Eutrophication: A growing problem in the Americas and the Caribbean

Rivas, E. J. González; Pérez, Germán; Tundisi, J. G.; Vammen, Katherine; Örmeci, Banu; Forde, Martin

doi:10.1590/1519-6984.200001

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…Furthermore, inoculation of microorganisms such as EMs contributes to the degradation of toxic agents (Boechat et al, 2020;Dell' Anno et al, 2020), and the control of plant pathogens (Shen et al, 2013;Alori et al, 2017;Benedetti et al, 2021). The use of these compost products for agroecological production is also environmentally friendly because excess chemical fertilizers, in addition to degrading the soil, can leach into water resources causing environmental impacts such as eutrophication (Chislock et al, 2013;Rivas et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Increased quality of small-scale organic compost with the addition of efficient microorganisms

Panisson

Muscope

Müller

et al. 2021

Rev. Bras. Ciênc. Ambient.

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Substantial quantities solid waste from livestock are potential sources of nutrients for agroecological production on small-scale farms. The processes used to extract these wastes, however, must be capable of eliminating pathogenic microorganisms. We aimed to evaluate composting and vermicomposting processes by inoculating efficient microorganisms at the field scale. We used cattle and sheep manure with the inoculation of efficient microorganisms (EMs) at concentrations of 0, 2, and 4 mL L-1. In vermicomposting experiments, we added Lumbricus rubellus. After the maturation and stabilization phases of the compounds, concentrations of macronutrients, micronutrients, heavy metals, thermotolerant coliforms and Salmonella spp. were measured. We found that composting processes allowed high availability of macronutrients. Vermicomposting, associated with inoculation with 2 mL L-1 EMs, promoted the lowest concentration of thermotolerant coliforms, ensuring greater elimination of pathogens. The compost produced allowed the valuation of waste and use it as a quality organic fertilizer for agroecological production.

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Section: Discussionmentioning

confidence: 99%

Increased quality of small-scale organic compost with the addition of efficient microorganisms

Panisson

Muscope

Müller

et al. 2021

Rev. Bras. Ciênc. Ambient.

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“…In addition to pollution sources mentioned above, eutrophication is a prevalent and widespread problem in the WCR. The main problem of eutrophication is due to insufficient sewage water treatment (Gonzalez-Rivas et al, 2020). Developing agricultural activities including overuse of fertilizers, intensive husbandry of domestic animals, aquaculture expansion, urbanization of coastal areas and accelerated erosion to watersheds, increase of nitrogen and phosphorus loads are all adding to the problem of eutrophication .…”

Section: Physiography and Environmental Pressuresmentioning

confidence: 99%

Toxic phytoplankton in eutrophic regional seas: an overview

2023

Global NEST: The International Journal

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<p>Toxic algal blooms have become a major environmental problem over the last few decades because of their impact on fisheries, leisure activities, national income and human health. It is known that Harmful Algal Blooms (HABs) can occur naturally but the frequency of occurrence as well as their geographical distribution are alarming. HABs, beyond the scientific interest, have been an issue of concern for policy makers due to the high cost for implementing management practices. Unlike other marine environmental problems, the causes of HAB formation are not known so far with certainty and a high degree of uncertainty remains, regarding possible triggering mechanisms. Various factors, apart from nutrient concentrations, seem to be connected with this phenomenon: abundance, presence and absence of phytoplankton species, presence of grazers, weather conditions, seawater temperature and water mass circulation patterns, have already been reported in the scientific literature as potential factors. However, there are strong indications that eutrophic conditions play a paramount role in HABs formation. Machine learning methods, applied over the last few years to predict HAB’s occurrences, have also confirmed the role of nutrients. In the present work, toxic algal blooms in regional seas characterized by eutrophic conditions that is the Mediterranean Sea, the Black Sea, the Baltic Sea, the North Sea, Wider Caribbean Region and the South China Sea are reviewed. Relevant issues including the drivers of eutrophication triggering HAB’s events as well as effects on ecosystem services and socio-economic consequences are also considered.</p>

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“…Seasonal intense cyanobacterial "blooms" of reservoirs bring additional undesirable properties to natural and drinking water, such as a specific smell, taste, and the presence of toxins (microcystins). In some regions, the importance of this problem has been increasing recently [15]. The Working Group on the Evaluation of Carcinogenic Risks to Humans listed cyanotoxins as a carcinogenic substance harmful to humans [16].…”

Section: Introductionmentioning

confidence: 99%

The Use of Allelochemicals of Aquatic Macrophytes to Suppress the Development of Cyanobacterial “Blooms”

Курашов¹,

Krylova²,

Протопопова³

2022

Plankton Communities

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Harmful algal “blooms”, or HABs, is a hazardous natural phenomenon that often occurs under the influence of anthropogenic factors, for example, during the anthropogenic eutrophication of water bodies. An increase in the frequency and duration of cyanobacterial “blooms” carries a number of serious threats, including local and global degradation of water resources and the impact of cyanotoxins. There are various methods of fighting cyanobacterial “blooms” - physical, chemical, the use of bacterial preparations, etc. However, these methods are not effective enough and, most importantly, do not allow effectively solving the problem of suppressing HABs in water bodies without damage to other components of the aquatic ecosystem. Allelopathy is a natural phenomenon for both stimulatory and inhibitory effects of one plant upon another including microorganisms that resolves this problem. Allelochemicals of macrophytes can be considered as natural algaecides and become the basis of a nature-like convergent technology to suppress the development of plankton cyanobacteria and prevent HABs in water bodies. In our work, we used some allelochemicals of aquatic macrophytes to create a combined algicide of the new generation for suppressing the development of cyanobacteria. The effectiveness of suppressing cyanobacterial “blooms” is demonstrated by the example of field experiments with mesocosms and natural phytoplankton.

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Eutrophication: A growing problem in the Americas and the Caribbean

Cited by 9 publications

References 3 publications

Increased quality of small-scale organic compost with the addition of efficient microorganisms

Increased quality of small-scale organic compost with the addition of efficient microorganisms

Toxic phytoplankton in eutrophic regional seas: an overview

The Use of Allelochemicals of Aquatic Macrophytes to Suppress the Development of Cyanobacterial “Blooms”

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