scholarly journals HE HARMFUL OF THE HYDROELECTRIC DAMS IN MEKONG RIVER UPSTREAM ON THE ECOSYSTEMS AND LIVELIHOODS IN THE MEKONG DELTA, VIETNAMS

2020 ◽  
Vol 5 (1) ◽  
pp. 35-45
Author(s):  
Ba Le Huy ◽  
Hung Le ◽  
Hoan Nguyen Xuan
Keyword(s):  
Climate Change ◽  
Mekong Delta ◽  
Aquatic Organisms ◽  
Hydroelectric Dams ◽  
Acid Sulfate Soil ◽  
The Past ◽  
The People ◽  
Large Water ◽  
The Impact ◽  
Very High

The hydro-electric of the upstream Mekong (China) has been and will greatly impact on the down-stream areas, in which the Mekong Delta (Viet Nam) is suffering a lot of losses Drought due to water trapped by dams upstream together with Climate Change, Sea Level Rise are present, its impact on Vietnam Mekong Delta and given scenarios for the specialist units to propose. 12 dams in the Chinese division, they accumulate too large water; even causing floods for the people, for many years, causing drought in the downstream, especially the Mekong Delta of Vietnam: drought, lack of water for crops, livestock, for human livelihoods. Alluvium of the river stream is also retained (formerly 160,000,000.00 tons / year, this year, only 80,000,000.00 tons / year, so not only the loss of crop but also erosion of the shoreline and coastline. and saline intrusion, under the impact of climate change is rapidly increasing and very high, in addition, the Sulfate Acidification process also becomes fierce. Characteristics of the ecological system of acid sulfate soil in the Mekong Delta, it contains more than 1.7 million Ha with S content about 1.0-.8%. in normal condition, they are not toxic, but when dry, dehydrated, and air penetrates, they will sulfate acidification very strong, produces highly toxic (Al3+> 3000ppm), kills aquatic organisms and rice, and other agricultural crops. Drought due to water resources by upstream countries, mainly by China, will be increasingly fierce: 6 processes simultaneously occurring in this Ecosystem: 1- Drought, 2: sulfate acidification, 3. Saltwaterization, 4. Lack of alluvium and nutrition, 5- riverbank erosion, sedimentation of estuaries and seaports; and 6 – Coastal landslide (which in the past, accreted to the sea 100m /year, now, in contrast, erosion and sea intrusion 25m/year. Productivity of rice and fisheries has been and will continue to decrease.

scholarly journals DIFFERENCES AND SIMILARITIES IN IMPACTS OF HYDROELETRIC DAMS BETWEEN NORTH AND SOUTH OF BRAZIL

2016 ◽  
Vol 19 (2) ◽  
pp. 265-286 ◽  
Author(s):  
GUILLAUME LETURCQ
Keyword(s):  
Hydroelectric Dams ◽  
Secondary Sources ◽  
The North ◽  
The People ◽  
Hydroelectric Dam ◽  
Area North ◽  
South Of Brazil ◽  
The Impact ◽  
North And South ◽  
Belo Monte

Abstract The environmental impacts of hydroelectric dams in Brazil are investigated in local and regional scales, for the last years. In this paper, we analyze the impact than the establishment of a hydroelectric dam has for the people and their spaces, with the comparative experiences occurred for the North and South of Brazil. We will focus on aspects related to the organization of families, social fight, the compensation and resettlement of people affected by the dam's construction, as well we take a look to the similarities between the two areas, with emphasis on aspects related to migration, mobility and landscapes. For this, we rely on research carried out on the river Uruguay (South), based on interviews, questionnaires and studies of primary and secondary sources, from 2007 to 2014 and also in a survey that is currently being held in Belo Monte area (North), which also uses primary and secondary sources, with fieldwork periods.

What the past can say about the present and future of fire

2020 ◽  
Vol 96 ◽  
pp. 66-87
Author(s):  
Jennifer R. Marlon
Keyword(s):  
Climate Change ◽  
Terrestrial Ecosystems ◽  
Combustion Products ◽  
Temperature Changes ◽  
The Public ◽  
The Past ◽  
Warming Climate ◽  
Highly Sensitive ◽  
In Fire ◽  
Very High

AbstractWildfires are an integral part of most terrestrial ecosystems. Paleofire records composed of charcoal, soot, and other combustion products deposited in lake and marine sediments, soils, and ice provide a record of the varying importance of fire over time on every continent. This study reviews paleofire research to identify lessons about the nature of fire on Earth and how its past variability is relevant to modern environmental challenges. Four lessons are identified. First, fire is highly sensitive to climate change, and specifically to temperature changes. As long as there is abundant, dry fuel, we can expect that in a warming climate, fires will continue to grow unusually large, severe, and uncontrollable in fire-prone environments. Second, a better understanding of “slow” (interannual to multidecadal) socioecological processes is essential for predicting future wildfire and carbon emissions. Third, current patterns of burning, which are very low in some areas and very high in others—are often unprecedented in the context of the Holocene. Taken together, these insights point to a fourth lesson—that current changes in wildfire dynamics provide an opportunity for paleoecologists to engage the public and help them understand the potential consequences of anthropogenic climate change.

