How does biochar affect soil respiration?

2020 ◽  
Author(s):  
Adam Kubaczyński ◽  
Anna Walkiewicz ◽  
Małgorzata Brzezińska ◽  
Bogusław Usowicz
Keyword(s):  
Climate Change ◽  
Soil Respiration ◽  
Agricultural Soils ◽  
Satellite Monitoring ◽  
Low Oxygen ◽  
Short Term ◽  
Chromatography Method ◽  
Wide Range ◽  
The Impact

<p>Agricultural soils are an important landscape element in terms of climate change and this ecosystem is considered as a one of the major source of greenhouse gases (GHGs). Soil may be also a sink for GHGs, from this reason so many research projects are focused on determination of factors and conditions affecting gas exchange. Biochar is produced from biomass that has been pyrolysed in a zero or low oxygen availability. It is currently widely considered as a stable addition to the soil, which not only improve its fertility, but also can mitigate climate change. Considering landscape elements, the char also prevents carbon loss from forest soils. Higher microbial activity is usually associated with higher carbon dioxide (CO<sub>2</sub>) production (soil respiration). One of the most important questions is how does biochar influence production of GHGs such as CO<sub>2</sub>? Which doses have a critical meaning for CO<sub>2</sub> emission? The aim of our study was to determine the effect of wide range doses of biochar (produced from sunflower husks) (from 1 to 100 Mg ha<sup>-1</sup>) to Haplic Luvisol soil from fallow fields. We investigated the changes of CO<sub>2</sub> emission during laboratory incubation using gas chromatography method. In short-term incubations soil respiration was positively correlated with increasing biochar dose, while during long-term (several years) observation, the impact of biochar dose on the amount of emitted CO<sub>2</sub> was not so significant. It is worthwhile to conduct short- term and long-term field studies in this area.</p><p>Research was partially conducted under the project “Water in soil - satellite monitoring and improving the retention using biochar” no. BIOSTRATEG3/345940/7/NCBR/2017 which was financed by Polish National Centre for Research and Development in the framework of “Environment, agriculture and forestry” - BIOSTRATEG strategic R&D programme.</p>

scholarly journals Assessing the impact of market logic and long-term strategic plans of top management in share buyback decisions

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Istemi Demirag ◽  
Thanamas Kungwal ◽  
Yassine Bakkar
Keyword(s):  
Short Term ◽  
Content Type ◽  
Strategic Objectives ◽  
Strategic Plans ◽  
Wide Range ◽  
Corporate Goals ◽  
The Impact ◽  
Depth Interviews ◽  
Term Management

PurposeThis paper investigates stakeholders' perspectives of share buybacks in the context of time-horizons of investment decisions and strategy.Design/methodology/approachWe use in-depth interviews with stakeholders from eight listed UK firms as well as examine their publicly available data.FindingsFindings suggest that share buybacks involve a wide range of stakeholders' rational interests and long-term management perspectives as they enable firms to strategise operational plans towards their long-term corporate goals.Research limitations/implicationsThe findings are based on interviews with a small number of share buyback firms and the findings, therefore, may not be generalised to all firms.Practical implicationsThe results show that share buybacks may be part of the long-term interests of firms and not necessarily used as part of short-term EPS increases as suggested in the extant literature.Originality/valueThe findings contribute to the literature on corporate pay-out policies in the context of short-term financial objectives vs long-term strategic objectives of stakeholders. They show that share buybacks can be an important part of firms' long-term strategic considerations.

scholarly journals Impact of Climate Change on Cereal Yield and Production in the Sahel: Case of Burkina Faso

2020 ◽  
pp. 1-11
Author(s):  
Shéïtan Sossou ◽  
Charlemagne Babatounde Igue ◽  
Moussa Diallo
Keyword(s):  
Climate Change ◽  
Burkina Faso ◽  
Series Data ◽  
Short Term ◽  
Impact Of Climate Change ◽  
The World ◽  
Cereal Production ◽  
Agricultural Yield ◽  
The Impact

Climate change is one of the biggest challenges of the 21st century. It affects all countries in the world, especially Sahelian countries in Africa. This paper aimed at evaluating the impact of climate change on cereal yield in Burkina Faso. The ordinary least squares (OLS) was applied to time-series data from 1991 to 2016 collected on the World Bank website. The results have shown that temperature adversely affects yield and cereal production, while precipitation has positive effect. An increase in rainfall of 1 millimetre would increase cereal production by 385 tons in the long term and 252 tons in the short term. In the same, an increase in rainfall of 1 millimetre would increase agricultural yield by 9 kg per hectare in the long term. However, in the short term, an increase in temperatures of 1ºC would result in a decrease in cereal production and agricultural yield of 134748 tons and 72 kg per hectare, respectively. However, in the long term, a rise in temperatures of 1ºC would result in a decrease in cereal production and cereal yield of 154 634 tons and 1074 kg per hectare, respectively. Besides, the results indicate that the emission of carbon dioxide (CO2) has no significant effect on yield and cereal production. Implementing effective adaptation strategies, such as access to improved seed, introduce smart agriculture in the system of cereal in Burkina Faso and increasing irrigation infrastructure could reduce the cereal production's vulnerability to climate shocks.

