نتایج جستجو برای: especially wetlands had been increased but still social consideration level toward wetland importance

تعداد نتایج: 6013824  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه دریانوردی و علوم دریایی چابهار - دانشکده مدیریت 1393

within communicative, interactive, and learner-centered framework of language teaching and learning, students need to learn four skills of listening, speaking, reading, and writing for their educational success. but of all the language skills, reading enjoys a paramount significance in so many second or foreign language academic contexts. in spite of its importance, language learners still have...

2017
Elizabeth Burke Watson Alejandro Hinojosa-Corona

Although saline tidal wetlands cover less than a fraction of one percent of the earth's surface (~0.01%), they efficiently sequester organic carbon due to high rates of primary production coupled with surfaces that aggrade in response to sea level rise. Here, we report on multi-decadal changes (1972-2008) in the extent of tidal marshes and mangroves, and characterize soil carbon density and sou...

2004
JA Dini

South Africa has begun developing a wetland inventory program, coordinated on a national scale and employing a standardised methodology and classification system. In order to facilitate the mapping phase of the inventory and enhance the value of data gathered, a classification system for South Africa’s wetlands has been developed. This is based on the Cowardin system used by the United States N...

Journal: :Ecological applications : a publication of the Ecological Society of America 2008
Finn C Pillsbury James R Miller

Urbanization has been cited as an important factor in worldwide amphibian declines, and although recent work has illustrated the important influence of broad-scale ecological patterns and processes on amphibian populations, little is known about the factors structuring amphibian communities in urban landscapes. We therefore examined amphibian community responses to wetland habitat availability ...

Journal: :Journal of environmental management 2012
Anna Hansson Eja Pedersen Stefan E B Weisner

Eutrophication of the Baltic Sea has in Sweden led to the initiation of government schemes aiming to increase wetland areas in agricultural regions and thereby reduce nutrient transport to the sea. Landowners play a significant role as providers of this ecosystem service and are currently offered subsidies to cover their costs for constructing and maintaining wetlands. We undertook a grounded t...

2017
Xu Pan Yunmei Ping Lijuan Cui Wei Li Xiaodong Zhang Jian Zhou Fei-Hai Yu Andreas Prinzing

Plant litter is an indispensable component of constructed wetlands, but how the submergence of plant litter affects their ecosystem functions and services, such as water purification, is still unclear. Moreover, it is also unclear whether the effects of plant litter submergence depend on other factors such as the duration of litter submergence, water source or litter species identity. Here we c...

2008
Bernadette P. Walter

Methane is one of the important greenhouse gases and plays an important role in atmospheric chemistry. Its contribution to the current greenhouse effect is about 22%. Since the beginning of the industrialization the atmospheric methane concentration has increased by a factor of 2.5. This increase continues until present, however, since the early 1990s the growth rate has decreased. Superimposed...

In this study, the recreational value of ShirinSou Wetland of the Kabodarahang County in Hamadan Province, Iran was estimated and the visitors' willingness to Pay (WTP) was measured by using Contingent Valuation Method (CVM) and One and One Half Bound model (OOHB) dichotomous choice (DC) questionnaire. The results show that 81 percent of investigating individuals will pay for recreational usage...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1389

the quest for power has formed much of the world history especially in 20th and 21st centuries. oil (energy) particularly after industrial revolution has been a tool for conquest and power and has been transformed to a geopolitical issue. from a geopolitical point of view this has been the case for the last two centuries in central asia and caucasus. central asia and caucasus has always been...

2017
Son V Nghiem Cinzia Zuffada Rashmi Shah Clara Chew Stephen T Lowe Anthony J Mannucci Estel Cardellach G Robert Brakenridge Gary Geller Ake Rosenqvist

Information about wetland dynamics remains a major missing gap in characterizing, understanding, and projecting changes in atmospheric methane and terrestrial water storage. A review of current satellite methods to delineate and monitor wetland change shows some recent advances, but much improved sensing technologies are still needed for wetland mapping, not only to provide more accurate global...

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