ABSTRACT

During 2014, 21 patches of Cymodocea nodosa were found in intertidal pools in Fuerteventura (Canary Islands). Pool substratum was mixed sand and rock, but mostly dominated by stone bottoms. Most plants were established with fully exposed rhizomes, filling small fissures without sediment. During subsequent sampling surveys between 2016 and 2019, the presence of these patches was consistent over time in an environment normally considered extreme for most seagrasses. As far as we know, the presence of Cymodocea nodosa patches in intertidal areas has not been observed previously in the Canary Islands. If the presence of C. nodosa patches in these intertidal pools is stable over time, it raises new environmental management and conservation questions for this endangered species in the Canary Islands. In addition, due to the current regression of C. nodosa meadows, our observations represent an optimistic perspective that underline the need for specific monitoring plans for this ecosystem.

摘要

2014年，在富埃特文图拉（加那利群岛）的潮间带池中发现了21片Cymodocea nodosa。池底是沙子和岩石的混合体，但大部分以石质底部为主。多数植物的根状茎完全裸露，充满了小裂缝，没有沉积物。在2016年至2019年之间进行的后续抽样调查中，在通常被认为对大多数海草而言极端的环境中，这些斑块的存在随时间变化是一致的。据我们所知，以前在加那利群岛没有观察到潮间带结节藻斑的存在。如果存在念珠菌这些潮间带中的斑块随时间推移是稳定的，这为加那利群岛的这一濒危物种提出了新的环境管理和保护问题。另外，由于当前C. nodosa草甸的退化，我们的观察结果代表了一种乐观的观点，突显了对该生态系统制定具体监测计划的需要。