植物生态学报 ›› 2008, Vol. 32 ›› Issue (2): 370-378.DOI: 10.3773/j.issn.1005-264x.2008.02.014
所属专题: 青藏高原植物生态学:种群生态学
收稿日期:
2007-02-13
接受日期:
2007-06-11
出版日期:
2008-02-13
发布日期:
2008-03-30
通讯作者:
郭柯
作者简介:
* E-mail: guoke@ibcas.ac.cn室内实验和数据处理过程得到了林金星、胡玉憙、刘永康、倪健和王娟的支持,在此表示感谢
基金资助:
HU Jian-Ying1,2, GUO Ke1,*(), DONG Ming1
Received:
2007-02-13
Accepted:
2007-06-11
Online:
2008-02-13
Published:
2008-03-30
Contact:
GUO Ke
摘要:
为了揭示青藏高原高寒草原优势物种青藏苔草(Carex moorcroftii)和紫花针茅(Stipa purpurea)对高原特殊环境的适应性,该文研究了它们的叶片结构在自然环境梯度下的变化以及这些变化与生态因子之间的关系。结果表明:这两个物种叶片的大多数结构特征在各个样地间变化显著,其结构特征与环境因子间存在显著的相关关系。紫花针茅叶肉细胞大小随土壤有效K含量的增高而减小,下表皮细胞厚度和韧皮部面积随生长季云盖度的增高而增加,单一导管半径和导管平均面积随生长季月均湿度的增加而增大;青藏苔草上表皮细胞厚度随生长季月均最低温的降低而增厚,泡状细胞厚度(径向直径)随大陆度的增强而增加,上表皮细胞大小随土壤pH值的增大而增大,导管总数和韧皮部面积随土壤速效P含量的增高而增加。青藏苔草的保护组织、光合组织以及综合指标变异系数明显大于紫花针茅,仅维管组织指标变异系数小于紫花针茅。
胡建莹, 郭柯, 董鸣. 高寒草原优势种叶片结构变化与生态因子的关系. 植物生态学报, 2008, 32(2): 370-378. DOI: 10.3773/j.issn.1005-264x.2008.02.014
HU Jian-Ying, GUO Ke, DONG Ming. VARIATION OF LEAF STRUCTURE OF TWO DOMINANT SPECIES IN ALPINE GRASSLAND AND THE RELATIONSHIP BETWEEN LEAF STRUCTURE AND ECOLOGICAL FACTORS. Chinese Journal of Plant Ecology, 2008, 32(2): 370-378. DOI: 10.3773/j.issn.1005-264x.2008.02.014
样地编号 Plot code | 经度 Longitude (° E) | 纬度 Latitude (° N) | 海拔 Altitude (m) | 青藏苔草 Carex moorcroftii | 紫花针茅 Stipa purpurea |
---|---|---|---|---|---|
1 | 93.83 | 35.50 | 4 586 | √ | √ |
2 | 93.17 | 35.33 | 4 596 | √ | √ |
3 | 93.00 | 35.17 | 4 661 | √ | |
4 | 92.67 | 34.50 | 4 658 | √ | |
5 | 92.50 | 34.17 | 4 710 | √ | √ |
6 | 92.17 | 33.67 | 4 643 | √ | |
7 | 91.83 | 33.17 | 4 901 | √ | |
8 | 91.67 | 31.17 | 4 723 | √ | √ |
9 | 90.67 | 30.33 | 4 577 | √ |
表1 样地信息
Table 1 Information of the sampling plots
样地编号 Plot code | 经度 Longitude (° E) | 纬度 Latitude (° N) | 海拔 Altitude (m) | 青藏苔草 Carex moorcroftii | 紫花针茅 Stipa purpurea |
---|---|---|---|---|---|
1 | 93.83 | 35.50 | 4 586 | √ | √ |
2 | 93.17 | 35.33 | 4 596 | √ | √ |
3 | 93.00 | 35.17 | 4 661 | √ | |
4 | 92.67 | 34.50 | 4 658 | √ | |
5 | 92.50 | 34.17 | 4 710 | √ | √ |
6 | 92.17 | 33.67 | 4 643 | √ | |
7 | 91.83 | 33.17 | 4 901 | √ | |
8 | 91.67 | 31.17 | 4 723 | √ | √ |
9 | 90.67 | 30.33 | 4 577 | √ |
图1 紫花针茅的叶片横切面(×100) 1. 远轴面表皮 Abaxial epidermis 2. 近轴面表皮 Adaxial epidermis 3. 叶肉细胞 Mesophyll cells 4. 维管束 Vascular bundles
