绘制暖化珊瑚礁——应用多波束声学水柱分析确定受威胁鲍鱼栖息地

V. Lucieer, E. Flukes, J. Keane, S. Ling, A. Nau, Victor Shelamoff
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引用次数: 1

摘要

对海底栖息地的空间范围以及它们如何随时间变化的明确定义是生态系统管理的圣杯,特别是如果一个生态系统正在接近一个临界点,超过这个临界点就可能发生不可逆转的变化。在这里,我们生成并探索了一个新的数据集,用于管理澳大利亚塔斯马尼亚东部变暖的珊瑚礁,这将显著改善精细空间建模和管理所需的基线地图,即在区域尺度上既稳定又在水柱内高度解决。这一过程使海带植被的相对密度得以确定,该地区正被一种破坏性食草动物——长棘海胆(Centrostephanus rodgersii)的活动范围扩大所淹没。我们提出了一个新的在线工具,将多波束水柱声学数据可视化为高分辨率(50厘米)尺度的海带密度表面,覆盖海底地形图(跨越总直线距离594公里,总面积29.14平方公里),以揭示塔斯马尼亚东海岸的珊瑚礁结构类型,那里的鲍鱼栖息地受到海带损失的威胁。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mapping warming reefs—An application of multibeam acoustic water column analysis to define threatened abalone habitat
Robust definition of the spatial extent of seafloor habitats and how they may be changing through time is a holy grail for ecosystem management, particularly if an ecosystem is approaching a tipping point beyond which irreversible changes may occur. Here we generate and explore a new data set for the management of warming reefs in eastern Tasmania, Australia that will significantly improve the baseline maps required for fine-scaled spatial modelling and management that is, both robust at regional scales and is highly resolved within the water column. This procedure enabled the relative density of kelp vegetation to be identified in a region that is being overwhelmed by the range extension of a destructive grazer, the Longspined Sea Urchin, Centrostephanus rodgersii. We present a new online tool to visualize multibeam water column acoustic data as surfaces of kelp density at high resolution (50 cm) scale over seafloor terrain maps (spanning a total straight-line distance of 594 km and a total area of 29.14 km2) to reveal the types of reef structure on the East Coast of Tasmania where abalone habitat is threatened by kelp loss.
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