Biodiv Sci ›› 2008, Vol. 16 ›› Issue (3): 236-244. DOI: 10.3724/SP.J.1003.2008.07326
• Original article • Previous Articles Next Articles
Xueqin Zeng1,2,3, Luzhen Chen1,3,4,*(), Nora FungYee Tam3,5, Jianhui Huang1, Hualin Xu6, Guanghui Lin1,4
Received:
2007-10-31
Accepted:
2008-04-22
Online:
2008-05-20
Published:
2008-05-20
Contact:
Luzhen Chen
Xueqin Zeng, Luzhen Chen, Nora FungYee Tam, Jianhui Huang, Hualin Xu, Guanghui Lin. Seedling emergence and dispersal pattern of the introduced Sonneratia caseolaris in Shenzhen Bay, China[J]. Biodiv Sci, 2008, 16(3): 236-244.
Fig. 1 Location of the study site. The survey area is from A to B. The landward side of natural mangroves is occupied by Kandelia candel forest, and the seaward side is by Avicennia marina forest.
Fig. 2 Average monthly temperatures during the study period from Aug. 2006 to Sep. 2007 and average monthly temperatures of the same months from 1971-2000 in Shenzhen (data from Shenzhen Meteorological Bureau. http://www.121. com.cn)
变异来源 Sources of variation | 自由度 df | F | P |
---|---|---|---|
时间 Time | 4 | 15.828 | 0.000 |
林型 Forest type | 3 | 26.642 | 0.000 |
时间×林型 Time×Forest type | 12 | 3.455 | 0.000 |
Table 1 Repeated measures ANOVA for the seedling density of Sonneratia caseolaris in different mangrove communities
变异来源 Sources of variation | 自由度 df | F | P |
---|---|---|---|
时间 Time | 4 | 15.828 | 0.000 |
林型 Forest type | 3 | 26.642 | 0.000 |
时间×林型 Time×Forest type | 12 | 3.455 | 0.000 |
Fig. 3 Seedling density, height and coverage of Sonneratia caseolaris in different mangrove communities (Means±SE). Scc,Sonneratia caseolaris community; Amc, Avicennia marina community; Kcc, Kandelia candel community; Gap, Forest gap. Different letters indicate significant difference at 0.05 level.
Fig. 4 Seedling density, height and coverage of different mangrove species during the first four surveys (Means±SE). Sc,Sonneratia caseolaris; Kc, Kandelia candel; Am, Avicennia marina; Ac, Aegiceras coniculatum; Ai, Acanthus ilicifolius. Different letters indicate significant difference from each other species at 0.05 level.
步数 Step | 偏回归系数 Partial regression coefficient | 截距 Intercept | R2 | P > / F / | ||||
---|---|---|---|---|---|---|---|---|
Ac | Kc | Ac | Kc | 截距 Intercept | 模型 Model | |||
Step 1 | -4.568 | 29.214 | 0.028 | 0.035 | 0.000 | 0.035 | ||
Step 2 | -5.051 | 2.362 | 25.974 | 0.054 | 0.019 | 0.040 | 0.000 | 0.013 |
Table 2 Stepwise regressions between seedling densities of Sonneratia caseolaris and other mangrove species (Sep., 2006)
步数 Step | 偏回归系数 Partial regression coefficient | 截距 Intercept | R2 | P > / F / | ||||
---|---|---|---|---|---|---|---|---|
Ac | Kc | Ac | Kc | 截距 Intercept | 模型 Model | |||
Step 1 | -4.568 | 29.214 | 0.028 | 0.035 | 0.000 | 0.035 | ||
Step 2 | -5.051 | 2.362 | 25.974 | 0.054 | 0.019 | 0.040 | 0.000 | 0.013 |
林型 Forest type | 测定时间 Measurement time | 相关方程 Correlation equation | R2 | P |
---|---|---|---|---|
天然林(白骨壤林+秋茄林) Natural forest | 2006.09.12 | y =-18.79x+25.43 | 0.001 | 0.730 |
2006.10.30 | y= 9.60x+3.30 | 0.002 | 0.635 | |
2006.12.13 | y = 6.28x+1.80 | 0.003 | 0.601 | |
2007.01.28 | y = 4.06x+0.39 | 0.005 | 0.480 | |
人工海桑林 Introduced S. caseolaris forest | 2006.09.12 | y = 78.08x+2.94 | 0.160 | 0.002 |
2006.10.30 | y = 71.41x-6.33 | 0.267 | 0.000 | |
2006.12.13 | y = 75.62x-10.50 | 0.369 | 0.000 | |
2007.01.28 | y = 46.56x-7.59 | 0.364 | 0.000 |
