OKINAWA JAPAN(Behavior Biology and Ecology,Abstracts of papers presented at the 76^ Annual Meeting of the Zoological Society of Japan)
- A crater formation of the colony of Porites cylindrica induced by Dendropoma maxima