Environmental factors and management practices controlling oxygen dynamics in agricultural irrigation ponds in a semiarid Mediterranean region: Implications for pond agricultural functions

2007 ◽  
Vol 41 (6) ◽  
pp. 1225-1234 ◽  
Author(s):  
Santiago Bonachela ◽  
Rodrigo A. Acuña ◽  
Jesús Casas
Keyword(s):  
Environmental Factors ◽  
Mediterranean Region ◽  
Management Practices ◽  
Agricultural Irrigation ◽  
Oxygen Dynamics

scholarly journals Research on the Relationship between Shared Leadership and Individual Creativity-Qualitative Comparative Analysis on the Basis of Clear Set

2021 ◽  
Vol 13 (10) ◽  
pp. 5445
Author(s):  
Muyun Sun ◽  
Jigan Wang ◽  
Ting Wen
Keyword(s):  
Comparative Analysis ◽  
Environmental Factors ◽  
Shared Leadership ◽  
Management Practices ◽  
Qualitative Comparative Analysis ◽  
Necessary Condition ◽  
The Individual ◽  
The Impact ◽  
The Relationship ◽  
Sufficient And Necessary Condition

Creativity is the key to obtaining and maintaining competitiveness of modern organizations, and it has attracted much attention from academic circles and management practices. Shared leadership is believed to effectively influence team output. However, research on the impact of individual creativity is still in its infancy. This study adopts the qualitative comparative analysis method, taking 1584 individuals as the research objects, underpinned by a questionnaire-based survey. It investigates the influence of the team’s shared leadership network elements and organizational environmental factors on the individual creativity. We have found that there are six combination of conditions of shared leadership and organizational environmental factors constituting sufficient combination of conditions to increase or decrease individual creativity. Moreover, we have noticed that the low network density of shared leadership is a sufficient and necessary condition of reducing individual creativity. Our results also provide management suggestions for practical activities during the team management.

scholarly journals Akdeniz İklim Koşullarında Seralarda Havalandırma Açıklık Oranlarının Belirlenmesi

2017 ◽  
Vol 5 (4) ◽  
pp. 409
Author(s):  
Abdullah Nafi Baytorun ◽  
Sait Üstün ◽  
Adil Akyüz ◽  
Derya Önder
Keyword(s):  
Energy Balance ◽  
Environmental Factors ◽  
Temperature Difference ◽  
Mediterranean Region ◽  
Bernoulli Equation ◽  
Outdoor Temperature ◽  
Optimal Point ◽  
Air Ventilation ◽  
Roof Area ◽  
The Mediterranean

Ventilation is one of the methods used to obtain the biological optimal point of environmental factors needed for the plants in greenhouses. In the greenhouses, air change coefficient must be more than 50 h-1 in order to supply effective air ventilation. Temperature differences like air change coefficient can be regarded as a criterion to determine efficiency of ventilation in the greenhouses. In this study, the temperature values were calculated by using energy balance and Bernoulli equation at different ventilation opening ratios (AV/AG) depending on climatic properties in the Mediterranean region (Antalya). If was found that, based on temperature and radiation values of Antalya province, 20% ventilation opening rate is sufficient in the roof area. A temperature difference (∆T) of 1K can be achieved with a 50% shading of radiation and a 20% ventilation opening in June in the Mediterranean region. However, additional cooling is necessary in the greenhouses around noon hours because outdoor temperature is greater than 30°C.

THE LIFE CYCLE AND SOCIAL LEVEL OF EVYLAEUS NIGRIPES (HYMENOPTERA: HALICTINAE), A MEDITERRANEAN HALICTINE BEE

1970 ◽  
Vol 102 (2) ◽  
pp. 185-196 ◽  
Author(s):  
G. Knerer ◽  
C. Plateaux-Quénu
Keyword(s):  
Life Cycle ◽  
Environmental Factors ◽  
Mediterranean Region ◽  
Cell Cluster ◽  
Caste Determination ◽  
The Social ◽  
The Mediterranean ◽  
Social Level

AbstractEvylaeus nigripes (Lep.) is a large, polylectic social halictine bee, common in the Mediterranean region. Haplometrotic and pleometrotic nests are established late in spring and clusters of from 6 to 15 cells are constructed and surrounded by a cavity. A summer brood of small females and a few males emerges from these cells in July. The summer females behave as workers; they remain in their mother’s nest, assist in the construction of a deeper and larger cell cluster, forage for pollen and nectar, but do not guard the nest. They show some ovarian inhibition in a matrifilial society but become egglayers in queenless nests or when establishing their own burrows. They are much shorter-lived than their mothers, require no diapause, and are unattractive to the summer males. The social level of E. nigripes is comparatively high; summer males are less than 5% of the total brood. Queen and workers are relatively distinct morphs, although caste determination can be influenced by environmental factors. Sphecodes alternatus Smith is its specific parasitoid whereas several bombyliids, mutillids, and conopids attack E. nigripes as part of a much wider range of hosts.

scholarly journals Modelling Mediterranean agro-ecosystems by including agricultural trees in the LPJmL model

2015 ◽  
Vol 8 (6) ◽  
pp. 4997-5040 ◽  
Author(s):  
M. Fader ◽  
W. von Bloh ◽  
S. Shi ◽  
A. Bondeau ◽  
W. Cramer
Keyword(s):  
Land Use ◽  
Mediterranean Region ◽  
Management Practices ◽  
Climate Change Impacts ◽  
Biodiversity Loss ◽  
Ecosystem Model ◽  
The Mediterranean ◽  
Olive Trees ◽  
Agricultural Yields ◽  
Fodder Grasses

