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Growth of Alaskan Tundra Plants in Relation to Water Potential

Steve Oberbauer and Philip C. Miller
Holarctic Ecology
Vol. 5, No. 2, The Availability and Utilization of Resources in Tundra Ecosystems: Proceedings of a Workshop Held in San Diego, California 9-12 October 1978 (Apr., 1982), pp. 194-199
Published by: Wiley on behalf of Nordic Society Oikos
Stable URL: http://www.jstor.org/stable/3682457
Page Count: 6
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Growth of Alaskan Tundra Plants in Relation to Water Potential
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Abstract

The relationship of growth to plant water potential was studied in several arctic tundra species by experimentally altering the water regimes on excised tussocks, by clipping leaf area, and by clipping roots. Most species, including evergreen shrubs, showed greater growth under waterlogged conditions. The reduction of leaf area did not affect plant water potentials or growth. Root pruning decreased both plant water potentials and growth. Growth was suppressed when plant water potentials were -12 to -15 bars.

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