关键词: 生态位, 种间联结, 游泳动物

Abstract: Because of the unavoidable impacts of linear project construction on regional ecology, it is of significance to quantitatively research the impacts of this project construction on the soil ecological environment along the related regions and to select the potential countermeasures. In this paper, meta analysis was adopted to analyze the impacts of three kinds of linear project construction, i.e., pipeline, highway, and railway constructions on the peripheral soil ecological environment. These three project constructions had definite impacts on the soil physical and chemical properties. Their impact sizes for the soil nutrients and moisture contents were less than 1. Pipeline construction had significant impacts on soil organic matter, total and available nitrogen, and total phosphorus contents and pH value (P<0.05); highway construction decreased soil total phosphorus and moisture contents and CEC but increased soil bulk density and pH value significantly (P<0.05), and gave rise to the severe soil pollution by heavy metals Cu, Zn, Pb, Ni, Cd, Cr, and As (P<0.05); railway construction decreased soil organic matter and total nitrogen contents significantly (P<0.05) and increased the soil pollution by Cu, Zn, Pb, and Cd (P<0.05).

Key words: niche, interspecific association, nekton.