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Unraveling the Role...
Unraveling the Role of Anthropogenic and Natural Drivers in Shaping the Molecular Composition and Biolability of Dissolved Organic Matter in Non-pristine Lakes
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- Zhou, Yongqiang (författare)
- Chinese Acad Sci, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
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- Zhou, Lei (författare)
- Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China.
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- Zhang, Yunlin (författare)
- Chinese Acad Sci, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
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- Zhu, Guangwei (författare)
- Chinese Acad Sci, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
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- Qin, Boqiang (författare)
- Chinese Acad Sci, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
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- Jang, Kyoung-Soon (författare)
- Korea Basic Sci Inst, Biochem Anal Grp, Cheongju 28119, South Korea.
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- Spencer, Robert G. M. (författare)
- Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA.
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- Kothawala, Dolly (författare)
- Uppsala universitet,Limnologi
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- Jeppesen, Erik (författare)
- Aarhus Univ, Dept Biosci, DK-8600 Silkeborg, Denmark.;Aarhus Univ, Ctr Water Technol WATEC, DK-8600 Silkeborg, Denmark.;Danish Ctr Educ & Res, Beijing 100190, Peoples R China.;Middle East Tech Univ, Dept Biol Sci, Limnol Lab, TR-06800 Ankara, Turkey.;Middle East Tech Univ, Ctr Ecosyst Res & Implementat, TR-06800 Ankara, Turkey.;Middle East Tech Univ, Inst Marine Sci, TR-33731 Mersin, Turkey.
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- Brookes, Justin D. (författare)
- Univ Adelaide, Water Res Ctr, Sch Biol Sci, Adelaide, SA 5005, Australia.
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- Wu, Fengchang (författare)
- Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China.
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Chinese Acad Sci, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China;Univ Chinese Acad Sci, Beijing 100049, Peoples R China. Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China. (creator_code:org_t)
- 2022-03-08
- 2022
- Engelska.
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Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 56:7, s. 4655-4664
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Lakes receive and actively process terrestrial dissolved organic matter (DOM) and play an important role in the global carbon cycle. Urbanization results in elevated inputs of nonpoint-source DOM to headwater streams. Retention of water in lakes allows time for alteration and transformation of the chemical composition of DOM by microbes and UV radiation. Yet, it remains unclear how anthropogenic and natural drivers impact the composition and biolability of DOM in non-pristine lakes. We used optical spectroscopy, Fourier transform ion cyclotron mass spectrometry, stable isotopic measurements, and laboratory bioincubations to investigate the chemical composition and biolability of DOM across two large data sets of lakes associated with a large gradient of urbanization in lowland Eastern China, encompassing a total of 99 lakes. We found that increased urban land use, gross domestic products, and population density in the catchment were associated with an elevated trophic level index, higher chlorophyll-a, higher bacterial abundance, and a higher amount of organic carbon with proportionally higher contribution of aliphatic and peptide-like DOM fractions, which can be highly biolabile. Catchment areas, water depth, lake area: catchment area, gross primary productivity, delta O-18-H2O, and bacterial abundance, however, had comparatively little linkage with DOM composition and biolability. Urban land use is currently intensifying in many developing countries, and our results anticipate an increase in the level of biolabile aliphatic DOM from nonpoint sources and accelerated carbon cycling in lake ecosystems in such regions.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- dissolved organic matter (DOM)
- lake
- biolabile
- anthropogenic
- urban land use
- FT-ICR MS
- catchment characteristics
- water residence time
- fluorescence
- mass spectrometry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Zhou, Yongqiang
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Zhou, Lei
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Zhang, Yunlin
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Zhu, Guangwei
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Qin, Boqiang
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Jang, Kyoung-Soo ...
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Spencer, Robert ...
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Kothawala, Dolly
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Jeppesen, Erik
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Brookes, Justin ...
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Wu, Fengchang
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Uppsala universitet