Guicai Si

ORCID: 0000-0002-2141-3811
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About
Contact & Profiles
Research Areas
  • Soil Carbon and Nitrogen Dynamics
  • Microbial Community Ecology and Physiology
  • Geology and Paleoclimatology Research
  • Peatlands and Wetlands Ecology
  • Genomics and Phylogenetic Studies
  • Climate change and permafrost
  • Coastal wetland ecosystem dynamics
  • Heavy metals in environment
  • Paleontology and Stratigraphy of Fossils
  • Polar Research and Ecology
  • Archaeology and ancient environmental studies
  • Geological formations and processes
  • Gut microbiota and health
  • Pleistocene-Era Hominins and Archaeology
  • Methane Hydrates and Related Phenomena

Chinese Academy of Sciences
2013-2023

Northwest Institute of Eco-Environment and Resources
2020-2023

Institute of Geology and Geophysics
2013-2022

Institute of Tibetan Plateau Research
2014-2018

University of Chinese Academy of Sciences
2013-2014

The Tibetan Plateau, 'the third pole', is a region that very sensitive to climate change. A better understanding of response soil microorganisms warming important predict organic matter preservation in future scenario. We selected typically altitudinal gradient (4400 m-5200 m a.s.l) along south-facing slope Nyainqentanglha Mountains on central Plateau. Bacterial communities were investigated using terminal restriction fragment length polymorphism analysis (T-RFLP) combined with sequencing...

10.1111/1574-6941.12197 article EN FEMS Microbiology Ecology 2013-08-31

Abstract Although biodiversity and ecosystem functions are strongly shaped by contemporary environments, such as climate local biotic abiotic attributes, relatively little is known about how they depend on long-term geological processes. Here, along a 3000-m elevational gradient with tectonic faults the Tibetan Plateau (that is, Galongla Mountain in Medog County, China), we study joint effects of environments biological communities, diversity community composition plants soil bacteria,...

10.1038/s41396-019-0574-x article EN cc-by The ISME Journal 2020-01-02

Large quantities of carbon are stored in alpine grassland the Tibetan Plateau, which is extremely sensitive to climate change. However, it remains unclear whether soil organic matter (SOM) different layers responds change analogously, and microbial communities play vital roles SOM turnover topsoil. In this study we measured collected by 14C method test climatic effects on profiles. Edaphic properties northwestern Qinghai Lake were investigated explore influence turnover. surface (0-10 cm)...

10.1139/cjm-2017-0157 article EN Canadian Journal of Microbiology 2017-07-25

Abstract Soils in the Qinghai‐Tibet Plateau are young terms of development and form a thin, skeletal soil layer because gravel parent materials glaciofluvial deposit, eluvium, fluvial sediment, which extremely sensitive to global climate change. The lack understanding organic matter (SOM) transformation processes this region hinders prediction SOM stocks under future conditions. In study, were investigated by density groupings pyrolysis‐gas chromatography/tandem‐mass spectrometry...

10.1029/2018jg004599 article EN Journal of Geophysical Research Biogeosciences 2018-12-06

Nitrogen is a major limiting nutrient for the net primary production of terrestrial ecosystems, especially on sentinel alpine ecosystem. Ammonia oxidation first and rate-limiting step nitrification process thus crucial to nitrogen cycle. To decipher climatic influence ammonia oxidizers, their communities were characterized by qPCR clone sequencing targeting amoA genes (encoding alpha subunit mono-oxygenase) in soils from 7 sites over an 800 m elevation transect (4400–5200 a.s.l.), based...

10.1080/01490451.2014.925013 article EN Geomicrobiology Journal 2014-11-11

AbstractThe response of soil microbes to global warming, especially their precipitation, remains poorly known. The Tibetan Plateau is very sensitive climate change. In particular, the northeastern margin an interesting area test microbial communities as there a distinct gradient in annual precipitation from east west. We collected samples along arid and semi-arid areas Plateau. Phospholipid fatty acid (PLFA) technology was used analyze community structure total biomass. With declining...

10.1080/01490451.2014.1001094 article EN Geomicrobiology Journal 2015-06-06

10.1007/s10967-020-07415-y article EN Journal of Radioanalytical and Nuclear Chemistry 2020-10-17

Branched glycerol dialkyl tetraether (brGDGT) lipids are membrane-spanning of some bacteria that sensitive to environmental gradients, which makes it possible use brGDGT proxies estimate changes in temperatures paleoenvironmental studies. However, the potential niche partitioning brGDGT-producers remains largely unknown and brGDGT-based at middle high latitude sites overestimated. Here we present distributions along an elevation gradient (704–3760 m) southeastern Tibetan Plateau, spanning...

10.2139/ssrn.4147713 article EN SSRN Electronic Journal 2022-01-01
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