Rhodolith seabeds are habitats underpinned by free-living calcareous macroalgae. We partitioned the relevance of the scale of temporal (four seasons throughout two successive years) and spatial (three depth strata: 18, 25 and 40 m) variation on the diversity, structure and abundance of amphipod assemblages living in rhodolith seabeds from Gran Canaria Island. In total, 3996 individuals, belonging to 32 taxa, were identified. Multivariate analyses showed consistent differences in assemblage structure among seasons and depths; more diverse and abundant amphipod assemblages were often observed during spring at 18- and 25-m than at 40-m depth. Ovigerous females of Gammaropsis ostroumowi and Ampithoe ramondi were observed mainly at 18 and 25 m. Juveniles of both species were exclusively recorded at 18 and 25 m, so denoting a clear segregation in their population structure with depth. In summary, this study has demonstrated that the ecological pattern of amphipods associated with rhodolith seabeds can vary greatly across both time (seasons) and space (depth).

中文翻译：

---

与红石海床相关的片脚类群落的时空变异性

Rhodolith 海床是由自由生活的钙质大型藻类支撑的栖息地。我们划分了时间尺度（连续两年四个季节）和空间（三个深度地层：18、25 和 40 m）变化对生活在大加那利岛红石海床中的片脚类群落的多样性、结构和丰度的相关性. 总共确定了属于 32 个分类群的 3996 个人。多变量分析表明，不同季节和深度的组合结构存在一致的差异；在春季，在 18 米和 25 米的深度比在 40 米的深度经常观察到更多种类和丰富的片脚类动物组合。Gammaropsis ostroumowi 和 Ampithoe ramondi 的有生育能力的雌性主要在 18 和 25 m 处观察到。两个物种的幼鱼仅在 18 和 25 m 处记录，所以表示他们的人口结构与深度有明显的隔离。总之，这项研究表明，与红石海床相关的片脚类动物的生态模式在时间（季节）和空间（深度）上都有很大差异。