Impact of Climate Change on Rural Livelihood: A Case Study of Central Rajasthan

2021 ◽  
Vol 7 (4) ◽  
pp. 19-27
Author(s):  
Saifuddin Soz ◽  
Dhananjay Mankar
Keyword(s):  
Climate Change ◽  
Negative Impact ◽  
Extreme Weather Events ◽  
Household Level ◽  
Impact Of Climate Change ◽  
The People ◽  
Weather Events ◽  
Rural Livelihood ◽  
The Pacific ◽  
The Impact

Climate change is already bringing tremendous influence on people’s lives, particularly the underprivileged. It’s already visible in a variety of ways. In recent decades, Asia and the Pacific have seen consistent warming trends as well as more frequent and powerful extreme weather events such as droughts, cyclones, floods, and hailstorms. This study was done in Ajmer District of Rajasthan, to find out the climate variation in the last 10 years. The study describes the effects due to climate change on the livelihoods of the people, so a descriptive research design was used for the study to find out the impact of climate change on rural livelihood in central Rajasthan. The study is based on a large representative of sample, quantitative data was collected to gain an idea of the impact on the livelihoods due to climate change at the household level. It shows the negative impact of climate change on rural livelihood which forced the people to change their livelihood directly or indirectly. It was found that climate change had an impact on people’s lives and people do understand the variation in climate change in terms of changes in the weather, unseasonal rain, and drought.

The impact of climate change and human activities on the Aral Sea Basin over the past 50 years

2020 ◽  
Vol 245 ◽  
pp. 105125 ◽  
Author(s):  
Xuanxuan Wang ◽  
Yaning Chen ◽  
Zhi Li ◽  
Gonghuan Fang ◽  
Fei Wang ◽  
...  
Keyword(s):  
Climate Change ◽  
Human Activities ◽  
Aral Sea ◽  
Aral Sea Basin ◽  
Impact Of Climate Change ◽  
The Past ◽  
The Impact

scholarly journals Forest carbon allocation modelling under climate change

2019 ◽  
Vol 39 (12) ◽  
pp. 1937-1960 ◽  
Author(s):  
Katarína Merganičová ◽  
Ján Merganič ◽  
Aleksi Lehtonen ◽  
Giorgio Vacchiano ◽  
Maša Zorana Ostrogović Sever ◽  
...  
Keyword(s):  
Climate Change ◽  
Environmental Conditions ◽  
Carbon Allocation ◽  
Hybrid Approach ◽  
Ecosystem Dynamics ◽  
Nonstructural Carbohydrates ◽  
The Past ◽  
Process Understanding ◽  
Vegetation Models ◽  
The Impact

Abstract Carbon allocation plays a key role in ecosystem dynamics and plant adaptation to changing environmental conditions. Hence, proper description of this process in vegetation models is crucial for the simulations of the impact of climate change on carbon cycling in forests. Here we review how carbon allocation modelling is currently implemented in 31 contrasting models to identify the main gaps compared with our theoretical and empirical understanding of carbon allocation. A hybrid approach based on combining several principles and/or types of carbon allocation modelling prevailed in the examined models, while physiologically more sophisticated approaches were used less often than empirical ones. The analysis revealed that, although the number of carbon allocation studies over the past 10 years has substantially increased, some background processes are still insufficiently understood and some issues in models are frequently poorly represented, oversimplified or even omitted. Hence, current challenges for carbon allocation modelling in forest ecosystems are (i) to overcome remaining limits in process understanding, particularly regarding the impact of disturbances on carbon allocation, accumulation and utilization of nonstructural carbohydrates, and carbon use by symbionts, and (ii) to implement existing knowledge of carbon allocation into defence, regeneration and improved resource uptake in order to better account for changing environmental conditions.

scholarly journals Fragile States Index Considering Climate Factors

2018 ◽  
Vol 8 (3) ◽  
pp. 74
Author(s):  
Geng-Jian Zhou ◽  
Qiao-Xu Qin ◽  
Wei-Zhou Lin ◽  
Yuan-Biao Zhang
Keyword(s):  
Climate Change ◽  
Democratic Republic ◽  
Fragile States ◽  
Climate Factors ◽  
Profound Impact ◽  
The Past ◽  
Republic Of The Congo ◽  
Intervention Policy ◽  
Earth’S Climate ◽  
The Impact

Over the past few decades, the Earth’s climate has undergone conspicuous changes, some of which have a profound impact on social and governmental systems. The purpose of this paper is to establish a model for measuring national fragile and the impact of climate change on a country. For this purpose, we first define the Fragile States Index (FSI) to measure the fragility of a country based on population, crime rate and education, which are the three aspects that most countries or regions will focus on. Second, we use the FSI to illustrate how climate change affects the Democratic Republic of the Congo. Third, we analyze the definitive indicators of Indonesia and predict the changes of FSI. Finally, the effects of each intervention policy were obtained by analyzing Indonesia’s intervention policy on environmental change. To provide ideas for intervention on climate change.

