Abstract Although extensive studies have been made on Posidonia oceanica ecosystems, in terms of their phenological characteristics, shoot density, biomass, and associated faunal assemblages, little attention has been given to the depth distribution of this species in the Adriatic Sea. The depth limits of the Mediterranean endemic seagrass P. oceanica growing along the eastern coast of the Croatian Adriatic Sea were examined by the use of SCUBA diving. Fifty-two independent measurements show that the lower depth limit of P. oceanica in the Croatian Adriatic Sea ranges from 24 m in the north to 36 m in the south, with a strong latitudinal gradient. The information on maximum depth distribution is an important asset when the increased human pressure and rapid environmental changes pose a threat to the survival of this slow-growing marine species.

中文翻译：

---

Posidonia Oceanica 沿亚得里亚海东部纬度梯度的深度下限

摘要 尽管对 Posidonia Oceanica 生态系统进行了广泛的研究，但从它们的物候特征、枝条密度、生物量和相关的动物群落等方面来看，该物种在亚得里亚海的深度分布很少受到关注。通过使用 SCUBA 潜水检查了在克罗地亚亚得里亚海东海岸生长的地中海特有海草 P. Oceanica 的深度限制。52 次独立测量表明，克罗地亚亚得里亚海 P. Oceanica 的深度下限从北部的 24 m 到南部的 36 m，具有强烈的纬度梯度。当人类压力的增加和环境的快速变化对这种生长缓慢的海洋物种的生存构成威胁时，关于最大深度分布的信息是一项重要的资产。