Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 7-Day Trial for You or Your Team.

Learn More →

Small differences in arrival time influence composition and productivity of plant communities

Small differences in arrival time influence composition and productivity of plant communities • ‘Who comes first’ is decisive for plant community assembly and ecosystem properties. Early arrival or faster initial development of a species leads to space occupancy both above and below ground and contributes to species success. However, regular disturbance (e.g. biomass removal) might permit later‐arriving or slower‐developing species to catch up. • Here, artificial communities of grassland species belonging to the plant functional types (PFTs) herb, grass and legume were used to test the effect of stepwise arrival (sowing) of PFTs. • Dramatic effects were found as a result of a 3 wk arrival difference on composition and above‐ground biomass that persisted over four harvests and two seasons. Priority effects, such as unequal germination time (arrival), and thus differences in community age structure, had lasting effects on PFT biomass contribution and associated ecosystem functioning. These effects were robust against above‐ground disturbance. Benefits of earlier root formation outweighed above‐ground species interaction. • Earlier space occupancy and bigger reserve pools are the likely causes. Natural populations commonly exhibit age diversity and asynchrony of development among taxa. In experiments, artificial synchrony of arrival (sowing) may thus induce assembly routes favouring faster‐establishing taxa, with consequences for ecosystem functioning (e.g. productivity). Founder effects, such as those observed here, could be even greater in communities of slow‐growing species or forests, given their longer generation time and minor disturbance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png New Phytologist Wiley

Small differences in arrival time influence composition and productivity of plant communities

Download PDF
8 pages

Loading next page...
 
/lp/wiley/small-differences-in-arrival-time-influence-composition-and-dOcFGYMnXm

References (38)

Publisher
Wiley
Copyright
Copyright © 2008 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0028-646X
eISSN
1469-8137
DOI
10.1111/j.1469-8137.2007.02287.x
pmid
18042201
Publisher site
See Article on Publisher Site

Abstract

• ‘Who comes first’ is decisive for plant community assembly and ecosystem properties. Early arrival or faster initial development of a species leads to space occupancy both above and below ground and contributes to species success. However, regular disturbance (e.g. biomass removal) might permit later‐arriving or slower‐developing species to catch up. • Here, artificial communities of grassland species belonging to the plant functional types (PFTs) herb, grass and legume were used to test the effect of stepwise arrival (sowing) of PFTs. • Dramatic effects were found as a result of a 3 wk arrival difference on composition and above‐ground biomass that persisted over four harvests and two seasons. Priority effects, such as unequal germination time (arrival), and thus differences in community age structure, had lasting effects on PFT biomass contribution and associated ecosystem functioning. These effects were robust against above‐ground disturbance. Benefits of earlier root formation outweighed above‐ground species interaction. • Earlier space occupancy and bigger reserve pools are the likely causes. Natural populations commonly exhibit age diversity and asynchrony of development among taxa. In experiments, artificial synchrony of arrival (sowing) may thus induce assembly routes favouring faster‐establishing taxa, with consequences for ecosystem functioning (e.g. productivity). Founder effects, such as those observed here, could be even greater in communities of slow‐growing species or forests, given their longer generation time and minor disturbance.

Journal

New Phytologist – Wiley

Published: Feb 1, 2008

Keywords: ; ; ; ; ;

There are no references for this article.