Sediment organic carbon dynamics response to land use change in diverse watershed anthropogenic activities

Xiao, Tao; Ran, Fengwei; Li, Zhongwu; Wang, Shilan; Nie, Xiaodong; Liu, Yaojun; Yang, Changrong; Tan, Min; Feng, Sirui

doi:10.1016/j.envint.2023.107788

Cited by 15 publications

(9 citation statements)

References 130 publications

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“…However, the spatiotemporal heterogeneity of lake‐watershed systems is still evident at the watershed scale. Previously, we investigated lake sediment dynamics and their responses to human activities within different subbasins (Xiao et al., 2023). Nevertheless, the pathways of short‐term abrupt events and long‐term pressures at the sub‐basin scale remain unclear.…”

Section: Discussionmentioning

confidence: 99%

“…The catchment data required to describe the sediment proxy included meteorological, hydrological, and human activity statistics. Data collected from the Dongting Lake basin since the Anthropocene, a period when the official statistical records of China provided better regional trends for climate, population, land‐use changes, and hydrology, were sufficient to conduct an exploration of long‐term socio‐ecological relationships (Kong et al., 2017; Xiao et al., 2023). A total of 16 indicators were collected.…”

Section: Methodsmentioning

confidence: 99%

“…Although the social development of Dongting Lake in terms of population, economy, agrarianizing, and urbanization has varied among the sub-basins since 1950, it has continuously affected land-use changes over a long period, thus triggering soil erosion and material deposition in the lake Xiao et al, 2023). These watershed ecological changes recorded in the sediments have been explored in terms of sediment source, material composition, and content dynamics (Du et al, 2001;Wang et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

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Driver–response relationships in a large shallow lake since the Anthropocene: Short‐term abrupt perturbations versus long‐term sustainable pressures

Ran,

Wang,

Nie

et al. 2024

Global Change Biology

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Lakes, as integral social‐ecological systems, are hotspots for exploring climatic and anthropogenic impacts, with crucial pathways revealed by continuous sediment records. However, the response of multi‐proxies in large shallow lakes to typical abrupt events and sustained drivers since the Anthropocene remains unclear. Here, we explored the driver‐identification relationships between multi‐proxy peaks and natural and anthropogenic events as well as the attribution of short‐term perturbations and long‐term pressures. To this end, sediment core records, socio‐ecological data, and documented events from official records were integrated into a large shallow lake (Dongting Lake, China). Significant causal cascades and path effects (goodness‐of‐fit: 0.488; total effect: −1.10; p < .001) were observed among catchment environmental proxies, lake biogenic proxies, and mixed‐source proxies. The peak‐event identification rate (PEIR) and event‐peak driving rate were proposed, and values of 28.57%–46.43% and 50%–81.25% were obtained, respectively. The incomplete accuracy of depicting event perturbations using sediment proxies was caused by various information filters both inside and outside the lake. PEIRs for compound events were 1.41 (±0.72) and 1.09 (±0.46) times greater than those for anthropogenic‐dominated and natural‐dominated events, respectively. Furthermore, socio‐economic activity, hydrologic dynamics, land‐use changes, and agriculture exerted significant and persistent pressures, cumulatively contributing 55.3%–80.9% to alterations in sediment proxies. Relatively synergistic or antagonistic trends in temporal contributions of these forces were observed after 2000, which were primarily attributed to the “Grain for Green” project and the Three Gorges Dam. This study represents one of the few investigations to distinguish the driver–response relationship of multiple proxies in large shallow lakes under typical event perturbations and long‐term sustained pressures since the Anthropocene. The findings will help policymakers and managers address ecological perturbations triggered by climate change and human activities over long‐term periods.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Driver–response relationships in a large shallow lake since the Anthropocene: Short‐term abrupt perturbations versus long‐term sustainable pressures

Ran,

Wang,

Nie

et al. 2024

Global Change Biology

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“…The intensified socio‐economic activities such as population density, GDP, and urbanization rate accelerated the growth of agriculture and industry and increased vegetation coverage in the watershed. Such human‐induced changes, on the one hand, speeded up lake sedimentation state transitions by shifting the watershed land use through increasing the demand for cropland, forest land, and construction land (Wynants et al 2021; Xiao et al 2023); on the other hand, they mitigated the occurrence of lake sedimentation state shifts by curbing soil erosion, reducing the amounts of sand and water in the basin, and decreasing hydrological fluctuations (Syvitski et al 2005; Wang et al 2015). Among all catchment drivers, the significant direct effects of land‐use change and hydrologic dynamics were emphasized on the lake sedimentation state in Dongting Lake, with relative contributions of 14.56% and 16.30%, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…The regime and state shifts were mainly concentrated on hydromorphological processes, sediment siltation/erosion, and river‐floodplain relationships in Dongting Lake (Zhou et al 2015; Lu et al 2018; Yu et al 2018). The dynamics and drivers of lake sedimentation rates were also investigated from sediment cores around Dongting Lake (Xiao et al 2023). However, little knowledge of sedimentation state transitions in Dongting Lake, and their role in the lake‐catchment system has constrained systematic understanding of the driver‐response relationships in aquatic ecosystems.…”

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confidence: 99%

A significant loop of lake sedimentation state links catchment eco‐surroundings and lake biogenic regime shifts

Ran

Nie

Wang

et al. 2023

Limnology & Oceanography

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As an important destination for upstream materials and element accumulation, lake sediments hold a multitude of contextual information about climatic changes and anthropogenic disturbances. However, understanding the lake sedimentation state to link catchment pressures and biogenic regime shifts remains challenging. To address this, research was conducted on the lake sedimentation state, including the dynamics, catchment drivers, effects on biogenic regimes, and responses to typical historical events using nine sediment cores from Dongting Lake, China, a typical global priority ecoregion. Three transitions of lake sedimentation state were distinguished over the century (1937, 1968, and 1993), whereby hydrologic dynamics and land‐use changes in the watershed were the direct drivers with relative contributions of 16.30% and 14.56%, respectively. Lake sedimentation state and organic matter inputs not only preceded sediment biogenic elements at the shift time but also exhibited nonlinear trigger effects on biogenic element contents (R2 = 0.47, p < 0.01), which promoted an increase in sediment biogenic element burial rates. Rate of change analysis indicated that intensive human activities altered the relationship between the sedimentation state and biogenic regime shift, thus revealing the response to anthropogenic events in the catchment. Pathways quantified by the partial least squares path model established the link between watershed attributes and lake biogenic properties via the lake sedimentation state. Our findings revealed a cascading linkage among catchment eco‐surroundings, lake sedimentation states, and biogenic regime shifts. The research further provided insights into driver‐response relationships in lake‐catchment systems.

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Comparison of spatiotemporal burial and contamination of heavy metals in core sediments of two plateau lakes with contrasting environments: implication for anthropogenic-driven processes

Wang,

Jiang,

Zhao

et al. 2023

Environ Monit Assess

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Sediment organic carbon dynamics response to land use change in diverse watershed anthropogenic activities

Cited by 15 publications

References 130 publications

Driver–response relationships in a large shallow lake since the Anthropocene: Short‐term abrupt perturbations versus long‐term sustainable pressures

Driver–response relationships in a large shallow lake since the Anthropocene: Short‐term abrupt perturbations versus long‐term sustainable pressures

A significant loop of lake sedimentation state links catchment eco‐surroundings and lake biogenic regime shifts

Comparison of spatiotemporal burial and contamination of heavy metals in core sediments of two plateau lakes with contrasting environments: implication for anthropogenic-driven processes

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