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首页> 外文期刊>Russian journal of marine biology >The Influence of Repetitive Thermal Stresses on the Dominance of Reef-Building Acropora spp. (Scleractinia) on Coral Reefs of the Maldive Islands
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The Influence of Repetitive Thermal Stresses on the Dominance of Reef-Building Acropora spp. (Scleractinia) on Coral Reefs of the Maldive Islands

机译：重复的热应力对造礁孔雀属的优势。 （Scleractinia）在马尔代夫群岛的珊瑚礁上

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The distribution and size-age structure of Acropora corals were studied in two Maldivian atolls that differ in their geographic position and sea surface temperature regimes. The frequency and strength of thermal anomalies for the last 2 decades had a significant influence on the abundance, mortality rates, and age structures of acroporid communities. The long-term temperature amplitude was higher and the maxima were more pronounced in the northernmost Ihavandippolu Atoll than those in the equatorial South Huvad-hoo Atoll. These differences resulted in a 10.4% mean cover of Acropora at Ihavandippolu Atoll, whereas the Acropora cover in the South Huvadhoo Atoll reached 59.5%. In the northern atoll, the coral mortality rate after the 2010 thermal anomaly was 3 times higher than that in the southern atoll. Younger acroporid colonies (up to 2 years old) dominated the northern atoll reefs, while the southern atoll showed a high proportion of older mature colonies. In both atolls, healthy table colonies of Acropora cytherea with a disk diameter greater than 2 m were observed that apparently survived three thermal anomalies since 1998. The mechanisms of acclimatization of Acropora and the prospects for its dominance in the Maldives under changing environmental conditions are discussed.
机译：在两个马尔代夫环礁中研究了Acropora珊瑚的分布和大小-年龄结构，这两个环礁的地理位置和海表温度不同。在过去的20年中，热异常的频率和强度对顶孢菌群落的丰度，死亡率和年龄结构具有重大影响。与最赤道的南Huvad-hoo Atoll相比，最北端的Ihavandippolu Atoll的长期温度振幅更高，最大值更明显。这些差异导致Ihavandippolu环礁的Acropora平均覆盖率为10.4％，而South Huvadhoo环礁的Acropora覆盖率为59.5％。在北部环礁，2010年热异常后的珊瑚死亡率是南部环礁的3倍。较年轻的角质层菌落（最多2岁）在北部环礁中占主导地位，而南部环礁则显示较高比例的较老的成熟菌落。在两个环礁中，均观察到圆盘直径大于2 m的健康棘轮螺盘菌，显然自1998年以来在3个热异常中幸免。讨论了不断变化的环境条件下，棘轮螺的驯化机制及其在马尔代夫的优势地位的前景。 。

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