The Impact of Climate Change on Agricultural Productivity in Asian Countries: a heterogeneous panel data approach

2021 ◽  
Author(s):  
Dicle Ozdemir
Keyword(s):  
Climate Change ◽  
Agricultural Productivity ◽  
Short Term ◽  
Global Food Security ◽  
Long Run ◽  
Short Run ◽  
Carbon Fertilization ◽  
The Impact ◽  
Heterogeneous Panel

Abstract While climate change is having serious impacts on agriculture and may require ongoing adaptation, short-term threats to global food security are also crucial for developing countries. This study aims to investigate how the effects of climate change on agricultural productivity vary depending upon the short-run and long-run in Asia over the period of 1980–2016. The results confirmed that there is a long-term relationship between agricultural productivity and climate change variables; however, only CO2 emissions could be linked to agricultural productivity in the short-term. Moreover, while the direction of this effect is positive for the short term, it turns into negative in the long term confirming that carbon fertilization in the atmosphere can to some extent have a positive effect on agricultural productivity.

Adaptation to climate changes by farming households in developing countries: a case study of Eritrea

2021 ◽  
pp. 55-59
Author(s):  
M.G. Debesai ◽  
Keyword(s):  
Climate Change ◽  
Developing Countries ◽  
Climate Variability ◽  
Seed Quality ◽  
Coping Mechanisms ◽  
Short Term ◽  
Impact Of Climate Change ◽  
The Impact ◽  
Farming Households

The impact of climate change on the livelihood of farming households is a great concern particularly in developing countries. Based on a household survey conducted in 2016, in Eritrea, this paper attempts to investigate the adaptation conditions to climate change impacts on smallholder farming household. Several socioeconomic, biophysical and environmental factors affecting their farming system were listed by the respondents, including drought, soil degradation, pests and diseases, poor farm management, poor soil fertility, poor agricultural tools, and poor seed quality. Farming households employed short term coping mechanisms and long term adaption strategies to overcome the problems resulted from climate variability. The households cope up with short term climate variability at the expense of deteriorating their resources or losing their assets temporarily or permanently while they practice a long term adaptation strategy which is more or less in favour of sustaining the resource and preserving the environment. It is, therefore, recommended that policymakers need to encourage sustainable development and work to reduce the negative impact of climate change on farming households by emphasising on both short tern coping mechanisms and long term adaptation strategies.

scholarly journals Impacts of Climate Change: Can Fisheries and Aquaculture Sectors Survive the Wave?

2020 ◽  
Vol 4 (1) ◽  
pp. 78
Author(s):  
Talent Ndlovu ◽  
Sylvain Charlebois
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Food Security ◽  
Food Insecurity ◽  
Holistic Approach ◽  
Short Term ◽  
Ocean Ecosystem ◽  
The Impact ◽  
Impacts Of Climate Change

Studies have shown the impact of climate change on the ocean ecosystem and the fishing and aquaculture sectors. As global warming intensifies, this will impact communities and communities as the populations of some fish species decline or increase. Research on the impacts of climate change to fisheries will facilitate the development of policies, helping communities to adapt while ensuring resilience and sustainability of the sector(s). This paper assesses the short term and long-term impacts of climate change to the ocean ecosystem, the consequences to economies and communities that rely on fishing for food security. It begins with a review of peer reviewed literature, followed by an analysis of the current policies and ends with some recommendations for governments in the sustainability and management of the ecosystem in the future. Important to note is the impact of human generated hazards and how a more holistic approach to minimizing risks to the ocean ecosystem could resolve threats of food insecurity in future.

scholarly journals Global-Scale Metabolomic Profiling of Human Hair for Simultaneous Monitoring of Endogenous Metabolome, Short- and Long-Term Exposome

2021 ◽  
Vol 9 ◽  
Author(s):  
Ying Chen ◽  
Jian Guo ◽  
Shipei Xing ◽  
Huaxu Yu ◽  
Tao Huan
Keyword(s):  
High Performance ◽  
High Resolution Mass Spectrometry ◽  
Global Scale ◽  
Short Term ◽  
Experimental Conditions ◽  
Hair Samples ◽  
Wide Range ◽  
Endogenous Metabolites ◽  
The Impact

