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Publication Type J
Authors Houle, G.
Title Interactions between resources and abiotic conditions control plant performance on subarctic coastal dunes
Source American Journal of Botany
Author Keywords Elymus mollis Honckenya peploides Lathyrus japonicus nitrogen phosphorus salt spray water availability eastern hudson-bay ammophila-breviligulata nutrient accumulation limiting nutrients primary succession mineral-nutrition growth nitrogen tundra communities
Abstract Both abiotic conditions and resource levels affect the performance of plants on coastal dune systems. On the foredune, environmental factors are particularly limiting for plant growth and these vary along a short topographical gradient, from the foot to the ridge. On subarctic coastal dunes in northeastern Canada, this topographical gradient is paralleled by a plant sequence that typically involves Honckenya peploides, Elymus mollis, and Lathyrus japonicus. In this study, held nutrient additions were carried out to evaluate the importance of N and/or P limitation on foredune plant performance. Also, glasshouse experiments were done to determine the significance of interactions between substrate resources (i.e., nutrients and water), and between substrate resources (i.e., nutrients) and an abiotic condition (i.e., salt spray) on the growth of a dune species. Field nutrient additions did not result in any significant increase in plant biomass, although nutrients were accumulated in the rhizomes of all three species present on the foredune and in the aboveground tissues of Elymus. Glasshouse experiments on Elymus showed that nutrient addition could increase plant biomass. However, water availability and salt spray interfered with nutrient use by the plants. I suggest that such interactions between resources and abiotic conditions may significantly affect plant performance and plant sequence on the foredune of coastal dune systems.
Author Address Univ Laval, Ctr Etud Nord, Quebec City, PQ G1K 7P4, Canada. Univ Laval, Dept Biol, Quebec City, PQ G1K 7P4, Canada. Houle, G (reprint author), Univ Laval, Ctr Etud Nord, Quebec City, PQ G1K 7P4, Canada.
ISSN 0002-9122
ISBN 0002-9122
29-Character Source Abbreviation Am. J. Bot.
Publication Date Dec
Year Published 1997
Volume 84
Issue 12
Beginning Page 1729-1737
Digital Object Identifier (DOI) 10.2307/2446472
Unique Article Identifier WOS:000071234000013
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