Impact of Non-Native Birds on Native Ecosystems: A Global Analysis.
TLDR
Hybridization and disease transmission were the most important impacts, affecting the population and community levels, and ecosystem-level impacts, such as structural and chemical impacts were detected.Abstract:
Introduction and naturalization of non-native species is one of the most important threats to global biodiversity. Birds have been widely introduced worldwide, but their impacts on populations, communities, and ecosystems have not received as much attention as those of other groups. This work is a global synthesis of the impact of nonnative birds on native ecosystems to determine (1) what groups, impacts, and locations have been best studied; (2) which taxonomic groups and which impacts have greatest effects on ecosystems, (3) how important are bird impacts at the community and ecosystem levels, and (4) what are the known benefits of nonnative birds to natural ecosystems. We conducted an extensive literature search that yielded 148 articles covering 39 species belonging to 18 families -18% of all known naturalized species. Studies were classified according to where they were conducted: Africa, Asia, Australasia, Europe, North America, South America, Islands of the Indian, of the Pacific, and of the Atlantic Ocean. Seven types of impact on native ecosystems were evaluated: competition, disease transmission, chemical, physical, or structural impact on ecosystem, grazing/ herbivory/ browsing, hybridization, predation, and interaction with other non-native species. Hybridization and disease transmission were the most important impacts, affecting the population and community levels. Ecosystem-level impacts, such as structural and chemical impacts were detected. Seven species were found to have positive impacts aside from negative ones. We provide suggestions for future studies focused on mechanisms of impact, regions, and understudied taxonomic groups.read more
Citations
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The ‘known unknowns’ of invasive species impact measurement
TL;DR: It is found that, field-wide, published measures of invasive species’ impacts are highly skewed toward those measured at the population or community-level with scarce information on impacts at other biological scales (e.g., physiology, behavior), and existing impact evidence stems most often from one-off studies of single invasive species.
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Application of the Environmental Impact Classification for Alien Taxa (EICAT) to a global assessment of alien bird impacts
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Jan O. Engler,Jan O. Engler,Darius Stiels,Kathrin Schidelko,Diederik Strubbe,Diederik Strubbe,Diederik Strubbe,Petra Quillfeldt,Mattia Brambilla +8 more
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Sabrina Kumschick,Giovanni Vimercati,F. Andre de Villiers,Mohlamatsane M. Mokhatla,Sarah J. Davies,Corey J. Thorp,Alexander D. Rebelo,G. John Measey +7 more
TL;DR: Impact assessment with different scoring tools : how well do alien amphibian assessments match?
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TL;DR: The long-term effects of invasive rose-ringed parakeets on the largest known population of a threatened bat species, the greater noctule, located in an urban park, indicate a strong impact through site displacement and killing of competitors, and highlight the need for long- term research to identify unexpected impacts that would otherwise be overlooked.
References
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Impacts of biological invasions: what's what and the way forward
Daniel Simberloff,Jean-Louis Martin,Piero Genovesi,Virginie Maris,David A. Wardle,James Aronson,James Aronson,Franck Courchamp,Bella S. Galil,Emili García-Berthou,Michel Pascal,Petr Pyšek,Petr Pyšek,Ronaldo Sousa,Ronaldo Sousa,Eric Tabacchi,Montserrat Vilà +16 more
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Positive interactions of nonindigenous species: invasional meltdown?
TL;DR: There is little evidence that interference among introduced species at levels currently observed significantly impedes further invasions, and synergistic interactions among invaders may well lead to accelerated impacts on native ecosystems – an invasional ‘meltdown’ process.
Journal ArticleDOI
The problems with hybrids: setting conservation guidelines
TL;DR: This work provides a categorization of hybridization to help guide management decisions and recognizes that nearly every situation involving hybridization is different enough that general rules are not likely to be effective.
Journal ArticleDOI
Plant invasions--the role of mutualisms.
TL;DR: The view that tightly coevolved, plant‐vertebrate seed dispersal systems are extremely rare is supported and perspectives on mutualisms in screening protocols will improve the ability to predict whether a given plant species could invade a particular habitat.
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