Show simple item record

dc.contributor.supervisor Tenuta, Mario en
dc.contributor.author Lumactud, Rhea Amor
dc.date.accessioned 2010-04-07T17:21:33Z
dc.date.available 2010-04-07T17:21:33Z
dc.date.issued 2010-04-07T17:21:33Z
dc.identifier.uri http://hdl.handle.net/1993/3901
dc.description.abstract The tundra ecosystem, with its frost-molded landscape and large peat reserves, is vulnerable to climate change. Thus, any increase in temperature due to global warming will cause changes in above-and belowground biota. Understanding the linkage between these biotas will help make prediction of the biodiversity and ecosystem functioning when global change phenomena occur, and consequently aid in making management strategies. The role of nematodes in nutrient cycling and decomposition, among many other attributes, make them useful organisms to study soil processes. Associations between plant and nematode communities, from six sites (Berm Face, Berm Crest, Tundra Heath, Polygon, Hummock and Forest) and from within a young, visually homogeneous tundra heath field site, were examined in the subarctic environment of Churchill, Manitoba. The study also provided nematofaunal information, which is very limited in this region. Multivariate analyses of nematode taxa abundance revealed four distinct groupings: Berm Face, Berm Crest, heaths (Tundra Heath, Polygon and Hummock) and Forest. The result showed a parallel relationship between nematode and vegetation assemblages, and thus, a seeming interdependency between above-ground and below-ground biota. Conversely, association between nematode and plant assemblages within a visually homogeneous tundra site was not as obvious. At this fine scale, the heterogeneous nature of edaphic factors and not plant assemblages is hypothesized to influence within-site nematode communities. The thesis also provided results to improve nematofaunal analysis to enhance their utility as bioindicators of soil food webs. en
dc.format.extent 736748 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject sub-arctic nematodes en
dc.subject soil food web en
dc.subject soil nematodes en
dc.subject above- and below- ground feedback en
dc.title Spatial distribution of soil nematodes in the sub-arctic environment of Churchill, Manitoba en
dc.type info:eu-repo/semantics/masterThesis
dc.degree.discipline Soil Science en
dc.contributor.examiningcommittee McGonigle, Terence (Biology, Brandon University) Markham, John (Biological Sciences) en
dc.degree.level Master of Science (M.Sc.) en
dc.description.note May 2010 en


Files in this item

This item appears in the following Collection(s)

Show simple item record

View Statistics