EFFECTS OF TEMPERATURE ON PHOTOSYNTHESIS AND RESPIRATION IN HERMATYPIC CORALS
EFFECTS OF TEMPERATURE ON PHOTOSYNTHESIS AND RESPIRATION IN HERMATYPIC CORALS
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DOI：
10.1007/bf00402313
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发表时间：
1977-01-01
期刊：
影响因子：
2.4
通讯作者：
JOKIEL, PL
中科院分区：
文献类型：
--
作者：
COLES, SL;JOKIEL, PL
珊瑚P. damicornis（Linn.）在控制温度下对疣状表孔珊瑚Montipora verrucosa（Lamarck）、扁滨珊瑚Porites compressa Dana和真菌Fungia scutaria Lamarck进行了测定。珊瑚的新陈代谢似乎与环境温度条件密切相关。在马歇尔群岛埃尼威托克测量的热带珊瑚显示，与在高温下的维持要求相比，其初级生产量高于夏威夷[美国]同一物种的亚热带品种。光合作用：呼吸作用（P：R）比与18 ℃-18 ℃之间的温度显著负相关。31.degree. C的所有夏威夷珊瑚，而在Enewetak这一比例一般表现出曲线关系，在这个温度范围内。外推的P：R回归温度的值为2.0（估计为长期功能性自养所需的最低限度）与夏威夷标本公布的上限致死温度相吻合。Enewetak样品在> 25 ℃温度下P：R回归的外推C表明这些珊瑚的致死温度为2.5 ℃。5.degree. C高于夏威夷珊瑚，与最近的实验结果非常一致。种间差异P：R温度回归夏威夷珊瑚与上限致死温度耐受性。
Photosynthesis and respiration rates of the reef corals P. damicornis (Linn.), Montipora verrucosa (Lamarck), Porites compressa Dana and Fungia scutaria Lamarck were measured under controlled temperatures. Coral metabolism seems closely adapted to ambient temperature conditions. Tropical corals measured at Enewetak, Marshall Islands, showed greater primary production compared to maintenance requirements at elevated temperatures than did subtropical varieties of the same species in Hawaii [USA]. Photosynthesis:respiration (P:R) ratios were significantly and negatively related with temperature between 18.degree.-31.degree. C for all Hawaiian corals, whereas at Enewetak this ratio generally showed a curvilinear relationship for this temperature range. Extrapolations of P:R regressions on temperatures to a value of 2.0 (estimated as a minimum required for long-term functional autotrophy) coincide for Hawaiian specimens with published upper lethal temperatures. Extrapolation of P:R regressions for Enewetak specimens at temperatures > 25.degree. C suggests lethal temperatures for these corals to be 2.degree.-5.degree. C higher than for Hawaiian corals, in good agreement with recent experimental findings. Interspecific differences in P:R temperature regressions for Hawaiian corals correlating with upper lethal temperature tolerances are described.