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Full-Text Articles in Life Sciences
Biological Remediation Of Fragipan, Corey Hale
Biological Remediation Of Fragipan, Corey Hale
Honors College Theses
The fragipan layer in the soil is a naturally occurring subsurface layer that restricts water percolation as well as inhibits root growth. A fragipan layer can be found almost ubiquitously across Southwestern Kentucky. This limits how agriculturalists manage soils in this area. It has been recently discovered by the University of Kentucky that Annual Ryegrass roots produce 3,4 dihydroxyphenylpropionic acid (DHPPA) that reacts with this hardpan to weaken the layer. Certain bacteria, such as Escherichia coli, Lactobacilli, and Bifidobacteria can also synthesize DHPPA through a breakdown process of chlorogenic acid. This reaction typically happens in the human digestive tract. …
Effects Of Stream Degradation On Ecosystem Function Are Mediated By Local Microbial And Macroinvertebrate Leaf Litter Processing, Carla Rothenbuecher
Effects Of Stream Degradation On Ecosystem Function Are Mediated By Local Microbial And Macroinvertebrate Leaf Litter Processing, Carla Rothenbuecher
Murray State Theses and Dissertations
Riparian areas are fundamental to aquatic ecosystems by regulating temperature and light regimes, and providing allochthonous subsidies critical to the survival of aquatic and terrestrial species. On a global scale, increased rates of anthropogenic disturbance from agricultural activities and urbanization have caused the degradation of aquatic habitats. As a result, billions of dollars have been spent on stream restoration projects to protect aquatic resources; however, fundamental ecosystem processes like litter decomposition are rarely addressed. We conducted a litterbag experiment in a degraded high desert stream proposed for large-scale restoration to test the effects of reach location, canopy cover, and temperature …