Spatial patterns of leaf δ<sup>13</sup>C and δ<sup>15</sup>N of aquatic macrophytes in the arid zone of northwestern China

Gong, Xusheng; Xu, Zhiyan; Peng, Qiutong; Tian, Yun; Hu, Yang; Li, Zhongqiang; Hao, Tao

doi:10.1002/ece3.7257

Cited by 8 publications

(8 citation statements)

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“…S3, Supplementary Data 2) and maize (δ 13 C org = −12‰ 57 ), and the similarity between δ 13 C org and δ 13 C values for mid-chain n-alkanes C 25 and C 27 (Fig. S7) suggests that the isotopic observations are mainly driven by aquatic plants (i.e., macrophytes) that produce mid-chain n-alkanes 35,36,43,44,48 . Notably, the lack of 13 C enrichment in the C 29 and C 31 n-alkanes, which are the dominant n-alkanes in most terrestrial plants and are present in maize (dominant n-alkanes are C 25 -C 31 , with C 27 and C 29 present in the highest amounts 57,58 ), suggests that at this time, C 4 plants did not contribute substantially to explain the observed enrichment in δ 13 C org .…”

Section: Discussionmentioning

confidence: 90%

“…100 BCE to 200 CE (Fig. 2), indicating enhanced lacustrine primary productivity 35,45,47 and aquatic macrophyte abundance 48 . n-Alkane δ 13 C for C 23 , C 25, C 27 , C 33 , and C 35 gradually increased (similar to δ 13 C org ) to highs of −25.1‰, −26.8‰, −26.6‰, −27.6‰, and −27.0‰ ca.…”

Section: Resultsmentioning

confidence: 99%

“…800 BCE 23,25 , rising values of both δ 13 C org and δ 15 N org , accompanied by similarly increasing δ 13 C values for mid-chain n-alkanes (C 25 and C 27 ) and declining C/N ratios (Fig. 2), likely indicate greater contributions of aquatic (algal and/or macrophyte-derived) OM to the sediment 35,36,43,44,48 . These conditions were sustained through the Late Preclassic Maya occupation, suggesting intensifying cultural eutrophication and/or expansion of shallow-water macrophyte communities adjacent to Nixtun-Ch'ich' during the Middle and Late Preclassic.…”

Section: Discussionmentioning

confidence: 97%

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Preclassic environmental degradation of Lake Petén Itzá, Guatemala, by the early Maya of Nixtun-Ch’ich’

Birkett

Obrist‐Farner

Rice

et al. 2023

Commun Earth Environ

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Paleolimnological evidence indicates the ancient Maya transformed terrestrial ecosystems by felling forest vegetation to construct large civic-ceremonial centers and to expand agriculture. Human settlements influenced lacustrine environments but the effects of Maya activities on aquatic ecosystems remain poorly studied. Here we analyzed a sediment core from Lake Petén Itzá, Guatemala, to infer paleoenvironmental changes resulting from Maya occupation of the archaeological site of Nixtun-Ch’ich’. Increases in charcoal and fecal stanol concentrations indicate Maya occupation of the Candelaria Peninsula by the late Early Preclassic period. Geochemical proxies reveal a period of lake ecosystem alteration during construction and expansion of the city’s urban grid in the Middle and Late Preclassic periods. Depopulation of the city in the Terminal Preclassic resulted in a decline in lake trophic state. Whereas previous studies of Petén waterbodies have indicated depressed lacustrine primary production, the core collected near Nixtun-Ch’ich’ shows evidence of ancient Maya lake ecosystem deterioration.

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Section: Discussionmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 97%

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Preclassic environmental degradation of Lake Petén Itzá, Guatemala, by the early Maya of Nixtun-Ch’ich’

Birkett

Obrist‐Farner

Rice

et al. 2023

Commun Earth Environ

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“…Carbon isotopic value is expressed as the standard notation relative to the Vienna Pee Dee Belemnite standard using the following equation: δ 13 C = (R sample /R standard − 1) × 1000 (‰), where R sample and R standard are the 13 C/ 12 C ratios of the sample and the standard, respectively [ 31 ]. In our study, leaf δ 13 C values of C 3 plants were obtained from the database established by Li et al [ 7 ].…”

Section: Methodsmentioning

confidence: 99%

The Variations of Leaf δ13C and Its Response to Environmental Changes of Arbuscular and Ectomycorrhizal Plants Depend on Life Forms

Zhang

Yuan

Shi

et al. 2022

Plants

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Arbuscular mycorrhiza (AM) and ectomycorrhiza (ECM) are the two most common mycorrhizal types and are paid the most attention to, playing a vital common but differentiated function in terrestrial ecosystems. The leaf carbon isotope ratio (δ13C) is an important factor in understanding the relationship between plants and the environment. In this study, a new database was established on leaf δ13C between AM and ECM plants based on the published data set of leaf δ13C in China’s C3 terrestrial plants, which involved 1163 observations. The results showed that the differences in leaf δ13C between AM and ECM plants related closely to life forms. Leaf δ13C of ECM plants was higher than that of AM plants in trees, which was mainly led by the group of evergreen trees. The responses of leaf δ13C to environmental changes were varied between AM and ECM plants. Among the four life forms, leaf δ13C of ECM plants decreased more rapidly than that of AM plants, with an increase of longitude, except for deciduous trees. In terms of the sensitivity of leaf δ13C to temperature changes, AM plants were higher than ECM plants in the other three life forms, although there was no significant difference in evergreen trees. For the response to water conditions, the leaf δ13C of ECM plants was more sensitive than that of AM plants in all life forms, except evergreen and deciduous trees. This study laid a foundation for further understanding the role of mycorrhiza in the relationship between plants and the environment.

