Chin J Plant Ecol ›› 2012, Vol. 36 ›› Issue (12): 1248-1255.DOI: 10.3724/SP.J.1258.2012.01248
Special Issue: 青藏高原植物生态学:群落生态学; 生物多样性
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YUAN Zi-Qiang, WEI Pan-Pan, GAO Ben-Qiang, ZHANG Rong*()
Received:
2012-08-09
Accepted:
2012-10-07
Online:
2012-08-09
Published:
2012-11-28
Contact:
ZHANG Rong
YUAN Zi-Qiang, WEI Pan-Pan, GAO Ben-Qiang, ZHANG Rong. Effect of sampling scale on the relationship between species diversity and productivity in subalpine meadows[J]. Chin J Plant Ecol, 2012, 36(12): 1248-1255.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2012.01248
变异来源 Source of variation | 自由度 df | 物种数 Number of species | 地上生物量 Aboveground biomass | |||||
---|---|---|---|---|---|---|---|---|
方差 Mean square | F | p | 方差 Mean square | F | p | |||
样地 Sampling site (SS) | 2 | 766.386 | 116.170 | 0.000 | 25.535 | 209.714 | 0.000 | |
取样面积 Sampling area (SA) | 3 | 3 126.796 | 473.963 | 0.000 | 0.113 | 0.926 | 0.428 | |
样地×取样面积 (SS × SA) | 6 | 100.749 | 15.272 | 0.000 | 0.123 | 1.014 | 0.416 | |
误差 Error | 348 | 6.597 | 0.122 |
Table 1 ANOVA for effects of sampling site and sampling area on number of species and aboveground biomass
变异来源 Source of variation | 自由度 df | 物种数 Number of species | 地上生物量 Aboveground biomass | |||||
---|---|---|---|---|---|---|---|---|
方差 Mean square | F | p | 方差 Mean square | F | p | |||
样地 Sampling site (SS) | 2 | 766.386 | 116.170 | 0.000 | 25.535 | 209.714 | 0.000 | |
取样面积 Sampling area (SA) | 3 | 3 126.796 | 473.963 | 0.000 | 0.113 | 0.926 | 0.428 | |
样地×取样面积 (SS × SA) | 6 | 100.749 | 15.272 | 0.000 | 0.123 | 1.014 | 0.416 | |
误差 Error | 348 | 6.597 | 0.122 |
样地 Sampling site | 取样面积 Sampling area | N | 线性模型 Linear model | 二次模型 Quadratic model | 模式 Pattern | ||||
---|---|---|---|---|---|---|---|---|---|
R2 | p | R2 | p | ||||||
I | 10 cm × 10 cm | 30 | 0.003 | 0.780 | 0.043 | 0.551 | ns ( | ||
20 cm × 20 cm | 30 | 0.039 | 0.294 | 0.046 | 0.527 | ns ( | |||
40 cm × 40 cm | 30 | 0.023 | 0.419 | 0.046 | 0.532 | ns ( | |||
80 cm × 80 cm | 30 | 0.013 | 0.556 | 0.078 | 0.328 | ns ( | |||
II | 10 cm × 10 cm | 30 | 0.014 | 0.532 | 0.020 | 0.762 | ns ( | ||
20 cm × 20 cm | 30 | 0.043 | 0.271 | 0.043 | 0.551 | ns ( | |||
40 cm × 40 cm | 30 | 0.002 | 0.800 | 0.019 | 0.772 | ns ( | |||
80 cm × 80 cm | 30 | 0.043 | 0.272 | 0.074 | 0.355 | ns ( | |||
III | 10 cm × 10 cm | 30 | 0.172 | 0.023 | 0.241 | 0.024 | 正线性和二次 Positive linear and quadratic ( | ||
20 cm × 20 cm | 30 | 0.064 | 0.177 | 0.091 | 0.246 | ns ( | |||
40 cm × 40 cm | 30 | 0.096 | 0.096 | 0.228 | 0.030 | 二次 ( | |||
80 cm × 80 cm | 30 | 0.003 | 0.785 | 0.003 | 0.959 | ns ( | |||
IV | 10 cm × 10 cm | 120 | 0.012 | 0.306 | 0.015 | 0.359 | ns ( | ||
20 cm × 20 cm | 120 | 0.097 | 0.026 | 0.097 | 0.012 | 正线性和二次 Positive linear and quadratic ( | |||
40 cm × 40 cm | 120 | 0.132 | 0.000 | 0.159 | 0.001 | 正线性和二次 Positive linear and quadratic ( | |||
80 cm × 80 cm | 120 | 0.048 | 0.038 | 0.048 | 0.116 | 正线性 Positive linear ( |
Table 2 Linear and quadratic regression analysis between number of species and aboveground biomass in different sampling areas
样地 Sampling site | 取样面积 Sampling area | N | 线性模型 Linear model | 二次模型 Quadratic model | 模式 Pattern | ||||
---|---|---|---|---|---|---|---|---|---|
R2 | p | R2 | p | ||||||
I | 10 cm × 10 cm | 30 | 0.003 | 0.780 | 0.043 | 0.551 | ns ( | ||
20 cm × 20 cm | 30 | 0.039 | 0.294 | 0.046 | 0.527 | ns ( | |||
40 cm × 40 cm | 30 | 0.023 | 0.419 | 0.046 | 0.532 | ns ( | |||
80 cm × 80 cm | 30 | 0.013 | 0.556 | 0.078 | 0.328 | ns ( | |||
II | 10 cm × 10 cm | 30 | 0.014 | 0.532 | 0.020 | 0.762 | ns ( | ||
20 cm × 20 cm | 30 | 0.043 | 0.271 | 0.043 | 0.551 | ns ( | |||
40 cm × 40 cm | 30 | 0.002 | 0.800 | 0.019 | 0.772 | ns ( | |||
80 cm × 80 cm | 30 | 0.043 | 0.272 | 0.074 | 0.355 | ns ( | |||
III | 10 cm × 10 cm | 30 | 0.172 | 0.023 | 0.241 | 0.024 | 正线性和二次 Positive linear and quadratic ( | ||
20 cm × 20 cm | 30 | 0.064 | 0.177 | 0.091 | 0.246 | ns ( | |||
40 cm × 40 cm | 30 | 0.096 | 0.096 | 0.228 | 0.030 | 二次 ( | |||
80 cm × 80 cm | 30 | 0.003 | 0.785 | 0.003 | 0.959 | ns ( | |||
IV | 10 cm × 10 cm | 120 | 0.012 | 0.306 | 0.015 | 0.359 | ns ( | ||
20 cm × 20 cm | 120 | 0.097 | 0.026 | 0.097 | 0.012 | 正线性和二次 Positive linear and quadratic ( | |||
40 cm × 40 cm | 120 | 0.132 | 0.000 | 0.159 | 0.001 | 正线性和二次 Positive linear and quadratic ( | |||
80 cm × 80 cm | 120 | 0.048 | 0.038 | 0.048 | 0.116 | 正线性 Positive linear ( |
Fig. 2 Linear and quadratic regression relationships between number of species and aboveground biomass (A-L, n = 30; M-P, n = 120). Circles indicate sampling quadrates; regression lines indicate significant regression relationships between number of species and aboveground biomass. I, II, III, quadrat data at sites I, II and III; IV, quadrat data by summing-up the same sampling area at sites I, II and III.
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