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dc.contributor.advisorChairperson, Graduate Committee: Jamie Shermanen
dc.contributor.authorBurkhardt, Andyen
dc.contributor.otherShabeg S. Briar, John M. Martin, Patrick M. Carr, Jennifer Lachowiec, Cathy Zabinski, David W. Roberts, Perry Miller and Jamie Sherman were co-authors of the article, 'Perennial crop legacy effects on nematode community structure in semi-arid wheat systems' in the journal 'Applied soil ecology' which is contained within this thesis.en
dc.contributor.otherShabeg S. Briar, John M. Martin, Patrick M. Carr and Jamie Sherman were co-authors of the article, 'Characterization of soil nematode community structure in semi-arid dryland barley (Hordeum vulgare L.) systems' which is contained within this thesis.en
dc.date.accessioned2019-05-24T15:16:18Z
dc.date.available2019-05-24T15:16:18Z
dc.date.issued2019en
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/15141en
dc.description.abstractNematodes as a taxonomic phylum are incredibly diverse and play an important role in soil biology, nutrient cycling, and soil food web function. Nematodes can be categorized into five major trophic groups including bacterivores, fungivores, herbivores, predators, and omnivores. Plant-parasitic nematodes (PPNs) affect soil food web resources through direct herbivory, while free-living (non-pathogenic) bacterivores and fungivores graze on microbes and contribute significantly to soil nutrient pools. Predatory nematodes regulate the soil food web by preying on other nematodes and invertebrates in the soil. An unbalanced soil food web community can lead to unintended impacts to other species and create a cascading effect. In agriculture, this impact can lead to low crop production and reduced revenue by means of soil ecological degradation. The goal of this project was to elucidate the nematode community structure changes under different management strategies in both agricultural and range settings. The hypotheses we tested were 1) that crop rotations eliminating fallow would positively and significantly impact the soil nematode community that would in turn self-regulate the PPN population and 2) native sagebrush steppe would have a more diverse nematode community than converted sagebrush steppe managed for livestock grazing or other uses. We did so with the following studies: 1. Quantitatively assessed nematode community structure under barley monoculture and barley-fallow vs. barley-pea rotations using multiple ecological measures and indices and correlated those measures and indices with soil chemical and physical properties as well as agronomic parameters of each system. 2. Quantitatively assessed nematode community structure under wheat-tilled fallow, wheat-no-till fallow, and no-till wheat monoculture vs. several no-till wheat-pulse rotations using multiple ecological measures and indices to evaluate long term impacts of cropping system to the nematode community. 3. Quantified taxonomic diversity and ecological indices of disturbed and undisturbed sagebrush steppe in the Bangtail Mountains west of Wilsall, Montana to evaluate disturbance regimes in a reclaimed environment.en
dc.language.isoenen
dc.publisherMontana State University - Bozeman, College of Agricultureen
dc.subject.lcshNematodesen
dc.subject.lcshSoilsen
dc.subject.lcshCrop rotationen
dc.subject.lcshSagebrushen
dc.subject.lcshBarleyen
dc.subject.lcshWheaten
dc.titleElucidating the effect of anthropogenic land management on soil nematode community structureen
dc.typeDissertationen
dc.rights.holderCopyright 2018 by Andrew Patrick Burkhardten
thesis.degree.committeemembersMembers, Graduate Committee: Patrick M. Carr; Jack Martin; Shabeg S. Briar.en
thesis.degree.departmentPlant Sciences & Plant Pathology.en
thesis.degree.genreDissertationen
thesis.degree.namePhDen
thesis.format.extentfirstpage1en
thesis.format.extentlastpage136en
mus.relation.departmentPlant Sciences & Plant Pathology.en_US
mus.data.thumbpage117en


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