نتایج جستجو برای: ecosystems

تعداد نتایج: 45922  

Journal: :Innovations: Technology, Governance, Globalization 2012

Journal: :Frontiers for Young Minds 2023

Mangroves are woody trees that can live on the land or in sea, and they found tropical subtropical coastal regions. Because mangroves along land-ocean boundary, unique plants provide several benefits to nature humans. For example, refuge food for organisms, hurricane protection, water filtration; also promote release of oxygen into atmosphere uptake trapping carbon dioxide, which helps fight ag...

Journal: :iranian journal of toxicology 0
محمدرضا کلباسی mohammad reza kalbassi ph.d. student, department of fisheries, faculty science, tarbiat modares university, noor, iran حمید سالاری جو hamid salari-joo m. sc. student, department of fisheries, faculty marine science, tarbiat modares university, noor, iran علی جوهری ali johari associate professor, department of fisheries, faculty marine science, tarbiat modares university, noor, iran

background: in recent years, silver nanoparticles due to their antimicrobial properties, have formed about 56% of nanoparticles global production. since the released nanoparticles ultimately enter water ecosystems, their maximum toxic effects are magnified in aquatic ecosystems. the aim of this study is to show how salinity can decrease the toxic effects of silver nanoparticles on exposed rainb...

Journal: :محیط زیست طبیعی 0
مریم یعقوب زاده دانشجوی کارشناسی ارشد محیط زیست، دانشکدة منابع طبیعی، دانشگاه تهران افشین دانه کار دانشیار گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران بهمن جباریان امیری استادیار گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران سهراب اشرفی استادیار گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران

sensitive coastal areas are fragile ecosystems affected by geographic features and in the same time settlements were developed around these areas due to their ecological capability. coastal ecosystems due to their countless benefits are very important for protection. hence, this paper attempts to determine the sensitivity of coastal ecosystem to disturbances in hormozgan province. we reviewed 2...

Journal: رستنیها 2012
G. Dehghan G. Zarrini M. Asadi N. Soltani,

In the present study, the cyanobacterial flora of Urmia Lake (NW Iran), one of the largest salt lakes in the world and adjacent rivers is investigated. Urmia Lake comprises different micro-organisms including cyanobacteria which have a major role in aquatic ecosystems. Cyanobacterial samples were collected in 2008–09 from Urmia Lake and its surrounding ecosystems. All samples were cultivated, i...

2010
Ursula Goltz Narges Khakpour Christoph Knieke Lukas Märtin

IT ecosystems systems composed of a large number of distributed, autonomous, cooperating, decentralized, interacting, organically grown, heterogeneous, and continually evolving subsystems are the future system generation. Today’s state of the art does not enable us to develop these systems. Within the NTH Focused Research School for IT Ecosystems, research project AIM deals with methods and too...

Journal: :journal of rangeland science 2013
mohammad hasan jouri mohammad zare diana askarizadeh mona fakhreghazi tina salarian

subalpine ecosystems are highly fragile as compared to biological andenvironmental factors. landslide is one of the ruinous upshots of this ecosystem. one of theimpressionable areas in the cause of natural factor is masoleh watershed in western alborzmt, (iran). in order to landslide hazard zonation, landslide index and frequency ratio methodbased on twelve causative factors such as slope, slop...

ژورنال: بوم شناسی آبزیان 2016

Mangrove forests are coastal ecosystems that found worldwide in tropical and subtropical zones. Oil spill causes damage to these marine ecosystems. The objective of this study is study the oil-degrading bacteria in some mangrove forests that located at Persian Gulf. In this study sediments and plant materials were collected from mangrove forests at Persian Gulf (Minab and Khamir ports). Oil-deg...

2017
Alicia García Holgado Francisco J. García-Peñalvo

The definition and development of learning ecosystems is a complex process with a wide range of requirements. Although two different institutions or companies share the same problems and goals regarding their learning and training processes, the learning ecosystems to support them are different. The components of the ecosystem, including the human factor as a key element, and the relationships ...

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