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Tina M. Waliczek, Paula S. Williamson and Florence M. Oxley

Elton’s (1958) seminal work advanced the field of invasive species ecology and our understanding of the negative impacts of invasive species. For decades, the scientific community has been aware of the serious threat invasive species pose to

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Tina M. Waliczek, Kathryn M. Parsley, Paula S. Williamson and Florence M. Oxley

Very few ecosystems in the world are completely free of introduced species, and an increasing proportion of habitats is becoming dominated by them ( Pysek and Richardson, 2010 ). Invasive species decrease species diversity ( McGeoch et al., 2010

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Kenneth W. Leonhardt

With human movement comes the arrival of invasive species. Since humans started migrating to new places, new plants intentionally came with them for agricultural or ornamental purposes. New plants also came unintentionally, via seeds that hitchhiked

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Florence M. Oxley, Tina M. Waliczek and Paula S. Williamson

More than 50 years ago, Elton (1958) warned of an impending global environmental crisis resulting from the spread of nonnative, invasive species. Today, nonnative, invasive species are recognized as one of the largest and most serious threats to

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Lyn A. Gettys

Non-native invasive species pose a significant threat to aquatic ecosystems and can disrupt the use of invaded systems. For example, alien plants often outcompete indigenous flora and form monocultures that cannot be used by native fauna, which

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William Spencer and Justin Williams

The state of Texas consists of roughly 4800 species of vascular plants. In 1970, it was estimated that 200 of these were introduced species. By 2003, the number of introduced species almost doubled to 350. Using the Atlas of the Vascular Plants of Texas, a database was compiled listing the invasive species in Texas and which of the 254 counties they inhabited. This database was then converted into a GIS platform that allowed us to analyze those data spatially. With these data, we were able to calculate the actual number of invasive species per county. In addition, these data were used to predict possible points of invasive species introduction, the rate of spread for certain problematic species, routes of migration, and to isolate counties under threat of possible infestation.

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Andrzej K. Noyszewski, Neil O. Anderson, Alan G. Smith, Andrzej Kilian, Diana Dalbotten, Emi Ito, Anne Timm and Holly Pellerin

( Olsen and Chong, 1991 ; Sheaffer et al., 2008 ). Unfortunately, reed canarygrass is one of the worst invasive species in North American wetlands. In Wisconsin, it dominates ≈11% of wetlands, and in Minnesota, Washington, and Quebec, reed canarygrass is

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Neil O. Anderson

[propagule pressure hypothesis ( Colautti et al., 2006 )]. Other factors that have occurred in the history of studying invasive species leading to spurious assumptions regarding spread and control include ignorance of historical distribution of the species

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Jen A. Sembera, Tina M. Waliczek and Erica J. Meier

Invasive species pose a threat to plant and wildlife communities worldwide and are now considered to be a major detrimental factor of global change ( Sakai et al., 2001 ). Exotic invasive aquatic species negatively impact local biodiversity

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Jen A. Sembera, Erica J. Meier and Tina M. Waliczek

with the local tourism industry ( Gaskill, 2015 ; Texas General Land Office, 2007 ). Sargassum was added to the Global Invasive Species Database in 2011 ( Invasive Species Specialist Group, 2011 ) and has been identified along the shorelines of North