Assessing land use and landscape factors as determinants of water quality trends in Nyong River basin, Cameroon

Ewane, Ewane Basil

doi:10.1007/s10661-020-08448-2

Cited by 22 publications

(9 citation statements)

References 23 publications

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“…Forest and grassland had a good ability to maintain soil, absorb and retain water, and digest pollutants. For example, Ewane's research showed that forest landscapes could absorb water quality pollutants and improve water quality by increasing forest coverage [6]. In this study, the coastal wetland, taking the seawater, tidal flat, Phragmites australis, Suaeda salsa and Spartina alterniflora as the typical natural wetlands had a significant impact on the WQ indicators:…”

Section: Impact Of Lulc-landscape Types On Wq In Coastal Wetlandsmentioning

confidence: 75%

“…Changes in the landscape pattern will affect a series of ecological factors, such as regional surface runoff, soil conditions, various biogeochemical and physical cycles [4]. Hydrological processes change the concentration of pollutants entering rivers and lakes, and profoundly affect regional hydrochemical characteristics [5,6]. Therefore, in order to strengthen the rational use and effective protection of regional water resources, it is necessary to quantify and analyze relationships between landscape patterns and regional WQ and to better understand regional ecological processes.…”

Section: Introductionmentioning

confidence: 99%

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Correlation Analysis of Landscape Patterns with Surface Water Quality in Yancheng Coastal Wetland, Jiangsu, China

Tian¹,

Li²,

Cao³

et al. 2021

Pol. J. Environ. Stud.

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Quantitatively exploring a relationship between coastal wetland landscape pattern and water quality (WQ) is conducive to providing scientific guidance for the improvement of regional WQ, the prevention of water pollution, and the formulation of regional landscape protection and planning. With the 2019 landscape data and WQ sampling data from the Yancheng Coastal Wetland, five-level WQ sampling points at different scales were established. By applying ecological and statistical analysis methods, correlations between the landscape patterns and WQ indicators in different buffer zones were analyzed. Analysis results showed that: (1) The area of aquafarm, farmland and dry ponds were widely distributed at different scales, and the landscape level index and type level index in different buffer zones were significantly different. (2) There were significant correlations between coastal wetland landscape types and WQ indicators. Total nitrogen, total phosphorus, ammonia nitrogen (NH 4 + -N), WQ indicators showed significant positive correlations with farmland landscapes in 0.5 km, 1 km, 2 km, and 2.5 km buffer zones, and significant negative correlations with tidal flats in 0.5 km-2.5 km buffer zones. The Chemical Oxygen Demand index was significantly correlated with various landscapes in the area.(3) At the landscape level, the landscape level index, which represents the fragmentation and complexity of coastal wetland landscapes, had a significant correlation with water pollution indicators, such as mean patch areas, fractal dimension, landscape shape index, plaque cohesion, contagion index and other indexes. At the level of landscape class, farmland, aquafarm, dry ponds, construction land in artificial

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Section: Impact Of Lulc-landscape Types On Wq In Coastal Wetlandsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Correlation Analysis of Landscape Patterns with Surface Water Quality in Yancheng Coastal Wetland, Jiangsu, China

Tian¹,

Li²,

Cao³

et al. 2021

Pol. J. Environ. Stud.

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“…Stakeholders interested in undertaking Avocado cultivation or promotion need to consider the challenges even though Avocado-based business appears lucrative. For instance, a grower should employ the best farming practices to ensure that Avocado trees will not get infected by pests such as thrips and moth insects [206]. Avocados are also susceptible to various fungal diseases including, anthracnose, Cercospora, root rot, and scab [206].…”

Section: Final Thoughts and Perspectivesmentioning

confidence: 99%

“…For instance, a grower should employ the best farming practices to ensure that Avocado trees will not get infected by pests such as thrips and moth insects [206]. Avocados are also susceptible to various fungal diseases including, anthracnose, Cercospora, root rot, and scab [206].…”

Section: Final Thoughts and Perspectivesmentioning

confidence: 99%

The Avocado (<em>Persea americana</em> Mill.): A Review and Sustainability Perspectives

Bhore¹,

Ochoa²,

Houssari³

et al. 2021

Preprint

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Avocado (Persea americana Mill.) plant fruits are well-known for their high nutritional value, unique test, and healthy oil. It has a history of about 10,000 years. Avocado fruit offers many health benefits, and its production is rapidly increasing. The Food and Agriculture Organization (FAO)’s recent data suggest that the Avocados produced in the world in 2019 was twice that of 2010 (3778010 tons). Avocado’s global Gross Production Value was about 5.812 billion USD in 2018, and it is likely to increase rapidly because of the increasing demand for Avocado fruits. Avocado oil is also used in the cosmetic industry because of its therapeutic properties, and it boosts the economic value of the Avocado industry. Avocado fruits have a rough green-gold skin; however, fruits are called ‘the green gold’ because of their massive global demand in the worldwide market and a lucrative business. The cultivation of Avocado has tremendous potential in increasing the rural economy, rural agriculture-based employment and reducing the poverty rate of growers. On the other hand, the Avocado industry is highly criticised because of deforestation, massive water utilisation, polluting water bodies with insecticides and fertilisers, posing a threat to other plant species, and environmental pollution. However, it doesn’t preclude the importance of Avocado. Cameroon’s average temperature is about 23 °C, which is considered optimal for Avocado propagation and commercial cultivation. Cameroon Association of Active Youths (CAMAAY) want to explore the possibilities of engaging Cameroon youths in Avocado cultivation. This review is aimed to provide an overview of Avocado. The review also highlights Avocado cultivation related issues from one health and sustainability perspective in line with the global goals.

