Li Mingyan, Jiang Siyu, Wang Tong, Wang Hui, Xing Lijun, Li Haimei, Sun Yingkun, Guo Xiao
College of Landscape Architecture and Forestry, Qingdao Agricultural University, No. 700 Changcheng Road, Qingdao 266109, P.R. China.
AoB Plants. 2024 May 20;16(3):plae028. doi: 10.1093/aobpla/plae028. eCollection 2024 Jun.
Land-use change and tourism development have seriously threatened the ecosystems of coastal protection forests and beaches. Light and nutrients are spatially heterogeneously distributed between the two ecosystems. Clonal plants, such as , which play a crucial role in maintaining the ecological stability of coastal habitats, are likely to encounter diverse environments. In this study, we investigated clonal integration and the division of labour in under heterogeneous (high nutrient and low light [HNLL]; low nutrient and high light [LNHL]) and homogeneous habitats. We cultivated pairs of connected and severed ramets of in these environments. Our results showed the total biomass (TB) of connected ramets was higher than that of severed ramets in heterogeneous environments, suggesting clonal integration enhances growth in heterogeneous habitats. The root shoot ratio was significantly lower in HNLL than in LNHL conditions for connected ramets, demonstrating a division of labour in growth under heterogeneous conditions. However, parameters of clonal propagation of did not significantly differ between connected and severed ramets in heterogeneous environments, indicating no division of labour in clonal propagation. In homogeneous environments, the growth of did not benefit from clonal integration. Connected ramets in heterogeneous habitats exhibited higher TB than in homogeneous habitats. The TB of one ramet in HNLL was consistently higher than that in LNHL, irrespective of ramet's states, which suggests that high soil nutrients may enhance the growth. We conclude that has the capability of clonal integration to achieve high biomass in heterogeneous but not in homogeneous conditions, and the establishment of coastal protection forests (high nutrient and low light) may foster the growth of .
土地利用变化和旅游业发展严重威胁着沿海防护林和海滩的生态系统。光和养分在这两个生态系统之间呈空间异质分布。克隆植物，如 ，在维持沿海栖息地的生态稳定性方面发挥着关键作用，它们可能会遇到多样化的环境。在本研究中，我们调查了 在异质（高养分和低光照[HNLL]；低养分和高光照[LNHL]）和同质栖息地中的克隆整合及分工情况。我们在这些环境中培养了 相连和分离的分株对。我们的结果表明，在异质环境中，相连分株的总生物量（TB）高于分离分株，这表明克隆整合增强了异质栖息地中的生长。对于相连分株，HNLL条件下的根冠比显著低于LNHL条件，这表明在异质条件下生长存在分工。然而， 在异质环境中相连和分离分株之间的克隆繁殖参数没有显著差异，这表明克隆繁殖中不存在分工。在同质环境中， 的生长并未从克隆整合中受益。异质栖息地中的相连分株表现出比同质栖息地更高的TB。无论分株状态如何，HNLL中一个分株的TB始终高于LNHL中的分株，这表明高土壤养分可能会促进生长。我们得出结论， 在异质而非同质条件下具有通过克隆整合实现高生物量的能力，并且沿海防护林（高养分和低光照）的建立可能会促进 的生长。
