|Appears in Collections:||Biological and Environmental Sciences Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Testing mechanistic models of seed dispersal for the invasive Rhododendron ponticum (L.)|
|Authors:||Stephenson, Catriona M|
Travis, Justin M
Invasive alien species
|Citation:||Stephenson CM, Kohn D, Park K, Atkinson R, Edwards C & Travis JM (2007) Testing mechanistic models of seed dispersal for the invasive Rhododendron ponticum (L.), Perspectives in Plant Ecology Evolution and Systematics, 9 (1), pp. 15-28.|
|Abstract:||Rhododendron ponticum (Ericaceae) is a serious invasive alien plant in the British Isles and is of considerable conservation and economic concern. While optimal control strategies for single individuals and small stands of R. ponticum are well described, effective regional control of the plant demands an improved understanding of its spatial dynamics, in particular its dispersal ecology. Here, we describe the results of two field experiments designed to quantify the dispersal pattern of R. ponticum seeds: (1) controlled release over a few seconds at known windspeeds and (2) natural release over the peak dispersal period. We then use these results to assess the potential use of two different mechanistic wind dispersal models (WlNDISPER and WALD) as descriptors of seed dispersal ecology for this species. Results from both the controlled and natural release experiments indicate that in open landscapes the vast majority of R. ponticum seeds travel less than 10m, but that a very small proportion (0.001% in controlled trials; 0.02% in natural release) travel more than 50m. The WINDISPER model provided the best description of seed dispersal for the controlled releases that took place over a few seconds under known windspeeds, but neither model performed well when used to predict seed dispersal from a natural stand over the peak period of dispersal. We suggest that this is due to a lack of knowledge of the exact windspeed at the time of seed release and the poor spatial and temporal resolution of the wind data available to us. The development of mechanistic wind dispersal models offers great potential for helping develop efficient control programmes for invasive alien plants, but further work to investigate the conditions under which seeds are released and the appropriate spatial and temporal resolution of wind data to use is required.|
|Rights:||The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.|
|PPEES 2007.pdf||317.09 kB||Adobe PDF||Under Embargo until 31/12/2999 Request a copy|
Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.
This item is protected by original copyright
Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
If you believe that any material held in STORRE infringes copyright, please contact firstname.lastname@example.org providing details and we will remove the Work from public display in STORRE and investigate your claim.