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What are the impacts of manipulating grazing and browsing by ungulates on plants and invertebrates in temperate and boreal forests?: A systematic review protocol
Mistra Council for Evidence-Based Environmental Management, Stockholm Environment Institute, Stockholm.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Metsähallitus Parks and Wildlife Finland, Joensuu, Finland; School of Forest Sciences, University of Eastern Finland, Joensuu, Finland .
Institute of Ecology and Earth Sciences, Tartu University, Vanemuise 46, Tartu, Estonia.
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2016 (English)In: Environmental Evidence, ISSN 2047-2382, E-ISSN 2047-2382, Vol. 5, no 1, 17Article in journal (Refereed) Published
Abstract [en]

Background: Livestock grazing and 'overabundance' of large wild herbivores in forested areas have long been perceived as conflicting with the aims of both silviculture and forest conservation; however, certain kinds of herbivory can help to maintain habitat values in forest ecosystems. Management of grazing/browsing in protected forests can, therefore, be a critical tool for biodiversity conservation. However, it is not clear what impacts of wild ungulates or livestock are tolerable or desirable in forests set aside for conservation or restoration. The primary aim of the proposed systematic review is to clarify how the diversity of plants and invertebrates is affected by manipulation of the grazing/browsing pressure by livestock or wild ungulates. The ultimate purpose of the review is to investigate whether such manipulation is useful as a means of conserving or restoring biodiversity in forest set-asides. Methods: The review will examine primary field studies of how fencing or other kinds of manipulation of the grazing/browsing pressure by livestock or wild ungulates affects plants or invertebrates. We will consider studies made in boreal or temperate forests anywhere in the world, incorporating investigations made not only in protected areas but also in stands under commercial management. Non-intervention or alternative levels of grazing pressure will be used as comparators. Relevant outcomes include abundance, diversity and composition of plants and invertebrates, tree regeneration, and performance of focal/target species. Relevant studies will mainly be selected from a recent systematic map of the evidence on biodiversity impacts of active management in forest set-asides. A search update will be made with a subset of the search terms used for the systematic map. Searches for additional literature will be made in bibliographies of existing reviews. Relevant studies will be subject to critical appraisal and categorised as having high, medium or low susceptibility to bias. Studies with high susceptibility to bias will be excluded from the review. Useful outcomes and data on interventions and other potential effect modifiers will be extracted from included articles. A narrative synthesis will describe the quality and findings of all studies in the review. Where studies report similar outcomes, meta-analysis will be performed.

Place, publisher, year, edition, pages
2016. Vol. 5, no 1, 17
Keyword [en]
Biodiversity, Deer, Elk, Forest conservation, Forest reserve, Forest restoration, Forest set-aside, Herbivory, Livestock, Moose, Semi-natural habitat, Silvopastoral system, Wood-pasture
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:miun:diva-29296DOI: 10.1186/s13750-016-0070-yScopusID: 2-s2.0-84992223368OAI: oai:DiVA.org:miun-29296DiVA: diva2:1046564
Available from: 2016-11-14 Created: 2016-11-14 Last updated: 2016-11-14Bibliographically approved

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Jonsson, Bengt GunnarSandström, Jennie
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