Fig.1 Transect of leaf of Stipa purpurea (×100)
图2 紫花针茅叶肉细胞与维管束(×400) 1. 气孔 Stomata 2. 近轴面表皮毛 Adaxial epidermal hair 3. 导管 Vessel 4. 维管束鞘 Vascular bundle sheath 5. 木质部 Xylem 6. 韧皮部 Phloem
Fig.2 Mesophyll cells and vascular bundle of leaf of Stipa purpurea (×400)
图3 青藏苔草叶片结构特征与气腔(×50) 1. 气腔 Air-cavities 2. 泡状细胞 Bulliform cells 3. 上表皮 Upper epidermis 4. 下表皮 Lower epidermis
Fig.3 Leaf structure and air-cavities of Carex moorcroftii (×50)
图5 青藏苔草靠近下表皮的叶肉细胞与维管束(×400) 1. 韧皮部 Phloem 2. 木质部 Xylem 3. 导管 Vessel 4. 维管束鞘 Vascular bundle sheath
Fig.5 Lower epidermal (abaxial) mesophyll cells and leaf vascular bundle of Carex moorcroftii (×400)
图6 青藏苔草靠近上表皮的叶肉细胞(×400) 箭头所示为靠近上表皮的叶肉细胞 The arrow shows upper epidermal (adaxial) mesophyll cells
Fig.6 Upper epidermal (adaxial) mesophyll cells of Carex moorcroftii (×400)
叶片结构 Leaf structures | 样地1 Plot 1 | 样地2 Plot 2 | 样地4 Plot 4 | 样地5 Plot 5 | 样地7 Plot 7 | 样地8 Plot 8 | 样地9 Plot 9 |
---|---|---|---|---|---|---|---|
LET | 17.08± 0.26b | 15.80± 0.46a | 17.07± 0.31b | 20.17± 0.36d | 16.63± 0.32ab | 16.07± 0.26ab | 18.57± 0.47c |
LCLT | 5.29± 0.15a | 5.63± 0.13ab | 5.94± 0.21bc | 7.24± 0.22d | 6.24± 0.13c | 5.71± 0.14ab | 5.96± 0.12bc |
LECS | 193.17± 7.60ab | 181.05± 11.52a | 201.12± 9.06abc | 222.29± 5.65c | 177.05± 7.46a | 197.10± 6.44abc | 219.22± 13.21bc |
LT | 76.85± 1.96ab | 75.55± 2.96ab | 78.99± 3.62ab | 89.24± 3.63c | 73.16± 2.12a | 79.97± 2.01ab | 83.05± 3.19bc |
MCL | 4.64± 0.10ab | 4.21± 0.11ab | 4.73± 0.11b | 3.96± 0.56a | 4.04± 0.04ab | 4.27± 0.12ab | 4.25± 0.12ab |
MCS | 129.98± 3.12bc | 133.40± 4.28bc | 130.31± 3.96bc | 116.39± 3.13a | 121.66± 2.94ab | 124.81± 3.90abc | 135.01± 4.86c |
SVS | 7.57± 0.22d | 6.12± 0.30a | 6.66± 0.25abc | 6.95± 0.20bcd | 6.30± 0.18ab | 6.01± 0.25a | 7.18± 0.33cd |
TVTA | 378.46± 17.33b | 271.77± 17.48a | 292.55± 22.74a | 365.35± 22.57b | 266.19± 15.33a | 247.51± 17.86a | 381.99± 42.73b |
VN | 7.00± 0.00ab | 7.14± 0.10b | 7.08± 0.14b | 7.50± 0.15c | 7.00± 0.00ab | 7.18± 0.12b | 6.75± 0.13a |
AVTA | 161.94± 13.13d | 113.51± 9.64a | 118.01± 10.07abc | 142.05± 7.69bcd | 101.79± 4.55ab | 103.76± 7.62a | 126.72± 16.09cd |
