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S. Christopher Marble

grasses that previously outcompeted eastern redcedar, and other factors have led to this species becoming a troublesome weed in Oklahoma and other states ( Ansley and Rasmussen, 2005 ). Most research of plant invasions has focused on very large ecological

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Amanda J. Hershberger, Tracie M. Jenkins and Carol Robacker

insects ( Affolter, 2005 ; Rogers, 1988 ). Distribution is from eastern South Carolina to north–central and northwestern Florida, westward to southeastern Oklahoma and far eastern Texas, and north to Kentucky ( Duncan and Duncan, 2005 ; Gould, 1997

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Yunyan Sheng, Feishi Luan, Faxing Zhang and Angela R. Davis

than 200 mm per year. Recognizing the geographical distribution of watermelon lineages will benefit future watermelon genetic exchanges and provide insight into different factors that shape watermelon genetic diversity. Although watermelon is

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Kenneth W. Leonhardt

is a non-native species and 2) that its introduction “causes or is likely to cause economic or environmental harm or harm to human health” ( U.S. Department of Agriculture, n.d. ). Invasive species can spread easily and cause significant ecological

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R. Kasten Dumroese, Douglass F. Jacobs and Anthony S. Davis

has, however, an even higher ecological value because it is the principal, montane-forest tree that is critical for survival of several endemic, endangered Hawaiian bird species ( Scott et al., 1986 ). Past agronomic practices destroyed or degraded

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David A. Francko, Kenneth G. Wilson, Qingshun Q. Li and Maria A. Equiza

The severity and duration of low temperatures that cause frost or freeze damage in plant tissues and organs are important abiotic factors limiting plant distribution and horticultural economics. Commercial growers often experience periodic frost

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Yanhong Lou, Liang Chen, Qingguo Xu and Xunzhong Zhang

millions of beef cattle, horses, sheep, and countless wild animals ( Wang et al., 2001 ). Therefore, tall fescue played an important role in pastoral industry, ecological landscaping, soil conservation, and athletic industry ( Wang and Xie, 2007 ). The

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Xinyi Zhang, Li Liao, Yang Liu, Zhiyong Wang and Jianxiu Liu

and shade turf in tropical and subtropical region of China. Previous studies of C. aciculatus have mainly focused on its morphological characteristics ( Liao et al., 2011 ; Wagner et al., 1999 ). Liu et al. (1997) had investigated its distribution

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Jonathan M. Bokmeyer, Stacy A. Bonos and William A. Meyer

random model PROC MIXED (SAS Institute). All effects were considered random because locations were not chosen with respect to specific ecological properties, years were not chosen with respect to expected climatic conditions ( Gordon et al., 1972 ), and

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Martin J. Bukovac, Paolo Sabbatini, Franco Zucconi and Phillip G. Schwallier

masting, defined as intermittent production of large crops of fruit/seed by a population, in forest trees. Both have similar characteristics and have been studied extensively. In forest trees, masting has significant ecological implications on dynamics of