Variability in Dissolved Organic Matter Composition and Biolability across Gradients of Glacial Coverage and Distance from Glacial Terminus on the Tibetan Plateau

2019 ◽  
Vol 53 (21) ◽  
pp. 12207-12217 ◽  
Author(s):  
Yongqiang Zhou ◽  
Lei Zhou ◽  
Xiaoting He ◽  
Kyoung-Soon Jang ◽  
Xiaolong Yao ◽  
...  
Keyword(s):  
Organic Matter ◽  
Tibetan Plateau ◽  
Dissolved Organic Matter ◽  
The Tibetan Plateau ◽  
Organic Matter Composition

Source and biolability of ancient dissolved organic matter in glacier and lake ecosystems on the Tibetan Plateau

2014 ◽  
Vol 142 ◽  
pp. 64-74 ◽  
Author(s):  
Robert G.M. Spencer ◽  
Weidong Guo ◽  
Peter A. Raymond ◽  
Thorsten Dittmar ◽  
Eran Hood ◽  
...  
Keyword(s):  
Organic Matter ◽  
Tibetan Plateau ◽  
Dissolved Organic Matter ◽  
The Tibetan Plateau ◽  
Lake Ecosystems

scholarly journals Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories

2018 ◽  
Vol 59 (77) ◽  
pp. 31-40 ◽  
Author(s):  
Lin Feng ◽  
Yanqing An ◽  
Jianzhong Xu ◽  
Shichang Kang
Keyword(s):  
Organic Matter ◽  
Tibetan Plateau ◽  
Dissolved Organic Matter ◽  
Melting Rate ◽  
Ion Cyclotron Resonance ◽  
The Tibetan Plateau ◽  
Mountain Glaciers ◽  
Northern Tibetan Plateau ◽  
Fresh Snow ◽  
Northern Edge

AbstractDissolved organic matter (DOM) in mountain glaciers is an important source of carbon for downstream aquatic systems, and its impact is expected to increase due to the increased melting rate of glaciers. We present a comprehensive study of Laohugou glacier no. 12 (LHG) at the northern edge of the Tibetan Plateau to characterize the DOM composition and sources by analyzing surface fresh snow, granular ice samples, and snow pit samples which covered a whole year cycle of 2014/15. Excitation–emission matrix fluorescence spectroscopy analysis of the DOM with parallel factor analysis (EEM-PARAFAC) identified four components, including a microbially humic-like component (C1), two protein-like components (C2 and C3) and a terrestrial humic-like component (C4). The use of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) showed that DOM from all these samples was dominated by CHO and CHON molecular formulas, mainly corresponding to lipids and aliphatic/proteins compounds, reflecting the presence of significant amounts of microbially derived and/or deposited biogenic DOM. The molecular compositions of DOM showed more CHON compounds in granular ice than in fresh snow, likely suggesting newly formed DOM from microbes during snowmelting.

Microbial production and consumption of dissolved organic matter in glacial ecosystems on the Tibetan Plateau

2019 ◽  
Vol 160 ◽  
pp. 18-28 ◽  
Author(s):  
Lei Zhou ◽  
Yongqiang Zhou ◽  
Yang Hu ◽  
Jian Cai ◽  
Xin Liu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Tibetan Plateau ◽  
Dissolved Organic Matter ◽  
Microbial Production ◽  
The Tibetan Plateau ◽  
Production And Consumption

scholarly journals Impact of Chromophoric dissolved organic matter on light absorption in lake water on the Tibetan Plateau, China

2017 ◽  
Author(s):  
Ciren Nima ◽  
Børge Hamre ◽  
Øyvind Frette ◽  
Svein Rune Erga ◽  
Yi-Chun Chen ◽  
...  
Keyword(s):  
Organic Matter ◽  
Tibetan Plateau ◽  
Dissolved Organic Matter ◽  
Lake Water ◽  
Light Absorption ◽  
Chromophoric Dissolved Organic Matter ◽  
The Tibetan Plateau

scholarly journals Dynamic changes in size‐fractionated dissolved organic matter composition in a seasonally ice‐covered Arctic River

2021 ◽  
Author(s):  
Hui Lin ◽  
Huacheng Xu ◽  
Yihua Cai ◽  
Claude Belzile ◽  
Robie W. Macdonald ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Dynamic Changes ◽  
Organic Matter Composition

scholarly journals Microbial Community Structure Affects Marine Dissolved Organic Matter Composition

2016 ◽  
Vol 3 ◽  
Author(s):  
Elizabeth B. Kujawinski ◽  
Krista Longnecker ◽  
Katie L. Barott ◽  
Ralf J. M. Weber ◽  
Melissa C. Kido Soule
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Microbial Community ◽  
Dissolved Organic Matter ◽  
Microbial Community Structure ◽  
Organic Matter Composition

Effect of Native Vegetation Loss on Stream Ecosystem Processes: Dissolved Organic Matter Composition and Export in Agricultural Landscapes

Ecosystems ◽  
2013 ◽  
Vol 17 (1) ◽  
pp. 82-95 ◽  
Author(s):  
Darren P. Giling ◽  
Michael R. Grace ◽  
James R. Thomson ◽  
Ralph Mac Nally ◽  
Ross M. Thompson
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Ecosystem Processes ◽  
Agricultural Landscapes ◽  
Native Vegetation ◽  
Stream Ecosystem ◽  
Organic Matter Composition ◽  
Vegetation Loss
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