CIB Associates
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Browsing CIB Associates by Author "Dawson, W."
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- ItemData descriptor: Pacific introduced flora (PaciFLora)(2021) Wohlwend, M.R.; Craven, D.; Weigelt, P.; Seebens, H.; Winter, M.; Kreft, H.; Dawson, W.; Essl, F.; van Kleunen, M.; Pergl, J.; Pyšek, P.; Space, J.; Thomas, P.; Knight, T.The Pacific region has the highest density of naturalized plant species worldwide, which makes it an important area for research on the ecology, evolution and biogeography of biological invasions. While different data sources on naturalized plant species exist for the Pacific, there is no taxonomically and spatially harmonized database available for different subsets of species and islands. A comprehensive, accessible database containing the distribution of naturalized vascular plant species in the Pacific will enable new basic and applied research for researchers and will be an important information source for practitioners working in the region.Here, we present PacIFlora, an updated and taxonomically standardized list of naturalized species, their unified nativeness, cultivation and invasiveness status, and their distribution across the Pacific Ocean, including harmonized location denommination. This list is based on the two largest databases on naturalized plants for the region, specifically the Pacific Island Ecosystems at Risk (PIER) and the Global Naturalized Alien Flora (GloNAF) databases. We provide an outlook for how this database can contribute to numerous research questions and conservation efforts.
- ItemRole of diversification rates and evolutionary history as a driver of plant naturalization success(2021) Lenzner, B.; Magallon, S.; Dawson, W.; Kreft, H.; Konig, C.; Pergl, J.; Pysek, P.; Weigelt, P.; van Kleunen, M.; Winter, M.; Dullinger, S.; Essl, F.Human introductions of species beyond their natural ranges and their subsequent establishment are defining features of global environmental change. However, naturalized plants are not uniformly distributed across phylogenetic lineages, with some families contributing disproportionately more to the global alien species pool than others. Additionally, lineages differ in diversification rates, and high diversification rates have been associated with characteristics that increase species naturalization success. Here, we investigate the role of diversification rates in explaining the naturalization success of angiosperm plant families. We use five global data sets that include native and alien plant species distribution, horticultural use of plants, and a time-calibrated angiosperm phylogeny. Using phylogenetic generalized linear mixed models, we analysed the effect of diversification rate, different geographical range measures, and horticultural use on the naturalization success of plant families. We show that a family's naturalization success is positively associated with its evolutionary history, native range size, and economic use. Investigating interactive effects of these predictors shows that native range size and geographic distribution additionally affect naturalization success. High diversification rates and large ranges increase naturalization success, especially of temperate families. We suggest this may result from lower ecological specialization in temperate families with large ranges, compared with tropical families with smaller ranges.