Martin Luther University Halle-Wittenberg, Institute of Biology/Geobotany and Botanical Garden, Am Kirchtor 1, 06108, Halle, Germany.
German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, 04103, Leipzig, Germany.
Sci Rep. 2018 Jun 13;8(1):9076. doi: 10.1038/s41598-018-27017-9.
Depending on the strength of environmental filtering and competitive exclusion, successful colonizers of plant communities show varying degrees of similarity to resident species with respect to functional traits. For the present study, colonizer's performance was assessed in relation to the degree of fit with the resident community, and in addition, in relation to the community's trait profile and the environmental factors at the study locations. The two-year field experiment investigated the relative growth rates of 130 species that had been transplanted into German grassland communities varying in intensities of land-use. The transplanted species were selected in accordance with the following scenarios: species with highly similar or dissimilar traits to residents, species with highest degree of co-occurrence with resident species and species chosen randomly from the local species pool. The performance of transplanted phytometers depended on the scenario according to which the species were selected, on community trait diversity, and in addition, often on the interaction of both and on land use intensity. The total amount of explained variance in performance was low, but increased considerably when species identity was taken into account. In general, individuals in the co-occurrence scenario performed better than those selected based on trait information or those selected randomly. Different predictors were important in different seasons, demonstrating a limited temporal validity of performance models.
根据环境过滤和竞争排斥的强度，植物群落的成功殖民者在功能特征上与驻留物种表现出不同程度的相似性。在本研究中，殖民者的表现与与驻留群落的适应程度有关，此外，还与群落的特征概况和研究地点的环境因素有关。这项为期两年的野外实验调查了 130 种已被移植到德国草地群落的相对生长率，这些群落的土地利用强度不同。移植的物种是根据以下情景选择的：与居民具有高度相似或不同特征的物种、与居民物种高度共存的物种以及从当地物种库中随机选择的物种。移植的植物生理计的性能取决于根据物种选择的情景、群落特征多样性，此外，通常还取决于两者的相互作用和土地利用强度。性能的总解释方差很低，但当考虑到物种身份时，方差会大大增加。一般来说，共存情景中的个体比基于特征信息选择的个体或随机选择的个体表现更好。不同的预测因子在不同的季节很重要，这表明性能模型的时间有效性有限。
