Some Ecological Factors Affecting Bird Life in the Region of the North-west Bend of the Murray River, S. A.

1952 ◽  
Vol 52 (4) ◽  
pp. 296-300 ◽  
Author(s):  
E. F. Boehm
Keyword(s):  
Ecological Factors ◽  
Factors Affecting ◽  
North West ◽  
The North ◽  
Murray River

scholarly journals Etude Eco-Dendrométrique Du Dépérissement Du Cèdre De l’Atlas Dans Le Parc National De Theniet El Had “Algérie”

2016 ◽  
Vol 12 (29) ◽  
pp. 112
Author(s):  
Taleb Mohamed Lamine ◽  
Maatoug M’hamed ◽  
Azouzi Blel ◽  
Zedek Mohamed ◽  
Hellal Benchabane
Keyword(s):  
Analysis Of Variance ◽  
National Park ◽  
Ecological Factors ◽  
Management Plan ◽  
Ecological Data ◽  
Descriptive Data ◽  
North West ◽  
The North ◽  
The Relationship

This study aims to search the relationship between the decline of the Atlas cedar and the eco-dendrometrique factors in the National Park of Theniet El Had located in the north-west of Algeria. This study takes place throughout 30 circular plots of 1.000m2 area in which, a dendrometric measures and ecological data are taken in addition to descriptive data for Atlas cedar trees. The descriptive data shows that 34% of inventoried Atlas cedar have damaged leaves and 30% have more then 25% of their crowns damaged. The analysis of variance shows that there is no relationship between the rate of the Atlas cedar decline ant the ecological factors, components of the soil and dendrometric parameters except for the average circumference witch is influenced by the competition between trees. Therefor, a particular management plan for the regulation of competition is a necessity for this park.

La végétation forestière du secteur nord-ouest de la vallée du Saint-Laurent, Québec

1988 ◽  
Vol 66 (4) ◽  
pp. 793-804 ◽  
Author(s):  
Claude St-Jacques ◽  
Daniel Gagnon
Keyword(s):  
Acer Saccharum ◽  
Acer Rubrum ◽  
Ecological Factors ◽  
Detrended Correspondence Analysis ◽  
Forest Community ◽  
North West ◽  
The North ◽  
Two Factors ◽  
Community Types ◽  
And Cluster Analysis

The forest vegetation of the north-west section of the St. Lawrence Valley in Quebec was sampled within 68 quadrats. The location of the quadrats was selected by means of a stratified random sampling plan. Ordination (detrended correspondence analysis) and cluster analysis (TWINSPAN) allowed the identification of 11 forest community types. The ecological factors most closely associated with the distribution of these communities are soil drainage and richness. These two factors are strongly related to the types of surface deposits. Communities dominated by Acer saccharum are found on well drained and nutrient-rich moraines. On the contrary, communities dominated by Acer rubrum and the majority of coniferous forests are found on poorly drained and nutrient-poor soils. Two floristically distinct community types, the Fraxinus – Tilia americana forests and the Tsuga canadensis – Acer saccharum forests, are found on poorly drained marine deposits with edaphically identical lower horizons. However, the pH and major cation concentrations of the upper soil horizons are much lower under the cover of the hemlock forests than under the cover of the ash – basswood forests.

scholarly journals Factors Affecting e-Government Adoption by Dairy Farmers: A Case Study in the North-West of Spain

2021 ◽  
Vol 13 (8) ◽  
pp. 206
Author(s):  
Alba Vázquez-López ◽  
Manuel Marey-Perez
Keyword(s):  
National Level ◽  
Electronic Government ◽  
Web Pages ◽  
Dairy Farmers ◽  
Factors Affecting ◽  
North West ◽  
Face To Face ◽  
The North ◽  
The Government

