Eric Hazelton
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plants’ ability to resist invasion. In Maine, we compared the clonal architecture and diversity of an invasive lineage (introduced
Phragmites ) and a noninvasive lineage (native Phragmites ) present in much of North America. This study is the fi rst on standscale
diversity using a sample size and systematic spatial-sampling scheme adequate for characterizing clonal structure in
Phragmites . Our questions included: (1) Does the structure and extent of clonal growth suggest that the potential for clonal
growth contributes to the invasiveness of the introduced lineage? (2) Is clonal growth common in the native lineage, acting as
a possible source of ecological resistance and resilience?
• Methods: Microsatellite markers were used to measure clonal sizes, architecture, and diversity within each lineage in stands
within four marshes in Maine.
• Key results: Clonal diversity measures indicated that clonal growth was significantly greater in stands of the native lineage than
in the introduced. While lineage was a consistent predictor of clonal diversity relative ranking, the marsh location was a much
stronger predictor of the absolute range of these values.
• Conclusions: Our results indicate an important role for clonal growth in the space consolidation of native Phragmites and could
explain why the introduced lineage, with stronger competitive traits, has not replaced the native where they co-occur. These
results with regard to clone size, size distributions, singleton occurrence, and clonal architecture provide some evidence for
stand development that follows a genotypic initial floristics model.
Read More: http://www.esajournals.org/doi/abs/10.1890/14-0434.1
plants’ ability to resist invasion. In Maine, we compared the clonal architecture and diversity of an invasive lineage (introduced
Phragmites ) and a noninvasive lineage (native Phragmites ) present in much of North America. This study is the fi rst on standscale
diversity using a sample size and systematic spatial-sampling scheme adequate for characterizing clonal structure in
Phragmites . Our questions included: (1) Does the structure and extent of clonal growth suggest that the potential for clonal
growth contributes to the invasiveness of the introduced lineage? (2) Is clonal growth common in the native lineage, acting as
a possible source of ecological resistance and resilience?
• Methods: Microsatellite markers were used to measure clonal sizes, architecture, and diversity within each lineage in stands
within four marshes in Maine.
• Key results: Clonal diversity measures indicated that clonal growth was significantly greater in stands of the native lineage than
in the introduced. While lineage was a consistent predictor of clonal diversity relative ranking, the marsh location was a much
stronger predictor of the absolute range of these values.
• Conclusions: Our results indicate an important role for clonal growth in the space consolidation of native Phragmites and could
explain why the introduced lineage, with stronger competitive traits, has not replaced the native where they co-occur. These
results with regard to clone size, size distributions, singleton occurrence, and clonal architecture provide some evidence for
stand development that follows a genotypic initial floristics model.
Read More: http://www.esajournals.org/doi/abs/10.1890/14-0434.1
036 - Interactions between non-native flora and native fauna in submerged, wetland, and riparian systems
The introduction and rapid spread of non-native plant species is a key contributor to global environmental change. Introduced plants in submerged, wetland, and riparian zones can affect aquatic and estuarine ecosystems by altering habitat structure, nutrient cycling, hydrology, and food availability, among other things. These modifications may have notable repercussions for communities of aquatic and wetland fauna both within and across trophic levels. In this session, we seek to synthesize research on interactions between non-native plants and native animals from a broad range of aquatic environments, including lakes, streams, and coastal estuaries. The emphasis will be on organismal (growth rates, development, fecundity, etc.) and community (species interactions, abundance, distribution, etc.) level effects for both non-native plants and native fauna. We hope to produce a perspectives paper elucidating specific traits or functional characteristics of non-native vegetation that affect aquatic and wetland fauna, with a focus on measurable characteristics that may be predictive across environments.