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Oceanography and Atmospheric Sciences and Meteorology
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Full-Text Articles in Physical Sciences and Mathematics
Similarity Of Introduced Plant Species To Native Ones Facilitates Naturalization, But Differences Enhance Invasion Success, Jan Divíšek, Milan Chytrý, Brian Beckage, Nicholas J. Gotelli, Zdeňka Lososová, Petr Pyšek, David M. Richardson, Jane Molofsky
Similarity Of Introduced Plant Species To Native Ones Facilitates Naturalization, But Differences Enhance Invasion Success, Jan Divíšek, Milan Chytrý, Brian Beckage, Nicholas J. Gotelli, Zdeňka Lososová, Petr Pyšek, David M. Richardson, Jane Molofsky
College of Arts and Sciences Faculty Publications
The search for traits associated with plant invasiveness has yielded contradictory results, in part because most previous studies have failed to recognize that different traits are important at different stages along the introduction–naturalization–invasion continuum. Here we show that across six different habitat types in temperate Central Europe, naturalized non-invasive species are functionally similar to native species occurring in the same habitat type, but invasive species are different as they occupy the edge of the plant functional trait space represented in each habitat. This pattern was driven mainly by the greater average height of invasive species. These results suggest that the …
Econullnetr: An R Package Using Null Models To Analyse The Structure Of Ecological Networks And Identify Resource Selection, Ian P. Vaughan, Nicholas J. Gotelli, Jane Memmott, Caitlin E. Pearson, Guy Woodward, William O.C. Symondson
Econullnetr: An R Package Using Null Models To Analyse The Structure Of Ecological Networks And Identify Resource Selection, Ian P. Vaughan, Nicholas J. Gotelli, Jane Memmott, Caitlin E. Pearson, Guy Woodward, William O.C. Symondson
College of Arts and Sciences Faculty Publications
Network analysis is increasingly widespread in ecology, with frequent questions asking which nodes (typically species) interact with one another and how strong are the interactions. Null models are a way of addressing these questions, helping to distinguish patterns driven by neutral mechanisms or sampling effects (e.g. relative abundance of different taxa, sampling completeness) from deterministic biological mechanisms (e.g. resource selection and avoidance), but few “off the shelf” tools are available. We present econullnetr, an r package combining null modelling and plotting functions for networks, with data-export tools to facilitate its use alongside existing network analysis packages. It models resource choices …