نتایج جستجو برای: ریشه گیاه نی phragmites australis

تعداد نتایج: 52689  

2017
Ellen V Crocker Eric B Nelson Bernd Blossey

Interactions between introduced plants and soils they colonize are central to invasive species success in many systems. Belowground biotic and abiotic changes can influence the success of introduced species as well as their native competitors. All plants alter soil properties after colonization but, in the case of many invasive plant species, it is unclear whether the strength and direction of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ملایر - دانشکده منابع طبیعی 1392

از جمله مهم ترین روش های بررسی فلزات سنگین به عنوان آلاینده، استفاده از پایشگر های زیستی است که می توانند به عنوان شاخصی مناسب جهت بیان کیفیت محیط زیست مورد استفاده قرار گیرند. با توجه به نقش گونه های ماکروفیت در پالایش برخی آلاینده های محیطی که تأثیر به سزایی در سلامت محیط زیست منطقه دارند؛ در پژوهش حاضر به منظور بررسی وضعیت آلودگی رودخانه دز شهرستان دزفول و تأثیر گونه های گیاهی غالب موجود در ...

2011
Hui Zhao Huaxiao Yan Congwang Zhang Xiaodong Liu Yanhui Xue Yingyun Qiao Yuanyu Tian Song Qin

The pyrolytic kinetics of Phragmites australis was investigated using thermogravimetric analysis (TGA) method with linear temperature programming process under an inert atmosphere. Kinetic expressions for the degradation rate in devolatilization and combustion steps have been obtained for P. australis with Dollimore method. The values of apparent activation energy, the most probable mechanism f...

2017
Per Milberg Lina Törnqvist Lars M. Westerberg David Bastviken

Methane (CH4) emissions via emergent aquatic macrophytes can contribute substantially to the global CH4 balance. We addressed temporal variability in CH4 flux by using the static chamber approach to quantify fluxes from plots dominated by two species considered to differ in flux transport mechanisms (Phragmites australis, Carex rostrata). Temporal variability in daily mean emissions from early ...

Journal: :Journal of environmental sciences 2009
He Wang Yongfeng Jia

Accumulation of heavy metals from various oxides with adsorbed cadmium by wetland plant Phragmites australis was studied to evaluate the fate of heavy metals in the sediment of constructed wetlands. Hoagland solution was used as nutrition supply, and single metal oxide with adsorbed cadmium was applied as contaminant to study the accumulation characteristics of cadmium and the substrate metals ...

Journal: :Hydrobiologia 2021

Phragmites australis (ssp australis) is an aggressive colony-forming species that displaces emergent vegetation in North America, including native bulrushes (Schoenoplectus sp.) and both invasive cattails (Typha sp.). expansion can alter habitat negatively affect reptiles, amphibians, birds; less known about Phragmites’ utility as fish its impact on communities freshwater coastal wetlands. To a...

Journal: :Nigerian journal of natural products and medicine 2008
C E Johnson F O Oladeinde A M Kinyua R Michelin J M Makinde A A Jaiyesimi W N Mbiti G N Kamau W M Kofi-Tsekpo S Pramanik A Williams A Kennedy Y Bronner K Clarke P Fofonoff D Nemerson

This study was to compare the total phenolic (TP) content in extracts from eleven plant materials collected at different geographical locations in Kenya, Nigeria, and USA. These plants have been selected because the majority of them are highly pigmented, from yellow to purple, and would therefore have economic value in industries for producing antioxidants and surfactants. Two of them were coll...

Journal: :American journal of botany 2014
Kristin Saltonstall Hilda E Castillo Bernd Blossey

PREMISE OF THE STUDY Intraspecific hybridization between native and introduced lineages of a species can increase invasiveness and may lead to the decline of native lineages. The introduction of Eurasian Phragmites australis has caused profound changes to wetland habitats across North America, yet evidence for hybridization between native and introduced Phragmites australis in North America is ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2002
Kristin Saltonstall

Cryptic invasions are a largely unrecognized type of biological invasion that lead to underestimation of the total numbers and impacts of invaders because of the difficulty in detecting them. The distribution and abundance of Phragmites australis in North America has increased dramatically over the past 150 years. This research tests the hypothesis that a non-native strain of Phragmites is resp...

Journal: :iranian journal of oil & gas science and technology 2013
reza behnood bagher anvaripour nematollah jaafarzade haghighi fard masoumeh farasati

in last decades, oil spill pollution has become an important issue of concern due to its serious environmental impacts; therefore, necessary actions should be taken to prevent or reduce these types of pollution and their environmental consequences. natural organic sorbents are emerging as proper choices for oil spill cleanup due to their availability, eco-friendliness, and low cost. in this stu...

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