全球变化对外来种无瓣海桑扩散和建群的驱动效应

项目名称： 全球变化对外来种无瓣海桑扩散和建群的驱动效应

项目编号： No.31270581

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 生物科学

项目作者： 陈鹭真

作者单位： 厦门大学

项目金额： 81万元

中文摘要： 无瓣海桑是原产于孟加拉国的速生红树植物，是广泛应用于我国红树林湿地恢复的造林树种。在我国，无瓣海桑的扩散、速生和生态位竞争能力引起了人们对其入侵性的担忧。气候变暖和海平面上升是影响红树林生长和分布的关键因子，将改变甚至加剧无瓣海桑的入侵。本研究围绕气候变暖和海平面上升对无瓣海桑扩散、种群建立和种间竞争的驱动效应这一科学问题，在不同纬度引种区内，采用野外调查、野外控制实验和温室人工潮汐控制实验等手段，模拟大气增温、海平面上升和种间竞争等多因子协同作用，研究不同纬度无瓣海桑与乡土红树植物秋茄的繁殖体特性、生长和潮间带适应性。在揭示无瓣海桑的扩散特性和速生机理的同时，阐明全球变化驱动下无瓣海桑入侵潜力演变的过程和机制。研究结果将为准确评估和预测无瓣海桑的入侵性，及其对未来气候变化的响应和适应策略具有极其重要的理论和实践意义，将为红树林湿地恢复的实践工作提供理论依据。

中文关键词： 红树林；生物入侵；气候变暖；海平面上升；控制实验

英文摘要： Sonneratia apetala, a mangrove species native to Bangladesh, is currently used extensively for mangrove restoration in China because of its fast growth and adaptation properties. However, precisely because of its fast growth and successful establishment in new habitats, its potential invasiveness has become an increasing concern. Global changes are likely to significantly increase the invasion potential of some non-native plants, potentially leading to population explosions. Thus, there is an urgent need to investigate how S. apetala's major invasion processes-such as propagule dispersal, seedling establishment and interspecies competition with native mangrove species-will be affected by climate-related changes. We hypothesis that global changes, such as warming and sea level rise, will strongly promote the invasiveness of S. apetala in Chinese mangroves. To investigate this, field observations of population structures, seed products, and dispersal characteristics will be conducted in reforestation sites along a latitude gradient. We will also construct in-field elevation platforms for native and non-native mangrove seedlings in order to simulate the impacts of varying sea levels under current and projected climate conditions; these will also be located in multiple field sites across a range of latitudes. Throu

英文关键词： mangroves；biological invasions；global warming；sea level rise；manipulated experiment