Table 3 Corelation analysis between the seedlings density of Sonneratia caseolaris and relative light intensity
林型 Forest type | 测定时间 Measurement time | 相关方程 Correlation equation | R2 | P |
---|---|---|---|---|
天然林(白骨壤林+秋茄林) Natural forest | 2006.09.12 | y =-18.79x+25.43 | 0.001 | 0.730 |
2006.10.30 | y= 9.60x+3.30 | 0.002 | 0.635 | |
2006.12.13 | y = 6.28x+1.80 | 0.003 | 0.601 | |
2007.01.28 | y = 4.06x+0.39 | 0.005 | 0.480 | |
人工海桑林 Introduced S. caseolaris forest | 2006.09.12 | y = 78.08x+2.94 | 0.160 | 0.002 |
2006.10.30 | y = 71.41x-6.33 | 0.267 | 0.000 | |
2006.12.13 | y = 75.62x-10.50 | 0.369 | 0.000 | |
2007.01.28 | y = 46.56x-7.59 | 0.364 | 0.000 |
林型 Forest type | 测定时间 Measurement time | 变量 Variables | 偏回归系数 Partial regression coefficient | 偏相关系数 Partial correlations | t | P |
---|---|---|---|---|---|---|
天然林 Natural forest | 2006.09.12 | 扩散距离 Dispersal distance | -37.931 | -0.544 | -6.518 | 0.000 |
常数 Constant | 104.802 | 8.200 | 0.000 | |||
2006.10.30 | 滩面高程 Tidal elevation | -19.785 | -0.274 | -2.858 | 0.005 | |
扩散距离 Dispersal distance | -5.370 | -0.214 | -2.201 | 0.030 | ||
常数 Constant | 49.093 | 4.345 | 0.000 | |||
2006.12.13 | 扩散距离 Dispersal distance | -3.939 | -0.258 | -2.689 | 0.008 | |
滩面高程 Tidal elevation | -8.248 | -0.194 | -1.984 | 0.050 | ||
常数 Constant | 24.633 | 3.631 | 0.000 | |||
2007.01.28 | 扩散距离 Dispersal distance | -2.005 | -0.280 | -2.943 | 0.004 | |
常数 Constant | 4.904 | 3.267 | 0.001 | |||
人工海桑林 Introduced S. caseolaris forest | 2006.09.12 | 光照强度 Light intensity | 0.430 | 0.460 | 3.805 | 0.000 |
常数 Constant | -0.731 | -0.090 | 0.929 | |||
2006.10.30 | 光照强度 Light intensity | 0.038 | 0.587 | 5.324 | 0.000 | |
常数 Constant | -9.113 | -1.757 | 0.085 | |||
2006.12.13 | 光照强度 Light intensity | 0.039 | 0.654 | 6.357 | 0.000 | |
常数 Constant | -12.502 | -2.801 | 0.007 | |||
2007.01.28 | 光照强度 Light intensity | 0.024 | 0.671 | 0.655 | 0.000 | |
常数 Constant | -8.983 | -3.408 | 0.001 |
Table 4 Multiple regressions between the seedlings densities of Sonneratia caseolaris and key ecological factors under introduced Sonneratia caseolaris forest and natural forest
林型 Forest type | 测定时间 Measurement time | 变量 Variables | 偏回归系数 Partial regression coefficient | 偏相关系数 Partial correlations | t | P |
---|---|---|---|---|---|---|
天然林 Natural forest | 2006.09.12 | 扩散距离 Dispersal distance | -37.931 | -0.544 | -6.518 | 0.000 |
常数 Constant | 104.802 | 8.200 | 0.000 | |||
2006.10.30 | 滩面高程 Tidal elevation | -19.785 | -0.274 | -2.858 | 0.005 | |
扩散距离 Dispersal distance | -5.370 | -0.214 | -2.201 | 0.030 | ||
常数 Constant | 49.093 | 4.345 | 0.000 | |||
2006.12.13 | 扩散距离 Dispersal distance | -3.939 | -0.258 | -2.689 | 0.008 | |
滩面高程 Tidal elevation | -8.248 | -0.194 | -1.984 | 0.050 | ||
常数 Constant | 24.633 | 3.631 | 0.000 | |||
2007.01.28 | 扩散距离 Dispersal distance | -2.005 | -0.280 | -2.943 | 0.004 | |
常数 Constant | 4.904 | 3.267 | 0.001 | |||
人工海桑林 Introduced S. caseolaris forest | 2006.09.12 | 光照强度 Light intensity | 0.430 | 0.460 | 3.805 | 0.000 |
常数 Constant | -0.731 | -0.090 | 0.929 | |||
2006.10.30 | 光照强度 Light intensity | 0.038 | 0.587 | 5.324 | 0.000 | |
常数 Constant | -9.113 | -1.757 | 0.085 | |||
2006.12.13 | 光照强度 Light intensity | 0.039 | 0.654 | 6.357 | 0.000 | |
常数 Constant | -12.502 | -2.801 | 0.007 | |||
2007.01.28 | 光照强度 Light intensity | 0.024 | 0.671 | 0.655 | 0.000 | |
常数 Constant | -8.983 | -3.408 | 0.001 |
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