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Tree Populations on the Islands of the Lower Chippewa River in Wisconsin

William J. Barnes
Bulletin of the Torrey Botanical Club
Vol. 118, No. 4 (Oct. - Dec., 1991), pp. 424-431
Published by: Torrey Botanical Society
DOI: 10.2307/2997094
Stable URL: http://www.jstor.org/stable/2997094
Page Count: 8
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Tree Populations on the Islands of the Lower Chippewa River in Wisconsin
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Abstract

The tree species occurring on 25 islands of the Chippewa River in Wisconsin were censused. The islands range in size from 0.1 to 6.4 ha and contain from as few as 3 to as many as 14 species of trees. A linear relationship was found between the number of tree species and island area. The number of species was also related to elevation but not to age, substrate type, mode of origin, or distance to the nearest floodplain forest. The number of tree species on these islands is related to area but not to the degree of isolation and is greatly influenced by elevation because of periodic flooding.

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