نتایج جستجو برای: عوامل اکولوژیک ecological factors

تعداد نتایج: 1274853  

2007
Daniel Oliveira Mesquita Laurie J. Vitt

We compare lizard assemblages of Cerrado and Amazonian savannas to test the ecological release hypothesis, which predicts that niche dimensions and abundance should be greater in species inhabiting isolated habitat patches with low species richness (Amazonian savannas and isolated Cerrado patches) when compared with nonisolated areas in central Cerrado with greater species richness. We calculat...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه جامعه المصطفی العالمیه - دانشکده الهیات و معارف اسلامی 1386

این تحقیق با عنوان " پدیده مهاجرت و پیامدهای تربیتی آن" به بررسی علل و انواع مهاجرت و بیان پیامدهای تربیتی آن خواهد پرداخت. در مقدمه، مباحث کلی راجع به پایان نامه چون کلیات طرح تحقیق، مورد بررسی قرار گرفته است. فصل اول عهده دار تبیین مفهوم شناسی و گونه های تربیت و مهاجرت می باشد که در ادامه به انواع مهاجرت نیز اشاره می شود. در فصل دوم، علل مهاجرت تحت عناوینی چون: علل ایدئولوژیک، علل فرهنگی و عل...

2011
Danilo Russo

1. What is ecological zoogeography 2. Ecogeographical “rules” 2.1. Bergmann’s rule 2.2. Allen’s rule 2.3. Rapoport’s rule 3. Distribution of animals: patterns and causal factors 3.1. Species conceptualization and delimitation: their importance for zoogeography 3.2. Patterns of distribution 3.3. Endemisms and relicts 3.4. Abiotic ecological factors influencing species distribution 3.5. Biotic ec...

2015
Wei Liu Jianjun Liu Dongxue Yin Xiaowen Zhao

The quality of traditional Chinese herbal medicine, which plays a very important role in the health system of China, is determined by the active substances produced by the plants. The type, content, and proportion of these substances may vary depending on ecological factors in areas where the plants are grown. Sinopodophyllum hexandrum (Royle) T.S. Ying, an endangered plant species with great m...

Journal: :Trauma, violence & abuse 2009
Rebecca Campbell Emily Dworkin Giannina Cabral

This review examines the psychological impact of adult sexual assault through an ecological theoretical perspective to understand how factors at multiple levels of the social ecology contribute to post-assault sequelae. Using Bronfenbrenner's (1979, 1986, 1995) ecological theory of human development, we examine how individual-level factors (e.g., sociodemographics, biological/genetic factors), ...

Journal: :Collegium antropologicum 2002
S Kukulj K Novak-Laus M Samarzija Z Ivanovi-Herceg M Mehulić

The aim of the study was to determine whether an examined group of asthmatic patients differ significantly from a control group of coronary patients with regard to perception of two groups of etiological factors and their interaction: a) ecological factors, and b) habits and behavior of the patients. The study included 100 patients with bronchial asthma and 102 with coronary disease. A question...

2011
Yunxia Liu Shiwen Jiang Yanxun Liu Rui Wang Xiao Li Zhongshang Yuan Lixia Wang Fuzhong Xue

BACKGROUND Drug-resistant tuberculosis (DR-TB) is a major public health problem caused by various factors. It is essential to systematically investigate the epidemiological and, in particular, the ecological factors of DR-TB for its prevention and control. Studies of the ecological factors can provide information on etiology, and assist in the effective prevention and control of disease. So it ...

Journal: :IOP Conference Series: Earth and Environmental Science 2020

Journal: :Proceedings of National Aviation University 2010

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