Long-Term Biogeochemical Changes in China's Anthropogenic Landscapes

00-7561 Elis中国人工景观的长期生物地球化学变化本研究将测量中国人口稠密的农业村落景观中碳、氮、磷(C、N、P)的生物地球化学长期变化。通过高分辨率卫星图像、二战航空摄影和精密土地调查，结合材料采样、住户调查、长辈访谈和历史资料，对代表中国农业区的5个5x5公里景观场景的工业化前(~1930年)和现状进行测量。然后将当前和工业化前的测量结果进行比较，以检查景观结构、人口密度、农业措施和燃料燃烧的变化对推动每个地点的C、N和P存储和通量的长期变化的相对影响。将实地测量与区域和遥感数据相结合，将提高世界上发展最迅速的地区之一的全球生物地球化学变化估计的准确性，示范用于研究生色生态系统的实地和统计工具。

00-7561EllisLong-term Biogeochemical Changes in China's Anthropogenic LandscapesThis study will measure long-term changes in the biogeochemistry of carbon, ni-trogen and phosphorus (C, N, P) across the densely populated agricultural village landscapes of China. The pre-industrial (~1930) and current state of five 5 x 5 km landscape scenes representative of China's agricultural regions will be measured by combining high-resolution satellite imagery, World War II aerial photography and precision land surveys with material sampling, household surveys, elder interviews and historical resources. Current and pre-industrial measurements will then be compared to examine the relative impacts of changes in landscape structure, popu-lation density, agricultural practices, and fuel combustion in driving long-term changes in C, N and P storage and flux across each site. Integration of field meas-urements with regional and remotely sensed data will improve the accuracy of global biogeochemical change estimates across one of the most rapidly developing areas of the world, demonstrating field and statistical tools for the study of anthro-pogenic ecosystems.