XTA | 1 577.67± 73.11b | 1 353.38± 74.87ab | 1 501.74± 107.97b | 1 520.37± 72.06b | 1 293.85± 91.90ab | 1 158.18± 76.87a | 1 507.39± 145.97b |
PTA | 1 077.10± 48.48bc | 888.11± 26.69a | 1 129.60± 66.57bc | 1 321.63± 58.25d | 969.88± 43.68ab | 876.68± 45.15a | 1 170.52± 107.28cd |
RXP | 1.48± 0.06bc | 1.52± 0.06c | 1.33± 0.06ab | 1.16± 0.05a | 1.33± 0.06ab | 1.31± 0.04ab | 1.32± 0.09ab |
表2 紫花针茅叶片结构特征比较结果(平均值±标准误差)
Table 2 Multi-comparison of leaf structures of Stipa purpurea (Mean±SE)
叶片结构 Leaf structures | 样地1 Plot 1 | 样地2 Plot 2 | 样地4 Plot 4 | 样地5 Plot 5 | 样地7 Plot 7 | 样地8 Plot 8 | 样地9 Plot 9 |
---|---|---|---|---|---|---|---|
LET | 17.08± 0.26b | 15.80± 0.46a | 17.07± 0.31b | 20.17± 0.36d | 16.63± 0.32ab | 16.07± 0.26ab | 18.57± 0.47c |
LCLT | 5.29± 0.15a | 5.63± 0.13ab | 5.94± 0.21bc | 7.24± 0.22d | 6.24± 0.13c | 5.71± 0.14ab | 5.96± 0.12bc |
LECS | 193.17± 7.60ab | 181.05± 11.52a | 201.12± 9.06abc | 222.29± 5.65c | 177.05± 7.46a | 197.10± 6.44abc | 219.22± 13.21bc |
LT | 76.85± 1.96ab | 75.55± 2.96ab | 78.99± 3.62ab | 89.24± 3.63c | 73.16± 2.12a | 79.97± 2.01ab | 83.05± 3.19bc |
MCL | 4.64± 0.10ab | 4.21± 0.11ab | 4.73± 0.11b | 3.96± 0.56a | 4.04± 0.04ab | 4.27± 0.12ab | 4.25± 0.12ab |
MCS | 129.98± 3.12bc | 133.40± 4.28bc | 130.31± 3.96bc | 116.39± 3.13a | 121.66± 2.94ab | 124.81± 3.90abc | 135.01± 4.86c |
SVS | 7.57± 0.22d | 6.12± 0.30a | 6.66± 0.25abc | 6.95± 0.20bcd | 6.30± 0.18ab | 6.01± 0.25a | 7.18± 0.33cd |
TVTA | 378.46± 17.33b | 271.77± 17.48a | 292.55± 22.74a | 365.35± 22.57b | 266.19± 15.33a | 247.51± 17.86a | 381.99± 42.73b |
VN | 7.00± 0.00ab | 7.14± 0.10b | 7.08± 0.14b | 7.50± 0.15c | 7.00± 0.00ab | 7.18± 0.12b | 6.75± 0.13a |
AVTA | 161.94± 13.13d | 113.51± 9.64a | 118.01± 10.07abc | 142.05± 7.69bcd | 101.79± 4.55ab | 103.76± 7.62a | 126.72± 16.09cd |
XTA | 1 577.67± 73.11b | 1 353.38± 74.87ab | 1 501.74± 107.97b | 1 520.37± 72.06b | 1 293.85± 91.90ab | 1 158.18± 76.87a | 1 507.39± 145.97b |
PTA | 1 077.10± 48.48bc | 888.11± 26.69a | 1 129.60± 66.57bc | 1 321.63± 58.25d | 969.88± 43.68ab | 876.68± 45.15a | 1 170.52± 107.28cd |
RXP | 1.48± 0.06bc | 1.52± 0.06c | 1.33± 0.06ab | 1.16± 0.05a | 1.33± 0.06ab | 1.31± 0.04ab | 1.32± 0.09ab |
叶片结构 Leaf structures | 样地1 Plot 1 | 样地2 Plot 2 | 样地3 Plot 3 | 样地5 Plot 5 | 样地6 Plot 6 | 样地8 Plot 8 |
