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Eight questions about invasions and ecosystem functioning
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DOI：10.1111/j.1461-0248.2012.01817.x.png)
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I pose eight questions central to understanding how biological invasions affect ecosystems, assess progress towards answering those questions and suggest ways in which progress might be made. The questions concern the frequency with which invasions affect ecosystems; the circumstances under which ecosystem change is most likely; the functions that are most often affected by invaders; the relationships between changes to ecosystems, communities, and populations; the long-term responses of ecosystems to invasions; interactions between biological invasions and other anthropogenic activities and the difficulty of managing undesirable impacts of non-native species. Some questions have been answered satisfactorily, others require more data and thought, and others might benefit from being reformulated or abandoned. Actions that might speed progress include careful development of trait-based approaches; strategic collection and publication of new data, including more frequent publication of negative results; replacement of expert opinion with hard data where needed; careful consideration of whether questions really need to be answered, especially in cases where answers are being provided for managers and policy-makers; explicit attention to and testing of the domains of theories; integrating invasions better into an ecosystem context; and remembering that our predictive ability is limited and will remain so for the foreseeable future.
Keyword:
Alien species
biodiversity
ecological engineering
ecosystem function
ecosystem management
exotic species
invasive species
long-term studies
non-native species
traits
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Conventional functional classification schemes underestimate the relationship with ecosystem functioning.png)
Ecology Letters
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Ecology LettersIF7.9
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