Spatial and temporal changes of dissolved oxygen in waters of the Pajarales complex, Ciénaga Grande de Santa Marta: Two decades of monitoring

Espinosa-Díaz, Luisa F.; Zapata-Rey, Yurley-Tatiana; Ibarra-Gutiérrez, Karen Patricia; Bernal, Cesar A.

doi:10.1016/j.scitotenv.2021.147203

Cited by 25 publications

(11 citation statements)

References 26 publications

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“…Two national parks have been established within the lagoon system: Salamanca Island Road Park in 1964, and the Santuario de Fauna y Flora in 1977. CGSM is the largest and most productive lagoon in the tropics due to its hydrogeochemical and biological features (Rodríguez-Rodríguez et al 2018), but is affected by deforestation, land-use changes, water pollution (including eutrophication, hypersalinity and oxygen depletion; Jaramillo et al 2018;Espinosa-Diaz et al 2021), freshwater extraction, restriction of water flows and coastal erosion. A total of 25,000 people live across several communities near the lagoon and are heavily dependent on artisanal fisheries for their livelihoods (Blanco et al 2007).…”

Section: Study Sitesmentioning

confidence: 99%

Coping and Adaptation in Response to Environmental and Climatic Stressors in Caribbean Coastal Communities

Touza

Lacambra²,

Kiss

et al. 2021

Environmental Management

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Cumulative and synergistic impacts from environmental pressures, particularly in low-lying tropical coastal regions, present challenges for the governance of ecosystems, which provide natural resource-based livelihoods for communities. Here, we seek to understand the relationship between responses to the impacts of El Niño and La Niña events and the vulnerability of mangrove-dependent communities in the Caribbean region of Colombia. Using two case study sites, we show how communities are impacted by, and undertake reactive short-term responses to, El Niño and La Niña events, and how such responses can affect their adaptive capacity to progressive environmental deterioration. We show that certain coping measures to climate variability currently deliver maladaptive outcomes, resulting in circumstances that could contribute to system ‘lock-in’ and engender undesirable ecological states, exacerbating future livelihood vulnerabilities. We highlight the significant role of social barriers on vulnerabilities within the region, including perceptions of state abandonment, mistrust and conflicts with authorities. Opportunities to reduce vulnerability include enhancing the communities’ capacity to adopt more positive and preventative responses based on demonstrable experiential learning capacity. However, these will require close cooperation between formal and informal organisations at different levels, and the development of shared coherent adaptation strategies to manage the complexity of multiple interacting environmental and climatic pressures.

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Section: Study Sitesmentioning

confidence: 99%

Coping and Adaptation in Response to Environmental and Climatic Stressors in Caribbean Coastal Communities

Touza

Lacambra²,

Kiss

et al. 2021

Environmental Management

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“…A sufficient supply of dissolved oxygen (DO) is vital for maintaining nutrient biogeochemistry, − aquatic biodiversity, and drinking water quality, and for controlling greenhouse gas emissions. , The DO levels in freshwater ecosystems depend on processes such as atmospheric exchange, water circulation, and the balance between respiration and photosynthesis. , Dissolved oxygen levels are often lower in still water in lakes or ponds than in running water systems, such as rivers or streams. The levels of DO in water systems are influenced by physicochemical and biological processes, such as diffusion, aeration, photosynthesis, and respiration . Physicochemical processes are affected by temperature, atmospheric pressure, and hydrodynamic processes or salinity, while biological processes are affected by nutrient concentrations, biological activity, and pollution. − …”

Section: Introductionmentioning

confidence: 99%

“…DO gives a comprehensive picture of river water quality and is a good indicator of changes in state. , We hypothesized that the river DO levels were the best indicator of changes in the river water quality in China . The changes in DO can not only indicate the changes in water quality but also reflect the effectiveness of the environmental regulations and engineering measures taken by the Chinese government.…”

Section: Introductionmentioning

confidence: 99%

“…The levels of DO in water systems are influenced by physicochemical and biological processes, such as diffusion, aeration, photosynthesis, and respiration. 10 Physicochemical processes are affected by temperature, atmospheric pressure, and hydrodynamic processes or salinity, while biological processes are affected by nutrient concentrations, biological activity, and pollution. 11−14 The DO levels in water will change if processes become unbalanced when aggravated by, for example, climate warming or environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

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Recovery in Dissolved Oxygen Levels in Chinese Freshwater Ecosystems in the Past Three Decades

et al. 2022

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Deoxygenation is a serious problem in oceanic waters, but few studies have documented dissolved oxygen (DO) changes in freshwater systems. In this study, the changes in DO at the national scale were analyzed in the past 30 years. The results showed that the proportion of sites with DO greater than 5 mg L −1 increased from 29.1% in 2002 to 87.45% in 2020, and the proportion of sites with DO less than 2 mg L −1 decreased from 44% in 2001 to 0.2% in 2020. There was a change point in the DO levels in 2007. DO levels can recover benefit from reduction in the pollution load. Meanwhile, further improvement in DO is challenged by global warming and inefficiency of pollutant collection and treatment. There is no doubt that the Chinese freshwater system has basically crossed the first stage of pollution control and treatment, laying a foundation for entering the stage of ecological restoration.

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“…10,11 As oxygen participates in or affects almost all chemical and biological processes in water, 12 the DO concentration in water is an important index for the assessment of water quality. 13 In addition, previous studies have recognized water temperature, 14 barometric pressure, and depth of water 15 as important factors that affect the DO concentration.…”

Section: Introductionmentioning

confidence: 99%

Effects of dissolved oxygen on water quality and biofilms in the raw water distribution pipeline for a reserved water source

Shen

Ding

et al. 2022

Environ. Sci.: Water Res. Technol.

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Spatial and temporal changes of dissolved oxygen in waters of the Pajarales complex, Ciénaga Grande de Santa Marta: Two decades of monitoring

Cited by 25 publications

References 26 publications

Coping and Adaptation in Response to Environmental and Climatic Stressors in Caribbean Coastal Communities

Coping and Adaptation in Response to Environmental and Climatic Stressors in Caribbean Coastal Communities

Recovery in Dissolved Oxygen Levels in Chinese Freshwater Ecosystems in the Past Three Decades

Effects of dissolved oxygen on water quality and biofilms in the raw water distribution pipeline for a reserved water source

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