---|---|---|---|---|---|---|
UET | 30.58±0.60a | 31.91±0.75a | 36.68±0.88c | 39.57±1.32d | 34.88±0.83bc | 32.22±1.04ab |
UCLT | 6.56±0.12a | 6.16±0.17a | 6.71±0.20a | 6.56±0.26a | 6.51±0.21a | 6.31±0.16a |
UECS | 563.08±21.08a | 595.30±24.71a | 764.13±39.86b | 901.38±54.04c | 666.34±24.83ab | 607.37±30.67a |
LET | 18.14±0.23b | 20.31±0.52c | 20.59±0.47c | 19.61±0.42c | 18.23±0.62b | 15.86±0.46a |
LCLT | 5.15±0.13cd | 4.78±0.18bc | 5.56±0.14d | 4.47±0.12ab | 4.98±0.17c | 4.32±0.15a |
LECS | 240.32±7.20bc | 269.37±13.12cd | 268.79±18.18cd | 292.40±14.03d | 223.17±12.31ab | 191.17±9.36a |
LEHL | 15.51±0.45b | 16.53±0.47b | 16.35±0.45b | 15.48±0.43b | 12.27±0.39a | 12.43±0.35a |
ADMCS | 277.16±34.36bc | 225.68±7.10ab | 241.60±22.89ab | 307.87±8.98c | 183.37±5.81a | 202.91±6.17a |
ABMCS | 256.49±8.84b | 259.34±6.33b | 265.51±6.28b | 334.53±9.41c | 182.76±6.94a | 200.25±6.03a |
LT | 377.26±13.23c | 332.68±8.41ab | 346.27±6.19b | 344.20±10.61b | 311.54±10.52a | 313.00±8.15a |
BCT | 48.93±2.35a | 49.28±3.92a | 49.93±3.53ab | 63.98±6.50b | 57.50±2.28ab | 54.17±4.80ab |
AA | 31 727.20± 2 209.15bc | 33 532.60± 3 143.59c | 23 639.42± 1 928.07b | 51 333.79± 3 472.13d | 13 188.64± 1 326.77a | 37 742.23± 4 069.78c |
RAL | 0.16±0.01a | 0.11±0.01a | 0.12±0.01a | 0.13±0.01a | 0.09±0.01a | 0.17±0.01a |
LTA | 201 768.63± 9 150.58a | 298 894.34± 37 032.59b | 194 754.52± 9 450.77a | 389 754.35± 28 004.42c | 156 033.31± 7 882.97a | 220 070.72± 9 377.18a |
SVS | 7.47±0.37a | 8.71±0.36bc | 8.65±0.30bc | 9.56±0.38c | 7.89±0.58ab | 8.49±0.16abc |
TVTA | 412.59±38.00a | 485.60±42.42a | 489.79±28.43a | 606.61±45.68b | 454.33±60.40a | 474.96±25.13a |
VN | 2.17±0.17a | 2.00±0.00a | 2.33±0.14a | 2.00±0.00a | 2.29±0.29a | 2.25±0.18a |
AVTA | 195.65±19.47a | 242.80±21.21a | 219.48±19.33a | 303.30±22.84b | 211.65±34.70a | 216.16±9.77a |
XTA | 1 979.95±217.04a | 2 419.88±191.07ab | 2 216.57±124.62ab | 2 714.44±145.85b | 2 132.56±276.23a | 2 293.04±126.84ab |
PTA | 1 035.84±93.93ab | 1 546.65±92.39c | 1 276.96±119.80bc | 1 355.95±40.41c | 968.35±111.45a | 1 318.93±48.45c |
RXP | 1.86±0.14ab | 1.56±0.07a | 1.58±0.11a | 2.00±0.09bc | 2.20±0.11c | 1.75±0.11ab |
表3 青藏苔草叶片结构特征比较结果(平均值±标准误差)
Table 3 Multi-comparison of leaf structures of Carex moorcroftii (Mean±SE)