Hair is a unique biological matrix that adsorbs short-term exposures (e. g., environmental contaminants and personal care products) on its surface and also embeds endogenous metabolites and long-term exposures in its matrix. In this work, we developed an untargeted metabolomics workflow to profile both temporal exposure chemicals and endogenous metabolites in the same hair sample. This analytical workflow begins with the extraction of short-term exposures from hair surfaces through washing. Further development of mechanical homogenization extracts endogenous metabolites and long-term exposures from the cleaned hair. Both solutions of hair wash and hair extract were analyzed using ultra-high-performance liquid chromatography-high-resolution mass spectrometry (UHPLC-HRMS)-based metabolomics for global-scale metabolic profiling. After analysis, raw data were processed using bioinformatic programs recently developed specifically for exposome research. Using optimized experimental conditions, we detected a total of 10,005 and 9,584 metabolic features from hair wash and extraction samples, respectively. Among them, 274 and 276 features can be definitively confirmed by MS2 spectral matching against spectral library, and an additional 3,356 and 3,079 features were tentatively confirmed as biotransformation metabolites. To demonstrate the performance of our hair metabolomics, we collected hair samples from three female volunteers and tested their hair metabolic changes before and after a 2-day exposure exercise. Our results show that 645 features from wash and 89 features from extract were significantly changed from the 2-day exposure. Altogether, this work provides a novel analytical approach to study the hair metabolome and exposome at a global scale, which can be implemented in a wide range of biological applications for a deeper understanding of the impact of environmental and genetic factors on human health.

scholarly journals THE ESTIMATION OF GHG EMISSIONS FOR HOTELS IN ASIAN INSTITUTE OF TECHNOLOGY AND CHIANG MAI HILL 2000, THAILAND

2015 ◽  
Vol 1 (1) ◽  
pp. 1 ◽  
Author(s):  
Luansak Supansa
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Hotel Industry ◽  
Ghg Emissions ◽  
Low Carbon ◽  
Chiang Mai ◽  
Short Term ◽  
Wide Range ◽  
Institute Of Technology

In the tourism sector, hotel industry is one of the most important sub-sector. This hotel industry emits greenhouse gas (GHG) emissions mainly carbon dioxide (CO2) by consuming large amount of energy, water, and non-renewable resources in service operation everyday on basis. This paper presents results of analysis how much does the GHG emissions release in hotel. The Asian Institute of Technology Conference Center and Chiang Mai Hill 2000, Chiang Mai, Thailand have successfully estimated GHG emissions by using Bilan Carbone® tool. The mitigation options are to encourage low carbon dioxide hotels. The data collection was done by questionnaires, interviews, and observations in both of them hotels. The results of annual GHG emissions contributor both Chiang Mai Hill 2000 as 3,844 t CO2 and at AITCC about 1,011 t CO2. Energy use is a major emission contributor followed by travel, property, input material, waste generated, and freight. Higher number of guests/tourists flow, effected higher used of facilities such as electricity, air conditioning, lighting, and food & beverage. Larger size hotel service quality, greater guest room service, wide range of building area, greater facilities, and large functional are consumed higher energy and materials. As well as, the higher rate of room turning can also increase of emissions. Moreover, Chiang Mai Hill 2000 tends to take transportation which have longer distance than AITCC. Therefore, increasing higher journal distance generated higher GHG emissions as well. The short term and long term mitigation plans can also be taken into consideration to reduce GHG emissions. The recommendation of short term mitigation plans can be applied directly in both hotels thus, increasing awareness about climate change and energy conservation among uses. The long term mitigation plans recommends to give “Green Hotel” award to successful hotels for reducing GHG emissions in hotel. These plans can be incorporated the Thailand’s government policy to reduce the impacts of climate change to the hotel industry. 

SUMBER-SUMBER RESILIENSI PADA REMAJA AKHIR YANG MENGALAMI KEKERASAN DARI ORANGTUA PADA MASA KANAK-KANAK

Psibernetika ◽  
2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Devina Calista ◽  
Garvin Garvin
Keyword(s):  
Late Adolescents ◽  
Long Term Effects ◽  
Short Term ◽  
Parental Affection ◽  
Resilience Factors ◽  
Childhood Violence ◽  
Past Experiences ◽  
The Impact ◽  
Depth Interviews

