Yi TANG1,*, Carlos Alberto BUSSO2
BIOCELL, Vol.42, No.2, pp. 61-66, 2018, DOI:10.32604/biocell.2018.07015
Abstract Elm (Ulmus pumila L.) is the dominant tree species in the sparse elm woodland, the original vegetation
in the Horqin Sandy Land. The effects of changes in precipitation on U. pumila trees have not been fully studied. We
determined a dynamic model by considering the five stages in the U. pumila life cycle, i.e. seed, seedling, and juvenile,
mature and over-mature tree stages. The effects of changes in precipitation on population density and age structure
were then evaluated. Population density, after averaging all study developmental morphology stages, ranged from
16.67 individuals/m2
to 25.01 individuals/m2
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