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“…Для оценки баланса углерода в таких сложных регионах, как горы требуются знания об основных границах, характеризующих неоднородность процессов накопления и миграции углерода в пространстве и времени [Гуня и др., 2021; Гуня, Гакаев, 2021; Jakšić et al, Karchegani et al, 2012]. Часто на сложную мозаику экосистемной организации в горах накладывается антропогенная деятельность, еще больше усложняющая картину пространственных вариаций динамики углерода , Ewane, 2020, Joeletal., 2016.…”

Section: Introductionunclassified

Study of landscape structure to estimate carbon balance of mountain ecosystems

Gunya¹,

Гайрабеков²,

Гагаева³

2022

Геология И Геофизика Юга России

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Актуальность работы. Различия в динамике углеродного баланса между горными экосистемами высотных поясов и внутри них огромные. Это обусловлено климатом и рельефом с его с высотными, экспозиционными, субстратными и другими различиями. Точечные измерения углеродного баланса нуждаются в обеспечении репрезентативности экстраполяции измерений. Целью работыявляется выявление ландшафтной структуры на разных уровнях дифференциации для последующей оценки условий баланса углерода. В качестве ключевого участка взяты высокогорные ландшафты на карбоновом трансекте в Чеченской Республике. Методы работы. Основными методами послужили полевое ландшафтное картографирование и профилирование. Были применены также результаты классификации ландшафтного покрова по снимку Sentenel-2, которые были проверены в ходе экспедиционных обследований на местности. При этом использовались методы геоинформационного анализа. Расчеты фитомассы проводились на основе полевых замеров с корреляцией по литературным данным. Результаты работы. Как показали исследования на профиле и на ключевом участке, на сравнительно небольшом расстоянии условия динамики углерода существенно меняются. Это связано с изменениями условий тепловлагообмена, плодородием почв, экзогенными процессами и антропогенной нагрузкой. Картографирование ландшафтной структуры является важным шагом в определении границ разных условий, определяющих динамику углерода. При этом информативной основой ландшафтного картографирования может выступать схема дешифрирования и классификации снимков высокого разрешения. Контрастность в условиях динамики углерода сохраняется на разных уровнях ландшафтной дифференциации: от регионального к локальному. Наиболее контрастными границами динамики углерода на высокогорном участке карбонового полигона Чеченской Республики выступают ландшафтные границы между типами ландшафтов: горно-луговым, горно-лесным, горно-лесолуговым, горно-луговостепным. В горно-лесных широколиственных лесах содержится больше органического углерода в надземном профиле (более 100 т / га), в то время как в горно-степных и горно-луговых ландшафтах накапливается органический углерод в почвах (десятки т / га). Нарушение естественного покрова приводит к снижению интенсивности баланса углерода. Relevance. Differences in the dynamics of the carbon balance between mountain ecosystems of altitudinal belts and within them are enormous. This is due to the climate and topography with its altitudinal, exposure, substrate and other differences. Point measurements of the carbon balance need to ensure that the extrapolation of measurements is representative. The aim of the work is to identify the landscape structure at different levels of differentiation for the subsequent assessment of carbon balance conditions. Alpine landscapes on the carbon transect in the Chechen Republic were taken as a key site. Methods.Field landscape mapping and profiling served as the main methods. The results of the landscape cover classification based on the Sentenel-2 image, which were verified during field surveys, were also applied. At the same time, methods of geoinformation analysis were used. Phytomass calculations were carried out on the basis of field measurements with correlation according to literature data. Results. As studies on the profile and in the key area showed, at a relatively short distance, the conditions of carbon dynamics change significantly. This is due to changes in the conditions of heat and moisture exchange, soil fertility, exogenous processes and anthropogenic load. Mapping landscape structure is an important step in delimiting the different conditions that drive carbon dynamics. At the same time, the scheme for deciphering and classifying high-resolution images can serve as an informative basis for landscape mapping. Contrast under conditions of carbon dynamics persists at different levels of landscape differentiation: from regional to local. The most contrasting boundaries of carbon dynamics in the high-mountain section of the carbon polygon of the Chechen Republic are the landscape boundaries between landscape types: mountain-meadow, mountain-forest, mountain-forest-meadow, mountain-meadow-steppe. Mountain-forest broad-leaved forests contain more organic carbon in the above-ground profile (more than 100 t/ha), while in mountain-steppe and mountain-meadow landscapes organic carbon accumulates in soils (tens of t/ha). Disruption of the natural cover leads to a decrease in the intensity of the carbon balance.

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Assessing land use and landscape factors as determinants of water quality trends in Nyong River basin, Cameroon

Cited by 22 publications

References 23 publications

Correlation Analysis of Landscape Patterns with Surface Water Quality in Yancheng Coastal Wetland, Jiangsu, China

Correlation Analysis of Landscape Patterns with Surface Water Quality in Yancheng Coastal Wetland, Jiangsu, China

The Avocado (<em>Persea americana</em> Mill.): A Review and Sustainability Perspectives

Study of landscape structure to estimate carbon balance of mountain ecosystems

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