青藏高原高寒草地地上生物量对气候变化的响应（英文）

编号 zgly0001648690

文献类型 期刊论文

文献题名 青藏高原高寒草地地上生物量对气候变化的响应（英文）

作者 王力  于海英  张强  徐韵佳  陶泽兴  ALATALOJuha  戴君虎 

作者单位 CollegeofAtmosphericScience  LanzhouUniversity  QinghaiInstituteofMeteorologicalScience  InstituteofAridMeteorology  ChinaMeteorologicalAdministration  CollegeofAgroforestryEngineeringandPlanning  TongrenUniversity  KeyLaboratoryofLan 

母体文献 Journal of Geographical Sciences 

年卷期 2018年12期

年份 2018 

分类号 S812  P467 

关键词 grasslands  abovegroundbiomass  partialleastsquares  Qinghai-TibetPlateau  climatechange 

文摘内容 Aboveground biomass in grasslands of the Qinghai-Tibet Plateau has displayed an overall increasing trend during 2003–2016, which is profoundly influenced by climate change. However, the responses of different biomes show large discrepancies, in both size and magnitude. By applying partial least squares regression, we calculated the correlation between peak aboveground biomass and mean monthly temperature and monthly total precipitation in the preceding 12 months for three different grassland types(alpine steppe, alpine meadow, and temperate steppe) on the central and eastern Qinghai-Tibet Plateau. The results showed that mean temperature in most preceding months was positively correlated with peak aboveground biomass of alpine meadow and alpine steppe, while mean temperature in the preceding October and February to June was significantly negatively correlated with peak aboveground biomass of temperate steppe. Precipitation in all months had a promoting effect on biomass of alpine meadow, but its correlations with biomass of alpine steppe and temperate steppe were inconsistent. It is worth noting that, in a warmer, wetter climate, peak aboveground biomass of alpine meadow would increase more than that of alpine steppe, while that of temperate steppe would decrease significantly, providing support for the hypothesis of conservative growth strategies by vegetation in stressed ecosystems.