Molecular links between whitesand ecosystems and blackwater formation in the Rio Negro watershed

Simon, Carsten; Pimentel, Tânia P.; Monteiro, Maria Terezinha Ferreira; Cândido, Luiz Antônio; Gastmans, Didier; Geilmann, Heike; Oliveira, Regison da Costa; Rocha, João Batista; Pires, Elaine; Quesada, Carlos A.; Forsberg, Bruce R.; Ferreira, Svio; Cunha, H.B. da; Gleixner, Gerd

doi:10.1016/j.gca.2021.06.036

Cited by 7 publications

(2 citation statements)

References 117 publications

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“…However, the relatively higher contributions of the terrestrially derived OM at the distance of 20 km away from the Xianghai Lake at depths from 20 to 60 m bls (Figure S7 in the Supporting Information S1) were likely related to the absence of clay layers, which was evidenced by elevated δ 18 O values (Figure S2c in the Supporting Information S1). The heavier isotopic compositions of groundwater within the zone likely reflected surface water infiltration from dry seasons since water isotopes can serve as a robust indicator of water sources (Simon et al, 2021). The three-end-member mixing model results also showed that groundwater in this zone had high fractions of surface water (Figure S2b in the Supporting Information S1).…”

Section: Distinct Dom Sources In Shallow and Deep Groundwatermentioning

confidence: 91%

Dissolved Organic Matter Sources in High Arsenic Groundwater From a Sand‐Gravel Confined Aquifer

et al. 2023

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High arsenic (As) groundwater (>10 μg/L) has been recognized as a global environmental issue threatening up to 220 million people throughout the world (Podgorski & Berg, 2020). Chronic intake of high-As groundwater may cause severe arsenicosis, such as skin lesions and cancers (Hug et al., 2020). Many works in the literature have revealed that high-As groundwater mainly occurs in Late Pleistocene-Holocene anoxic aquifers with

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Section: Distinct Dom Sources In Shallow and Deep Groundwatermentioning

confidence: 91%

Dissolved Organic Matter Sources in High Arsenic Groundwater From a Sand‐Gravel Confined Aquifer

et al. 2023

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“…In karst regions, karst stores CO 2 in the atmosphere and soil as dissolved inorganic carbon (DIC) in karst water bodies [29]. Dissolved organic carbon (DOC) is not only an important component of organic carbon in water bodies but also an important component of the activated carbon pool in karst ecosystems [30,31]. Until now, research on carbon and nitrogen in water bodies has mainly focused on aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification Control

Liu

Xiong

et al. 2023

Forests

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Rocky desertification is a common phenomenon in karst areas. Soil carbon and nitrogen storage is of great significance to the formation and evolution of ecosystems. Soil leakage is one of the important indicators in evaluating ecosystem stability. There are few studies on the response of carbon and nitrogen leakage below the surface of karst critical zones to forest ecosystems. The karst springs in the study area of Shibing Heichong, Bijie Salaxi and Guanling-Zhenfeng Huajiang in Guizhou, China, were selected to determine the variation characteristics of carbon and nitrogen content and karst spring outputs and their response to soil leakage. The results showed the following: (1) The content and output of carbon and nitrogen in karst springs in the three study areas showed obvious spatial differences. The carbon and nitrogen output of karst spring water was mainly concentrated in the rainy season. The carbon and nitrogen contents and output of karst springs in the Shibing Heichong study area were higher than those in the Bijie Salaxi and Guanling-Zhenfeng Huajiang study areas. (2) The carbon and nitrogen outputs of karst springs were mainly affected by flow. Land cover and land use in forests affect the carbon and nitrogen contents of karst springs and thus affect the output. (3) The higher the soil leakage of the karst spring was, the higher the carbon and nitrogen output. The leakage of the overlying soil in the Shibing Heichong study area was high, but the soil decline was small, and the stability of the forest ecosystem was relatively good. In summary, a lower degree of rocky desertification results in higher leakage from karst springs and higher risks of soil leakage; however, the ecosystem was relatively stable. Evaluating forest soil carbon and nitrogen loss and ecosystem stability in karst areas through the nutrient output of karst springs is of great significance for the prevention and control of rocky desertification areas.

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Dissolved Organic Carbon (DOC) of the Rio Negro, Amazonia: Importance, Processes and Potential Anthropogenic Impacts

Johannsson,

Holland

2024

The Future of Amazonian Aquatic Biota

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Molecular links between whitesand ecosystems and blackwater formation in the Rio Negro watershed

Cited by 7 publications

References 117 publications

Dissolved Organic Matter Sources in High Arsenic Groundwater From a Sand‐Gravel Confined Aquifer

Dissolved Organic Matter Sources in High Arsenic Groundwater From a Sand‐Gravel Confined Aquifer

Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification Control

Dissolved Organic Carbon (DOC) of the Rio Negro, Amazonia: Importance, Processes and Potential Anthropogenic Impacts

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