Palynological and physico‐chemical characterisation of honeys from the north‐west of Santa Cruz (Argentinean Patagonia)

This study addresses the specificities of soils in low-income countries. These infertile soils are characterized by low levels of agricultural productivity and the disappearance of long-term fallow, which is gradually giving way to shorter-term fallow and sedentary agriculture. The overall objective was to assess the physico-chemical characteristics of the soils of the Boukombe watersheds in the north-west of Atacora in Benin. Soil studies of 15 farm sites from which soils were sampled at the [0-20] cm horizon with 30 composite samples and statistical analyzes were performed. The results of particle size analysis showed predominance (68%) of a textural dimorphism with a sandy loam character and a relatively stable structure. The soils are generally acidic (pH ≤ 5), sodium in places and poor in Organic Matter (0.3%), particularly in the plateau. Mountain lands have soils richer in OM (4%), but poor in nitrogen with a content of between [0.02-0.14%], the C / N ratio at 3% lower than 12. The contents nutrients and minerals are accumulated at the bottom of slopes (2.23% carbon, 0.14% nitrogen) and at the top of slopes (14ppm of phosphorus) under Fonio. These soils remain in a fragile state, subjecting them to the process of intense erosion. The degradation, silting up and progressive acidification of soils constitute the main constraints of agricultural production, the solution of which is based on restoring their fertility by rehabilitating dikes and removing silt.

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Climate change and conservation implications for wet meadows in dry Patagonia

Environmental Conservation ◽

10.1017/s037689291300026x ◽

2013 ◽

Vol 41 (2) ◽

pp. 122-131 ◽

Cited By ~ 5

Author(s):

RAMIRO D. CREGO ◽

CLAYTON K. NIELSEN ◽

KARL A. DIDIER

Keyword(s):

Climate Change ◽

Arid Environment ◽

Tierra Del Fuego ◽

Distribution Models ◽

Change Models ◽

North West ◽

Climate Change Effects ◽

The North ◽

Argentinean Patagonia ◽

Precipitation Regimes

SUMMARYClimate change is predicted to be a major threat for biodiversity and, from a conservation prospective, it is important to understand how ecosystems may respond to that change. Predicted climate change effects on the distribution of meadows in the arid and semi-arid Argentinean Patagonia by 2050 were assessed for change trends and areas of desertification vulnerability using species distribution models (SDM) and climate-change models. Four modelling techniques composed an ensemble-forecasting approach. Suitable areas for meadows will decrease by 7.85% by 2050 given predicted changes in climate. However, there were two contrasting trends: severe reduction of suitable areas for meadows in north-west Patagonia and Tierra del Fuego Island, and an expansion of suitable areas for meadows in the south and a small section in the north-west. Meadows in Patagonia will likely be impacted by climate change, probably due to changes in precipitation regimes, and consequently many species that rely on meadows in an arid environment will also be impacted. Given the low level of protection of meadows in Patagonia, such information on meadow distribution and vulnerability to climate change will be important for increasing and improving the network of conservation areas through conservation planning.

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Potential Impacts of Agroforestry on Controlling Soil Degradation by Water Erosion in the Agricultural Lands of Foothills North-West of Dahra (Mostaganem, Algeria)

Proceedings ◽

10.3390/proceedings2019030050 ◽

2020 ◽

Vol 30 (1) ◽

pp. 50 ◽

Cited By ~ 1

Author(s):

Hamadi ◽

Larid ◽

Gómez ◽

Ouabel

Keyword(s):

Water Conservation ◽

Agricultural Soils ◽

Cropping Systems ◽

Plant Cover ◽

Water Erosion ◽

Agroforestry Systems ◽

Sustainable Rural Development ◽

North West ◽

The North ◽

Physico Chemical

Located in the North-West of Algeria, the foothills of Dahra are affected by the problems of water erosion where agricultural soils are under severe degradation due to the mismatch influence between a semi-arid climate and the prevailing cropping systems presenting a threat to sustainable rural development in the region. After a survey on the field, a localization and prioritization of different agroforestry systems (AFS) practiced, an overview bioclimatic and physico-chemical analyzes of soil has been made for comparison between systems. The results show that in the absence of systems with consistent vegetation cover, the foothills soils located on slopes even weak undergoing a harmful human activities have become the prey of rainwater. Given that it doesn't exist at agricultural exploitations level a miracle system for the development and the soils and water management, the association of trees with crops (AFS) allowed in certain situations to improve soils protection, their humidity, their fertility and the socioeconomic situation of farmers. As well, the analysis of statements on the tree resource of agricultural exploitations we has allowed to assess the agroforestry systems efficiency awaited, considering their inappropriate management. As the fight against water erosion is only an aspect of soils and water conservation, the agroforestry considered in its largest sense must contain at the same time, the control of water erosion by a permanent plant cover, the maintaining soils fertility and the biodiversity to ensure a sustainable foothills agriculture which depends on the maintenance of rural populations.

