Journal ArticleDOI
Progress toward understanding the ecological impacts of nonnative species
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TLDR
19 testable hypotheses that explain temporal and spatial variation in impact are identified and reviewed and highlight the importance of the functional ecology of the nonnative species and the structure, diversity, and evolutionary experience of the recipient community as general determinants of impact.Abstract:
A predictive understanding of the ecological impacts of nonnative species has been slow to develop, owing largely to an apparent dearth of clearly defined hypotheses and the lack of a broad theoretical framework. The context dependency of impact has fueled the perception that meaningful generalizations are nonexistent. Here, we identified and reviewed 19 testable hypotheses that explain temporal and spatial variation in impact. Despite poor validation of most hypotheses to date, evidence suggests that each can explain at least some impacts in some situations. Several hypotheses are broad in scope (applying to plants and animals in virtually all contexts) and some of them, intriguingly, link processes of colonization and impact. Collectively, these hypotheses highlight the importance of the functional ecology of the nonnative species and the structure, diversity, and evolutionary experience of the recipient community as general determinants of impact; thus, they could provide the foundation for a theoretical framework for understanding and predicting impact. Further substantive progress toward this goal requires explicit consideration of within-taxon and across-taxa variation in the per capita effect of invaders, and analyses of complex interactions between invaders and their biotic and abiotic environments.read more
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Impacts of invasive plants on animal diversity in South Africa : a synthesis
TL;DR: This study identifies information gaps and research priorities at the country level with a view to informing monitoring and conservation efforts, such as alien plant removal and control programmes, and ensuring that endemic terrestrial animal diversity is maintained.
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Can invasive habitat-forming species play the same role as native ones? The case of the exotic marine macroalga Rugulopteryx okamurae in the Strait of Gibraltar
Carlos Navarro-Barranco,Carlos Navarro-Barranco,B. Muñoz-Gómez,D. Saiz,Macarena Ros,Macarena Ros,José M. Guerra-García,María Altamirano,Enrique Ostalé-Valriberas,Juan Moreira +9 more
TL;DR: The results suggest that morphological similarities among habitat-forming species do not always allow predicting of whether the invasive taxa are functionally equivalent to native ones, and highlight the relevance of fine taxonomical resolution for revealing complex impacts of invasive macroalgae.
New Zealand’s fresh waters: Values, state, trends and human impacts
TL;DR: The NPS-FM attributes define attributes of fresh water, including physical, chemical and biological properties, which support particular values such as ‘human health for recreation’ as mentioned in this paper.
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Exotic flower visitors exploit large floral trait spaces resulting in asymmetric resource partitioning with native visitors
Jonas Kuppler,Maren K. Höfers,Wolfgang Trutschnig,Arne C. Bathke,Jesse A. Eiben,Curtis C. Daehler,Robert R. Junker +6 more
TL;DR: The asymmetry in resource use of native and exotic flower visitors suggests a potential advantage in resource exploitation of the latter, potentially explaining their success in Hawaiian ecosystems.
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A Framework for Evaluating Heterogeneity and Landscape-Level Impacts of Non-native Aquatic Species
TL;DR: This work synthesizes the current understanding of key components of landscape-scale non-native species impacts: geographic range, abundance, and local impacts, which enables understanding of non- native species impacts at broader spatial scales.
References
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