Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 49 for “"Soil microbial community"”.
-
Soil microbial community dynamics associated with agricultural crops
… that occur between agricultural crops and microbial communities that reside in the soil. Soil microbes regulate the decomposition of organic matter, the cycling of nutrients to crops and can induce systemic resistance. They also drive global biogeochemical cycles that influence the climate, …
-
Soil Microbial Community Dynamics In Florida Scrub Ecosystem
… the short- and long-term fire effects on the soil microbial community. Fire effects were studied in a chronosequence, comprising a recently burned scrub during a winter-prescribed fire to scrub where fire did not occur for 40 years. The number of culturable cells was reduced by two orders of …
-
Evaluation of Nitrogenase Genes as Markers in Soil Microbial Community Studies
… of nodule-forming frankiae was assessed in soils from 5 continents, and in natural populations in root nodules of alder trees growing on 3 different mountain tops in central and southern Arizona. Specific difficulties in the development of molecular tools in these two systems were discussed. …
-
Soil Microbial Community Response to Human Decomposition in Michigan's Upper Peninsula
… conditions, with predictable patterns in microbial succession offering potential for postmortem interval (PMI) estimation. This study examines the soil microbiome associated with human decomposition at the Forensic Research Outdoor Station (FROST) in Marquette, Michigan – a unique …
-
Feedback by the soil microbial community on the distribution of two weeds
Soil microbial communities may influence the composition and species abundance of plant communities through the phenomenon of “soil feedback,” which is the tendency of a plant species to cause physical, chemical and/or biological changes in the soil that are beneficial or detrimental to its own …
-
Soil Microbial Community Distributions And Disease Suppressiveness In The Coastal Plain Of Georgia
<p>This study compared the soil microbial communities of three vegetation types in the coastal plain of Georgia: 1. crop land actively in use for agricultural production, 2. transitional grassland in early stages of secondary succession, and 3. pristine unmanaged forest land. Microbial species …
-
The effects of invasive European Buckthorn (Rhamnus cathartica) on soil microbial community composition
… woodlands suggest that buckthorn might increase soil nitrogen and carbon by stimulating rapid decomposition of litter. Because decomposition and nitrogen cycling are microbial processes, I hypothesize that buckthorn invasion changes the community composition of soil microbes, and these changes …
-
Soil microbial community dynamics in response to cover crop implementation and P fertilizer management
Soil microorganisms facilitate nutrient cycling within soils providing a critical component of soil health and serve a key role in maintaining productive agricultural systems. There are many ways to assess soil health and how soil systems respond to agricultural management practices. Some of these …
-
Degradation and vulnerability of Mediterranean Soils to Drought: Role of the soil microbial Community
La región mediterránea es una de las zonas de mayor vulnerabilidad frente al cambio climático, donde se espera un incremento en la frecuencia y duración de episodios de olas de calor y sequía. Por ello, es de vital importancia conocer el impacto que la reducción de las precipitaciones tendrá sobre …
-
Soil microbial community structure and function along environmental gradients: implications for wetland nitrogen cycling
Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:27Z
-
The Effects of dairy cattle antibiotics on soil microbial community cycling and antibiotic resistance
… to increase resistance to antibiotics in soil microbial communities since 40-95% of an antibiotic dose administered to livestock is excreted intact or as metabolites. Exposure to antibiotics is also known to alter microbial community composition, biomass, and physiology, but the potential …
-
Patterns in forest soil microbial community composition across a range of regional climates in Western Canada
Soil microbial communities can be characterized by community structure and function (community composition) across a spectrum of spatial scales, and variation in soil microbial composition has been associated with a number of environmental gradients. This study investigates the structure and …
-
Assessing restoration potential in relict wetland soils: investigating the effect of wetland hydrology on soil microbial community composition and denitrification potential
Microbial communities are known to strongly influence rates of biogeochemical cycling in wetland ecosystems; specifically, they are strong determinants of rates of denitrification typically observed. Human induced land use changes have significantly reduced the acreage of wetland habitats, with dam …
-
Soil microbial community structure and function of agriculturally used Mollisols in the periurban area around Buenos Aires, Argentina, with emphasis on pesticide and heavy metal contamination
… agriculture and the maintenance of sustainable soil fertility are of essential importance. However, the population is increasingly concerned about an environmental contamination because of an enhanced application of pesticides and heavy metal containing fertilisers in the course of which organic …
-
Catechin, a novel root exudate of Centaurea stoebe, exhibits pleiotropic effects on the soil microbial community and individual soil isolates, and undergoes chemical changes with numerous abiotic factors from soil
… many studies ignore the impact of catechin on microbial populations in soil. Understanding the impact of catechin on microbial processes will greatly aid our understanding of how spotted knapweed invasion can alter soil chemistry and biological processes. Chapter 2 will address the impact of …
-
Catechin, a novel root exudate of Centaurea stoebe, exhibits pleiotropic effects on the soil microbial community and individual soil isolates, and undergoes chemical changes with numerous abiotic factors from soil
… many studies ignore the impact of catechin on microbial populations in soil. Understanding the impact of catechin on microbial processes will greatly aid our understanding of how spotted knapweed invasion can alter soil chemistry and biological processes. Chapter 2 will address the impact of …
-
Targeted short-term nutrient reduction to manage Ventenata dubia an invasive winter annual grass: soil and plant responses
… also reduce native plant diversity and harm the soil microbiome. These effects require additional measures to be taken, like reseeding, and plant diversity is still usually well below remnant targets. Early season short-term nutrient reduction to manage IWAGs is largely unexplored and would …
-
Microbial Regulation of Soil Greenhouse Gas Emissions in a Non-Bloat Legume Grazing System
… dioxide (CO2), and nitrous oxide (N2O) from microbial respiration of soil carbon (C) and nitrogen (N). Producers may introduce non-bloat legumes to cattle pastures to improve soil N content, increase cattle protein uptake, and decrease enteric methane emissions. However, such land management …
-
Using bio-manipulation to optimise nutrient management within intensive farm systems
… on many of the key physico-chemical and microbial properties of agricultural soils. This uncertainty reduces the likelihood that land owners and land managers will adjust farming practices in order to deliver more widespread use of organic amendments to support production. In this …
-
Soil and compost tea: A new restoration technique?
… practices focus on reestablishing the plant community but overlook the soil microbial community even though microbes are critical to habitat functioning. Developing techniques that increase soil microbes in prairie restorations is critical to ensuring diverse restored habitats. We compared …
Page 1 of 3