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Article ; Online: Historical trajectories of antibiotics resistance genes assessed through sedimentary DNA analysis of a subtropical eutrophic lake.

Yan, Dongna / Han, Yongming / Zhong, Meifang / Wen, Hanfeng / An, Zhisheng / Capo, Eric

2024 Volume 186, Page(s) 108654

Abstract: Investigating the occurrence of antibiotic-resistance genes (ARGs) in sedimentary archives provides opportunities for reconstructing the distribution and dissemination of historical (i.e., non-anthropogenic origin) ARGs. Although ARGs in freshwater ... ...

Abstract	Investigating the occurrence of antibiotic-resistance genes (ARGs) in sedimentary archives provides opportunities for reconstructing the distribution and dissemination of historical (i.e., non-anthropogenic origin) ARGs. Although ARGs in freshwater environments have attracted great attention, historical variations in the diversity and abundance of ARGs over centuries to millennia remain largely unknown. In this study, we investigated the vertical change patterns of bacterial communities, ARGs and mobile genetic elements (MGEs) found in sediments of Lake Chenghai spanning the past 600 years. Within resistome preserved in sediments, 177 ARGs subtypes were found with aminoglycosides and multidrug resistance being the most abundant. The ARG abundance in the upper sediment layers (equivalent to the post-antibiotic era since the 1940s) was lower than those during the pre-antibiotic era, whereas the ARG diversity was higher during the post-antibiotic era, possibly because human-induced lake eutrophication over the recent decades facilitated the spread and proliferation of drug-resistant bacteria. Statistical analysis suggested that MGEs abundance and the bacterial community structure were significantly correlated with the abundance and diversity of ARGs, suggesting that the occurrence and distribution of ARGs may be transferred between different bacteria by MGEs. Our results provide new perspectives on the natural history of ARGs in freshwater environments and are essential for understanding the temporal dynamics and dissemination of ARGs.
MeSH term(s)	Lakes/microbiology ; Geologic Sediments/microbiology ; Geologic Sediments/chemistry ; Eutrophication ; Bacteria/genetics ; Bacteria/drug effects ; Drug Resistance, Microbial/genetics ; Anti-Bacterial Agents/analysis ; Anti-Bacterial Agents/pharmacology ; Genes, Bacterial ; China ; Drug Resistance, Bacterial/genetics
Chemical Substances	Anti-Bacterial Agents
Language	English
Publishing date	2024-04-14
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	554791-x
ISSN	1873-6750 ; 0160-4120
ISSN (online)	1873-6750
ISSN	0160-4120
DOI	10.1016/j.envint.2024.108654
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Article: Leaf wax n-alkane carbon isotope values vary among major terrestrial plant groups: Different responses to precipitation amount and temperature, and implications for paleoenvironmental reconstruction

Liu, Jinzhao / An, Zhisheng

Earth-science reviews. 2020 Mar., v. 202

2020

Abstract: Studies focused on field measurements have been conducted to investigate how leaf wax n-alkane δ13C values vary among photosynthetic pathways (C3 vs. C4) or plant types (dicots, monocots, gymnosperms, magnoliids), and how n-alkane δ13C values respond to ... ...

Abstract	Studies focused on field measurements have been conducted to investigate how leaf wax n-alkane δ13C values vary among photosynthetic pathways (C3 vs. C4) or plant types (dicots, monocots, gymnosperms, magnoliids), and how n-alkane δ13C values respond to climate factors (precipitation, temperature). However, a systematic global analysis of plant n-alkane δ13C values with respect to major plant groups is still lacking, and the corresponding mechanism remains unknown. In this study, we compiled globally published n-alkanes δ13C data in modern plants. We find significantly negative correlations between δ13Cwt values and mean annual precipitation (MAP) for C3 plants (R2 = 0.30; p < .05), dicots (R2 = 0.28; p < .05) and magnoliids (R2 = 0.55; p < .05), but non-significant correlation between δ13Cwt values and MAP for C4 plants (R2 = 0.08; p = .12) or monocots (R2 = 0.01; p = .89). However, there are significantly positive correlations between δ13Cwt values and mean annual temperature (MAT) in C4 plants (R2 = 0.33; p < .05) and monocots (R2 = 0.35; p < .05), instead of weak correlations in C3 plants (R2 = 0.09; p < .05), dicots (R2 = 0.03; p < .05) and gymnosperms (R2 = 0.06; p = .06). These results indicate that n-alkane δ13C values in C3 dicots have more potential for paleoprecipitation reconstruction, while those in C4 monocots are more likely to indicate paleotemperature changes. Our study supports use of leaf wax n-alkane δ13C values to gain information about paleoprecipitation and paleotemperature, but only in an appropriate paleoecological context
Keywords	alkanes ; atmospheric precipitation ; C3 plants ; C4 plants ; carbon ; climatic factors ; Gymnospermae ; leaves ; Liliopsida ; Magnoliopsida ; paleoecology ; photosynthesis ; temperature
Language	English
Dates of publication	2020-03
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1792-9
ISSN	0012-8252
ISSN	0012-8252
DOI	10.1016/j.earscirev.2020.103081
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Article: Comparison of different chain n-fatty acids in modern plants on the Loess Plateau of China

