Elevated nitrogen and co-evolution history with competitors shape the invasion process of Galinsoga quadriradiata

作者：Wengang Zhang, Xing-Jiang Song, Laís Petri, Gang Liu, Xiao-Yan Chen, Ruiling Liu, Fangfang Huang, Jiabin Zou, Zhihong Zhu · 发表于：Journal of Plant Ecology · 年份：2024 · DOI：10.1093/jpe/rtae047 · 被引用次数：6 · 研究领域：Aquatic Ecosystems and Phytoplankton Dynamics

Abstract Invasive plants usually experience population differentiation as they expand from their initial invasive range to the edge. Moreover, invasive plants usually encounter competitors which shared different co-evolutionary histories with them. These factors may lead to varying responses of invasive plant populations to elevated nitrogen deposition during expansion. However, this issue has received limited attention in prior research. To address these challenges, we conducted a greenhouse experiment to investigate how population differentiation of Galinsoga quadriradiata interacts with the presence of various competitors in response to increased nitrogen deposition. Competitor types (new or old that shared short or long co-evolutionary history with the invader, respectively) were set to compete with the invasive central and edge populations under different nitrogen addition treatments. Individuals from the central population of G. quadriradiata, originating from the initial invasion range, showed greater total mass, reproduction and interspecific competitiveness compared with the edge population. Nitrogen addition improved growth and reproductive performance in both populations, and the central population had a stronger response compared with the edge population. The performance of G. quadriradiata was inhibited more effectively by old competitors than new competitors. Our results indicate that population differentiation occurs in terms of growth and competitiveness durin...