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“…Several δ 13 C (bulk tissue) gradients have been identified so far, for example, in correlation with moisture content for terrestrial plants, 24 as well as a positive increase of 1–2‰ km –1 altitude in terrestrial grazers, 25 hummingbirds, 26 and terrestrial leaves. 27 , 28 Temperature and p CO 2 are suspected to be the main driver of increasing δ 13 C-DIC values by altitude, however, soil respiration rate, instream metabolism, and anaerobic respiration cumulatively contribute to significant spatial variations in δ 13 C-DIC as well 29 and subsequently influence bulk and compound-specific δ 13 C values of primary producers and consumers. 30 …”

Section: Introductionmentioning

confidence: 99%

Assessment of Compound-Specific Fatty Acid δ¹³C and δ²H Values to Track Fish Mobility in a Small Sub-alpine Catchment

Pilecky

Závorka

Soto

et al. 2022

Environ. Sci. Technol.

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Methods for identifying origin, movement, and foraging areas of animals are essential for understanding ecosystem connectivity, nutrient flows, and other ecological processes. Telemetric methods can provide detailed spatial coverage but are limited to a minimum body size of specimen for tagging. In recent years, stable isotopes have been increasingly used to track animal migration by linking landscape isotope patterns into movement (isoscapes). However, compared to telemetric methods, the spatial resolution of bulk stable isotopes is low. Here, we examined a novel approach by evaluating the use of compound-specific hydrogen and carbon stable isotopes of fatty acids (δ 2 H FA and δ 13 C FA ) from fish liver, muscle, brain, and eye tissues for identifying site specificity in a 254 km 2 sub-alpine river catchment. We analyzed 208 fish (European bullhead, rainbow trout, and brown trout) collected in 2016 and 2018 at 15 different sites. δ 13 C FA values of these fish tissues correlated more among each other than those of δ 2 H FA values. Both δ 2 H FA and δ 13 C FA values showed tissue-dependent isotopic fractionation, while fish taxa had only small effects. The highest site specificity was for δ 13 C DHA values, while the δ 2 H isotopic difference between linoleic acid and alpha-linolenic acid resulted in the highest site specificity. Using linear discrimination analysis of FA isotope values, over 90% of fish could be assigned to their location of origin; however, the accuracy dropped to about 56% when isotope data from 2016 were used to predict the sites for samples collected in 2018, suggesting temporal shifts in site specificity of δ 2 H FA and δ 13 C FA . However, the predictive power of δ 2 H FA and δ 13 C FA over this time interval was still higher than site specificity of bulk tissue isotopes for a single time point. In summary, compound-specific isotope analysis of fatty acids may become a highly effective tool for assessing fine and large-scale movement and foraging areas of animals.

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Spatial patterns of leaf δ¹³C and δ¹⁵N of aquatic macrophytes in the arid zone of northwestern China

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 8 publications

References 60 publications

Preclassic environmental degradation of Lake Petén Itzá, Guatemala, by the early Maya of Nixtun-Ch’ich’

Preclassic environmental degradation of Lake Petén Itzá, Guatemala, by the early Maya of Nixtun-Ch’ich’

The Variations of Leaf δ13C and Its Response to Environmental Changes of Arbuscular and Ectomycorrhizal Plants Depend on Life Forms

Assessment of Compound-Specific Fatty Acid δ¹³C and δ²H Values to Track Fish Mobility in a Small Sub-alpine Catchment

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Spatial patterns of leaf δ13C and δ15N of aquatic macrophytes in the arid zone of northwestern China

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 8 publications

References 60 publications

Preclassic environmental degradation of Lake Petén Itzá, Guatemala, by the early Maya of Nixtun-Ch’ich’

Preclassic environmental degradation of Lake Petén Itzá, Guatemala, by the early Maya of Nixtun-Ch’ich’

The Variations of Leaf δ13C and Its Response to Environmental Changes of Arbuscular and Ectomycorrhizal Plants Depend on Life Forms

Assessment of Compound-Specific Fatty Acid δ13C and δ2H Values to Track Fish Mobility in a Small Sub-alpine Catchment

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Product

Resources

About

Spatial patterns of leaf δ¹³C and δ¹⁵N of aquatic macrophytes in the arid zone of northwestern China

Assessment of Compound-Specific Fatty Acid δ¹³C and δ²H Values to Track Fish Mobility in a Small Sub-alpine Catchment