Geological age and environments shape reef habitat structure
Geological age and environments shape reef habitat structure
复制标题
DOI：
10.1111/geb.13691
复制
发表时间：
2023-04
影响因子：
6.4
通讯作者：
Mollie Asbury;Nina Schiettekatte;C. Couch;Thomas Oliver;J. Burns;J. Madin
中科院分区：
文献类型：
--
作者：
Mollie Asbury;Nina Schiettekatte;C. Couch;Thomas Oliver;J. Burns;J. Madin
生境复杂性在全球生态系统的结构和功能中起着重要作用。在珊瑚礁上，栖息地的复杂性影响着生态系统的服务功能，如可收获的鱼类生物量和波浪能的衰减。在这里，我们测试了表面复杂性的三个描述符——粗糙度、分形维数和高度范围——与珊瑚礁的地质年龄（20 - 510万年）、深度（1-25米）、波浪暴露（1-306千瓦/米）、珊瑚覆盖（0-80%）和三种栖息地类型（聚集礁、岩石和巨石、铺装）的趋势。地点我们调查了夏威夷八个主要岛屿上的234个地点和4个纬度。时间周期2019年4月- 2019年7月。研究的主要分类群礁石建筑珊瑚。方法利用结构-运动摄影测量法估计三个表面描述符（粗糙度、分形维数和高度范围）。我们使用广义线性模型评估了这些描述符与地质珊瑚礁年龄、深度、波浪暴露、珊瑚覆盖和珊瑚礁栖息地类型之间的假设关系，这些模型考虑了调查设计。结果随着地质礁龄的增加，礁生境的粗糙性逐渐降低；分形维数（和珊瑚覆盖）随波浪暴露而减小；高度范围随深度减小。这些模式的变化可以用不同的栖息地类型和它们随时间形成的方式来解释。然而，这三种表面描述符在所有栖息地类型中都存在几何约束，因此栖息地在栖息地复杂性空间中占据明显不同的区域。本研究揭示了广泛的环境特征如何影响栖息地的结构复杂性，从而影响地质多样性，这是了解这些栖息地及其生态系统服务所支持的群落的重要第一步。
AimHabitat complexity plays an important role in the structure and function of ecosystems worldwide. On coral reefs, habitat complexity influences ecosystem services such as harvestable fish biomass and attenuation of wave energy. Here, we test how three descriptors of surface complexity—rugosity, fractal dimension, and height range—trend with the geological age of reefs (0.2–5.1 million years old), depth (1–25 m), wave exposure (1–306 kW/m), coral cover (0–80%), and three habitat types (aggregated reef, rock and boulder, and pavement).LocationWe surveyed across 234 sites and 4 degrees of latitude in the eight main Hawaiian Islands.Time PeriodApril 2019 – July 2019.Major Taxa StudiedReef building corals.MethodsWe estimate three surface descriptors (rugosity, fractal dimension and height range) using structure‐from‐motion photogrammetry. We evaluate hypothesized relationships between these descriptors and geological reef age, depth, wave exposure, coral cover and reef habitat type using generalized linear models that account for survey design.ResultsThe rugosity of reef habitats decreased with geological reef age; fractal dimension (and coral cover) decreased with wave exposure; and height range decreased with depth. Variations in these patterns were explained by the different habitat types and the way they are formed over time. Nonetheless, the three surface descriptors were geometrically constrained across all habitat types, and so habitats occupied distinctly different regions of habitat complexity space.Main ConclusionsThis study showed how broad environmental characteristics influence the structural complexity of habitats, and therefore geodiversity, which is an important first step toward understanding the communities supported by these habitats and their ecosystem services.