Journal ArticleDOI
Testing mechanistic models of seed dispersal for the invasive Rhododendron ponticum (L.)
Catriona M. Stephenson,Catriona M. Stephenson,D. D. Kohn,D. D. Kohn,Kirsty J. Park,Rachel J. Atkinson,Colin Edwards,Justin M. J. Travis +7 more
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TLDR
Results from both the controlled and natural release experiments indicate that in open landscapes the vast majority of R. ponticum seeds travel less than 10 m, but that a very small proportion travel more than 50 m, and the development of mechanistic wind dispersal models offers great potential for helping develop efficient control programmes for invasive alien plants.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 (WINDISPER 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 10 m, but that a very small proportion (0001% in controlled trials; 002% in natural release) travel more than 50 m 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 requiredread more
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Journal ArticleDOI
Mechanistic models of seed dispersal by wind
Ran Nathan,Gabriel G. Katul,Gabriel G. Katul,Gil Bohrer,Anna Kuparinen,Merel B. Soons,Sally E. Thompson,Ana Trakhtenbrot,Henry S. Horn +8 more
TL;DR: In this paper, various mechanistic models have been developed to estimate the magnitude of seed dispersal by wind, and to elucidate the relative importance of physical and biological factors affecting this passive transport process.
Journal ArticleDOI
Using dynamic vegetation models to simulate plant range shifts
Rebecca S. Snell,Andreas Huth,Julia E. M. S. Nabel,Julia E. M. S. Nabel,Greta Bocedi,Justin M. J. Travis,Dominique Gravel,Harald Bugmann,Alvaro G. Gutiérrez,Thomas Hickler,Steven I. Higgins,Björn Reineking,Marc Scherstjanoi,Natalie Zurbriggen,Heike Lischke +14 more
TL;DR: The case is made that dynamic vegetation models should be used for studying species range dynamics explicitly and can improve the understanding of the factors that influence species range expansions and contractions.
Journal ArticleDOI
Modelling spread of British wind‐dispersed plants under future wind speeds in a changing climate
James M. Bullock,Steven M. White,Christel Prudhomme,Christine Tansey,Ramón Perea,Danny A. P. Hooftman +5 more
TL;DR: Climate change may affect plant dispersal ability by decreasing the dispersal distances of wind-dispersed plants and thus their potential spread rates, and illustrates that uncertainty in climate models leads to an even greater uncertainty about how dispersal and spread will change in future climates.
Journal ArticleDOI
Global patterns of Rhododendron diversity: The role of evolutionary time and diversification rates
Nawal Shrestha,Zhiheng Wang,Xiangyan Su,Xiaoting Xu,Lisha Lyu,Yunpeng Liu,Dimitar Dimitrov,Jonathan D. Kennedy,Qinggang Wang,Zhiyao Tang,Xiaojuan Feng +10 more
TL;DR: This poster presents a probabilistic procedure for estimating the intensity and direction of emplacing carbon dioxide in the stratosphere by analysing the response of the Northern Lights to climate change.
Journal ArticleDOI
Towards a mechanistic understanding of dispersal evolution in plants: conservation implications
TL;DR: A continuous-space, individual-based model for wind-dispersed plants where release height is determined by an individual’s ‘genotype’ is introduced and it is confirmed that, when habitat is fragmented, both evolutionary rescue and evolutionary suicide remain possible outcomes when a mechanistic dispersal model is used.
References
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