Liu, Jinzhao / An, Zhisheng

Frontiers of earth science. 2020 Sept., v. 14, no. 3

2020

Abstract: n-Fatty acids (n-FAs) are widely investigated in lake sediments, yet less attention has been given to soil sedimentary n-FAs primarily derived from terrestrial plants. In this study, we performed an analysis of n-FA distributions in modern plants on the ... ...

Abstract	n-Fatty acids (n-FAs) are widely investigated in lake sediments, yet less attention has been given to soil sedimentary n-FAs primarily derived from terrestrial plants. In this study, we performed an analysis of n-FA distributions in modern plants on the Loess Plateau, China. It showed that n-FAs were generally dominated by n-C₁₆, and that short-chain (C₁₆–C₂₀), medium-chain (C₂₂–C₂₆) and long-chain (C₂₈–C₃₂) n-FAs accounted for 49.7%, 33.7% and 16.6%, respectively. The LTR (long-chain/total ratio), and medium-chain EOP (even/odd predominance) are likely to differentiate between dicots and monocots in modern plants. It is believed that this study will promote the paleo-application of soil sedimentary n-FAs on the Loess Plateau.
Keywords	Liliopsida ; Magnoliopsida ; lakes ; soil ; China
Language	English
Dates of publication	2020-09
Size	p. 615-624.
Publishing place	Higher Education Press
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	2606749-3
ISSN	2095-0209 ; 2095-0195
ISSN (online)	2095-0209
ISSN	2095-0195
DOI	10.1007/s11707-019-0801-9
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Article ; Online: Intra-leaf heterogeneities of hydrogen isotope compositions in leaf water and leaf wax of monocots and dicots.

Liu, Jinzhao / An, Zhisheng / Lin, Guanghui

The Science of the total environment

2021 Volume 770, Page(s) 145258

Abstract: Several recent studies showed that leaf wax n-alkane ... ...

Abstract	Several recent studies showed that leaf wax n-alkane δ
MeSH term(s)	Hydrogen ; Isotopes ; Plant Leaves ; Water ; Waxes
Chemical Substances	Isotopes ; Waxes ; Water (059QF0KO0R) ; Hydrogen (7YNJ3PO35Z)
Language	English
Publishing date	2021-01-21
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.145258
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Article: Intra-leaf heterogeneities of hydrogen isotope compositions in leaf water and leaf wax of monocots and dicots

Liu, Jinzhao / An, Zhisheng / Lin, Guanghui

Science of the total environment. 2021 May 20, v. 770

2021

Abstract: Several recent studies showed that leaf wax n-alkane δ²H values (δ²Hwₐₓ) within a leaf were heterogeneous in a small number of species. It still remains unclear whether the heterogeneity of intra-leaf δ²Hwₐₓ values is general for various species, how δ² ... ...

Abstract	Several recent studies showed that leaf wax n-alkane δ²H values (δ²Hwₐₓ) within a leaf were heterogeneous in a small number of species. It still remains unclear whether the heterogeneity of intra-leaf δ²Hwₐₓ values is general for various species, how δ²Hwₐₓ values vary spatially and temporally, and whether there is a common explanation for the intra-leaf δ²Hwₐₓ heterogeneity in higher plants. Here we compared the hydrogen isotope compositions of leaf wax and corresponding leaf water (δ²Hₗw) across leaf sections among a variety of monocot and dicot plant species. There is significant and consistent heterogeneity for both δ²Hwₐₓ and δ²Hₗw, i.e., base-to-tip ²H-enrichment for monocots (except Hemerocallis citrina, and Dactylis glomerata) whereas base-to-tip and center-to-edge increases in δ²Hwₐₓ and δ²Hₗw for dicots. The consistent occurrence of variations of δ²Hₗw and δ²Hwₐₓ values within a leaf imply that δ²Hwₐₓ values probably inherit point-to-pint from in-situ δ²Hₗw values, and thus the intra-leaf δ²Hwₐₓ heterogeneity mainly results from the spatial pattern of intra-leaf δ²Hₗw values associated with veinal structures between dicots and monocots. The general heterogeneity of intra-leaf δ²Hwₐₓ values further intensifies that it is necessarily needed for in-depth understanding leaf wax biomarker.
Keywords	Dactylis glomerata ; Hemerocallis ; Magnoliopsida ; alkanes ; biomarkers ; environment ; leaves
Language	English
Dates of publication	2021-0520
Publishing place	Elsevier B.V.
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.145258
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Article: Variations in hydrogen isotopic fractionation in higher plants and sediments across different latitudes: Implications for paleohydrological reconstruction

Liu, Jinzhao / An, Zhisheng

Science of the total environment. 2019 Feb. 10, v. 650

2019

Abstract: Sedimentary δDn-alkane value is widely utilized as a reliable proxy for paleo-hydrological reconstruction. Applications of this proxy must be based upon a globally clear understanding of the relationship between leaf wax δDn-alkane values and ... ...

