Instituto Mediterráneo de Estudios Avanzados, IMEDEA (CSIC-UIB). Miquel Marques 21. 07190, Esporles, Illes Balears, Spain.
Instituto Mediterráneo de Estudios Avanzados, IMEDEA (CSIC-UIB). Miquel Marques 21. 07190, Esporles, Illes Balears, Spain.
Mar Environ Res. 2020 Dec;162:105076. doi: 10.1016/j.marenvres.2020.105076. Epub 2020 Aug 6.
The period between seed germination and successful seedling establishment is considered the most vulnerable phase for plant development. To better predict recruitment patterns within plant communities, it is essential to identify the abiotic constrains and biotic interactions that allow for the colonization of substrates by plant species. We evaluated which combination of factors are associated with successful survival and development of seedlings of the seagrass Posidonia oceanica in order to identify the most important microsite features acting together on recruitment success. Our results show that P. oceanica seedlings are rather specific in their environmental requirements during their first 18 months of life, when their development and survival are favored in microsites of consolidated substratum (solid rock, and to a lesser extent P. oceanica matte) covered by macroalgae (mainly crustose algae) and located in sheltered locations (with energy flux values not exceeding 7 × 10 kg s m s). After this phase, their probability of surviving becomes more independent from external conditions.
种子萌发到成功幼苗建立的阶段被认为是植物发育最脆弱的阶段。为了更好地预测植物群落内的繁殖模式，必须确定允许植物物种在基质上定殖的非生物限制因素和生物相互作用。我们评估了哪些因素组合与成功生存和发育有关，以确定对繁殖成功起作用的最重要的小生境特征。我们的结果表明，在最初的 18 个月里，海草波西多尼亚海洋的幼苗对环境的要求相当特殊，在有藻类（主要是壳状藻类）覆盖的固着基质（坚固的岩石，在较小程度上是波西多尼亚海草垫）和位于遮蔽位置（能量通量值不超过 7×10 kg s m s）的小生境中，它们的发育和生存更有利。在这个阶段之后，它们的生存概率变得更加独立于外部条件。