With the objective of assessing the farmers’ situation regarding the use of the ICT and their relations with the electronic government, a case study consisting in the realization of 34 face-to-face surveys was conducted between February and March 2020 in dairy farms in the region of Galicia (Spain). The sample was selected according to one of the most important online journals in the farming sector at a national level. From the census, we chose those farms considered most representative taking into account the main criteria: the level of PAC (Common Agrarian Politics) subsidies and milk production (litres/cow and year). The results show that the majority of the farmers used the internet, but on many an occasion, they were discontented in relation to the poor connection quality in their farms. In regard to the use of the electronic government for procedures related to their farms, many of them were able to perform them through the government website; however, there were procedures which the users defined as “complex” and which had to be outsourced to authorised entities. The results also show that the farmers do want to employ the e-government, mainly because of the time and cost saving; however, the current web pages do not meet the users’ expectations. Finally, this situation, applied to a region placed among the 10 most productive regions of milk, is comparable to what happens in other regions.

scholarly journals Motivational factors affecting informal women entrepreneurs in North-West Province

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
Sanchen Henning ◽  
Kabira Akoob
Keyword(s):  
Women Entrepreneurs ◽  
Principal Component ◽  
Motivational Factors ◽  
Formal Sector ◽  
Factors Affecting ◽  
North West ◽  
Rural Villages ◽  
The North ◽  
Entrepreneurial Spirit ◽  
The Government

Background: Informal women entrepreneurs in the rural villages of North-West strive to progress from poverty to prosperity. There is a growing appreciation that the conditions that support women’s ability to start and grow ventures may be different from those that help men and therefore there is a need to examine the motivational factors affecting women’s enterprise development.Aim: The study aimed to identify the motivational factors of women in the Mahikeng area to start informal enterprises, the barriers they experience and their developmental business needs.Setting: The study focussed on informal women entrepreneurs in the rural villages of Mahikeng in the North-West province.Methods: In total, 80 face-to-face questionnaires were completed with women entrepreneurs. A principal component analysis of 15 items of the total questionnaire was performed on the data to determine which items could be reduced and transformed into new components.Results: ‘Destitute conditions’, ‘Entrepreneurial Spirit’ and ‘Passion for Product’ emerged as the three underlying motivational factors. The component ‘Destitute conditions’ was ranked as the most important reason for starting an informal business. The need to transcend impoverished conditions (a push factor) and the need for self-determination (a pull factor) were almost equally strong amongst the 80 participants. ‘Lack of financial and business skills’ was ranked as the biggest obstacle to keeping the business running. Ninety-one per cent of the women entrepreneurs reported that they had never received any training from the government or the private sector.Conclusions: Access to basic infrastructure, training, funding and business networks will enable self-efficacy behaviour of women entrepreneurs in the Mahikeng district to move beyond poverty. Recommendations included the establishment of a regional database of informal women entrepreneurs, the improvement of basic facilities and infrastructure and access to microloans as well as training by the formal sector.

A Biogeographical Analysis of the Tasmanian Endemic Ptunarra Brown Butterfly, Oreixenica ptunarra Couchman (Lepidoptera : Nymphalidae : Satyrinae)

1997 ◽  
Vol 45 (1) ◽  
pp. 21 ◽  
Author(s):  
P. B. McQuillan ◽  
C. J. Ek
Keyword(s):  
Male Genitalia ◽  
Species Conservation ◽  
Ecological Factors ◽  
Morphological Characters ◽  
Climatic Conditions ◽  
Conservation Strategies ◽  
North West ◽  
Phenotypic Characters ◽  
The North ◽  
Tasmanian Endemic

Considerable geographic variation occurs in the Tasmanian endemic butterfly, Oreixenica ptunarra, and there is a high correlation between clusters of morphological characters and ecological factors, especially climate and elevation. Evidence is presented for the existence of a longitudinal cline in phenotypic characters of wing pattern and size, which is unrelated to the modest amount of variation in the male genitalia (a possible surrogate for genetic variability). Butterflies from warmer, less cloudy eastern Tasmania are larger and less dark in colour than those from the west, culminating in the small dark populations of the north-west. This suggests selection for efficiency in thermoregulation as climatic conditions become more marginal for adult activity from east to west. The prevailing subspecies classification does not fully reflect the range of variation in this species. Conservation strategies that aim to guarantee the survival of the collective phenotype of O. ptunarra based on this taxonomy are therefore misinformed. The north-west populations are disjunct geographically and in features of phenotype, but are not especially discrete in the morphology of the male genitalia. We propose that the subspecies angeli Couchman and roonina Couchman be reduced to synonymy with nominotypical ptunarra Couchman, and a new subspecies should be recognised to incorporate populations from the montane grasslands of north-western Tasmania.

