Using airborne laser altimetry to estimate Sabellaria alveolata (Polychaeta: Sabellariidae) reefs volume in tidal flat environments
Using airborne laser altimetry to estimate Sabellaria alveolata (Polychaeta: Sabellariidae) reefs volume in tidal flat environments
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DOI：
10.1016/j.ecss.2010.07.014
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发表时间：
2010-12-10
影响因子：
2.8
通讯作者：
Populus, Jacques
中科院分区：
文献类型：
--
作者：
Noernberg, Mauricio Almeida;Fournier, Jerome;Populus, Jacques
本研究利用航片和LiDAR数字高程模型来量化潮间带复杂地貌的体积。本文首次估算了法国圣米歇尔山海湾的主要多毛类生物礁复合体的体积。臭柏是一种对环境有很大改变的工程物种。这种群居的造管环节动物形成了致密而坚固的生物碎屑粗沙生物礁，可达几公里(2)。自1970年以来，观察到珊瑚礁的数量急剧减少。当局限制了捕鱼活动，但珊瑚礁的健康状况没有任何明显的变化。海绵状珊瑚礁的体积估计为132 048 m(3)(圣安妮暗礁为96 301 m(3)，香槟暗礁为35 747 m(3))。还需要进一步进行激光雷达数据调查，以便能够理解和量化在珊瑚礁动态中起作用的吸积/侵蚀过程。由于珊瑚礁内部地形复杂多变，以裂缝、裂缝和孔洞为特征，而不是整个块体，需要进一步研究以更准确地计算珊瑚礁的体积。(C)2010爱思唯尔有限公司。保留所有权利。
This study has exploited aerial photographs and LiDAR digital elevation model to quantify intertidal complex landforms volume. A first volume estimation of the main sabellariid polychaete reef complex of the Bay of Mont-Saint-Michel - France is presented. The Sabellaria alveolata is an engineering species that heavily modifies its environment. This gregarious tube-building annelid forms dense and solid reefs of bioclastic coarse sand which can reach several km(2). Since 1970 a very strong decline of reefs has been observed. The authorities have curbed fishing activities without any noticeable changes in reef health status. The S. alveolata reef volume is estimated to be 132 048 m(3) (96 301 m(3) for Sainte-Anne reef and 35 747 m(3) for Champeaux reef). Further LiDAR data surveys will be needed to be able to understand and quantify the accretion/erosion processes in play in the reef dynamic. Because of the internal variability of topographic complexity of the reef, characterized by crevices, cracks, and holes rather than whole blocks, further studies are needed to calculate more accurately the volume of the reef. (C) 2010 Elsevier Ltd. All rights reserved.