Chin J Plant Ecol ›› 2022, Vol. 46 ›› Issue (2): 176-187.DOI: 10.17521/cjpe.2021.0397
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ZHANG Yi1,2, CHENG Jie3, SU Ji-Shuai4, CHENG Ji-Min1,2,5,*()
Received:
2021-11-04
Accepted:
2022-01-18
Online:
2022-02-20
Published:
2022-01-25
Contact:
CHENG Ji-Min
Supported by:
ZHANG Yi, CHENG Jie, SU Ji-Shuai, CHENG Ji-Min. Diversity-productivity relationship of plant communities in typical grassland during the long- term grazing exclusion succession[J]. Chin J Plant Ecol, 2022, 46(2): 176-187.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2021.0397
封育年限 GED (a) | 纬度 Latitude (° N) | 经度 Longitude (° E) | 海拔 Altitude (m) | 地上生产力 ANPP (g·m-2) | 凋落物生物量 Litter biomass (g·m-2) | 丰富度 Richness | Shannon- Wiener 指数 H′ | Pielou均匀度指数 E | Simpson优势度指数 D |
---|---|---|---|---|---|---|---|---|---|
0 | 36.22 | 106.38 | 1 942 | 115.60 ± 13.13c | 30.78 ± 8.02c | 13.33 ± 0.74a | 2.21 ± 0.05ab | 0.86 ± 0.01a | 0.85 ± 0.01a |
9 | 36.22 | 106.39 | 1 928 | 165.14 ± 10.10b | 61.66 ± 7.38bc | 12.64 ± 0.62a | 2.17 ± 0.07ab | 0.86 ± 0.01a | 0.85 ± 0.01a |
26 | 36.20 | 106.41 | 1 885 | 253.38 ± 15.32a | 160.06 ± 34.83b | 14.17 ± 0.67a | 2.30 ± 0.05a | 0.87 ± 0.01a | 0.87 ± 0.01a |
34 | 36.24 | 106.38 | 2 098 | 261.79 ± 19.87a | 346.74 ± 57.52a | 14.42 ± 0.96a | 2.11 ± 0.06b | 0.80 ± 0.01b | 0.81 ± 0.01b |
Table 1 Aboveground net primary productivity and species diversity of grassland communities after grazing exclusion (mean ± SE)
封育年限 GED (a) | 纬度 Latitude (° N) | 经度 Longitude (° E) | 海拔 Altitude (m) | 地上生产力 ANPP (g·m-2) | 凋落物生物量 Litter biomass (g·m-2) | 丰富度 Richness | Shannon- Wiener 指数 H′ | Pielou均匀度指数 E | Simpson优势度指数 D |
---|---|---|---|---|---|---|---|---|---|
0 | 36.22 | 106.38 | 1 942 | 115.60 ± 13.13c | 30.78 ± 8.02c | 13.33 ± 0.74a | 2.21 ± 0.05ab | 0.86 ± 0.01a | 0.85 ± 0.01a |
9 | 36.22 | 106.39 | 1 928 | 165.14 ± 10.10b | 61.66 ± 7.38bc | 12.64 ± 0.62a | 2.17 ± 0.07ab | 0.86 ± 0.01a | 0.85 ± 0.01a |
26 | 36.20 | 106.41 | 1 885 | 253.38 ± 15.32a | 160.06 ± 34.83b | 14.17 ± 0.67a | 2.30 ± 0.05a | 0.87 ± 0.01a | 0.87 ± 0.01a |
34 | 36.24 | 106.38 | 2 098 | 261.79 ± 19.87a | 346.74 ± 57.52a | 14.42 ± 0.96a | 2.11 ± 0.06b | 0.80 ± 0.01b | 0.81 ± 0.01b |
Fig. 1 Community weighted mean functional traits and functional diversity of grassland communities after grazing exclusion (mean ± SE). Different lowercase letters indicate significant differences (p < 0.05). FDis, functional dispersion; FEve, functional evenness; FRic, functional richness; LCC, leaf carbon concentration; LDMC, leaf dry matter content; LNC, leaf nitrogen concentration; LPC, leaf phosphorus concentration; LT, leaf thickness; SLA, specific leaf area.