scholarly journals When to count? Indices of population size for mountain hares of the north-west Lammermuir Hills, Scotland

2020 ◽  
Vol 27 (3) ◽  
Author(s):  
G.W. Pettigrew
Keyword(s):  
Population Size ◽  
Activity Patterns ◽  
Reproductive Behaviour ◽  
Camera Trap ◽  
Coat Colour ◽  
Diel Activity ◽  
Red Grouse ◽  
Factors Affecting ◽  
North West ◽  
The North

Surveys with binoculars at two different times of day and in various months of the year, along with camera trap studies of diel activity patterns, were used to inform an appropriate period to count mountain hares ( Lepus timidus) on managed red grouse (Lagopus lagopus ) moorland of the Lammermuir Hills, south-east Scotland. Factors affecting the numbers of hares counted were time relative to sunrise, the presence of winter coat colour and reproductive behaviour in spring. Counts of hares in March and April starting one hour before dawn were used as an index of population size of the mountain hare over three years of observations on three hill-tops, with densities of 23-33 hares km-2. The number of hares seen was stable or rose slightly over the three years despite a partial cull on one of the hills. In support of suitability of the timing of surveys used, camera trap studies revealed that the period around dawn in March and April was associated with high levels of hare activity.

scholarly journals GIS-based DRASTIC and composite DRASTIC indices for assessing groundwater vulnerability in the Baghin aquifer, Kerman, Iran

2020 ◽  
Vol 20 (8) ◽  
pp. 2351-2363
Author(s):  
Mohammad Malakootian ◽  
Majid Nozari
Keyword(s):  
Hydraulic Conductivity ◽  
Vadose Zone ◽  
Groundwater Vulnerability ◽  
Aquifer Vulnerability ◽  
Factors Affecting ◽  
North West ◽  
The North ◽  
Soil Media ◽  
Sensibility Analysis ◽  
The Impact

Abstract. The present study estimates the Kerman–Baghin aquifer vulnerability using DRASTIC and composite DRASTIC (CDRASTIC) indices with the aid of geographic information system (GIS) techniques. Factors affecting the transfer of contamination, including water table depth, soil media, aquifer media, the impact of the vadose zone, topography, hydraulic conductivity, and land use, were used to calculate the DRASTIC and CDRASTIC indices. A sensitivity test was also performed to determine the sensitivity of the parameters. Results showed that the topographic layer displays a gentle slope in the aquifer. Most of the aquifer was covered with irrigated field crops and grassland with a moderate vegetation cover. In addition, the aquifer vulnerability maps indicated very similar results, identifying the north-west parts of the aquifer as areas with high to very high vulnerability. The map removal sensibility analysis (MRSA) revealed the impact of the vadose zone (in the DRASTIC index) and hydraulic conductivity (in the CDRASTIC index) as the most important parameters in vulnerability evaluation. In both indices, the single-parameter sensibility analysis (SPSA) demonstrated net recharge as the most effective factor in vulnerability estimation. According to the results, parts of the studied aquifer have a high vulnerability and require protective measures.

The degradation of archaeological bronzes underground: evidence from museum collections

Antiquity ◽  
2004 ◽  
Vol 78 (300) ◽  
pp. 380-390 ◽  
Author(s):  
Inga Ullén ◽  
Anders G. Nord ◽  
Monica Fjaestad ◽  
Einar Mattsson ◽  
Gunnar Ch. Borg ◽  
...  
Keyword(s):  
Environmental Factors ◽  
West Coast ◽  
Museum Collections ◽  
Factors Affecting ◽  
North West ◽  
The North ◽  
Factors Influencing ◽  
Interdisciplinary Project ◽  
National Heritage ◽  
Burial Rite

