Poster # 149. Adkison, Greg^*,1, Gleeson, Scott¹, ¹ University of Kentucky, Lexington, KY Trends in light adaptations of forest herbs on a productivity gradient.

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Poster # 150. DICKSON, TIMOTHY^*,1, FOSTER, BRYAN¹, ¹ University of Kansas, Lawrence Constraints on plant diversity at high productivity: Isolating the role of light limitation.

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Poster # 151. HALVORSON, JONATHAN^*,1, BELESKY, DAVID¹, ¹ Appalachian Farming Systems Research Center, Beaver, WV Influence of forest canopy on microclimate, growth and quality of a cool-season perennial grass.

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Poster # 152. IYER, MEERA^*,1, KOBE, RICHARD¹, ¹ Michigan State University, East Lansing, Michigan The effects of light and soil fertility on seedling survival and growth in a dry tropical forest.

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Poster # 153. Dilustro, John^*,1, Collins, Beverly, Duncan, Lisa, Sharitz, Rebecca, ¹ University of Georgia, Aiken, SC, 29802 Vegetation, nitrogen mineralizaion and soil texture of Ft. Benning, Georgia upland forest sites.

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Poster # 154. Sveinbjornsson, Bjartmar^*,1, ¹ University of Alaska Anchorage, Anchorage, AK Growth of feather mosses in white and black spruce stands on the Tanana River floodplain, central Alaska.

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Poster # 155. Ibáńez, Inés^*,1, Clark, James¹, Lavine, Michael², Dietze, Michael¹, ¹ Biology Department, Durham, NC² ISDS, Durham, NC Role of environmental gradients on tree species recruitment: Comparisons within and between sites.

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Poster # 156. Traustason, Tumi^*,1, Smith, Matthew¹, Sveinbjörnsson, Bjartmar¹, Ruess, Roger², ¹ University of Alaska, Anchorage² University of Alaska, Fairbanks Climate, growth, and damage at the white spruce forest limit in three Alaskan mountain ranges.

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Poster # 157. Petru, Martina^*,1,2,3,4, Menges, Eric³, ¹ University of Potsdam, Potsdam, Germany² University of Tel Aviv, Tel Aviv, Israel³ Archbold Biological Station, Lake Placid, Florida⁴ University of South Bohemia, Ceske Budejovice, Czech Republic Mobile sand in the Florida scrub: Dynamic microsites for scrub herbs.

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Poster # 158. Bossuyt, Beatrijs^*,1, Hermy, Martin¹, ¹ Laboratory for Forest, Nature and Landscape Research, KULeuven, Leuven, Belgium Distribution patterns of plant species in isolated wet dune slacks: a test of alternative explanation models on three scale levels.

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Poster # 159. Chambers, Julie^*,1, Threlkeld, Stephen¹, ¹ University of Mississippi, Oxford Taxodium distichum interannual growth above and below a flood control dam:evidence of a hydrological signals.

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