نتایج جستجو برای: diversity and abundance of soil invertebrates
تعداد نتایج: 24082701 فیلتر نتایج به سال:
the present study has tried to accomplish an analysis of margaret atwood’s novels oryx and crake, and the year of the flood in the light of posthuman and cyborg theories. considering posthumanism as a critical reading of some notions of humanism focus of which in this thesis has been identity, new definitions for humanity and human identity are formed. haraway’s cyborg, as one possible new figu...
nowadays,tourism industry considered as one of the main sources of income of a country.unfortunately and despite of owning plenty of cultural historical and natural attractions, iran has not reached to a proper position in this field. besides, the historical cities of a country are considered as the income resource and national wealth of it. qazvin with a rich cultural precedent, have suitable ...
Phytoplankton is one of the most important biological groups in the aquatic environment, and its study and monitoring at different years reveals environmental changes as well as understanding of water quality. The aims of the present study are to study the structural pattern of phytoplankton with emphasis on new distinctive species (especially harmful and toxic), native and favorite species and...
the effects of dominant shrub species on soil organic matter (som), including total soil carbon (sc), total nitrogen (n) and particulate organic matter (pom) were studied in three stands differing in the type of shrub species, i.e. astragalus microcephalus (shrub), pteropyrum aucheri (shrub) and prangus uloptera (non-shrub).the stands were located in arid grasslands of north-western iran. for t...
Quantification of soil biological status, through investigation edaphic communities’ composition, constitutes an important factor for the assessment grassland ecosystems, including their protection. The structure invertebrate communities was investigated five grasslands under different chemical and organic treatments, first time in Romania. In order to accomplish this task, some structural para...
calanoid, cyclopoid, harpacticoid and poecilostomatoid copepods were investigated over the year at five stations in the chabahar bay, oman sea. this area is under the influence of the indian ocean seasonal monsoons. the samples were collected using vertical plankton tows with 100 µm mesh nets. copepods were identified into 20 genera and 59 species. calanoid formed about 15% to 62% and cyclopoid...
abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...
the introduction of acacia saligna in the north nile delta of egypt is causing harmful impacts on the plant diversity. thirty stands were established in both invaded and non-invaded areas. the species abundance and diversity were determined. soil samples were collected and analyzed. the correlation between vegetation and soil variables was investigated. the allelopathic potential of water and m...
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
Peanut is an important oil crop worldwide and shows considerable adaptability but growth and yield are negatively affected by continuous cropping. Soil micro-organisms are efficient bio-indicators of soil quality and plant health and are critical to the sustainability of soil-based ecosystem function and to successful plant growth. In this study, 18S rRNA gene clone library analyses were employ...
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