Abstract	Sedimentary δDn-alkane value is widely utilized as a reliable proxy for paleo-hydrological reconstruction. Applications of this proxy must be based upon a globally clear understanding of the relationship between leaf wax δDn-alkane values and precipitation δD (δDp), defined as apparent fractionation (εapp). However, there is a critical concern about whether relatively constant εapp values exist across different latitudes. In this study, we systematically analyzed the variations of available εapp with latitudes based upon two compiled-new databases of higher plants and sediments over the world. We found that the total average εapp was relatively constant, i.e., −116 ± 5‰ (n = 941), in higher plants across different latitudes without consideration of plant types (e.g., dicots, monocots, gymnosperms), and was still constant but slightly lower average εapp, i.e., −125 ± 6‰ (n = 460), in sediments across the latitudes. The slightly lower average εapp in sediments relative to higher plants probably derived from the contribution of aquatic plants with isotopically D-depleted εapp in lake sediments. Interestingly, with consideration of plant types, average εapp increased in dicots but decreased in monocots slightly from low to high latitudes. The counteraction of these competing trends generates relatively constant average εapp values in higher plants, and resultantly constant average εapp values occur in sediments at the global scale. It is important to elaborate relatively constant εapp values from higher plants and sediments across different latitudes when sedimentary δDn-alkane is utilized as a proxy for paleohydrological reconstruction.
Keywords	Gymnospermae ; Liliopsida ; Magnoliopsida ; aquatic plants ; databases ; hydrogen ; hydrology ; isotope fractionation ; lakes ; latitude ; leaves ; sediments
Language	English
Dates of publication	2019-0210
Size	p. 470-478.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2018.09.047
Database	NAL-Catalogue (AGRICOLA)

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Zs.A 949: Show issues

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Article ; Online: Variations in hydrogen isotopic fractionation in higher plants and sediments across different latitudes: Implications for paleohydrological reconstruction.

Liu, Jinzhao / An, Zhisheng

The Science of the total environment

2018 Volume 650, Issue Pt 1, Page(s) 470–478

Abstract: Sedimentary ... ...

Abstract	Sedimentary δD
MeSH term(s)	Alkanes/analysis ; Databases, Factual ; Environmental Monitoring ; Geologic Sediments/chemistry ; Hydrogen/analysis ; Hydrology ; Isotopes/analysis ; Lakes/chemistry ; Plant Leaves/chemistry ; Plants/chemistry
Chemical Substances	Alkanes ; Isotopes ; Hydrogen (7YNJ3PO35Z)
Language	English
Publishing date	2018-09-05
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2018.09.047
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Article: Seasonal changes in East Asian monsoon-westerly circulation modulated by the snow-darkening effect of mineral dust

Yang, Liu / Shi, Zhengguo / Xie, Xiaoning / Li, Xinzhou / Liu, Xiaodong / An, Zhisheng

Atmospheric research. 2022 Dec. 01, v. 279

2022

Abstract: The snow-darkening forcing of dust (SFD) is known to occur when dust-covered snow reduces surface albedo and absorbs more radiation, which causes snowmelt and surface warming. To date, few studies have focused on how SFD affects atmospheric circulation. ... ...

