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Livestock grazing in intermountain depressional wetlands-Effects on plant strategies, soil characteristics and biomass
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2013 (English)In: Agriculture, Ecosystems & Environment, ISSN 0167-8809, E-ISSN 1873-2305, Vol. 175, 21-28 p.Article in journal (Refereed) Published
Abstract [en]

Prairie wetlands are considered valuable habitat for plants, birds, and wildlife. Livestock use of these wetlands can create conflicts with conservation issues. To achieve proper management, patterns and processes induced by grazing livestock need to be understood. In this study, we examined interactions of livestock use, soil and vegetation of depressional prairie wetlands in British Columbia, Canada. Plant community composition; biomass, and soil properties (bulk density, salinity, nitrogen and carbon content) were sampled on transects in marsh and wet meadow vegetation zones of wetlands along a grazing intensity gradient. Grime's CSR-strategies were used to calibrate strategy signatures, which indicate the importance of competition, stress and disturbance. Heavily grazed sites had higher salinity, less biomass, and proportionally less belowground biomass. Differences concerning strategies between vegetation zones were only apparent in un/lightly grazed sites, where stress was higher in marsh and competition higher in wet meadow zones. Livestock use and nitrogen were positively correlated with ruderal abundance and negatively correlated with competitors and stress-tolerators. Livestock use was identified to be most influential on plant strategies. Our results indicate that heavy livestock use significantly alters vegetation patterns and processes in prairie wetlands and may have negative impact on valuable habitat. Management decisions should consider reduced livestock access and incorporate conservation issues in grazing schemes. 

Place, publisher, year, edition, pages
2013. Vol. 175, 21-28 p.
Keyword [en]
Depressional wetlands, Soil salinity, Salinification, CSR-model, Competition, Stress, Ruderals
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URN: urn:nbn:se:umu:diva-79416DOI: 10.1016/j.agee.2013.04.017ISI: 000322101200003OAI: diva2:645508
Available from: 2013-09-04 Created: 2013-08-19 Last updated: 2013-09-04Bibliographically approved

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Teuber, Laurenz
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Department of Ecology and Environmental Sciences
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