Grassland isotope
WebJan 15, 2024 · Organic carbon isotope records from North China Plain show a significant expansion of C 4 grasslands at ∼4 Ma. • Early Pliocene C 4 grassland expansion also documented from Pakistan, East Africa, and North and South America. • Early Pliocene C 4 grassland expansion probably driven by declining atmospheric p CO 2, not aridification. • WebDec 25, 2001 · Abstract 1. The carbon content and δ 13 C value of soil organic carbon (SOC), microbial biomass (C mic) and respired CO 2 were measured in a range of grassland soils from tropical and temperate biomes to determine if isotope effect of microbial degradation can induce a shift in isotope composition of SOC and CO 2.
Grassland isotope
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WebThe Qinghai-Tibet Plateau (QTP) is one of the main animal husbandry bases in China. The grassland area is about 1.5 million ha, accounting for 37.6% of the total grassland area of China. There are 2.26 × 10 5 ha of sown pastures and 3.3 × 10 3 ha planted to forage crops, including oats and alfalfa, in Tongde, Xinghai and Zeku counties of QTP. http://www.desert.ac.cn/article/2024/1000-694X/1000-694X-2024-43-2-184.shtml
WebDec 25, 2001 · The results presented in this study demonstrate that: (1) there is a faster turnover of SOC in tropical grassland soils, with a higher proportion of microbial biomass in the SOC of tropical grassland soils relative to temperate grassland soils; (2) on average, the isotope shift of C mic with respect to SOC is balanced by an inverse isotope shift … WebGrassland communities of arid western North America are often characterized by a seasonal increase in ambient temperature and evaporative demand and a corresponding …
WebJan 1, 2008 · It is providing insight into the functioning of grassland systems, including aspects such as the biogeochemical cycles of carbon, … WebDec 25, 2001 · 1. The carbon content and δ 13 C value of soil organic carbon (SOC), microbial biomass (C mic) and respired CO 2 were measured in a range of grassland …
Web结果表明：荒漠土壤N2O排放由硝化作用和反硝化作用主导，且具有明显的季节特征，具体表现为生长季排放量高，非生长季排放量低甚至为负。. 在总结已有研究的基础上，展望了荒漠区土壤N2O排放的研究方向及亟待解决的问题：（1）基于同位素示踪技术及分子 ...
WebAug 16, 2016 · Metrics. Grassland degradation due to overgrazing is common in many areas of the world. This study analyzed the potential of the stable carbon isotope (δ 13 C) value as a structural microcosmic ... flow move item from one list to anotherWebGrassland communities of arid western North America are often characterized by a seasonal increase in ambient temperature and evaporative demand and a … flow mountain bikesWeb20 hours ago · We measured three distinct carbon isotope signatures, each providing a different perspective on the plant community: carbon resulting from decomposition of … flow motors winston-salem used carsWeb1999a; He et al., 2001], a summertime grassland is an ideal surface from which the isotope flux ratio can be more accurately quantified. By measuring at low levels in the surface layer, the surface source of the evaporating water vapor is well defined and the water vapor samples collected near the surface must contain information about the upward flowmoveWebApr 13, 2024 · An ape that lived 21 million years ago was used to a habitat that was both grassy and wooded. Corbin RainboltHuman evolution is tightly connected to the environment and landscape of Africa, where our ancestors first emerged. According to the traditional scientific narrative, Africa was once a verdant idyll of vast forests stretching from coast to … flow mouthWebAug 16, 2016 · Grassland degradation due to overgrazing is common in many areas of the world. This study analyzed the potential of the stable … green chilli chicken rice recipeWebApr 13, 2024 · We measured three distinct carbon isotope signatures, each providing a different perspective on the plant community: carbon resulting from decomposition of vegetation and soil microbes; carbon... green chilli background