Fig. 2 Relationships between aboveground net primary productivity (ANPP) and community-weighted mean functional traits in grasslands after grazing exclusion. LCC, leaf carbon concentration; LDMC, leaf dry matter content; LNC, leaf nitrogen concentration; LPC, leaf phosphorus concentration; LT, leaf thickness; SLA, specific leaf area.
Fig. 3 Relationship between aboveground net primary productivity (ANPP) and plant species diversity (A-D) and functional diversity (E-G) in grassland communities after grazing exclusion. D, Simpson dominance index; E, Pielou evenness index; FDis, functional dispersion; FEve, functional evenness; FRic, functional richness; H′, Shannon-Wiener index.
Fig. 4 Results of random forest model (A) and variance partition analysis (B) for factors influencing aboveground net primary productivity of grassland communities after grazing exclusion. *, p < 0.05; **, p < 0.0l. D, Simpson dominance index; E, Pielou evenness index; FDis, functional dispersion; FEve, functional evenness; FRic, functional richness; H′, Shannon-Wiener index; LCC, leaf carbon concentration; LDMC, leaf dry matter content; LNC, leaf nitrogen concentration; LPC, leaf phosphorus concentration; LT, leaf thickness; SLA, specific leaf area.
高度 Height | 叶片厚度 LT | 叶干物质 含量 LDMC | 比叶面积 SLA | 叶片碳含量 LCC | 叶片氮含量 LNC | 叶片磷含量 LPC | 功能丰富度 FRic | 功能均匀度 FEve | 功能离散度 FDis | |
---|---|---|---|---|---|---|---|---|---|---|
物种丰富度 Richness | 0.106 | 0.014 | -0.347* | 0.301* | -0.077 | 0.133 | 0.145 | 0.551** | 0.199 | 0.206 |
Shannon-Wiener指数 H′ | -0.232 | -0.188 | -0.233 | 0.327* | -0.145 | 0.369** | 0.347* | 0.284 | 0.294* | 0.100 |
Pielou均匀度指数 E | -0.502** | -0.280 | 0.108 | 0.082 | -0.120 | 0.416** | 0.364* | -0.243 | 0.225 | -0.094 |
Simpson优势度指数 D | -0.376** | -0.263 | -0.043 | 0.266 | -0.104 | 0.414** | 0.360* | 0.037 | 0.181 | 0.048 |
Table 2 Pearson coefficients showing the correlation of community-weighted mean functional traits to functional diversity and species diversity in grasslands after grazing exclusion
高度 Height | 叶片厚度 LT | 叶干物质 含量 LDMC | 比叶面积 SLA | 叶片碳含量 LCC | 叶片氮含量 LNC | 叶片磷含量 LPC | 功能丰富度 FRic | 功能均匀度 FEve | 功能离散度 FDis | |
---|---|---|---|---|---|---|---|---|---|---|
物种丰富度 Richness | 0.106 | 0.014 | -0.347* | 0.301* | -0.077 | 0.133 | 0.145 | 0.551** | 0.199 | 0.206 |
Shannon-Wiener指数 H′ | -0.232 | -0.188 | -0.233 | 0.327* | -0.145 | 0.369** | 0.347* | 0.284 | 0.294* | 0.100 |
Pielou均匀度指数 E | -0.502** | -0.280 | 0.108 | 0.082 | -0.120 | 0.416** | 0.364* | -0.243 | 0.225 | -0.094 |
Simpson优势度指数 D | -0.376** | -0.263 | -0.043 | 0.266 | -0.104 | 0.414** | 0.360* | 0.037 | 0.181 | 0.048 |
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