Evolving geographical gross primary productivity patterns in global lake systems and controlling mechanisms of associated phytoplankton communities since the 1950s

Jia, Junjie; Gao, Yang; Qin, Boqiang; Dungait, Jennifer; Liu, Yong; Lu, Yuexiang; Shi, Kun; Yu, Guirui

doi:10.1016/j.earscirev.2022.104221

Cited by 10 publications

(3 citation statements)

References 85 publications

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“…much greater than previously thought (i.e., 2.95 Pg C yr −1 ), 3 for which 1.85 Pg C is outgassed to the atmosphere each year, 3 0.95 Pg C is exported to oceans, 3,96 and 0.15 Pg C is buried within inland water sediment (Figure 6). 3 Additionally, aquatic algae and macrophytes autochthonously fix 0.30 Pg C yr −1 of CO 2 via photosynthesis (not calculating respiration) in inland waterbodies.…”

Section: Carbon Flux Estimations At Global and Regional Scalesmentioning

confidence: 84%

Inland water metabolic carbon processes and associated biological mechanisms that drive carbon source-sink instability

Jia,

Dungait,

et al. 2023

TIG

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Due to their complexity, inland water carbon (C) cycling processes significantly impact the C source-sink stability status of terrestrial ecosystems over short-term, long-term, and geological timescales. Stable C source-sink processes primarily include terrestrial biospheric production, lithospheric organic carbon (OC) oxidization, rock weathering, and riverine C transport. Conversely, the effect of metabolic C processes on the C source-sink status of inland waterbodies is not stable. Therefore, inland water metabolic C processes may cause significant C sink underestimations, which relevant studies have largely ignored. A new way to account for this missing inland water C sink is an in-depth understanding of the metabolic C processes and associated driving effects of biological regulation mechanisms on the C source-sink status. This new approach can help to more accurately quantify the global ecosystem C budget. The purpose of this review is threefold: (i) to clarify metabolic C processes and associated biological regulation mechanisms of inland waterbodies; (ii) to systematically analyze C cycling processes and associated C source-sink statuses of inland waterbodies at different timescales; (iii) to reveal driving mechanisms of metabolic C processes on C source-sink stability in inland waterbodies. Doing so will help us better understand how to more accurately calibrate C source-sink functions globally while also garnering an in-depth understanding of the role that terrestrial ecosystems play in C neutralization under global climate change.

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Section: Carbon Flux Estimations At Global and Regional Scalesmentioning

confidence: 84%

Inland water metabolic carbon processes and associated biological mechanisms that drive carbon source-sink instability

Jia,

Dungait,

et al. 2023

TIG

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“…13 It should be noted that phytoplankton widely distributed in lakes and reservoirs could absorb a large amount of CO 2 via photosynthesis. 48,49 The total C sequestration capacity by phytoplankton (indicated by gross primary productivity [GPP]) respective to China's inland lakes and reservoirs was estimated at 19.41 Tg C yr −1 . 50 If transported and buried C are ignored in the estimates (allowing for the fact that no accurate estimations currently exist), China's inland lakes and reservoirs over recent years could be regarded as a large C sink, with a C sequestration capacity of 12.63 Tg C yr −1 .…”

Section: Implications For China's Terrestrial C Budgetmentioning

confidence: 99%

Real-time and dynamic estimation of CO2 emissions from China��s lakes and reservoirs

