To clarify the characteristics of plant functional groups and the influencing factors at differ-ent successional stages of plateau zokor mounds in alpine meadows,a survey of plant reproductive modes,life forms,and root types in mounds of different ages and adjacent non-mounded grassland was conducted. The redundancy analysis was employed to explore the relationship among the species rich-ness,abundance,and biomass characteristics of plant functional groups (reproductive functional groups,life form functional groups,and root functional groups) and soil environmental factors. The results indi-cated that the plants in non-mounded grassland were predominantly reproducing via seeds with some employing vegetative reproduction,with relative abundance percentage of 58.4％and relative aboveg-round biomass percentage of 64.8％. In contrast,plants on zokor mounds primarily relied on seed repro-duction functional groups,with the highest proportions on three-year-old mounds,where their relative abundance and aboveground biomass percentages were 76.4％ and 75.5％,respectively. Life forms in non-mounded grassland were mainly ground bud and underground bud functional groups,with relative abundance percentages of 52.4％ and 39.8％ and relative aboveground biomass percentages of 47.3％and 48.5％,respectively. Whereas plants on zokor mounds,the ground bud functional group decreased while the aboveground bud functional group increased. On two-year-old mounds,underground bud plants were dominant,with relative abundance and relative aboveground biomass percentages of 68.0％and 73.6％,respectively. Plant roots in non-mounded grassland were mainly rhizome and fibrous root type functional groups,with relative abundance percentages reaching 57.7％ and 28.0％,and relative aboveground biomass percentages of 56.9％and 25.7％,respectively. On one-year and two-year-old zo-kor mounds,the dominant plants were primarily axial root and rhizome functional groups. For three-year-old mounds,the plants consist mainly of tuberous,axial root,fibrous root,and rhizome functional groups,while plants on mounds older than three years were primarily dominated by tuberous,fibrous root,and rhizome functional groups. Redundancy analysis results indicated that plateau zokor distur-bance primarily influenced the characteristics of plant functional groups in mounds by altering soil moisture and nitrogen and phosphorus nutrient availability.
plateau zokorplant functional groupsuccessionreproductive modelife formroot type
维普
万方数据
