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    Marmot Disturbance Drives Trait Variations Among Five Dominant Grasses in a Mongolian Grassland

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    Author
    Sasaki, Takehiro
    Kakinuma, Kaoru
    Yoshihara, Yu
    Issue Date
    2013-07-01
    Keywords
    arid and semiarid grasslands
    disturbance
    Mongolia
    niche breadth
    soil heterogeneity
    
    Metadata
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    Citation
    Sasaki, T., Kakinuma, K., & Yoshihara, Y. (2013). Marmot disturbance drives trait variations among five dominant grasses in a Mongolian grassland. Rangeland Ecology & Management, 66(4), 487-491.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642736
    DOI
    10.2111/REM-D-12-00055.1
    Additional Links
    https://rangelands.org/
    Abstract
    We examined how disturbances by Siberian marmots (Marmota sibirica) and associated spatial heterogeneity of foraging patterns and soil properties affect trait variations in five dominant perennial grasses (including sedges) in a Mongolian grassland. Using four continuous traits (leaf height, leaf area, leaf mass per area, and root length) of each grass species, we compared species and plot mean trait values and species’ niche breadth (calculated on the basis of species’ traits) between sites with and without marmots. At sites with marmots, investment in leaves was not favored, probably because of the prevalence of foraging, with the result that plot mean values of leaf height and area were smaller than at control sites. Niche breadth values for leaf area and leaf mass per area were greater at marmot sites, probably due to the spatially heterogeneous patterns of foraging. We observed greater values of species and plot mean root length values at marmot sites. We suggest that the modification of soil physicochemical properties by marmot burrowing, defecation, and urination might enhance root growth for ensuring physical stability of plant bodies and increasing the rate of nutrient acquisition. Niche breadth value for root length was greater at marmot sites, probably due to the spatial heterogeneity of soil properties. Quantification of trait distributions among plant species may help to explain the different plant adaptive mechanisms in relation to external drivers, such as disturbance.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/REM-D-12-00055.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 66, Number 4 (July 2013)

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