Full TGIF Record # 57987
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Web URL(s):http://www.nrcresearchpress.com/doi/pdf/10.1139/b97-882
    Last checked: 09/30/2015
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Publication Type:
i
Refereed
Author(s):Wegener, Christina; Odasz, Ann Marie
Author Affiliation:Institute of Biology, University of Tromsø, N-9037 Tromsø, Norway
Title:Grazing response strategies along snow deposition gradient: a laboratory experiment on three grass species from Svalbard
Source:Canadian Journal of Botany. Vol. 75, No. 10, October 1997, p. 1685-1691.
Publishing Information:Vancouver, British Columbia: The National Research Council of Canada.
# of Pages:7
Related Web URL:http://www.nrcresearchpress.com/doi/abs/10.1139/b97-882
    Last checked: 09/30/2015
    Notes: English abstract only
Keywords:TIC Keywords: Grazing; Responses; Poa arctica; Festuca rubra; Deschampsia caespitosa; Root growth; Shoot growth; Ratios; Mowing frequency; Mowing height
Abstract/Contents:"The objective of this study was to determine whether Arctic grasses from different sites along a snow deposition gradient respond similarly to grazing. The effects of laboratory simulated grazing (two levels of clipping frequency, clipping height, and nutrition) on accumulated biomass of different plant parts and number of tillers were measured in the reindeer forage grasses Poa arctica R. Br. from a dry ridge habitat, Festuca rubra L. from a moist lee-side habitat, and Derschampsia alpina L. from a wet snowbed habitat in Svalbard. Both P. arctica and F. rubra increased the proportion of biomass allocated belowground at the cost of the aboveground structures in response to high clipping frequency combined with high clipping height, leaving total accumulated biomass unchanged. In D. alpina, on the contrary, the percentage of aboveground biomass increased at the cost of belowground structures in response to high clipping frequency and low clipping height. This results in higher vulnerability to clipping and reduced total biomass. These two contrasting response patterns may reflect differences in adaptations in the habitats. Stress tolerance is more important on wind-blown ridges and in lee-side habitats where the grazing season is longer. On the other hand, rapid growth is more important in the snowbed where the growing season is shorter. These strategies may be of great importance in regulating and driving the local foraging patterns of Svalbard reindeer."
Language:English
References:21
Note:Abstract also appears in French
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wegener, C, and A. M. Odasz. 1997. Grazing response strategies along snow deposition gradient: a laboratory experiment on three grass species from Svalbard. Can. J. Bot. 75(10):p. 1685-1691.
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http://www.nrcresearchpress.com/doi/pdf/10.1139/b97-882
    Last checked: 09/30/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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