Relationship between herbaceous plant invasion and soil properties in the Changbai Mountain Tundra

Invasion by Cenchrus spinifex changes the soil microbial community structure in a sandy grassland ecosystem

“…Analysis of soil physicochemical properties showed that Cenchrus spinifex invasion significantly decreased TN content ( P < 0.05) ( Table 1 ). Plant invasion could alter factors such as soil chemical properties and soil moisture conditions, which may affect the adsorption, desorption, fixation, and release of nitrogen in the soil, thereby affecting the content and utilization efficiency of total nitrogen in the soil [ 41 ]. In this study, Cenchrus spinifex intrusion significantly increased the AN content ( P < 0.05).…”

“…4 ; Table 2 ). This means that the main behavior of the bacteria in Cenchrus spinifex -invaded soil should be competitive interaction, while the main behavior of the fungi would be cooperative interaction to adapt to environmental changes [ 65 ], which indicated that bacterial communities have a strong resistance to invasion. Some scholars have reported that there is no significant difference in the alpha diversity of bacterial and fungal communities with the intensification of the invasion by Deyeuxia angustifolia [ 65 ], which was consistent with the results obtained in this study during the vegetative and reproductive growth periods.…”

“…This means that the main behavior of the bacteria in Cenchrus spinifex -invaded soil should be competitive interaction, while the main behavior of the fungi would be cooperative interaction to adapt to environmental changes [ 65 ], which indicated that bacterial communities have a strong resistance to invasion. Some scholars have reported that there is no significant difference in the alpha diversity of bacterial and fungal communities with the intensification of the invasion by Deyeuxia angustifolia [ 65 ], which was consistent with the results obtained in this study during the vegetative and reproductive growth periods. However, the results of the principal component analysis of bacterial and fungal communities showed that the invasion by Cenchrus spinifex significantly affected the composition of soil bacterial community structure ( P < 0.05), though had no significant impact on fungal communities ( Fig.…”