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Leaf carbon content(LCC) is widely used as an important parameter in estimating ecosystem carbon(C) storage,as well as for investigating the adaptation strategies of vegetation to their environment at a large scale.In this study,we used a dataset collected from forests(5119 plots) and shrublands(2564 plots) in China,2011–2015.The plots were sampled following a consistent protocol,and we used the data to explore the spatial patterns of LCC at three scales:plot scale,eco-region scale(n = 24),and eco-region scale(n = 8).The average LCC of forests and shrublands combined was 45.3%,with the LCC of forests(45.5%) being slightly higher than that of shrublands(44.9%).Forest LCC ranged from 40.2% to 51.2% throughout the 24 eco-regions,while that of shrublands ranged from 35% to 50.1%.Forest LCC decreased with increasing latitude and longitude,whereas shrubland LCC decreased with increasing latitude,but increased with increasing longitude.The LCC increased,to some extent,with increasing temperature and precipitation.These results demonstrate the spatial patterns of LCC in the forests and shrublands at different scales based on field-measured data,providing a reference(or standard) for estimating carbon storage in vegetation at a regional scale. 相似文献
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呼和浩特市白塔机场气象观测要素分析 总被引:1,自引:0,他引:1
利用呼和浩特市白塔机场气象站1977--2010年月平均最高、最低气温,月降水量资料和1979--2010年月平均风速资料,分析了近34a气象要素变化特征。得出:呼和浩特白塔机场近34a来,(1)年平均气温、年降水量都没有明显的变化趋势,进入21世纪以来气候变率明显变大,气候不稳定性增加;(2)气温的年日较差明显增大,气候倾向率为0.4℃/10a;(3)年平均相对湿度在三个时段存在不同的变化特征;(4)年平均风速呈现出明显的减小趋势,平均每10a减小了0.3m·s^-1(5)四个要素中,气温年日较差由小变大的突变特征最为明显,1990年前后出现突变点;平均风速则存在由大转小的突变过程,突变时间点在1996年;年平均气温南低向高的突变过程较弱,且持续时间较短;年降水量和年平均相对湿度在近34a罩均不存在气候突变现象,气候状态相对稳定。呼和浩特机场气候与市区气候存在明显的差异.还需进一步深入分析。 相似文献
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土地利用现状调查内业成图的实践和认识 总被引:1,自引:0,他引:1
本文介绍了土地利用现状调查有关图件的编绘内容,方法及有关问题的处理办法,作者根据近年来参加上饶市,南昌县,南昌市邻区等土地利用现状调查内业成图的实践,谈了几点认识。 相似文献