Sun,

Jia,

Wang

et al. 2023

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Lakes and reservoirs act as active carbon (C) reactors and regulators. Both play a crucial terrestrial ecosystem C balance role via carbon dioxide (CO2) exchange processes across the water-air interface. It has previously been confirmed that CO2 flux from lakes and reservoirs generally exhibits significant spatiotemporal heterogeneity. Nevertheless, spatiotemporal CO2 flux variation has seldom been considered in global and regional CO2 emission estimates from lakes and reservoirs. By accounting for spatiotemporal CO2 flux and water surface area variability, we evaluated spatial and temporal CO2 emission dynamics from China��s inland lakes and reservoirs using national real-time water quality monitoring data and machine learning (ML) models. Between 2021�C2022, we estimated total C emission flux at 6.78 (��2.5) Tg C yr?1, where seasonal and regional distribution both exhibited significant heterogeneity. Our state-of-the-art estimate is significantly lower than previous estimates of 7.9~25 Tg C yr?1 from the 1980s to the 2010s. Water quality parameters (pH and dissolved oxygen [DO]) and climate factors (air temperature) were identified as the general environmental CO2 flux controls. For the first time, this study clarifies the spatiotemporal patterns and drivers of CO2 flux from China��s inland lakes and reservoirs, providing a more complete C budget picture of China��s aquatic ecosystems.

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“…Gross Primary Productivity (GPP) is the amount of organic matter produced from carbon dioxide fixation by photosynthesis in green plants per unit area per unit time. It determines the initial organic matter and energy that enters terrestrial ecosystems and directly or indirectly determines the ecosystem's provision of product services such as food, fiber, and fuel needed for human survival (Kim et al, 2017;Jia et al, 2022;Wang et al, 2022). GPP is also commonly used as a key element in measuring terrestrial ecosystem health and land-atmosphere CO 2 exchange.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal analysis of the impact of land urbanization on the gross primary productivity of vegetation in the Middle Reaches of the Yangtze River Urban Agglomeration: new evidence from the township scale

Peng,

Chen,

Wang

2023

Front. Ecol. Evol.

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The urgent need to maintain ecosystem provisioning services and achieve urban sustainable development goals has led to a long-standing focus on the driving effects of land urbanization (LU) in the Middle Reaches of the Yangtze River Urban Agglomeration (MRYRU) on vegetation cover system productivity. Previous studies have lacked consideration for the long-term correlation between land urbanization (LU) and the Gross Primary Productivity (GPP) of vegetation, as well as the spatial non-stationarity of LU’s impact in the region. This study is based on land cover remote sensing data and GPP imagery data to monitor the long-term evolution trends of LU and GPP in MRYRU from the perspectives of townships and grids. It further investigates the spatial correlation and clustering characteristics between the two using bivariate spatial autocorrelation method. Additionally, a Geographically and Temporally Weighted Regression (GTWR) model was employed to analyze the spatial effects of LU on GPP. The results indicate that the GPP of MRYRU grows to 1572.88gCm-2a-1 with an average annual growth rate of 0.848% from 2000 to 2020. High-value areas are distributed in the central and eastern mountainous of the urban agglomeration, while low-value areas gradually formed an “n”-shaped clustered distribution pattern. The negative spatial autocorrelation between LU and GPP shows a general upward trend, and Low-High is the dominant agglomeration type, concentrated in Hengyang and some mountainous cities in Jiangxi Province. The overall negative impact of land urbanization on GPP in MRYRU is maintained in the spatially nonstationary pattern of driving coefficients, with negative impact areas mostly concentrated in the city’s main city zone and positive impact areas concentrated in the urban agglomeration’s mountainous townships. This study provides support for MRYRU to adopt more resilient land optimization management strategies and vegetation ecological restoration plans.

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Evolving geographical gross primary productivity patterns in global lake systems and controlling mechanisms of associated phytoplankton communities since the 1950s

Cited by 10 publications

References 85 publications

Inland water metabolic carbon processes and associated biological mechanisms that drive carbon source-sink instability

Inland water metabolic carbon processes and associated biological mechanisms that drive carbon source-sink instability

Real-time and dynamic estimation of CO<sub>2</sub> emissions from China��s lakes and reservoirs

Spatio-temporal analysis of the impact of land urbanization on the gross primary productivity of vegetation in the Middle Reaches of the Yangtze River Urban Agglomeration: new evidence from the township scale

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