نتایج جستجو برای: plant species selection
تعداد نتایج: 1157485 فیلتر نتایج به سال:
In order to obtain an optimum management of natural resources, determination of variables that control plant presence and distribution is needed. In the present research, the relationship between some character plants of drylands and some soil and environmental variables were investigated. After primary survey and selection of main plant species, sampling was done in each vegetation type within...
it is definitely necessary to understand the concept and behavior of causation of life insurance policies and its determinants for insurance managers, regulators, and customers. for insurance managers, the profitability and liquidity of insurers can be increasingly influenced by the number of causation through costs, adverse selection, and cash surrender values. therefore, causation is a materi...
Urban green space is one of the most important components in city management and cities’ development given its social and environmental functions and financial and economic aspects. Different species of plants including trees, shrubs, cover crops and flowers or seasonal plants have specific features in terms of climate-compatible of Tehran and water demand. They also have different roles in mee...
Soil microbes play key roles in ecosystems, yet the impact of their diversity on plant communities is still poorly understood. Here we demonstrate that the diversity of belowground plant-associated soil fungi promotes plant productivity and plant coexistence. Using additive partitioning of biodiversity effects developed in plant biodiversity studies, we demonstrate that this positive relationsh...
The aim of this research was to compare the amounts of existing mineral elements in plant aerial parts, litter and soil ofthree range species (Bromus tomentellus, Psathyrostachys fragilis, Agropyron tauri) in order to investigate the litter effectof species on soil properties of Taleghan rangeland. The measured mineral elements include carbon, nitrogen,phosphorous and potassium. After selection...
Biological invasions can have strong ecological effects on native communities by altering ecosystem functions, species interactions, and community composition. Even though these ecological effects frequently impact the population dynamics and fitness of native species, the evolutionary consequences of biological invasions have received relatively little attention. Here, I show that invasions im...
1. Medicinal and Aromatic Plants – Australia 1.1. Natural Plant Medicines Worldwide A Historical Perspective 1.2. Phytochemicals of Therapeutic Significance 1.3. Nitrogen Containing Compounds (Alkaloids) 2. Australian Plant Evolution 2.1. Australian Medicinal Plant Use 3. Some Useful Australian Medicinal Plants 3.1. Eucalyptus Species 3.2. Melaleuca Species 3.3. Leptospermum Species 3.4. Eremop...
Species extinctions from local communities negatively affect ecosystem functioning. Ecological mechanisms underlying these impacts are well studied, but the role of evolutionary processes is rarely assessed. Using a long-term field experiment, we tested whether natural selection in plant communities increased biodiversity effects on productivity. We re-assembled communities with 8-year co-selec...
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