Role of Scirpus mariqueter on Methane Emission from an Intertidal Saltmarsh of Yangtze Estuary

Spartina alterniflora Loisel. is one of the most invasive species in the world. However, little is known about the role of artificial mowing in its invasiveness and competiveness. In this work, we studied the effect of mowing on its interspecific interactions with native species Phragmites australis (Cav.) Trin ex Steud of the Yangtze Estuary, China. We calculated their relative neighbor effect (RNE) index, effect of relative crowding (Dr) index, and interaction strength (I) index. The results showed that the RNE of Phragmites australis and Spartina alterniflora was 0.354 and 0.619, respectively, and they have competitive interactions. The mowing treatments can significantly influence the RNE of Phragmites australis and Spartina alterniflora on each other. Concretely, the RNE of Spartina alterniflora in the removal treatments was significantly higher than the value in the controls. But the RNE of Phragmites australis in the removal treatments was significantly lower than the value in the controls. Meanwhile, Dr of the two species on the targets was higher in the removal treatments than that in the controls, and the opposite was for I. We concluded that artificial mowing could promote the invasion of Spartina alterniflora by increasing its competitive performance compared with native species.

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An overview of the role of rumen methanogens in methane emission and its reduction strategies

AFRICAN JOURNAL OF BIOTECHNOLOGY ◽

10.5897/ajb2014.14129 ◽

2015 ◽

Vol 14 (16) ◽

pp. 1427-1438 ◽

Cited By ~ 2

Author(s):

Karri Satyanagalakshmi ◽

Goud Talla Sridhar ◽

S. K. Sirohi

Keyword(s):

Methane Emission ◽

Reduction Strategies

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Shadow economy, institutions and environmental pollution: insights from Africa

World Journal of Science Technology and Sustainable Development ◽

10.1108/wjstsd-12-2020-0105 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Cited By ~ 1

Author(s):

James Temitope Dada ◽

Folorunsho Monsur Ajide ◽

Akinwumi Sharimakin

Keyword(s):

Carbon Dioxide ◽

Nitrous Oxide ◽

Environmental Pollution ◽

Environmental Quality ◽

Methane Emission ◽

Shadow Economy ◽

Institutional Quality ◽

Content Type ◽

Per Capita

PurposeThis study investigates the effect of shadow economy on environmental pollution and the role of institutional quality in moderating the impact in African countries between 1991 and 2015.Design/methodology/approachThe study employs three pollutant variables namely: carbon dioxide emissions per capita, methane emission and nitrous oxide emission as robustness check. Also, battery of methodologies; ordinary least squares, fixed effects and system generalised method of moments are used to drive out the conclusions of this study.FindingsThe findings reveal that shadow economy and institutional quality contribute significantly to environmental pollution in Africa. Further, the interactive effect of shadow economy and institutional quality worsens environmental quality in the region. This reveals that weak institutional quality recorded in the region increases the level of shadow economy, thereby intensifying environmental pollution.Practical implicationsThe study concludes that weak institutional framework in the region reinforces shadow economy and environmental pollution. Hence, findings from this study can help policymakers in the region to better understand the role of institutional quality in reducing shadow economy and environmental pollution.Originality/valueThis study enriches one’s understanding on the role of institutional quality in the relationship between environmental quality and shadow economy in African context. It investigates the direct and indirect impact of institutions and shadow economy on environmental quality. The study also uses three different robust variables to measure environmental pollution (carbon dioxide (CO2) emissions per capita, methane emission and nitrous oxide emission) for sensitivity analysis.

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