Variation in photosynthetic photon flux density within a tropical seasonal rain forest of Xishuangbanna, south-western China
文献类型：期刊论文
| 作者 | Dou, JX; Zhang, YP; Feng, ZW; Liu, WJ |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
 |
| 出版日期 | 2005 |
| 卷号 | 17期号:6页码:966-969 |
| 关键词 | photosynthetic photon flux density temporal light variability tropical seasonal rain forest canopy Xishuangbanna |
| 英文摘要 | The effects of canopy development, solar angle, and weather conditions on temporal variation in photosynthetic photon flux density(PPFD) at three heights within a tropical rain forest canopy in Xishuangbanna, China, were examined. PPFD was measured every second and stored as 10-min averages from I December 2002 to 30 November 2003. PPFD variability was examined at three different temporal scales. Specific days in March, September, and December with clear and overcast sky conditions were selected to separate the effects of leaf area index(LAI) and solar angle on diurnal variability. On both clear and overcast days, mean daily average PPFD was significantly different between March and September at all heights, except 10 m on clear days, suggesting that LAI directly influences PPFD. In contrast, the differences in daily average PPFD among three heights between September and December were likely due to variation in solar angle. In addition, daily average PPFD at all locations were significantly lower under overcast than clear sky conditions in March, September and December. Over the year-long study, the mean daily total PPFD at 21 m, 10 m and 4 m was 2.8, 2.7 and 0.7 mol/(m(2.)d), which accounted for 9.7%, 9.4% and 2.4% of the daily PPFD above the canopy, respectively. Significant differences in mean daily total PPFD occurred at the same heights among different seasons, and diurnal, day-to-day and seasonal PPFD varied at different heights within the canopy. The possible effects of light variability on physiological and morphological responses of plants are discussed. |
| 学科主题 | Environmental Sciences & Ecology |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| WOS记录号 | WOS:000233402200018 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/23122]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Dou, JX,Zhang, YP,Feng, ZW,et al. Variation in photosynthetic photon flux density within a tropical seasonal rain forest of Xishuangbanna, south-western China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2005,17(6):966-969. |
| APA | Dou, JX,Zhang, YP,Feng, ZW,&Liu, WJ.(2005).Variation in photosynthetic photon flux density within a tropical seasonal rain forest of Xishuangbanna, south-western China.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,17(6),966-969. |
| MLA | Dou, JX,et al."Variation in photosynthetic photon flux density within a tropical seasonal rain forest of Xishuangbanna, south-western China".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 17.6(2005):966-969. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。