叶片结构 Leaf structures | 样地1 Plot 1 | 样地2 Plot 2 | 样地3 Plot 3 | 样地5 Plot 5 | 样地6 Plot 6 | 样地8 Plot 8 |
---|---|---|---|---|---|---|
UET | 30.58±0.60a | 31.91±0.75a | 36.68±0.88c | 39.57±1.32d | 34.88±0.83bc | 32.22±1.04ab |
UCLT | 6.56±0.12a | 6.16±0.17a | 6.71±0.20a | 6.56±0.26a | 6.51±0.21a | 6.31±0.16a |
UECS | 563.08±21.08a | 595.30±24.71a | 764.13±39.86b | 901.38±54.04c | 666.34±24.83ab | 607.37±30.67a |
LET | 18.14±0.23b | 20.31±0.52c | 20.59±0.47c | 19.61±0.42c | 18.23±0.62b | 15.86±0.46a |
LCLT | 5.15±0.13cd | 4.78±0.18bc | 5.56±0.14d | 4.47±0.12ab | 4.98±0.17c | 4.32±0.15a |
LECS | 240.32±7.20bc | 269.37±13.12cd | 268.79±18.18cd | 292.40±14.03d | 223.17±12.31ab | 191.17±9.36a |
LEHL | 15.51±0.45b | 16.53±0.47b | 16.35±0.45b | 15.48±0.43b | 12.27±0.39a | 12.43±0.35a |
ADMCS | 277.16±34.36bc | 225.68±7.10ab | 241.60±22.89ab | 307.87±8.98c | 183.37±5.81a | 202.91±6.17a |
ABMCS | 256.49±8.84b | 259.34±6.33b | 265.51±6.28b | 334.53±9.41c | 182.76±6.94a | 200.25±6.03a |
LT | 377.26±13.23c | 332.68±8.41ab | 346.27±6.19b | 344.20±10.61b | 311.54±10.52a | 313.00±8.15a |
BCT | 48.93±2.35a | 49.28±3.92a | 49.93±3.53ab | 63.98±6.50b | 57.50±2.28ab | 54.17±4.80ab |
AA | 31 727.20± 2 209.15bc | 33 532.60± 3 143.59c | 23 639.42± 1 928.07b | 51 333.79± 3 472.13d | 13 188.64± 1 326.77a | 37 742.23± 4 069.78c |
RAL | 0.16±0.01a | 0.11±0.01a | 0.12±0.01a | 0.13±0.01a | 0.09±0.01a | 0.17±0.01a |
LTA | 201 768.63± 9 150.58a | 298 894.34± 37 032.59b | 194 754.52± 9 450.77a | 389 754.35± 28 004.42c | 156 033.31± 7 882.97a | 220 070.72± 9 377.18a |
SVS | 7.47±0.37a | 8.71±0.36bc | 8.65±0.30bc | 9.56±0.38c | 7.89±0.58ab | 8.49±0.16abc |
TVTA | 412.59±38.00a | 485.60±42.42a | 489.79±28.43a | 606.61±45.68b | 454.33±60.40a | 474.96±25.13a |
VN | 2.17±0.17a | 2.00±0.00a | 2.33±0.14a | 2.00±0.00a | 2.29±0.29a | 2.25±0.18a |
AVTA | 195.65±19.47a | 242.80±21.21a | 219.48±19.33a | 303.30±22.84b | 211.65±34.70a | 216.16±9.77a |
XTA | 1 979.95±217.04a | 2 419.88±191.07ab | 2 216.57±124.62ab | 2 714.44±145.85b | 2 132.56±276.23a | 2 293.04±126.84ab |
PTA | 1 035.84±93.93ab | 1 546.65±92.39c | 1 276.96±119.80bc | 1 355.95±40.41c | 968.35±111.45a | 1 318.93±48.45c |
