首页> 外文期刊>Ecological Modelling >TESTING THE CENTURY ECOSYSTEM LEVEL MODEL ON DATA SETS FROM EIGHT GRASSLAND SITES IN THE FORMER USSR REPRESENTING A WIDE CLIMATIC/SOIL GRADIENT
【24h】

TESTING THE CENTURY ECOSYSTEM LEVEL MODEL ON DATA SETS FROM EIGHT GRASSLAND SITES IN THE FORMER USSR REPRESENTING A WIDE CLIMATIC/SOIL GRADIENT

机译:在前苏联代表广泛的气候/土壤梯度的八座草原站点的数据集上测试世纪生态系统水准模型

获取原文
获取原文并翻译 | 示例
获取外文期刊封面目录资料

摘要

Long-term ecological research under the International Biological Program and several other programs at research stations within the former USSR collected a large amount of data on phytomass, productivity and element cycling, together with climatic and soil regimes for various types of grassland ecosystems. This provides a unique opportunity to assess the performance of CENTURY across a wide environmental gradient from the luxuriant highly productive meadow-steppes of Central Russia to the ultracontinental steppes of Central Asia and the arid ephemeral grasslands in the Middle-Asian republics of the former USSR. The model simulations across this broad environmental gradient proved that the CENTURY ecosystem level model reproduced the seasonal, the mid-term, and in some cases the long-term dynamics of the live and dead aboveground phytomass of the grassland ecosystems in highly different natural-climatic zones of the former USSR. The r(2) for the comparison of observed and simulated live phytomass varies from 0.41 to 0.98 and the ratio of the absolute mean error of live phytomass to the peak seasonal live phytomass varies from 10 to 20%. Tne means and variation limits of the model are close to that of field data. The results suggest that many of the model discrepancies are a result of the fact that the model does not consider year-to-year changes in plant species composition. The measured Russian phytomass data for all of the sites are available on the World Wide Web. (C) 1997 Elsevier Science B.V. [References: 63]
机译:根据国际生物计划和前苏联研究站的其他几个计划进行的长期生态研究,收集了大量有关植物群落,生产力和元素循环的数据,以及各种草地生态系统的气候和土壤状况。这提供了一个独特的机会来评估CENTURY在广泛的环境梯度中的表现,从俄罗斯中部茂盛的高产草甸草原到中亚的超大陆草原以及前苏联中亚共和国的干旱短暂草原。在广泛的环境梯度上进行的模型仿真证明,CENTURY生态系统水平模型再现了在自然气候差异很大的草地生态系统的生,死地上植物群落的季节性,中期以及某些情况下的长期动态。前苏联地区。用于比较观察到的和模拟的活体植物的r(2)在0.41到0.98之间,活体植物的绝对平均误差与季节性活体植物峰值的比率在10%到20%之间变化。模型的均值和变化极限与现场数据接近。结果表明,许多模型差异是由于该模型没有考虑植物物种组成的逐年变化这一事实造成的。可以在万维网上获得所有站点测得的俄罗斯phytomass数据。 (C)1997 Elsevier Science B.V. [参考:63]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号