Ecological and Evolutionary Misadventures of Spartina

Supplemental Material

Supplementary Data

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  Supplemental Figure 1: Changing genetic composition of Spartinaalterniflora and S. alterniflora × foliosa hybrids in San Francisco Bay. Percentages of S. alterniflora, F₁ hybrids, cryptic hybrids, and other large or plants suspected of hybridity, by RAPD genetic analysis. Numbers above the columns are the number of plants analyzed each year (data on F₁ hybrids in 1998, and cryptic hybrids in 1998 and 2002 were not available). Samples were collected throughout the SF Bay. See Hogle 2011a, her figure 1.5, for locations of plants suspected of hybridity, and her figure 1.7 for locations of cryptic hybrids.  Control work against large-statured plants began in 2004. The San Francisco Estuary Invasive Spartina Project (http://www.spartina.org) generously shared their data on cryptic hybrids.

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  Supplemental Figure 2: STRUCTURE diagram of genetic composition determined through 17 microsatellite loci of Spartina foliosa (1, blue), S. alterniflora from the US East/Gulf Coast (2, red) and a second source population (3, yellow), established hybrid plants (4 and 5 at Alameda, 8 at Hayward, 11 and 12 at Robert’s Landing), and 2003 and 2004 seedling cohorts (6 and 7 at Alameda, 9 and 10 at Hayward, 13 and 14 at Robert’s Landing). Alameda is 16 km north of Robert’s Landing and Hayward is 2 km further south from Robert’s Landing. Each bar represents the proportional membership in each group of an individual plant. Plants and seedlings reflect the genetic signature of each S. alterniflora source population. The arrow indicates an isolated, highly self-fertile plant at Robert’s Landing (solid green) that was the seed and pollen parent of large numbers of seedlings at Robert’s Landing in 2003 and 2004 (Sloop, Ayres & Strong 2009). Redrawn from Sloop, Ayres & Strong 2011.

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  Supplemental Figure 3: Clapper rail counts as compared to hybrid Spartina remaining. From http://www.spartina.org/project_documents/clapper_rails/project-clra2010.htm

  
  
  

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  Supplemental Figure 4: Spartina alterniflora remaining in Willapa Bay, WA through the herbicide spraying project. http://agr.wa.gov/PlantsInsects/Weeds/Spartina/docs/SpartinaReport2010.pdf

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  Download Supplemental Figures 1-4 as a single PDF.