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Water Quality Analysis in Wetlands Freshwater: Common Floodplain of Jijia-Prut Rivers

Revista de Chimie ◽

10.37358/rc.17.3.5500 ◽

2017 ◽

Vol 68 (3) ◽

pp. 553-561 ◽

Cited By ~ 1

Author(s):

Gheorghe Romanescu ◽

Madalina Pascal ◽

Alin Mihu Pintilie ◽

Cristian Constantin Stoleriu ◽

Ion Sandu ◽

...

Keyword(s):

Water Quality ◽

Water Quality Index ◽

Quality Index ◽

Quality Analysis ◽

Anthropogenic Pressure ◽

Catchment Basin ◽

North West ◽

The North ◽

Physico Chemical ◽

Freshwater Habitats

Water resources in the Jijia catchment basin are limited and often polluted. The catchment basin of Jijia is situated in northeastern Romania and it crosses the Moldavian Plain on the north-west-south-east direction. The purpose of the present study is to analyze 26 physico-chemical parameters providing the annual and multiannual water quality index. Two water-sampling points were selected: Jijia-Victoria [S.1] and Jijia-Opriseni [S.2]. The high values of nitrates are caused by the use of nitrogen-based chemical fertilizers and of manure. Contamination with nitrites (N-NO2-) and nitrates (N-NO3-) of wetlands and deepwater habitats in the floodplain of Jijia is still high because of agricultural and zootechnical activities. The phosphorus within freshwater habitats is a consequence of anthropogenic pressure: improper storage of animal waste and/or use of phosphates-based fertilizers. Global water quality index (WQi) shows that both monitoring stations are included in the Medium high class.

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Sellaphora mayrii (Bacillariophyceae), a new diatom from the Argentinean Patagonia

Phytotaxa ◽

10.11646/phytotaxa.437.3.2 ◽

2020 ◽

Vol 437 (3) ◽

pp. 135-146

Author(s):

M. LUJÁN GARCÍA ◽

EDUARDO A. MORALES ◽

DAVID G. MANN ◽

NORA I. MAIDANA

Keyword(s):

Electron Microscopy ◽

New Species ◽

Size Range ◽

Central Area ◽

Chemical Characteristics ◽

New Taxon ◽

Santa Cruz ◽

Physico Chemical ◽

Argentinean Patagonia ◽

A New Species

A new species of Sellaphora was found in modern and fossil sediments from shallow-lake Laguna Gemelas Este, Santa Cruz, Argentina. The new taxon was studied with light microscopy and scanning electron microscopy. We present a detailed analysis of its morphology, supporting its placement in the genus Sellaphora Mereschkowsky, and report the physico-chemical characteristics of the lake where it was found. Sellaphora mayrii sp. nov. is most similar to S. smirnovii Chudaev & Gololobova, a small-celled species first reported from Russia. Both species have in common the valve outline, but the new species from Argentina has a wider size range and, when observed with electron microscopy, is visibly different regarding stria pattern, central area, and shape of the areolae.

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Diversity and characteristics of yeasts from water sources in the North West Province, South Africa

Water Science & Technology Water Supply ◽

10.2166/ws.2012.009 ◽

2012 ◽

Vol 12 (4) ◽

pp. 422-430

Author(s):

D. A. B. Van Wyk ◽

C. C. Bezuidenhout ◽

O. H. J. Rhode

Keyword(s):

South Africa ◽

Water Sources ◽

Malt Extract ◽

Chemical Parameters ◽

Candida Spp ◽

North West ◽

The North ◽

Physico Chemical ◽

North West Province ◽

Cryptococcus Spp

Yeasts form an important part of ecosystems. Yeast biodiversity in the North West Province, South Africa, remains largely unexplored. The purpose of this study was to determine the diversity and characteristics of yeasts from water sources in the North West Province. Yeasts were isolated from four rivers and an inland lake. Various parameters were measured to determine the physico-chemical quality of the water. Isolation was done on yeast-malt-extract (YM) agar and identified using biological methods. Physico-chemical parameters were within a target water quality range for various water uses. Yeasts were detected at 22 of the 23 sampling sites. Levels ranged from 3 to 8,680 cfu/L and were broadly divided into pigmented and non-pigmented yeasts. Pigmented yeasts could potentially be an indication of pollution, while non-pigmented yeasts could potentially be pathogenic species. Levels of yeasts could be statistically associated with some physico-chemical parameters. A large percentage of isolated yeasts could grow at temperatures ranging from 4 to 40 °C. Candida spp., Cryptococcus spp., Rhodotorula spp. and Zygosaccharomyces spp. were identified. Our results provide preliminary information on the distribution and diversity of yeasts in water sources in the North West Province.