This interdisciplinary project, initiated by the National Heritage Board in Sweden, was undertaken to determine the environmental factors affecting the deterioration of archaeological bronzes in Scandinavia – while they still lie underground. The possible influence of soil acidification was obviously of special interest. The method was to examine 3200 prehistoric bronze artefacts from different museum collections in Sweden and Norway and compare the condition of specimens dug up in different areas at different times. The results showed that the condition of excavated bronzes had greatly deteriorated during the last 50–60 years, particularly along the North West Coast of Sweden, where the soil is very sensitive to pollutants. The archaeological context, e.g. the burial rite, was also among the factors influencing the preservation of the artefacts.

Euphausiid assemblages of the oceanographically complex north-west marine bioregion of Australia

2017 ◽  
Vol 68 (11) ◽  
pp. 1988 ◽  
Author(s):  
Alicia L. Sutton ◽  
Lynnath E. Beckley
Keyword(s):  
Species Richness ◽  
Water Column ◽  
Food Availability ◽  
Marine Protected Areas ◽  
New Records ◽  
Abundant Species ◽  
Factors Affecting ◽  
North West ◽  
The North ◽  
Tropical Biodiversity

The north-west marine bioregion of Australia, which includes the waters adjacent to the Kimberley and Ningaloo coasts, is influenced by both the Indian and Pacific oceans and has high tropical biodiversity, some of which is conserved in a suite of Marine Protected Areas. In the present study, the epipelagic euphausiid assemblages of this bioregion were investigated and related to the physical and biogeochemical properties of the water column, as well as food availability. Twenty-five euphausiid species were identified, including three new records for Australian waters. Pseudeuphausia latifrons was the most abundant species, dominating the shelf waters across both study areas. Stylocheiron carinatum replaced P. latifrons in the deeper waters where species richness was greater. Off Ningaloo, there were higher concentrations of euphausiids, and this may be linked to the bathymetry, the narrowness of the shelf and the resultant effects of these features on oceanography and biogeochemistry. Assemblages were primarily structured by depth, but mean seawater density, dissolved oxygen, fluorescence and mesozooplankton abundance also significantly explained some of the variation in euphausiid assemblages. The present study has confirmed that the physical and biogeochemical properties of the water column and food availability are recurrent factors affecting euphausiid assemblage variation in the eastern Indian Ocean.

scholarly journals An Analysis of Natural Factors Affecting the Dispersal and Establishment of Iron Age III Settlements in the Western Zayandehrand Basin (West and Northwest of Isfahan)

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Masoomeh Dehkordi ◽  
Alamdar Alian
Keyword(s):  
Water Resources ◽  
Iron Age ◽  
Geological Structure ◽  
The West ◽  
Statistical Population ◽  
Factors Affecting ◽  
North West ◽  
The North ◽  
Ancient Times ◽  
Communication Paths

Humans are always lenders to their surroundings which makes it possible to create habitable environments and create habitat patterns that fit the surrounding environment. In this research, settlement patterns of Iron Age III sites in the west and northwest of Isfahan was studied via GIS. The area studied is one of the most important but unknown areas of archaeological research due to its location in the center of the Iranian plateau and a link between the north-west and the south-west of the country. The environmental characteristics of the studied area have attracted the attention of humans since ancient times. Therefore, it was considered necessary to conduct archaeological excavations. To achieve this goal, the area was first studied archaeologically. As a result of this survey, approximately 50 ancient sites were identified which included the statistical population used for analysis. The effect of environmental variables on the distribution of settlements in the study area was investigated including altitude, slope (percentage and direction), climate, geological structure, distances and proximity to water resources, distance to and land use, and the proximity to communication paths. Through analytical-descriptive method, the factors affecting the formation and distribution of the establishment patterns of the period in question was studied. After analyzing the information and maps, the results indicated that among all the factors, three environmental factors were the most important in the formation of ancient settlements of the Iron Age III era in the west and northwest of Isfahan: factors relating to water resources, proximity to communication paths, and slope percentage and direction.

Sign in / Sign up

Export Citation Format

Share Document