The distributional impact of climate change on rich and poor countries

2006 ◽  
Vol 11 (2) ◽  
pp. 159-178 ◽  
Author(s):  
ROBERT MENDELSOHN ◽  
ARIEL DINAR ◽  
LARRY WILLIAMS
Keyword(s):  
Climate Change ◽  
Economic Sectors ◽  
Poor Countries ◽  
Impact Of Climate Change ◽  
Market Impacts ◽  
Low Latitudes ◽  
Per Capita ◽  
Distributional Impact ◽  
The Impact ◽  
Very High

This paper examines the impact of climate change on rich and poor countries across the world. We measure two indices of the relative impact of climate across countries, impact per capita, and impact per GDP. These measures sum market impacts across the climate-sensitive economic sectors of each country. Both indices reveal that climate change will have serious distributional impact across countries, grouped by income per capita. We predict that poor countries will suffer the bulk of the damages from climate change. Although adaptation, wealth, and technology may influence distributional consequences across countries, we argue that the primary reason that poor countries are so vulnerable is their location. Countries in the low latitudes start with very high temperatures. Further warming pushes these countries ever further away from optimal temperatures for climate-sensitive economic sectors.

Perception of climate change and adaptation strategies in Vietnam

2017 ◽  
Vol 9 (4) ◽  
pp. 501-516 ◽  
Author(s):  
Ashok K. Mishra ◽  
Valerian O. Pede
Keyword(s):  
Climate Change ◽  
Negative Binomial ◽  
Management Strategies ◽  
Mekong Delta ◽  
Climatic Changes ◽  
Adaptation Strategies ◽  
Content Type ◽  
Climatic Stress ◽  
Financial Strategies ◽  
The Impact

Purpose The purpose of this study is to first examine the factors affecting the intra-household perception of climate change. Second, the study investigates the impact of the perception of climatic stress on the operators’ and spouses’ intra-household adaptation strategies (farm and household financial strategies). Design/methodology/approach The study uses household survey data from Vietnam’s Mekong Delta. The study uses probit and negative binomial count data approaches to evaluate the empirical model. Findings Results confirm the existence of intra-household gender differences in the adaptation strategies. The authors found that although spouses perceive climatic stress, they are less likely to adapt to such stresses when it comes farming enterprise, but more likely to adapt to household financial strategies. In contrast, farm operators, in the presence of climatic stresses, undertake both farm and household finance adaptation strategies. Practical implications Investment in climate smart agriculture can help households in managing climatic stresses. Originality/value A farmer in Asia, and Vietnam in particular, faces significant risks from climatic changes. In Vietnam, agriculture is easily affected by natural disasters and climatic changes. This study provides insights into the perception of climatic changes by operators and spouses in Vietnam’s Mekong Delta. Perceived changes in the climate have a greater impact on women because they typically lack the necessary tools to adapt to climate change. The current findings could be useful in managing climatic risk in Vietnam’s Mekong Delta and be helpful to policymakers in designing risk management strategies in response to climatic changes.

scholarly journals Pacific Journalism Monographs No 3: Kiribati media, science and politics

2014 ◽  
Author(s):  
Taberannang Korauaba
Keyword(s):  
Climate Change ◽  
Empirical Study ◽  
The Public ◽  
Impact Of Climate Change ◽  
The People ◽  
The Pacific ◽  
Local Media ◽  
Science And Politics ◽  
The Media ◽  
The Impact

By Taberannang Korauaba Although the Pacific nation of Kiribati has been identified as one of the most vulnerable countries to the impact of climate change, little is known about the attitudes of the local media and the public toward this issue. This is in contrast to empirical study findings which have shown that the public and the media were aware of the threats posed by climate change. This monograph extracted from the author’s thesis argues that the people of Kiribati are not united over climate change. Browse the author's MCS thesis on Kiribati

scholarly journals The Effect of Neonicotinoid Insecticides on the Structure and Stability of Bio-Macromolecules

2021 ◽  
Author(s):  
Valéria Verebová ◽  
Jana Staničová
Keyword(s):  
High Risk ◽  
Aquatic Organisms ◽  
Environmental Risks ◽  
Biological Macromolecules ◽  
Serum Albumins ◽  
Biological Origin ◽  
Structure And Stability ◽  
The World ◽  
The Impact ◽  
Very High

Insecticides are among the most widely used pesticides in the world. They are preparations of chemical and biological origin used to control insects, which means its killing or preventing its destructive activity. Majority are used in forestry, agriculture, and households. Neonicotinoids represent the class of insecticides that is most frequently used in the world and replaced by more dangerous pyrethroids, organophosphates, and carbamates. In recent years, the focus has been mainly on the ecological and environmental risks caused by the use of neonicotinoids. These insecticides pose a very high risk to bees and also to soil and aquatic organisms. It is therefore highly topical to address the impact of neonicotinoids on biological systems on individual bio-macromolecules (DNA and serum albumins). Monitoring the impact of neonicotinoids on the structure and stability of biological macromolecules may contribute to reducing the use of these insecticides, as well as to considering and adjusting the tolerances of insecticides and their residues in food.

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