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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Seed production and population density decline approaching the range-edge of Cirsium species
Author(s): Jump, Alistair
Woodward, F Ian
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Keywords: Cirsium
seed production
geographical range
latitudinal gradient
population density
quantitative trait
clonal reproduction
Issue Date: Nov-2003
Date Deposited: 31-Aug-2012
Citation: Jump A & Woodward FI (2003) Seed production and population density decline approaching the range-edge of Cirsium species. New Phytologist, 160 (2), pp. 349-358.
Abstract: • Patterns in population density and abundance, community composition, seed production and morphological traits were assessed across the UK geographical range of Cirsium acaule, Cirsium heterophyllum and Cirsium arvense based on the expectation that environmental favourability declines from core to periphery of a species range. • These traits were measured in natural populations along a latitudinal transect in the UK and using botanical survey data. • A significant decline in population density and seed production occurs approaching the range edges of C. acaule and C. heterophyllum. There is no latitudinal trend in these traits in the widespread C. arvense and no latitudinal pattern to variation in morphological traits or community composition in any of these species. • Although seed production is reduced at the range edge of C. acaule and C. heterophyllum, peripheral populations of these species may persist through clonal reproduction. Low seed production may interact with reduced availability of favourable habitat to limit range expansion in these species.
DOI Link: 10.1046/j.1469-8137.2003.00873.x
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