Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Effects of climate warming on growth and morphological characteristics of Centaurea maculosa from different regions.

Abstract

Infrared simulation warming is used to investigate the effect on Centaurea maculosa's growth and morphological characteristics under the conditions of warming 2°C (overground 10 cm). The C. maculosa seeds came from different regions in North America and Europe. The results indicated that the temperature increase may impact the plant height, leaf number, and leaf area, shoot biomass, root biomass, root-top ratio of C. maculosa from different regions. It can promote or restrain these processes in a certain extent. Comparing to other situations, the temperature increase made Arkansas, Ukraine and Canada C. maculosa's plant height increase significantly. Warming also made Maryland C. maculosa's plant height decrease significantly. The total leaf number increased 1-5, but the leaf number of Ukraine, Maryland did not increase. The leaf morphological properties became smaller. At the same time, the total leaf area of Canada C. maculosa increased obviously, while Vermont group decreased significantly. Montana C. maculosa's shoot biomass increased by warming, whereas Romania group was significantly reduced. For root biomass, Ukraine, Romania, Vermont C. maculosa reduced obviously. The warming made Ukraine, Montana, Maryland and Vermont C. maculosa's root-top ratio decreased obviously in this condition. Their response orders (from promote to restrain) are: Arkanses group, Canada group, Montana group, Ukraine group, Vermont group, Maryland group, Romania group. It indicated that C. maculosa from different regions have different adaptabilities under warming condition, the differences reflect in the C. maculosa's growth and morphologies. As invasive species, the invasiveness are also different under the environment of global warming.