Assessing the effects of plateau pika Ochotona curzoniae disturbance on vegetation and soil in alpine meadow:insights from bibliometric and meta-analytical approaches
To clarify the impact of plateau pika Ochotona curzoniae disturbances on components of the alpine meadow ecosystem,a bibliometric analysis was conducted to identify key scientific attention points related to the effects of pika disturbance on grassland ecosystems. Plant community and soil indi-cators with high scientific attention index were selected,and a meta-analysis was employed to quantita-tively assess the impact of pika disturbance on these factors. The results showed that pika disturbances significantly reduced the height,total coverage,aboveground biomass,species diversity index,and spe-cies richness index of the plant community,with decreases of 34.52％,23.31％,23.68％,3.77％,and 1.19％,respectively. It also significantly increased the plant community's species evenness index by 0.72％. Under heavy disturbance,pika activity significantly increased total potassium content and soil pH by 19.72％and 6.18％,respectively,while significantly reducing soil moisture,total nitrogen,total phosphorus,available potassium,and organic carbon contents by 19.75％,33.63％,18.13％,18.94％,and 14.79％,respectively. In the presence of pika disturbance,the aboveground biomass was significant-ly positively correlated with soil organic carbon and total nitrogen contents,and negatively correlated with soil bulk density,total potassium content,and pH. The relationships between the indices of species diversity and soil factors were asymmetric;however,species richness and diversity indices were signifi-cantly positively correlated with total phosphorus content and significantly negatively correlated with soil bulk density. These findings suggest that intense pika disturbance exacerbates the degradation of al-pine meadows,and implementing scientific rodent control and grassland restoration measures could ef-fectively curb the ongoing degradation of these ecosystems.
万方数据
维普
