Evolving phytoplankton primary productivity patterns in typical Tibetan Plateau lake systems and associated driving mechanisms since the 2000s

Deng, Wanqian; Sun, Kun; Jia, Junjie; Ha, Xianrui; Lu, Yao; Wang, Shuoyue; Li, Zhaoxi; Gao, Yang

doi:10.1016/j.rsase.2022.100825

Cited by 3 publications

(2 citation statements)

References 70 publications

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“…The study area is located on the QZP (26°00′–39°47′ N, 73°19′–104° 47′ E). The total area of the QZP is approximately 2.5 × 10 6 km 2 , with an average altitude greater than 4500 m above sea level (MASL) [ 29 , 30 ]. The annual average temperature of the QZP was 3.39 °C, ranging from −19.5 °C (early February) to 25.1 °C (late July) [ 29 ], which is mainly affected by the westerlies, the East Asian monsoon, the South Asian Monsoon, and other such atmospheric circulation [ 31 ].…”

Section: Methodsmentioning

confidence: 99%

Decadal shifts in Qingzang Plateau lake carbon dynamics (1970–2020): From predominant carbon sources to emerging sinks

Shen,

Li,

Wang

et al. 2024

Environmental Science and Ecotechnology

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Section: Methodsmentioning

confidence: 99%

Decadal shifts in Qingzang Plateau lake carbon dynamics (1970–2020): From predominant carbon sources to emerging sinks

Shen,

Li,

Wang

et al. 2024

Environmental Science and Ecotechnology

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“…Seasonal rainfall patterns may transport greater quantities of suspended sediments from rivers into fish ponds, thus influencing the growth of phytoplankton. Conversely, while rainfall can introduce more nutrients into fish ponds, the subsequent rise in water volume may lead to Chl-a concentration dilution [58]. Furthermore, Chl-a concentration is subject to influence from various climate indicators and water quality parameters.…”

Section: Possible Causes Of Chl-a Changesmentioning

confidence: 99%

Monitoring Chlorophyll-a Concentration Variation in Fish Ponds from 2013 to 2022 in the Guangdong-Hong Kong-Macao Greater Bay Area, China

Li,

Yang,

Zhou

et al. 2024

Remote Sensing

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Aquaculture plays a vital role in global food production, with fish pond water quality directly impacting aquatic product quality. The Guangdong-Hong Kong-Macao Greater Bay Area (GBA) serves as a key producer of aquatic products in South China. Monitoring environmental changes in fish ponds serves as an indicator of their health. This study employed the extreme gradient boosting tree (BST) model of machine learning, utilizing Landsat imagery data, to assess Chlorophyll-a (Chl-a) concentration in GBA fish ponds from 2013 to 2022. The study also examined the corresponding spatiotemporal variations in Chl-a concentration. Key findings include: (1) clear seasonal fluctuations in Chl-a concentration, peaking in summer (56.7 μg·L−1) and reaching lows in winter (43.5 μg·L−1); (2) a slight overall increase in Chl-a concentration over the study period, notably in regions with rapid economic development, posing a heightened risk of eutrophication; (3) influence from both human activities and natural factors such as water cycle and climate, with water temperature notably impacting summer Chl-a levels; (4) elevated Chl-a levels in fish ponds compared to surrounding natural water bodies, primarily attributed to human activities, indicating an urgent need to revise breeding practices and address eutrophication. These findings offer a quantitative assessment of fish pond water quality and contribute to sustainable aquaculture management in the GBA.

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Climate change reductions in lake ice cover duration and thickness help regulate the carbon sink potential of plateau type lakes

Shen,

Wang,

Jia

et al. 2024

NSO

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Lake ice changes in winter under the influence of global climate change, but how lake ice changes will regulate water gross primary productivity (GPP) and carbon sequestration capacity is still unclear. Here, we evaluated and analyzed the geographic spatial pattern and dynamic changes of lake ice and GPP on the Qinghai-Tibetan Plateau (QTP) in the past 20 years. Results show that lake ice duration on the QTP is 123.36±2.43 d on average, although longer for lakes at higher altitudes, of moderate size, and with shallower depths. Lake ice thickness is between 55-66 cm on average, and its GPP on the QTP is between 0.17-3.35 g C m −2 d −1 . In the context of global climate change, reductions in lake ice cover duration and changes in ice thickness on the QTP increased phytoplankton GPP during the winter freeze period while decreasing Carbon dioxide (CO 2 ) emissions during the melting period.

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Evolving phytoplankton primary productivity patterns in typical Tibetan Plateau lake systems and associated driving mechanisms since the 2000s

Cited by 3 publications

References 70 publications

Decadal shifts in Qingzang Plateau lake carbon dynamics (1970–2020): From predominant carbon sources to emerging sinks

Decadal shifts in Qingzang Plateau lake carbon dynamics (1970–2020): From predominant carbon sources to emerging sinks

Monitoring Chlorophyll-a Concentration Variation in Fish Ponds from 2013 to 2022 in the Guangdong-Hong Kong-Macao Greater Bay Area, China

Climate change reductions in lake ice cover duration and thickness help regulate the carbon sink potential of plateau type lakes

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