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Evaluation De L’impact De La Pollution Agricole Sur La Qualite Des Eaux Souterraines De La Nappe Du Gharb

European Scientific Journal ESJ ◽

10.19044/esj.2016.v12n11p509 ◽

2016 ◽

Vol 12 (11) ◽

pp. 509 ◽

Cited By ~ 3

Author(s):

Bouderka Nouzha ◽

Souid Ahmed Kacem ◽

Lakhili Ferdaouss ◽

Lahrach Abrerrahim ◽

Benabdelhadi Mohammed

Keyword(s):

Underground Water ◽

Sodium Potassium ◽

North West ◽

Underground Waters ◽

The North ◽

Physico Chemical ◽

Eaux Souterraines ◽

The Impact ◽

Metallic Contamination

The Gharb plain is located in the North West of Morocco and corresponds to a vast plain of the Sebou watershed. It includes an irrigable perimeter of a 250,000 ha, of which more than 120,000 ha are designed as big hydraulics to meet the drinking water and irrigation needs of the region. The intensification of agriculture in this region leads to a significant use of phytosanitary products, which can impact the physico-chemical quality of the Gharb groundwater. To assess this quality we proceeded to the analysis of the physico-chemical parameters (pH, electric conductivity, dissolved oxygen, chlorides, sodium, potassium, nitrates, ammonium, and orthophosphates) and the study of the metallic contamination of waters of 17 wells located in the region of Sidi Kacem-Sidi Slimane. The results of performed analysis, revealed a pollution of an agricultural origin. This is confirmed by the maximum levels of chlorides, which exceed 2,734 mg/l, thereby explaining the high conductivity levels (5000 μ/cm). Nevertheless, a lithological influence cannot be excluded. The nitrate levels (160 mg/l) indicate a nitric pollution of underground waters. The heavy metals measured showed a metallic contamination exceeding the norms of lead and aluminium concentration, elements which may have their origin in fertilizers undergoing an excessive use in the area. These results confirm the impact of the agricultural intensification in the degradation of the quality of the underground water of the Gharb region.

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Physico-chemical characteristics and therapeutic potential of Chutrun thermal springs in Shigar Valley, Gilgit-Baltistan (Pakistan)

Applied Water Science ◽

10.1007/s13201-020-01354-5 ◽

2021 ◽

Vol 11 (2) ◽

Author(s):

Naima Farhat ◽

Shabbir Hussain ◽

Foqia Faisal ◽

Iqra Batool ◽

Mafia Noreen

Keyword(s):

Hot Springs ◽

Therapeutic Potential ◽

Thermal Springs ◽

Chemical Characteristics ◽

Mineral Contents ◽

North West ◽

The North ◽

Physico Chemical ◽

Shigar Valley ◽

Gilgit Baltistan

AbstractCurrent studies were performed to evaluate the physico-chemical characteristics and therapeutic potential of Chutrun thermal springs located in the North-west of Shigar Valley, Gilgit-Baltistan (Pakistan). Thermal springs with different mineral contents have been used by people for bathing and health purposes since old timings. The mineral water of these springs contains elements like sodium, potassium, calcium, magnesium as chlorides, fluorides, sulphates, phosphates and bicarbonates which may be responsible for cure of various diseases. Chutrun hot springs have 7.21–7.8 pH, 40–42° C Temperature, 300–310 ppm TDS, 3.1–6.7 ppm DO, 278–285 ppm hardness, 1.62–2.42 ppm turbidity, 250–260 ppm alkalinity, 500–516 ppm conductivity, 12–18 ppm sodium, 3.8–4.1 ppm potassium, 80–82 ppm calcium, 20 ppm magnesium, 9.6–12 ppm chlorides, 3.4–3.9 fluorides, 260–282 bicarbonates and 80–85 ppm sulphates. Absence of E.Coli and faecal coliforms indicated that waters from thermal springs are free from organic wastes contaminations. Water from thermal springs of Chutrun was unsuitable for drinking purposes due to the presence of high fluoride content and also small amount of total coliforms which may be due to the presence of environmental bacteria and non-protective measures during sampling but it was found suitable for bathing and other body contact activities.

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Mapping Intrinsic Vulnerability to Pollution Using the DRASTIC Method in the Temara Groundwater (Northwestern Morocco)

International Journal of Agricultural and Environmental Information Systems ◽

10.4018/ijaeis.293753 ◽

2021 ◽

Vol 12 (4) ◽

pp. 1-18

Author(s):

Mariam Taazzouzte ◽

Abdessamad Ghafiri ◽

Hassan Lemacha ◽

Saida El Moutaki ◽

Imane Haidara

Keyword(s):

Treatment Plant ◽

Drinking Water Treatment ◽

Water Treatment Plant ◽

Decision Makers ◽

Soil Slope ◽

Drastic Model ◽

North West ◽

The North ◽

Physico Chemical ◽

Drastic Method

the DRASTIC method was chosen because it can be adapted to different environments and because it combines the seven criteria that directly influence groundwater: depth, recharge, geology, soil, slope, unsaturated zone and conductivity. Located in the North West of Morocco, the Temara aquifer is a very important water resource, but it is overexploited and deteriorated as never before. This issue is of concern to decision-makers in the field of water management. The objective of this work is to create a map of vulnerability to pollution by the Bay of Geographic Information Systems (GIS) and the DRASTIC model. Thus, the highest vulnerabilities are located around the drinking water treatment plant of Ain Atiq, at the mouth of the Bouregreg River and scattered in places throughout the study area. The results of the physico-chemical analysis showed compatibility with the results of the DRASTIC model.

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