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Ying Yong Sheng Tai Xue Bao. 2006 Sep;17(9):1699-704.

[Diurnal dynamics of microclimate at different succession stages of vegetation communities in inner-river wetland of Zhenjiang City].

[Article in Chinese]

Author information

1
Key Laboratory of Crop Growth Regulation of Agriculture Ministry, College of Agronomy, Nanjing Agricultural University, Nanjing 210095, China. cxp-98@163.com

Abstract

To study the diurnal dynamics of microclimate at different succession stages of vegetation communities in the inner-river wetland of Zhenjiang City, three typical communities were chosen, and the light intensity, air temperature, soil temperature, and air relative humidity were measured. The results showed that with the succession of barren land --> Phalaris arundinacea --> Phragmites communis, the diurnal mean values of light intensity, air temperature, and soil temperature decreased from 1204.7 micromol x m(-2) x s(-1) to 141.28 micro.mol x m(-2) x s(-1), 32.2 degrees C to 24.9 degrees C, and 21.83 degrees C to 19.47 degrees C, and their daily variations decreased from 1126 micromol x m(-2) x s(-1) to 265 miromol x m(-2) x s(-1), 12.75 degrees C to 4.8 degrees C, and 4.5 degrees C to 2.1 degrees C, respectively. The air relative humidity increased from 58.95% to 87.3%, while its variation decreased from 29.75% to 5.15%. Habitats were open at early succession stage but more closed at late succession stage, microclimatic conditions developed towards much more cloudy, cold, and moist, and microclimate had a less fluctuation. There were definite correlations among the light intensity, air temperature, soil temperature, and air relative humidity in the vegetation communities, but the correlation coefficients among the test factors were differed at different succession stages.

PMID:
17147184
[Indexed for MEDLINE]

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