Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Life Sciences
Soil Microbial Nitrogen-Transforming Genes Influenced By Tree Species And Fertilization In An Appalachian Hardwood Forest, Emma G. Fox-Fogle
Soil Microbial Nitrogen-Transforming Genes Influenced By Tree Species And Fertilization In An Appalachian Hardwood Forest, Emma G. Fox-Fogle
Graduate Theses, Dissertations, and Problem Reports
Many forest ecosystems have been receiving elevated nitrogen (N) deposition due to human activity. Increased ecosystem N threatens soil fertility, water and air quality, and modifies the soil microbially-mediated N cycle in complex ways. The current study investigates how the abundance of key functional N cycling genes within soil bacteria is altered by N deposition and further mediated by different dominant tree species at the Fernow Experimental Forest, WV. Soils were analyzed from two watersheds, where watershed 3 (WS 3) has been receiving experimental applications of N fertilizer that are 2x historic ambient N deposition and 5x the current ambient …
The Role Of Tree Species, The Herb Layer, And Watershed Characteristics On Nitrogen Cycling In A Central Appalachian Hardwood Forest, Sian E. Eisenhut
The Role Of Tree Species, The Herb Layer, And Watershed Characteristics On Nitrogen Cycling In A Central Appalachian Hardwood Forest, Sian E. Eisenhut
Graduate Theses, Dissertations, and Problem Reports
Little is known about the forest herbaceous layer’s contributions to nitrogen (N) cycling under varying levels of N deposition, at different stages of forest succession, in watersheds with different aspects, and under different tree species. The objectives of this study were to quantify nitrogen reductase activity (NRA) of two tree species, red maple and sugar maple, and surrounding common herb-layer species at the tissue (foliage, roots) and plot level and to assess how these species affect the concentrations of nitrate, ammonium, and organic N in soil water collected in lysimeters beneath these trees. Different watersheds located at the Fernow Experimental …