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Shrub expansion in tundra ecosystems : dynamics, impacts and research priorities
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
Recent research using repeat photography, long-term ecological monitoring and dendrochronology has documented shrub expansion in arctic, high-latitude and alpine tundra ecosystems. Here, we (1) synthesize these findings, (2) present a conceptual framework that identifies mechanisms and constraints on shrub increase, (3) explore causes, feedbacks and implications of the increased shrub cover in tundra ...