نتایج جستجو برای: ecological factors
تعداد نتایج: 1163995 فیلتر نتایج به سال:
abstractthe aim of this study was to determine the ecology of the ostracoda species in the sediments collected from the erdek bay and to observe the relationship between ecological parameters with the number of ostracoda species and individual numbers. sediment and water samples have been collected seasonally from 8 stations of the study area from six different depths (0.3; 1; 5; 10; 20; 30 m)....
Discusses the interaction between socio-economic systems and their natural environment, by examining the indicators of sustainable development. Areas covered by the operationalization of sustainable development indicators; Details on the global nature of environmental problems; Important strategy of the operationalization of sustainable development; Link between economic data and ecological ind...
Abstract Introduction: Environmental factors such as temepertature, humidity and light can affect learning environment and consecuently learning quality. This study aimed to investigate the ecological factors affecting concentration in the classroom from the viewpoints of students of Hormozgan University of Medical Sciences. Methods: This cross-sectional study was conducted on 400 students us...
The present study investigated morph metric characteristics of two populations of Alburnusatr opatenae in two rivers on north western Iran. In addition, the role of important ecological factors influencing morph metric features was studied. Ninety three specimens were collected from the Siminehrood (39) and Zarinerood (54) Rivers using electrocution. The specimens were photographed using a digi...
according to webster and wind (1972) and anderson et al (1987), “organizational buying is a complex process and involves many people from different functional areas, multiple goals and potentially conflicting decision criteria. moreover, the customers of today are also more knowledgeable and selective when making their purchasing decisions. since a key to organizational survival is the retentio...
suitability analysis is a prerequisite for sustainable agricultural production and it involves evaluation of the environmental parameters. the development and creation of appropriate points for this land use without considering environmental capability will result in the appearance of several ecological, economic, and social problems. the multi-criteria decision making (mcdm) models were used f...
Remarkable diversity in recognized endemic centres as well as noteworthy disjunct distributions have led students of the pteridophytes to seek historical explanations for these phenomena. A suite of distinctive attributes limit the array of possible explanations: most biogeographically significant are ( I ) the smaller number of species-range determinants, and (2) the substantial capacity for l...
W. C. SONZOGNI 1" Great Lakes Environmental Research Laboratory National Oceanic and Atmospheric Administration 2300 Washtenaw Avenue Ann Arbor, Michigan 48104 A. ROBERTSON Office of Marine Pollution Assessment National Oceanic and Atmospheric Administration Rockville, Maryland 20852 A. M. BEETON Great Lakes and Marine Waters Center University of Michigan Ann Arbor, Michigan 48109 ABSTRACT / Al...
1CNRS, UMR 7205, Muséum National d’Histoire Naturelle, 45 Rue Buffon, CP50, 75005 Paris, France 2CIBIO/UP—Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Campus Agrário de Vairão, R. Monte-Crasto, 4485-661 Vairão, Portugal 3 IBE—Institut de Biologia Evolutiva (UPF-CSIC), Universitat Pompeu Fabra, PRBB, Avenue Doctor Aiguader N88, 08003 Barcelona, Spain 4Dep...
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