Abstract. Climate and land use change in the Mediterranean region is expected to affect natural and agricultural ecosystems by decreases in precipitation, increases in temperature as well as biodiversity loss and anthropogenic degradation of natural resources. Demographic growth in the Eastern and Southern shores will require increases in food production and put additional pressure on agro-ecosystems and water resources. Coping with these challenges requires informed decisions that, in turn, require assessments by means of a comprehensive agro-ecosystem and hydrological model. This study presents the inclusion of 10 Mediterranean agricultural plants, mainly perennial crops, in an agro-ecosystem model (LPJmL): nut trees, date palms, citrus trees, orchards, olive trees, grapes, cotton, potatoes, vegetables and fodder grasses. The model was successfully tested in three model outputs: agricultural yields, irrigation requirements and soil carbon density. With the development presented in this study, LPJmL is now able to simulate in good detail and mechanistically the functioning of Mediterranean agriculture with a comprehensive representation of ecophysiological processes for all vegetation types (natural and agricultural) and in a consistent framework that produces estimates of carbon, agricultural and hydrological variables for the entire Mediterranean basin. This development pave the way for further model extensions aiming at the representation of alternative agro-ecosystems (e.g. agroforestry), and opens the door for a large number of applications in the Mediterranean region, for example assessments on the consequences of land use transitions, the influence of management practices and climate change impacts.

scholarly journals The genus Albinaria Vest, 1867 (Gastropoda, Pulmonata, Clausiliidae), part II: Albania, Greece, Turkey and Lebanon (except the islands)

2019 ◽  
Vol 2 ◽  
Author(s):  
Ignazio Sparacio ◽  
Paolo Crovato ◽  
Fabio Liberto ◽  
Agatino Reitano ◽  
Mariestella Colomba
Keyword(s):  
Environmental Factors ◽  
Mediterranean Region ◽  
Eastern Mediterranean ◽  
Eastern Mediterranean Region ◽  
Geographic Isolation ◽  
Check List

The genus Albinaria Vest, 1864 (Gastropoda, Pulmonata, Clausiliidae) live on limestone rocks and show a remarkable diversity in the eastern Mediterranean region. This is mainly caused by the tendency of these populations to split up into local forms with highly restricted areas of distribution. This phenomenon is also furthered by geological and environmental factors and, often, by geographic isolation. In this work, we present further results on our studies on the genus Albinaria. An updated check-list of the populations coming from Albania, Greece, Turkey and Lebanon (except the islands) is provided and most of these populations are illustrated.

scholarly journals Prediction of vine vigor and precocity using data and knowledge-based fuzzy inference systems

OENO One ◽  
2012 ◽  
Vol 46 (3) ◽  
pp. 185 ◽  
Author(s):  
Cécile Coulon-Leroy ◽  
Brigitte Charnomordic ◽  
Dominique Rioux ◽  
Marie Thiollet-Scholtus ◽  
Serge Guillaume
Keyword(s):  
Expert System ◽  
Environmental Factors ◽  
Management Practices ◽  
Fuzzy Inference ◽  
Cultural Practices ◽  
Expert Knowledge ◽  
Scientific Evidence ◽  
Parent Rock ◽  
New Approach ◽  
Continuous Estimation

<p style="text-align: justify;"><strong>Aims</strong>: The evolution of the economic and environmental context (low-input management practices, increase of energy cost and climate change) requires adaptation and/or optimization of winegrower’s practices in order to elaborate competitive and yet still qualitative wines. To adapt and sustain their practices at the plot scale (<em>e.g.</em>, rootstock selection or plantation density), winegrowers and viticultural consultants need indicators to predict vine development based on permanent environmental factors (soil, parent rock and landscape). As of today, such indicators are either nonexistent or too basic. The aim of this work is to develop operational and useful indicators based on strong scientific evidence.</p><p style="text-align: justify;"><strong>Methods and results</strong>: This paper proposes a new approach based on a computer model composed of a cascade of fuzzy expert systems to estimate the two variables that best characterize vine development: vigor (VIG) and precocity (PRE). This model combines pedological expertise and data analysis. Based on scientific literature, and in particular on a previous expert system using analytical equations (Morlat <em>et al.</em>, 2001), the new approach allows a continuous estimation of VIG and PRE imparted by soil, parent rock and landscape. Further, it avoids the drawbacks of the previous expert system, due to the use of traditional crisp partitions for continuous input variables. Another novel aspect is the parameter setting, which efficiently combines expert knowledge and data mining. Finally, the method is tuned and validated against two different databases.</p><p style="text-align: justify;"><strong>Conclusion</strong>: VIG and PRE imparted by environmental factors can now be evaluated more efficiently than with the former methods. The new method eliminates the need for post-evaluation correction by experts, which saves time. It also allows a continuous estimation of these variables. Each step can be controlled and analyzed during the design. Finally, the method is generic in the sense that the reasoning used to represent the relations between variables is not restricted to a given area. It can easily be customized and adapted to new areas by adjusting the parameters using local pedological knowledge and data.</p><p style="text-align: justify;"><strong>Significance and impact of the study</strong>: This work answers the significant problem of VIG and PRE assessment according to environmental factors, which is a prerequisite in order to best adapt long-term cultural practices.</p>

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