Predicting effects of invasion processes of Eurasian floodplain willows in Patagonia

近年来，欧亚柳在巴塔哥尼亚河流系统中的自然传播具有显著的重要性。可以认为，洪堡柳是通过改变非生物条件和竞争过程，受到入侵柳或灌木优势地位的影响。此外，在分析柳属植物入侵的影响时，必须考虑到杂交过程。巴塔哥尼亚原生柳树与外来柳树相互作用过程的研究，包括招募-生境相互作用、竞争以及遗传和进化过程的研究，为木本先驱物种入侵过程的基础研究以及种群生物学和短期进化提供了一个特殊的机会。我们的目标是深入了解本地和非本地柳的补充和植被模式背后的生态过程，通过栖息地模型预测巴塔哥尼亚河流和河流延伸的柳入侵的进一步过程及其对洪堡蒂亚纳种群的影响，评估破碎化和渗入对洪堡蒂亚纳的威胁，评估入侵的黄柳和脆弱柳的遗传多样性的空间组织。研究结果将为巴塔哥尼亚地区和国家柳树管理提供依据。

In recent years the natural spread of Eurasian willows in Patagonian river systems has dramatically increased in significance. It can be assumed that the native Salix humboldtiana is affected by the dominance of invasive Salix trees or shrubs through changed abiotic conditions and competition processes. Furthermore, hybridization processes have to be taken into account when analysing the impacts of Salix invasions. The study of the interaction processes between native and non-native willow species in Patagonia including studies on recruitment-habitat interactions, competition as well as genetic and evolutionary processes provide an exceptional opportunity for basic research in the field of invasion processes as well as in the population biology and short term evolution of woody pioneer species. Our aim is to provide insights into the ecological processes behind native and non-native Salix recruitment and vegetation patterns, to predict the further process of Salix invasions at rivers and river stretches in Patagonia and its impact on Salix humboldtiana populations by habitat modelling, to assess the threat to Salix humboldtiana by fragmentation and introgression and to evaluate the spatial organisation of genetic diversity of invaded Salix x rubens and S. fragilis. The results will provide a basis for regional and national willow management in Patagonia.