Methanogenesis in an impacted and two dystrophic coastal lagoons (Macaé, Brazil)

Furtado, André Luiz dos Santos; Casper, Peter; Esteves, Francisco de Assis

doi:10.1590/s1516-89132002000200011

Cited by 12 publications

(10 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The fact that no methane production was observed for any lagoon sediments (Furtado et al 2002) is confirmed by biomarker analysis on those samples. No significant amounts of biomarkers from methanogens (e.g.…”

Section: Other Sourcesmentioning

confidence: 53%

Organic matter composition in the sediment of three Brazilian coastal lagoons: district of Macaé, Rio de Janeiro (Brazil)

Zink

Furtado

Casper

et al. 2004

An. Acad. Bras. Ciênc.

Self Cite

View full text Add to dashboard Cite

Freshwater lagoons comprise important coastal ecosystems and natural buffers between urbanized land areas and open ocean in the Rio de Janeiro State, Brazil. Studies of sediment and water chemistry, zooplankton and bacterial communities to assess the extent of anthropogenic disturbance are available. Here we contribute with an organic-geochemical approach supplemented by some microbiological aspects to complete the characterization of these lagoonal ecosystems. Bulk organic matter and extractable lipids (aliphatic hydrocarbons, alcohols and fatty acids, sterols) were investigated from two locations per lagoon: at the seaward site and landward ends -and at two depth intervals (0-3 and 3-6 cm) per site. Urbanized Imboacica Lagoon received increased anthropogenic input over the most recent years represented by the topmost 3 cm of sediment, whereas deeper sediment layers are less affected by human influence. Eutrophication or nutrient availability favored enhanced algal/cyanobacterial growth. In remote Cabiúnas and Comprida Lagoons pristine conditions are preserved. Organic matter from vascular plants dominates (chain length of free lipids up to C36), which is exceptionally well preserved by acidic lagoonal waters. Differentiation between landward and seaward sites in these two lagoons is less well established due to much smaller surface/volume to catchment ratios. No anthropogenic influences are yet detectable in sediments of Cabiúnas and Comprida Lagoons.

show abstract

Section: Other Sourcesmentioning

confidence: 53%

Organic matter composition in the sediment of three Brazilian coastal lagoons: district of Macaé, Rio de Janeiro (Brazil)

Zink

Furtado

Casper

et al. 2004

An. Acad. Bras. Ciênc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In many freshwater sediment systems, methanogenesis is the dominant terminal mineralization process under anaerobic conditions (Furtado et al 2002). In a tropical coastal lagoon, the sediment presented changes that were attributed both to the detritus of aquatic macrophytes and to the surrounding restinga vegetation, which could facilitate methanogenesis (Fonseca et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Methane levels in shallow subtropical lake sediments: Dependence on the trophic status of the lake and allochthonous input

et al. 2012

Self Cite

View full text Add to dashboard Cite

a b s t r a c tThe vertical sediment profiles (10 cm) of the margins of three shallow subtropical lakes (Rio Grande, Brazil) with different trophic states and surrounding areas were evaluated to identify the effects of the allochthonous input on the methane concentration in the sediment. Sediment cores were collected to quantify the organic matter content (OM) and total carbon (TC), total nitrogen (TN), total phosphorous (TP) and methane (CH 4 ) concentrations.The three lakes were distinguished according to the trophic status and classified as oligotrophic, dystrophic and eutrophic. The natural characteristics of the dystrophic and eutrophic lakes have been changed due to the allochthonous input of leaves and twigs (Eucalyptus sp.) and the excreta of birds, respectively. In the eutrophic lake, the allochthonous input contributed to high autochthonous production. The highest values of OM, TC, TN and TP were found in the superficial sediments of the dystrophic and eutrophic lakes. The accumulation of allochthonous organic matter in the littoral zone promoted changes in the vertical sediment profiles and contributed to increases in the CH 4 concentrations in the sediment.

show abstract

“…In the lagoon, the plants are juxtaposed forming a mat that hampers light penetration. Another factor probably responsible for light attenuation in Cabiúnas Lagoon is the black-colored water 36 originated from humic substances produced mainly by the decomposition of terrestrial plants from the surrounding sandy soils 49 . The inhibitory effect of light on the activity of methanotrophs has been reported before with increasing light intensities, ranging from a slightly inhibitory effect with low intensities (4.1 to 21 µmol photons m -2 s -1 ) to a complete inhibition with higher intensities (57 to 760 µmol photons m -2 s -1 ) 50,51 .…”

Section: Discussionmentioning

confidence: 99%

Floating Aquatic Macrophytes Decrease the Methane Concentration in the Water Column of a Tropical Coastal Lagoon: Implications for Methane Oxidation and Emission

Fonseca

Marinho

Esteves

2017

Braz. arch. biol. technol.

View full text Add to dashboard Cite

show abstract

Methanogenesis in an impacted and two dystrophic coastal lagoons (Macaé, Brazil)

Abstract: ABSTRACT

Cited by 12 publications

References 12 publications

Organic matter composition in the sediment of three Brazilian coastal lagoons: district of Macaé, Rio de Janeiro (Brazil)

Organic matter composition in the sediment of three Brazilian coastal lagoons: district of Macaé, Rio de Janeiro (Brazil)

Methane levels in shallow subtropical lake sediments: Dependence on the trophic status of the lake and allochthonous input

Floating Aquatic Macrophytes Decrease the Methane Concentration in the Water Column of a Tropical Coastal Lagoon: Implications for Methane Oxidation and Emission

Contact Info

Product

Resources

About