Lv Tian, Guan Xin, Fan Shufeng, Han Chen, Gao Zhongyao, Liu Chunhua
The National Field Station of Freshwater Ecosystem of Liangzi Lake College of Life Science Wuhan University Wuhan China.
Ecol Evol. 2022 Feb 14;12(2):e8615. doi: 10.1002/ece3.8615. eCollection 2022 Feb.
The relationships between producers (e.g., macrophytes, phytoplankton and epiphytic algae) and snails play an important role in maintaining the function and stability of shallow ecosystems. Complex relationships exist among macrophytes, epiphytic algae, phytoplankton, and snails. We studied the effects of snail communities (consisting of , , , and ) on the biomass of phytoplankton and epiphytic algae as well as on the growth of three species of submerged macrophytes (, , and one exotic submerged plant, ) in a 90-day outdoor mesocosm experiment conducted on the shore of subtropical Lake Liangzihu, China. A structural equation model showed that the snail communities affected the submerged macrophytes by grazing phytoplankton and epiphytic algae (reduction in phytoplankton Chl- and epiphytic algal abundance), enhancing the biomass of submerged macrophytes. Highly branched macrophytes with high surfaces and morphologies and many microhabitats supported the most snails and epiphytic algae (the biomass of the snail communities and epiphytic algae on . was greater than that on . ), and snails preferred to feed on native plants. Competition drove the snails to change their grazing preferences to achieve coexistence.
生产者（如大型植物、浮游植物和附生藻类）与蜗牛之间的关系在维持浅水生态系统的功能和稳定性方面发挥着重要作用。大型植物、附生藻类、浮游植物和蜗牛之间存在着复杂的关系。在中国亚热带梁子湖岸边进行的一项为期90天的室外中型生态系统实验中，我们研究了蜗牛群落（由 、 、 和 组成）对浮游植物和附生藻类生物量以及三种沉水大型植物（ 、 和一种外来沉水植物 ）生长的影响。结构方程模型表明，蜗牛群落通过啃食浮游植物和附生藻类（降低浮游植物叶绿素 和附生藻类丰度）影响沉水大型植物，从而增加沉水大型植物的生物量。具有高表面积、形态和许多微生境的高度分支大型植物支持最多的蜗牛和附生藻类（ 上蜗牛群落和附生藻类的生物量大于 上的），并且蜗牛更喜欢取食本地植物。竞争促使蜗牛改变其啃食偏好以实现共存。
