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    • Rangeland Ecology & Management, Volume 66 (2013)
    • Rangeland Ecology & Management, Volume 66, Number 4 (July 2013)
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    Reduced Sheep Grazing and Biodiversity: A Novel Approach to Selecting and Measuring Biodiversity Indicators

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    Author
    Pollock, M. L.
    Holland, J. P.
    Morgan-Davies, C.
    Morgan-Davies, J.
    Waterhouse, A.
    Issue Date
    2013-07-01
    Keywords
    field methods
    herbivory
    joint learning
    rangelands
    stakeholder participation
    structural heterogeneity
    
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    Citation
    Pollock, M. L., Holland, J. P., Morgan-Davies, C., Morgan-Davies, J., & Waterhouse, A. (2013). Reduced sheep grazing and biodiversity: a novel approach to selecting and measuring biodiversity indicators. Rangeland Ecology & Management, 66(4), 387-400.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642725
    DOI
    10.2111/REM-D-11-00123.1
    Additional Links
    https://rangelands.org/
    Abstract
    Traditional upland livestock grazing is declining worldwide, leading to concerns about possible impacts on biodiversity. Although monitoring of protected areas often focuses on rare species, management changes also affect currently common species and vegetation structure. ‘‘Biodiversity’’ is a concept rather than a simple variable, and monitoring it requires indicators that are widely applicable and appropriate to context. This paper presents a novel knowledge-driven approach to developing a selection of biodiversity indicators that can then be rapidly and objectively measured within rangeland environments. Stakeholder and professional opinion on likely changes in biodiversity following reductions in sheep grazing was elicited using a workshop-based process. Potential variables suitable for use as biodiversity indicators were developed and professional opinion on their usefulness sought. A number of indicators were then tested in a natural experiment field study on the impact of reduced sheep grazing in Scotland. In the field study, red deer abundance appeared to increase where sheep grazing was reduced. It was therefore necessary to use estimates of both sheep and deer abundance as explanatory variables. In agreement with the professionals’ predictions, dwarf shrub abundance and vegetation height were greater where sheep grazing had been reduced, after taking into account differences in deer. In contrast to the professionals’ predictions, the field results showed rough grasses and dead material were less abundant where sheep had been reduced, with deer also having an impact on dead material. The professionals were unsure of the effects of reduced sheep grazing on vegetation mosaic structure; the field results suggested that reduced sheep grazing leads to a reduction in structural heterogeneity, but that deer had the greater impact in this case. Several other predictions showed nonsignificant differences in relation to reduced sheep grazing. The participatory method and some of the field methods presented are cost effective and widely applicable.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/REM-D-11-00123.1
    Scopus Count
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    Rangeland Ecology & Management, Volume 66, Number 4 (July 2013)

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