1 Ecoinformatics & Biodiversity, Faculty of Science, Aarhus University, Aarhus University2 Department of Computer Science, Faculty of Science, Aarhus University, Aarhus University3 Department of Bioscience - Ecoinformatics and Biodiversity, Department of Bioscience, Science and Technology, Aarhus University4 DANDRITE - DANDRITE Office, DANDRITE, Interfaculty, Aarhus University5 Department of Bioscience - Ecoinformatics and Biodiversity, Department of Bioscience, Science and Technology, Aarhus University6 DANDRITE - DANDRITE Office, DANDRITE, Interfaculty, Aarhus University
English yew Taxus baccata L. has become extinct or rare in many parts of Europe. Here we investigate the status of the only natural population persisting in Denmark. While many other yew populations are declining, the Danish population increased from <200 individuals in 1925 to >2000 in 1998. This was most likely due to the thinning of the tree stand at this site, as reproductive activity, strobilus production, and recruitment were enhanced at better lit microsites. The declining status of other populations is probably often caused by succession from open woodland to dense forest. The light dependency is consistent with the Quaternary history of yew. The sex ratio of the Danish yew population was female-biased, probably due to chance. Yew invaded forest areas neighbouring source populations at rates of 3 m yr−1, but forest management impeded this process.
Biological Conservation, 1999, Vol 88/2, Issue Artikel 4, p. 173-182
Forest management; Taxus baccata; Tree recruitment; Understorey light availability; Yew decline