RXP | 1.86±0.14ab | 1.56±0.07a | 1.58±0.11a | 2.00±0.09bc | 2.20±0.11c | 1.75±0.11ab |
叶片结构特征 Leaf structures | GSCC | GSH | C | SAK |
---|---|---|---|---|
MCS | -0.32 | -0.23 | -0.86* | -0.89* |
LET | 0.75* | -0.27 | 0.27 | 0.156 |
SVS | 0.58 | -0.91* | -0.091 | -0.15 |
AVTA | 0.48 | -0.78* | -0.042 | -0.01 |
PTA | 0.89* | -0.32 | 0.29 | 0.054 |
表4 紫花针茅叶结构特征与生态因子的相关性
Table 4 Correlations between leaf structures and ecological factors of Stipa purpurea
叶片结构特征 Leaf structures | GSCC | GSH | C | SAK |
---|---|---|---|---|
MCS | -0.32 | -0.23 | -0.86* | -0.89* |
LET | 0.75* | -0.27 | 0.27 | 0.156 |
SVS | 0.58 | -0.91* | -0.091 | -0.15 |
AVTA | 0.48 | -0.78* | -0.042 | -0.01 |
PTA | 0.89* | -0.32 | 0.29 | 0.054 |
叶片结构特征 Leaf structures | UET | UECS | LEHL | VN | PTA | BCT | AA |
---|---|---|---|---|---|---|---|
GSLT | -0.96* | -0.84* | -0.76 | 0.1 | -0.15 | 0.14 | 0.18 |
GST | -0.83* | -0.57 | -0.53 | 0.28 | 0.05 | 0.30 | 0.53 |
GSWS | 0.90* | 0.81 | 0.62 | -0.22 | 0.01 | 0.02 | -0.22 |
B | -0.92* | -0.7 | -0.82* | 0.01 | -0.23 | 0.46 | 0.27 |
WI | -0.93* | -0.73 | -0.81 | 0.09 | -0.16 | 0.41 | 0.28 |
AT | -0.94* | -0.78 | -0.77 | 0.17 | -0.08 | 0.28 | 0.26 |
ET | -0.89* | -0.64 | -0.80 | -0.08 | -0.32 | 0.52 | 0.27 |
C | -0.44 | -0.21 | -0.66 | -0.33 | -0.48 | 0.83* | 0.10 |
T | -0.92* | -0.79 | -0.73 | 0.25 | 0 | 0.18 | 0.25 |
CI | 0.95* | 0.82* | 0.83* | -0.12 | 0.14 | -0.28 | -0.18 |
H/A | -0.88* | -0.75 | -0.82* | 0.23 | -0.03 | 0.37 | 0.21 |
pH | 0.81* | 0.86* | 0.62 | -0.21 | -0.01 | 0.2 | 0.04 |
SAP | 0.89* | 0.67 | 0.71 | 0.94* | 0.96* | -0.23 | 0.33 |
STC | -0.89* | -0.84* | -0.84* | 0.20 | -0.06 | 0.21 | 0.06 |
SAK | -0.21 | 0.47 | 0.17 | 0.19 | 0.15 | 0.54 | 0.88* |
表5 青藏苔草叶结构特征与生态因子的相关性
Table 5 Correlations between leaf structures and ecological factors of Carex moorcroftii
叶片结构特征 Leaf structures | UET | UECS | LEHL | VN | PTA | BCT | AA |
---|---|---|---|---|---|---|---|
GSLT | -0.96* | -0.84* | -0.76 | 0.1 | -0.15 | 0.14 | 0.18 |
GST | -0.83* | -0.57 | -0.53 | 0.28 | 0.05 | 0.30 | 0.53 |
GSWS | 0.90* | 0.81 | 0.62 | -0.22 | 0.01 | 0.02 | -0.22 |
B | -0.92* | -0.7 | -0.82* | 0.01 | -0.23 | 0.46 | 0.27 |
WI | -0.93* | -0.73 | -0.81 | 0.09 | -0.16 | 0.41 | 0.28 |
AT | -0.94* | -0.78 | -0.77 | 0.17 | -0.08 | 0.28 | 0.26 |
