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首页> 外文期刊>Marine ecology progress series >Structure and development of Hawaiian deep-water coral communities on Mauna Loa lava flows
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Structure and development of Hawaiian deep-water coral communities on Mauna Loa lava flows

机译：冒纳罗亚河熔岩流上夏威夷深水珊瑚群落的结构和发育

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Submarine lava flows on the leeward flank of the Island of Hawai'i, USA, were examined by submersible and remotely operated vehicles to understand the structure and development of deep-water coral communities. Three sites were selected where historically documented lava flows crossed older prehistoric flows, providing 3 pairs of lava substrates of different ages (61/400 yr, 134/2000 yr, 143/2330 yr) to compare and contrast with a nearby older coral community (15 000 yr) growing on fossil carbonate. The number of coral taxa, abundance, and colony size increased with substrate age on the 3 historical lava flows and fossil carbonate site, but not on the prehistoric flows. The faster-growing Coralliidae were the dominant taxa forming patches on the peaks of ridged terrain, while the slower-growing Antipatharia and Isididae were less abundant except at the fossil site where the community was dominated by the slowest-growing corals (including Kulamanamana haumeaae). A multivariate analysis of similarity of coral communities on lava flows found site, rather than substrate age, to be a better explanation for why paired flows were ecologically the same despite considerable age differences. The data suggest that hot, turbid, mineral-rich water from the more recent historical lava event re-initialized the community succession of the adjacent prehistoric lava substrate. Coral mortality would be greatest close to the edge of the historical flow with the expectation that survivorship would increase with distance from the impact. The survey transects were too short to detect a significant increase in the total coral community, but an increase was evident for the Coralliidae.
机译：通过潜水和远程操作的车辆检查了美国夏威夷岛背风面的海底熔岩流，以了解深水珊瑚群落的结构和发育。选择了三个地点，这些地点的历史记载的熔岩流与较早的史前熔岩流相交，提供了3对不同年龄（61/400年，134/2000年，143/2330年）的熔岩基质，与附近的一个较旧的珊瑚群落进行比较和对比（ 15 000 yr）在碳酸盐化石上生长。在3个历史熔岩流和碳酸盐化石位点上，珊瑚类群的数量，丰度和菌落的大小随基质年龄的增加而增加，但在史前流上却没有。生长较快的珊瑚科是在山脊地形的山峰上形成的主要分类单元，而生长较慢的Antipatharia和Isididae则较少，除非在化石以群落生长最慢的珊瑚（包括库拉曼纳玛娜乌梅科）为主导的地点。对熔岩流上珊瑚群落相似性的多变量分析发现了地点而不是基质年龄，这可以更好地解释为何成对的流在生态上是相同的，尽管年龄差异很大。数据表明，来自最近的历史性熔岩事件的热，浑浊，富含矿物质的水重新初始化了邻近的史前熔岩基质的群落演替。珊瑚死亡率在接近历史潮流的边缘时将是最大的，并期望生存距离将随着影响的增加而增加。调查样带太短，无法检测到整个珊瑚群落的显着增加，但珊瑚科的增加明显。

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