Modeling the growth of individuals in crowded plant populations Export

@article{citeulike:2842533, abstract = {AimsWe present an improved model for the growth of individuals in plant populations experiencing competition. MethodsIndividuals grow sigmoidally according to the Birch model, which is similar to the more commonly used Richards model, but has the advantage that initial plant growth is always exponential. The individual plant growth models are coupled so that there is a maximum total biomass for the population. The effects of size-asymmetric competition are modeled with a parameter that reflects the size advantage that larger individual have over smaller individuals. We fit the model to data on individual growth in crowded populations of Chenopodium album. Important FindingsWhen individual plant growth curves were not coupled, there was a negative or no correlation between initial growth rate and final size, suggesting that competitive interactions were more important in determining final plant size than were plants' initial growth rates. The coupled growth equations fit the data better than individual, uncoupled growth models, even though the number of estimated parameters in the coupled competitive growth model was far fewer, indicating the importance of modeling competition and the degree of size-asymmetric growth explicitly. A quantitative understanding of stand development in terms of the growth of individuals, as altered by competition, is within reach. 10.1093/jpe/rtn008}, author = {Damgaard, Christian and Weiner, Jacob}, citeulike-article-id = {2842533}, citeulike-linkout-0 = {http://dx.doi.org/10.1093/jpe/rtn008}, citeulike-linkout-1 = {http://jpe.oxfordjournals.org/cgi/content/abstract/1/2/111}, day = {1}, doi = {10.1093/jpe/rtn008}, journal = {J Plant Ecol}, keywords = {birch-model, growth-curves, plant-competition, richards-model, size-asymmetric-competition}, month = {June}, number = {2}, pages = {111--116}, posted-at = {2009-07-18 02:44:43}, priority = {4}, title = {Modeling the growth of individuals in crowded plant populations}, url = {http://dx.doi.org/10.1093/jpe/rtn008}, volume = {1}, year = {2008} }

TY - JOUR ID - citeulike:2842533 L3 - citeulike-article-id:2842533 N2 - AimsWe present an improved model for the growth of individuals in plant populations experiencing competition. MethodsIndividuals grow sigmoidally according to the Birch model, which is similar to the more commonly used Richards model, but has the advantage that initial plant growth is always exponential. The individual plant growth models are coupled so that there is a maximum total biomass for the population. The effects of size-asymmetric competition are modeled with a parameter that reflects the size advantage that larger individual have over smaller individuals. We fit the model to data on individual growth in crowded populations of Chenopodium album. Important FindingsWhen individual plant growth curves were not coupled, there was a negative or no correlation between initial growth rate and final size, suggesting that competitive interactions were more important in determining final plant size than were plants' initial growth rates. The coupled growth equations fit the data better than individual, uncoupled growth models, even though the number of estimated parameters in the coupled competitive growth model was far fewer, indicating the importance of modeling competition and the degree of size-asymmetric growth explicitly. A quantitative understanding of stand development in terms of the growth of individuals, as altered by competition, is within reach. 10.1093/jpe/rtn008 IS - 2 JF - J Plant Ecol EP - 116 TI - Modeling the growth of individuals in crowded plant populations VL - 1 SP - 111 KW - birch-model KW - growth-curves KW - plant-competition KW - richards-model KW - size-asymmetric-competition AU - Damgaard, Christian AU - Weiner, Jacob PY - 2008/06/01/ UR - http://dx.doi.org/10.1093/jpe/rtn008 ER -