<p><em>Child abuse by parents is common in households. The impact of violence on children will bring short-term effects and long-term effects that can be attributed to their various emotional, behavioral and social problems in the future; especially in late adolescence that will enter adulthood. Resilience factors increase the likelihood that adolescents who are victims of childhood violence recover from their past experiences</em><em>,</em><em> become more powerful individuals and have a better life. The purpose of this study was to determine the source of resilience in late adolescents who experienced violence from parents in their childhood. This research uses qualitative research methods with in-depth interviews as a method of data collection. The result shows that the three research participants have the aspects of "I Have", "I Am", and "I Can"; a participant has "I Can" aspects as a source of resilience, and one other subject has no source of resilience. The study concluded that parental affection and acceptance of the past experience have role to the three sources of resilience (I Have, I Am, and I Can)</em></p><p><em> </em></p><p><strong><em>Keyword : </em></strong><em>Resilience, adolescence, violence, parents</em></p>

A MODELING SYSTEM FOR CLIMATE CHANGE RISK ASSESSMENT, MANAGEMENT AND HEDGING IN COASTAL AREAS

2017 ◽  
Author(s):  
Sergei Soldatenko ◽  
Sergei Soldatenko ◽  
Genrikh Alekseev ◽  
Genrikh Alekseev ◽  
Alexander Danilov ◽  
...  
Keyword(s):  
Climate Change ◽  
Risk Assessment ◽  
Coastal Areas ◽  
Mitigation Strategies ◽  
System Structure ◽  
The Arctic ◽  
Risk Modeling ◽  
Wide Range ◽  
Adverse Weather ◽  
The Impact

Every aspect of human operations faces a wide range of risks, some of which can cause serious consequences. By the start of 21st century, mankind has recognized a new class of risks posed by climate change. It is obvious, that the global climate is changing, and will continue to change, in ways that affect the planning and day to day operations of businesses, government agencies and other organizations and institutions. The manifestations of climate change include but not limited to rising sea levels, increasing temperature, flooding, melting polar sea ice, adverse weather events (e.g. heatwaves, drought, and storms) and a rise in related problems (e.g. health and environmental). Assessing and managing climate risks represent one of the most challenging issues of today and for the future. The purpose of the risk modeling system discussed in this paper is to provide a framework and methodology to quantify risks caused by climate change, to facilitate estimates of the impact of climate change on various spheres of human activities and to compare eventual adaptation and risk mitigation strategies. The system integrates both physical climate system and economic models together with knowledge-based subsystem, which can help support proactive risk management. System structure and its main components are considered. Special attention is paid to climate risk assessment, management and hedging in the Arctic coastal areas.

scholarly journals Breathing space: deoxygenation of aquatic environments can drive differential ecological impacts across biological invasion stages

2021 ◽  
Author(s):  
James W. E. Dickey ◽  
Neil E. Coughlan ◽  
Jaimie T. A. Dick ◽  
Vincent Médoc ◽  
Monica McCard ◽  
...  
Keyword(s):  
Climate Change ◽  
Oxygen Saturation ◽  
Ecological Impacts ◽  
Neogobius Melanostomus ◽  
Aquatic Environments ◽  
Relative Impact ◽  
Low Oxygen ◽  
Per Capita ◽  
The Impact ◽  
Prey Populations

AbstractThe influence of climate change on the ecological impacts of invasive alien species (IAS) remains understudied, with deoxygenation of aquatic environments often-overlooked as a consequence of climate change. Here, we therefore assessed how oxygen saturation affects the ecological impact of a predatory invasive fish, the Ponto-Caspian round goby (Neogobius melanostomus), relative to a co-occurring endangered European native analogue, the bullhead (Cottus gobio) experiencing decline in the presence of the IAS. In individual trials and mesocosms, we assessed the effect of high, medium and low (90%, 60% and 30%) oxygen saturation on: (1) functional responses (FRs) of the IAS and native, i.e. per capita feeding rates; (2) the impact on prey populations exerted; and (3) how combined impacts of both fishes change over invasion stages (Pre-invasion, Arrival, Replacement, Proliferation). Both species showed Type II potentially destabilising FRs, but at low oxygen saturation, the invader had a significantly higher feeding rate than the native. Relative Impact Potential, combining fish per capita effects and population abundances, revealed that low oxygen saturation exacerbates the high relative impact of the invader. The Relative Total Impact Potential (RTIP), modelling both consumer species’ impacts on prey populations in a system, was consistently higher at low oxygen saturation and especially high during invader Proliferation. In the mesocosm experiment, low oxygen lowered RTIP where both species were present, but again the IAS retained high relative impact during Replacement and Proliferation stages at low oxygen. We also found evidence of multiple predator effects, principally antagonism. We highlight the threat posed to native communities by IAS alongside climate-related stressors, but note that solutions may be available to remedy hypoxia and potentially mitigate impacts across invasion stages.

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