Abstract	The snow-darkening forcing of dust (SFD) is known to occur when dust-covered snow reduces surface albedo and absorbs more radiation, which causes snowmelt and surface warming. To date, few studies have focused on how SFD affects atmospheric circulation. In this study, we used a climate model to evaluate the influence of the SFD on seasonal changes in coupled monsoon westerlies over East Asia. The results indicate that the SFD causes anomalies in temperature, precipitation, and atmospheric circulation over East Asia. In December and January (DJ), the temperature increase over the Tibetan Plateau is significant, and the anomalous anticyclonic circulation causes a weakening of the westerly circulation during this period. In February, March, and April (FMA), the SFD causes an increase in temperature over the plateau and its eastern flank and widespread anomalous cooling to the north, which can be attributed to diabatic cooling of the upper atmosphere. These changes in thermal conditions lead to enhanced westerly winds and weakened East Asian winter monsoons during FMA. The enhanced westerly winds bring more precipitation to the East Asian continent. In May, June, and July (MJJ), only the Tibetan Plateau is significantly warmed in East Asia. At this time, the westerly circulation weakens, and the East Asian summer monsoon strengthens. The low-level atmospheric circulation shows anomalous westerly winds over South Asia. The anomalous westerly winds from Central Asia bring dry air and result in reduced precipitation over India.
Keywords	Earth atmosphere ; air ; atmospheric circulation ; climate models ; cooling ; dust ; monsoon season ; research ; snow ; snowmelt ; summer ; temperature ; Central Asia ; China ; India
Language	English
Dates of publication	2022-1201
Publishing place	Elsevier B.V.
Document type	Article
ISSN	0169-8095
DOI	10.1016/j.atmosres.2022.106383
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Article ; Online: Hydroclimatic changes on multiple timescales since 7800 y BP in the winter precipitation-dominated Central Asia.

Tan, Liangcheng / Cheng, Hai / Li, Dong / Orozbaev, Rustam / Li, Yanzhen / Xu, Hai / Edwards, R Lawrence / Song, Yougui / Ma, Le / Lin, Fangyuan / Sinha, Ashish / An, Zhisheng

Proceedings of the National Academy of Sciences of the United States of America

2024 Volume 121, Issue 14, Page(s) e2321645121

Abstract: Central Asia (CA) is one of the world's most significant arid regions, which is markedly impacted by global warming. A better understanding of the dynamical processes governing its Holocene climate variability is critical for a better understanding of ... ...

Abstract	Central Asia (CA) is one of the world's most significant arid regions, which is markedly impacted by global warming. A better understanding of the dynamical processes governing its Holocene climate variability is critical for a better understanding of possible future impacts of climate change in the region. To date, most of the existing CA paleoclimate records are from the summer precipitation-dominated eastern CA (ECA), with few records from the winter precipitation-dominated western CA (WCA). Here, we present a precisely dated (~6‰) and highly resolved (<4-y) record of hydroclimatic variations from the WCA covering the period between 7,774 and 656 y BP. Utilizing multiple proxies (δ
Language	English
Publishing date	2024-03-25
Publishing country	United States
Document type	Journal Article
ZDB-ID	209104-5
ISSN	1091-6490 ; 0027-8424
ISSN (online)	1091-6490
ISSN	0027-8424
DOI	10.1073/pnas.2321645121
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Zs.A 1148: Show issues

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Article: Distinct effects of winter monsoon and westerly circulation on dust aerosol transport over East Asia

Yang, Liu / Shi, Zhengguo / Sun, Hui / Xie, Xiaoning / Liu, Xiaodong / An, Zhisheng

Theoretical and applied climatology. 2021 May, v. 144, no. 3-4

2021

Abstract: The transport of dust aerosol in East Asia is affected by the East Asian winter monsoon (EAWM) and westerly circulation both for modern and geological periods. There are obvious seasonal changes in the intensity and range of EAWM and westerly jet; ... ...

Abstract	The transport of dust aerosol in East Asia is affected by the East Asian winter monsoon (EAWM) and westerly circulation both for modern and geological periods. There are obvious seasonal changes in the intensity and range of EAWM and westerly jet; however, their impacts and relative contributions to East Asian dust transmission are still unclear. In this study, we use Regional Climate Model 4 (RegCM4) to simulate the changes in the East Asian dust cycle under present conditions, assessing the effects of EAWM and westerly jet on dust transport. The results show that the dust at the upper level is mainly transported by the westerly circulation, while that of the lower layer is mainly transported by the EAWM. In March, the westerly jet is located on the south side of the Tibet Plateau, and the high-level dust aerosol is transmitted eastward to the northern Pacific. Low-level dust is transmitted to the southeastern China with the influence of EAWM. With the northward shift of the westerly jet, the control range of the westerly winds increases in May and their correlations are weakened. In contrary, the impact of EAWM on the lower layer dust is enhanced. Due to the strengthened interaction between the westerly winds and the EAWM, they can both affect the middle-level dust transmission. The effect of EAWM is sensitive to the dust particle sizes. Under the action of EAWM, fine-grained dust is transmitted far away, while coarse-grained dust is limited to the vicinity of the source area. Once the dust is carried to the westerly layer, the influence of westerly winds on the transmission of different particle sizes dust is similar.
Keywords	aerosols ; climate models ; climatology ; dust ; monsoon season ; China
Language	English
Dates of publication	2021-05
Size	p. 1031-1042.
Publishing place	Springer Vienna
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	1463177-5
ISSN	1434-4483 ; 0177-798X
ISSN (online)	1434-4483
ISSN	0177-798X
DOI	10.1007/s00704-021-03579-z
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