Development of the algal pigment-based salinity transfer function for lakes on the Tibetan Plateau and evaluation of the quantitative reconstruction
Recent limnic environment on the Tibetan Plateau is fluctuating dramatically due to anthropogenic warming, significantly affecting primary producers and the stability of aquatic ecosystems. Fossil pigments in lake sediments have been widely used to track the response process of algae communities to...
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Elsevier
2025-01-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X24014559 |
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| author | Xinyao Sun Qi Lin Chenliang Du Shixin Huang Ke Zhang Ji Shen |
| author_facet | Xinyao Sun Qi Lin Chenliang Du Shixin Huang Ke Zhang Ji Shen |
| author_sort | Xinyao Sun |
| collection | DOAJ |
| description | Recent limnic environment on the Tibetan Plateau is fluctuating dramatically due to anthropogenic warming, significantly affecting primary producers and the stability of aquatic ecosystems. Fossil pigments in lake sediments have been widely used to track the response process of algae communities to climatic and environmental changes, but their potential in quantitative reconstructions is rarely explored, particularly in remote mountains with monitoring data scarcity. Here, the relationship between water environmental variables and surface sediment pigment assemblage identified by high-performance liquid chromatography (HPLC) covering 95 Tibetan lake sampling sites was investigated based on multivariate statistical analysis. Salinity was considered as the most important factor determining the distribution pattern of pigment assemblage, and pigment concentrations differed significantly along the lake salinity gradient. Nine chlorophyll, xanthophyll and carotenoid pigments were comprehensively assessed to develop the pigment-salinity transfer function. Sedimentary pigment preservation and salinity range have been taken into consideration, and locally weighted weighted average (LWWA, R2 = 0.74, RMSEP = 0.99 g/L) and locally weighted weighted average partial least squares (LWWAPLS, R2 = 0.74, RMSEP = 0.95 g/L) were identified as the best performing models. The pigment-based transfer function was applied to quantitatively reconstruct the salinity of Haidingnuoer Lake salinity on the northeastern Tibetan Plateau over the past 150 years, and the reliability and robustness of the reconstruction was verified. Comparison with other paleoclimatic and meteorological records revealed that the lake salinity was mainly influenced by climate-mediated changes in regional precipitation and effective moisture. This study established a new algal pigment-based salinity transfer function, and provided a promising indicator and method to quantitatively reconstruct past lake environmental conditions on the Tibetan Plateau. |
| format | Article |
| id | doaj-art-95e9087940594e24b4835e1c6062e248 |
| institution | Kabale University |
| issn | 1470-160X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj-art-95e9087940594e24b4835e1c6062e2482025-01-31T05:10:25ZengElsevierEcological Indicators1470-160X2025-01-01170112998Development of the algal pigment-based salinity transfer function for lakes on the Tibetan Plateau and evaluation of the quantitative reconstructionXinyao Sun0Qi Lin1Chenliang Du2Shixin Huang3Ke Zhang4Ji Shen5School of Geography and Ocean Science, Nanjing University, Nanjing 210023, PR ChinaKey Laboratory of Lake and Watershed Science for Water Security, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, PR China; Corresponding authors.School of Geography and Ocean Science, Nanjing University, Nanjing 210023, PR ChinaSchool of Geography and Ocean Science, Nanjing University, Nanjing 210023, PR ChinaKey Laboratory of Lake and Watershed Science for Water Security, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, PR ChinaSchool of Geography and Ocean Science, Nanjing University, Nanjing 210023, PR China; Corresponding authors.Recent limnic environment on the Tibetan Plateau is fluctuating dramatically due to anthropogenic warming, significantly affecting primary producers and the stability of aquatic ecosystems. Fossil pigments in lake sediments have been widely used to track the response process of algae communities to climatic and environmental changes, but their potential in quantitative reconstructions is rarely explored, particularly in remote mountains with monitoring data scarcity. Here, the relationship between water environmental variables and surface sediment pigment assemblage identified by high-performance liquid chromatography (HPLC) covering 95 Tibetan lake sampling sites was investigated based on multivariate statistical analysis. Salinity was considered as the most important factor determining the distribution pattern of pigment assemblage, and pigment concentrations differed significantly along the lake salinity gradient. Nine chlorophyll, xanthophyll and carotenoid pigments were comprehensively assessed to develop the pigment-salinity transfer function. Sedimentary pigment preservation and salinity range have been taken into consideration, and locally weighted weighted average (LWWA, R2 = 0.74, RMSEP = 0.99 g/L) and locally weighted weighted average partial least squares (LWWAPLS, R2 = 0.74, RMSEP = 0.95 g/L) were identified as the best performing models. The pigment-based transfer function was applied to quantitatively reconstruct the salinity of Haidingnuoer Lake salinity on the northeastern Tibetan Plateau over the past 150 years, and the reliability and robustness of the reconstruction was verified. Comparison with other paleoclimatic and meteorological records revealed that the lake salinity was mainly influenced by climate-mediated changes in regional precipitation and effective moisture. This study established a new algal pigment-based salinity transfer function, and provided a promising indicator and method to quantitatively reconstruct past lake environmental conditions on the Tibetan Plateau.http://www.sciencedirect.com/science/article/pii/S1470160X24014559Tibetan PlateauLake ecosystemPigmentTransfer functionSalinityGlobal warming |
| spellingShingle | Xinyao Sun Qi Lin Chenliang Du Shixin Huang Ke Zhang Ji Shen Development of the algal pigment-based salinity transfer function for lakes on the Tibetan Plateau and evaluation of the quantitative reconstruction Ecological Indicators Tibetan Plateau Lake ecosystem Pigment Transfer function Salinity Global warming |
| title | Development of the algal pigment-based salinity transfer function for lakes on the Tibetan Plateau and evaluation of the quantitative reconstruction |
| title_full | Development of the algal pigment-based salinity transfer function for lakes on the Tibetan Plateau and evaluation of the quantitative reconstruction |
| title_fullStr | Development of the algal pigment-based salinity transfer function for lakes on the Tibetan Plateau and evaluation of the quantitative reconstruction |
| title_full_unstemmed | Development of the algal pigment-based salinity transfer function for lakes on the Tibetan Plateau and evaluation of the quantitative reconstruction |
| title_short | Development of the algal pigment-based salinity transfer function for lakes on the Tibetan Plateau and evaluation of the quantitative reconstruction |
| title_sort | development of the algal pigment based salinity transfer function for lakes on the tibetan plateau and evaluation of the quantitative reconstruction |
| topic | Tibetan Plateau Lake ecosystem Pigment Transfer function Salinity Global warming |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X24014559 |
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