| Impacts of caterpillar disturbance on forest net primary production estimation in China | |
| Huang L.; Huang L. | |
| 2010 | |
| 关键词 | Caterpillar disturbance NPP Spectral response curve Pigment concentration leaf-area index mountain pine-beetle difference vegetation index chlorophyll content pigment concentrations spectral reflectance budworm defoliation canopy reflectance remote imagery |
| 英文摘要 | The study described the uncertainties of NPP estimation due to larch defoliation by caterpillars during 2001-2004 in Northeastern China, which is an order of magnitude larger in area and severe than all previous recorded outbreaks. Using "representative needles" collected in the field, we related spectral responses and photosynthetic contents of needles to ecophysiological parameters in NPP estimation for different degrees of caterpillar damage. It is concluded that locations of reflection peaks at or near green red near-infrared wavelength moving toward long-wave direction with aggravated damage degree, which is useful to earlier prediction of caterpillar damage. Contents of chlorophyll-a reduced by 40.26, 66.29 and 86.88% for light, moderate and severe damage samples respectively compared with healthy, chlorophyll-b reduced by 20.79, 52.67 and 82.39%, and carotenoid reduced by 9.80, 45.06 and 73.15%. Estimated NDVI values decreased by 9.89-31.08,38.16-47.47 and 61.90-66.71%, respectively. It results to the decrease of LAI by 39.76-74.34, 85.85-93.64 and 94.61-98.51%, and reduction of FPAR and APAR by 10.16-37.47, 39.21-57.24 and 63.60-80.44%. In addition, the increased minimum visible reflectance during 580-680 nm leads to the decrease of estimated aboveground biomass by 14.62, 48.86 and 56.84%, and reduction of estimated autotrophic respiration by 10.32,39.11 and 46.95%. Ultimately, the caterpillar outbreak results to the directly underestimation of NPP by 10.01-64.63,39.32-75.37 and 80.26-100% for light, moderate and severe samples compared with healthy. Furthermore, such impacts of forest insect disturbances should be accounted for in NPP modeling to reduce the uncertainties of estimation. (C) 2010 Elsevier Ltd. All rights reserved. |
| 出处 | Ecological Indicators |
| 卷 | 10 |
| 期 | 6 |
| 页 | 1144-1151 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1470-160X |
| 内容类型 | SCI/SSCI论文 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23806]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Huang L.,Huang L.. Impacts of caterpillar disturbance on forest net primary production estimation in China. 2010. |
| 个性服务 |
| 查看访问统计 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
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。
修改评论