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Articles 1 - 6 of 6
Full-Text Articles in Life Sciences
Experimental Evidence For Selection Against Hybrids Between Two Interfertile Red Oak Species, Oliver Gailing, Ruhua Zhang
Experimental Evidence For Selection Against Hybrids Between Two Interfertile Red Oak Species, Oliver Gailing, Ruhua Zhang
College of Forest Resources and Environmental Science Publications
Reproductive isolation between related oak species within one taxonomic section is incomplete. Even though pre- and post-zygotic isolation mechanisms have been described for interfertile oak species, natural hybridization is common in contact zones between related oaks. The apparent restriction of inter-specific hybrids between ecologically divergent species to intermediate environments in contact zones suggests postzygotic isolation via environmental selection against hybrids in parental environments. Overrepresentation of hybrids in seeds as compared to adult trees provides additional indirect evidence for selection against hybrids. Here, we used genetic assignment analyses in progeny obtained from a sympatric stand of Quercus rubra and Quercus ellipsoidalis, …
Within-Canopy Experimental Leaf Warming Induces Photosynthetic Decline Instead Of Acclimation In Two Northern Hardwood Species, Kelsey R. Carter, Molly A. Cavaleri
Within-Canopy Experimental Leaf Warming Induces Photosynthetic Decline Instead Of Acclimation In Two Northern Hardwood Species, Kelsey R. Carter, Molly A. Cavaleri
College of Forest Resources and Environmental Science Publications
Northern hardwood forests are experiencing higher temperatures and more extreme heat waves, potentially altering plant physiological processes. We implemented in-situ leaf-level warming along a vertical gradient within a mature forest canopy to investigate photosynthetic acclimation potential of two northern hardwood species, Acer saccharum and Tilia americana. After 7 days of +3°C warming, photosynthetic acclimation was assessed by measuring differences between heated and control photosynthetic rates (Aopt) at leaf optimum temperatures (Topt). We also measured the effects of warming and height on maximum rates of Rubisco carboxylation, stomatal conductance, transpiration, and leaf traits: leaf …
Gene Network Analysis Of Poplar Root Transcriptome In Response To Drought Stress Identifies A Ptajaz3ptarap2.6-Centered Hierarchical Network, Madhumita Dash, Yordan S. Yordanov, Tatyana Georgieva, Hairong Wei, Victor Busov
Gene Network Analysis Of Poplar Root Transcriptome In Response To Drought Stress Identifies A Ptajaz3ptarap2.6-Centered Hierarchical Network, Madhumita Dash, Yordan S. Yordanov, Tatyana Georgieva, Hairong Wei, Victor Busov
College of Forest Resources and Environmental Science Publications
Using time-series transcriptomic data from poplar roots undergoing polyethylene glycol (PEG)-induced drought stress, we built a genetic network model of the involved putative molecular responses. We found that the network resembled a hierarchical structure. The highest hierarchical level in this structure is occupied by 9 genes, which we called superhubs because they were primarily connected to 18 hub genes, which are then connected to 2,934 terminal genes. We were only able to regenerate transgenic plants overexpressing two of the superhubs, suggesting that the majority of the superhubs might interfere with the regeneration process and did not allow recovery of transgenic …
Nondestructive Assessment Of Wood Members In A Viewing Tower In Potawatomi State Park, Door County, Wisconsin, Us, Robert Ross, Xiping Wang, C. Adam Senalik
Nondestructive Assessment Of Wood Members In A Viewing Tower In Potawatomi State Park, Door County, Wisconsin, Us, Robert Ross, Xiping Wang, C. Adam Senalik
College of Forest Resources and Environmental Science Publications
The State of Wisconsin’s Department of Natural Resources is responsible for operating one of the largest state park systems in the United States. Potawatomi State Park, located on the Door County peninsula, consists of about 1,200 acres of flat to gently rolling upland terrain bordered by steep slopes and rugged limestone cliffs along Lake Michigan’s shoreline. A 75-ft observation tower sits atop a 150-ft bluff overlooking Lake Michigan. The USDA Forest Service, Forest Products Laboratory, was asked to conduct an assessment of the main support timbers of the tower. This report summarizes the results obtained from the inspection and assessment. …
The Hydrologic Role Of Urban Green Space In Mitigating Flooding (Luohe, China), Tian Bai, Audrey L. Mayer, William D. Shuster, Guohang Tian
The Hydrologic Role Of Urban Green Space In Mitigating Flooding (Luohe, China), Tian Bai, Audrey L. Mayer, William D. Shuster, Guohang Tian
College of Forest Resources and Environmental Science Publications
Even if urban catchments are adequately drained by sewer infrastructures, flooding hotspots develop where ongoing development and poor coordination among utilities conspire with land use and land cover, drainage, and rainfall. We combined spatially explicit land use/land cover data from Luohe City (central China) with soil hydrology (as measured, green space hydraulic conductivity), topography, and observed chronic flooding to analyze the relationships between spatial patterns in pervious surface and flooding. When compared to spatial–structural metrics of land use/cover where flooding was commonly observed, we found that some areas expected to remain dry (given soil and elevation characteristics) still experienced localized …
Mid-Atlantic Forest Ecosystem Vulnerability Assessment And Synthesis: A Report From The Mid-Atlantic Climate Change Response Framework Project, Patricia Leopold, Louis Iverson, Frank R. Thompson Iii, Leslie A. Brandt, Stephen D. Handler, Danielle Shannon, Matt Kelly, Et. Al.
Mid-Atlantic Forest Ecosystem Vulnerability Assessment And Synthesis: A Report From The Mid-Atlantic Climate Change Response Framework Project, Patricia Leopold, Louis Iverson, Frank R. Thompson Iii, Leslie A. Brandt, Stephen D. Handler, Danielle Shannon, Matt Kelly, Et. Al.
College of Forest Resources and Environmental Science Publications
Forest ecosystems will be affected directly and indirectly by a changing climate over the 21st century. This assessment evaluates the vulnerability of 11 forest ecosystems in the Mid-Atlantic region (Pennsylvania, New Jersey, Delaware, eastern Maryland, and southern New York) under a range of future climates. We synthesized and summarized information on the contemporary landscape, provided information on past climate trends, and described a range of projected future climates. This information was used to parameterize and run multiple forest impact models, which provided a range of potential tree responses to climate. Finally, we brought these results before two multidisciplinary panels of …