Natural and anthropogenic emissions of N and P to the Parnaíba River Delta in NE Brazil

Filho, Francisco José de Paula; Marins, Rozane Valente; Lacerda, Luiz Drude de

doi:10.1016/j.ecss.2015.03.020

Cited by 35 publications

(18 citation statements)

References 40 publications

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“…Depending on the element and the emission category, the calculated N and P loads may vary from 4 to 23-fold, within the range proposed by the literature (Lacerda et al, 2008;Molisani et al, 2013;Nriagu & Pacyna, 1988;Paula-Filho et al, 2015).…”

Section: Discussionsupporting

confidence: 64%

“…The temporal nitrogen (N) and phosphorous (P) loads from emission by the sugarcane crops and their relative importance on the set of natural and anthropogenic sources were evaluated by the Emission Factor Model (Lacerda et al, 2008;Nriagu & Pacyna, 1988;Paula-Filho et al, 2015) for the periods from 1978 and 1981 and from 2012 and 2015. This approach estimates N and P loads from natural processes such as soil leaching and atmospheric deposition and The N and P loads from atmospheric deposition are directly related to the basin area and the nutrient concentrations of the atmospheric deposition, adjusted by the retention rate of each element by the diversity of soils present in the basin, which were estimated according the Equation 1:…”

Section: Mapping the Land Use And Land Cover Changesmentioning

confidence: 99%

“…When natural vegetation is replaced by anthropogenic activities, such as urbanization, agriculture, animal husbandry and others, certain nutrients, such as N and P are increasingly mobilized across the landscape and may be ultimately exported to the coastal zone (Beusen et al, 2016;Paula-Filho et al, 2015;Pérez-Ruzafa et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Lentic environments, such as coastal lagoons, are more vulnerable to eutrophication, in view of their physical features and the proximity of socio‐economic activities, a primary source of nutrients, mainly nitrogen (N) and phosphorous (P) (Esteves et al, 2008; Kjerfve, 1994; Ménesguen & Lacroix, 2018). When natural vegetation is replaced by anthropogenic activities, such as urbanization, agriculture, animal husbandry and others, certain nutrients, such as N and P are increasingly mobilized across the landscape and may be ultimately exported to the coastal zone (Beusen et al, 2016; Paula‐Filho et al, 2015; Pérez‐Ruzafa et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Long‐term trophic state responses of a large tropical coastal lagoon to land use changes and nutrient transport

et al. 2021

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The watershed of a large tropical coastal lagoon, historically hosting large sugarcane crops, which has been reduced during the last decades. It suggests that land use and land cover changes (LULCC) would lower the trophic state of the coastal lagoon due to less fertilization application and consequently reducing nutrient transfer into the lagoon. In this context, this study assessed the influence of LULCC, represented by the reduction of the sugarcane crops on the trophic state of a large tropical coastal lagoon. This influence was assessed by means of information about the long-term overall mass-balance budget, involving the estimation of the N and P loads from the sugarcane crops, other anthropogenic sources and natural processes; measurements of the river N and P fluxes into the lagoon; its seaward outflow and the long-term lacustrine nutrient retention. The results indicate that sugarcane crop reduction represented a decrease of 686 t of N and 51 t of P being emitted to the lagoon watershed. However, N and P loads from sugarcane crops were partially replaced by other anthropogenic activities, but even with the reduction of the nutrient fluxes, the long-term supereutrophic responses of the coastal lagoon was maintained. The sediment-related C/N and isotopic composition of the lagoon was sensitive to LULCC, indicating changes on the organic matter inputs into the lagoon. The trophic state was also influenced by the soil N and P accumulation and the long-term nutrient retention within the lagoon imposed by its restricted water connection to the sea.

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Section: Discussionsupporting

confidence: 64%

Section: Mapping the Land Use And Land Cover Changesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Long‐term trophic state responses of a large tropical coastal lagoon to land use changes and nutrient transport

et al. 2021

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“…Emission factors, instead of measuring water quality parameters, may be easily applied to provide the potential contribution regarding pollutants and nutrients able to trigger eutrophication. In addition, changes in industrial and urban procedures and techniques and their actual increasing or decreasing impacts on mangroves, can be assessed by comparing them with emissions from natural processes only [96,112].…”

Section: Urbanization and Industrializationmentioning

confidence: 99%

Can Sustainable Development Save Mangroves?

2022

Self Cite

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The Earth is warming, ecosystems are being overexploited, oceans are being polluted, and thousands of species are going extinct—all fueled by the need for a permanent increase in production for more consumerism and development. “Business as usual” continues untouched, while increasing attention has been given to the “sustainable development” concept. Despite their importance as life supporting ecosystems, forests, oceans, and wetlands are being destroyed at an accelerating rate. The conservation and restoration of mangroves, for example, are also vital for the planet to face catastrophic global warming. Based on a non-systematic literature review, we address how true mangrove conservation is incompatible with so-called “sustainable development”. We turn to the urgent changes needed to avoid environmental and societal collapse, promoted by the Western economic development paradigm, and address why the sustainable development approach has failed to stop environmental degradation and protect resources for next generations. Proposed solutions involve the rejection of the capital-oriented, nature-predatory systems, degrowth, a deep transformation of our energy matrix, and a shift in our nutrition to lower levels of the food chain. These are based on a profound sense of responsibility over the planet, respecting all life forms, ecosystem dynamics, and life sustaining properties of the biosphere.

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The retention efficiency of a large dam and reservoir eutrophication in a tropical coastal watershed under a rainfall reduction scenario

dos Reis Veríssimo,

Molisani

2024

Ecohydrology

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Tropical coastal rivers transport significant amounts of materials, and the dam's retention efficiency can affect hydrological processes generating impacts on reservoirs, such as eutrophication. Nevertheless, climate change projects uneven regional rainfall reduction, affecting surface water circulation and consequently the dam retention efficiency with possible effects on reservoir eutrophication. Here, we investigated the water, suspended particulate matter, and nutrient mass‐balance budgets in a large reservoir under a lowest rainfall year and effects on reservoir eutrophication in a tropical coastal watershed. Under low rainfall condition, the annual water budget showed that the dam water retention was limited, but the dam retained around 75% of the suspended particulate matter fluxes from the rivers. In terms of nutrients, the dam exported TN, TP and D‐Si while retaining PO43− on average; however, these circumstances fluctuated depending on the sample event. The reservoir's trophic state varied from mesotrophic to eutrophic possible reflecting the reduced dam's nutrient retention efficiency under influence of the low rainfall condition. However, 2 years following our sampling period, supereutrophic conditions and algal bloom were measured. Because human activities account for the majority of N and P loads across the watershed, mainly to soils, this biological response has been attributed to a greater rainfall regime that transfers N and P from soils to the reservoir.

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Natural and anthropogenic emissions of N and P to the Parnaíba River Delta in NE Brazil

Cited by 35 publications

References 40 publications

Long‐term trophic state responses of a large tropical coastal lagoon to land use changes and nutrient transport

Long‐term trophic state responses of a large tropical coastal lagoon to land use changes and nutrient transport

Can Sustainable Development Save Mangroves?

The retention efficiency of a large dam and reservoir eutrophication in a tropical coastal watershed under a rainfall reduction scenario

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