Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.
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Transcript of Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.
![Page 1: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/1.jpg)
Species richness and species pool size variation across pH gradients in Southern Blue
Ridge Forests
Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.
![Page 2: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/2.jpg)
Should characteristics of a regional flora reflect the relative abundance of a soil type over the region’s evolutionary history?
![Page 3: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/3.jpg)
High pH specialists in the flora of Central Europe
Richness and edaphic characteristics vary according to the evolutionary centers of a regional flora (Pärtel 2002)
Central European Scenario
![Page 4: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/4.jpg)
Central European Scenario
Ewald (in press) cites:
Dominance of calcium-rich environs around the time of the last glaciations
Recent environmental bottleneck
![Page 5: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/5.jpg)
How might these hypotheses be applied to the Southeastern USA?
Southern Blue Ridge Mountains have always had primarily acidic soils.
The flora of the Southern Blue Ridge would be expected to be acidophilic.
Southeastern USA Scenario
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Southeastern USA Scenario
Does the Southern Blue Ridge exhibit a negative relationship between pH and species richness as implied by the findings of Pärtel and Ewald?
No.
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Average number of species in 100-plot segments along a pH gradient
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Southeastern USA Scenario
How is the flora of the Southern Blue Ridge distributed across the pH gradient?
![Page 9: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/9.jpg)
Species pool for a pH range calculated as the total number of species occurring in a set of 10,000 species occurrences
![Page 10: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/10.jpg)
Genus pool for a pH range calculated as the total number of species occurring in a set of 10,000 species occurrences
![Page 11: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/11.jpg)
Family pool for a pH range calculated as the total number of species occurring in a set of 10,000 species occurrences
![Page 12: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/12.jpg)
Southeastern USA Scenario
How specialized is the flora of the Southern Blue Ridge across the pH gradient?
![Page 13: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/13.jpg)
Species accumulation along the pH gradient based upon the total pH range of observed occurrences
![Page 14: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/14.jpg)
Species accumulation along the pH gradient based upon the total pH range of observed occurrences
![Page 15: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/15.jpg)
Species accumulation along the pH gradient based upon the total pH range of observed occurrences
![Page 16: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/16.jpg)
Cumulative species occurrences and cumulative species median positions encountered when moving across the pH gradient
![Page 17: Joel M. Gramling, Robert K. Peet, Jason D. Fridley, and Thomas R. Wentworth.](https://reader030.fdocuments.us/reader030/viewer/2022033104/56813099550346895d967a5f/html5/thumbnails/17.jpg)
Conclusions
Southern Blue Ridge diversity at the species, genus and family level is positively correlated to soil pH
Observed species pool is biased toward basic soils
Lack of high pH specialists in Southern Blue Ridge flora
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Acknowledgements