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Roadside Plant Communities on Mauna Loa, Hawaii

Lyndon Western and J. O. Juvik
Journal of Biogeography
Vol. 10, No. 4 (Jul., 1983), pp. 307-316
Published by: Wiley
DOI: 10.2307/2844740
Stable URL: http://www.jstor.org/stable/2844740
Page Count: 10
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Roadside Plant Communities on Mauna Loa, Hawaii
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Abstract

Roadside plant communities on the windward slope of Mauna Loa volcano were sampled over an altitudinal range from 500 to 2500 m, and within a zone 3 m wide along the roadway. A total of sixty-nine plant species were found to inhabit the roadside verge. Introduced plant species comprised 74% of the roadside flora. Species with temperate affinities gradually replaced those of tropical origin at elevations above 1000 m. Overall species diversity decreased with elevation. Within the roadside vegetation a distinctive zonation was found to occur with distance from the roadway. Introduced plant species were dominant on the fine-grained road-fill substrate abutting the roadway, while native plant species occupied adjacent, recent lava flow substrates. There was little spatial overlap between these distinctive communities.

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