Short and long term feedback between vegetation and morphodynamic processes

植物群落的演变，物种和功能多样性，植被土壤协会，植被干扰和植被变化的反馈将在微观（殖民化），中观（干扰后恢复）和宏观尺度（景观变化）进行调查，考虑到时间片1850-1920年，1920-1980年，1980年-今天以及干扰和海拔梯度。我们假设（i）冰冻圈变化（二）植被、土壤和地貌/水文扰动之间存在密切的相互作用，导致植物作出特定的功能性反应;（三）扰动促进范围转移，迁徙物种具有特定的功能性特征;气候变化是各时间段植被变化的主要驱动力，1980年至今的时间段产生的影响最为显著。第一个假设将被测试沿着冰川前陆，概述了初级演替过程和演替物种的形态动力学过程的影响。第二个假设涉及植被反馈的地貌和/或洪水事件沿着海拔梯度从树线subboundredzone在所有三个研究领域。通过功能的方法，物种的反应进行了研究扰动和未扰动的网站。第三种方法将解释物种从低海拔向高海拔迁移的情况，以及干扰是否有助于物种从低海拔定居的问题。对于第四个假设，我们将分析和评估整个时间片的土地覆盖变化。通过多变量统计，植被数据将根据环境、地貌/水文和功能特征数据进行回归。所有数据都可作为模拟过去和未来植被的基线数据。

The evolution of plant communities, species and functional diversity, vegetation-soil-associations, feedback of the vegetation to disturbances and vegetation changes will be investigated at micro- (colonization), meso- (restoration after disturbance) and macroscales (landscape changes), considering the time slices 1850-1920, 1920-1980, 1980-today as well as disturbance and elevation gradients. We hypothesize that (i) cryospheric changes (glacier, permafrost, snow) influence colonization and community evolution; (ii) a close interaction exists between vegetation, soil and geomorphological/hydrological disturbances, resulting in specific functional plant responses; (iii) disturbances facilitate range shifts and the migrating species are characterized by specific functional traits; (iv) climate change is the essential driver of vegetation changes for the time slices, the most pronounced effects occurring for the time slice 1980-today. The first hypothesis will be tested along a glacier foreland, outlining processes of primary succession and effects of morphodynamic processes on successional species. The second hypothesis deals with vegetation feedback to geomorphological and/or flood events along elevation gradients from the treeline to the subnival zone at all three study areas. By means of a functional approach, responses of species are studied on disturbed and undisturbed sites. The third approach will account for species migrations from lower to higher altitudes and for the question if disturbances facilitate the establishment of species from lower altitudes. For the fourth hypothesis we will analyse and evaluate the land cover changes throughout the time slices. By means of multivariate statistics, vegetation data will be regressed on environmental, geomorphic/hydromorphic and functional trait data. All data serve as baseline data for modelling past and future vegetation.