ET | -0.89* | -0.64 | -0.80 | -0.08 | -0.32 | 0.52 | 0.27 |
C | -0.44 | -0.21 | -0.66 | -0.33 | -0.48 | 0.83* | 0.10 |
T | -0.92* | -0.79 | -0.73 | 0.25 | 0 | 0.18 | 0.25 |
CI | 0.95* | 0.82* | 0.83* | -0.12 | 0.14 | -0.28 | -0.18 |
H/A | -0.88* | -0.75 | -0.82* | 0.23 | -0.03 | 0.37 | 0.21 |
pH | 0.81* | 0.86* | 0.62 | -0.21 | -0.01 | 0.2 | 0.04 |
SAP | 0.89* | 0.67 | 0.71 | 0.94* | 0.96* | -0.23 | 0.33 |
STC | -0.89* | -0.84* | -0.84* | 0.20 | -0.06 | 0.21 | 0.06 |
SAK | -0.21 | 0.47 | 0.17 | 0.19 | 0.15 | 0.54 | 0.88* |
叶片结构特征 Leaf structures | 逐步回归 Stepwise regression | |||
---|---|---|---|---|
回归因子 Regression factors | 回归系数 Regression coefficient | R2 | p | |
MCS | SAK | -0.12 | 0.798 | 0.017 |
LET | GSCC | 0.871 | 0.57 | 0.05 |
SVS | GSH | -0.175 | 0.725 | 0.015 |
PTA | GSCC | 107.897 | 0.789 | 0.008 |
AVTA | GSH | -6.006 | 0.605 | 0.04 |
表6 紫花针茅叶结构特征对生态因子多元回归分析结果
Table 6 Stepwise multi-regression of leaf structures against ecological factors of Stipa purpurea
叶片结构特征 Leaf structures | 逐步回归 Stepwise regression | |||
---|---|---|---|---|
回归因子 Regression factors | 回归系数 Regression coefficient | R2 | p | |
MCS | SAK | -0.12 | 0.798 | 0.017 |
LET | GSCC | 0.871 | 0.57 | 0.05 |
SVS | GSH | -0.175 | 0.725 | 0.015 |
PTA | GSCC | 107.897 | 0.789 | 0.008 |
AVTA | GSH | -6.006 | 0.605 | 0.04 |
叶片结构特征 Leaf structures | 逐步回归 Stepwise regression | |||
---|---|---|---|---|
回归因子 Regression factors | 回归系数 Regression coefficient | R2 | p | |
UET | GSLT | -1.81 | 0.943 | 0.006 |
UECS | pH | 1.938 | 0.666 | 0.047 |
BCT | C | 1.436 | 0.685 | 0.042 |
VN | SAP | 144.714 | 0.884 | 0.017 |
PTA | SAP | 235 924.4 | 0.930 | 0.008 |
AA | SAK | 260.007 | 0.774 | 0.049 |
表7 青藏苔草叶结构特征对生态因子多元回归结果
Table 7 Stepwise multi-regression of leaf structure against ecological factors of Carex moorcroftii
叶片结构特征 Leaf structures | 逐步回归 Stepwise regression | |||
---|---|---|---|---|
回归因子 Regression factors | 回归系数 Regression coefficient | R2 | p | |
UET | GSLT | -1.81 | 0.943 | 0.006 |
UECS | pH | 1.938 | 0.666 | 0.047 |
BCT | C | 1.436 | 0.685 | 0.042 |
VN | SAP | 144.714 | 0.884 | 0.017 |
PTA | SAP | 235 924.4 | 0.930 | 0.008 |
AA | SAK | 260.007 | 0.774 | 0.049 |
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