keyword
MENU ▼
Read by QxMD icon Read
search

Carbon budget

keyword
https://www.readbyqxmd.com/read/28797887/grassland-productivity-and-carbon-sequestration-in-mongolian-grasslands-the-underlying-mechanisms-and-nomadic-implications
#1
Changliang Shao, Jiquan Chen, Housen Chu, Raffaele Lafortezza, Gang Dong, Michael Abraha, Ochirbat Batkhishig, Ranjeet John, Zutao Ouyang, Yaoqi Zhang, Jiaguo Qi
BACKGROUND: Quantifying carbon (C) dioxide exchanges between ecosystems and the atmosphere and the underlying mechanism of biophysical regulations under similar environmental conditions is critical for an accurate understanding of C budgets and ecosystem functions. METHODS: For the first time, a cluster of four eddy covariance towers were set up to answer how C fluxes shift among four dominant ecosystems in Mongolia - meadow steppe (MDW), typical steppe (TPL), dry typical steppe (DRT) and shrubland (SHB) during two growing seasons (2014 and 2015)...
August 7, 2017: Environmental Research
https://www.readbyqxmd.com/read/28797147/understanding-the-spatial-distribution-of-factors-controlling-topsoil-organic-carbon-content-in-european-soils
#2
M Rial, A Martínez Cortizas, L Rodríguez-Lado
Soil Organic Carbon (SOC) constitutes the largest terrestrial carbon pool. The understanding of its dynamics and the environmental factors that influence its behaviour as sink or source of atmospheric CO2 is crucial to quantify the carbon budget at the global scale. At the European scale, most of the existing studies to account for SOC stocks are centred in the fitting of predictive model to ascertain the distribution of SOC. However, the development of methodologies for monitoring and identifying the environmental factors that control SOC storage in Europe remains a key research challenge...
August 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28793399/effects-of-three-years-of-simulated-nitrogen-deposition-on-soil-nitrogen-dynamics-and-greenhouse-gas-emissions-in-a-korean-pine-plantation-of-northeast-china
#3
Lei Song, Peng Tian, Jinbo Zhang, Guangze Jin
Continuously enhanced nitrogen (N) deposition alters the pattern of N and carbon (C) transformations, and thus influences greenhouse gas emissions. It is necessary to clarify the effect of N deposition on greenhouse gas emissions and soil N dynamics for an accurate assessment of C and N budgets under increasing N deposition. In this study, four simulated N deposition treatments (control [CK: no N addition], low-N [L: 20kgNha(-1)yr(-1)], medium-N [M: 40kgNha(-1)yr(-1)], and high-N [H: 80kgNha(-1)yr(-1)]) were operated from 2014...
August 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28769971/soil-inorganic-carbon-sequestration-following-afforestation-is-probably-induced-by-pedogenic-carbonate-formation-in-northwest-china
#4
Yang Gao, Jing Tian, Yue Pang, Jiabin Liu
In arid and semiarid areas, the effects of afforestation on soil organic carbon (SOC) have received considerable attention. In these areas, in fact, soil inorganic carbon (SIC), rather than SOC, is the dominant form of carbon, with a reservoir approximately 2-10 times larger than that of SOC. A subtle fluctuation of SIC pool can strongly alter the regional carbon budget. However, few studies have focused on the variations in SIC, or have used stable soil carbon isotopes to analyze the reason for SIC variations following afforestation in degraded semiarid lands...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28763653/land-use-change-effects-on-ecosystem-carbon-budget-in-the-sichuan-basin-of-southwest-china-conversion-of-cropland-to-forest-ecosystem
#5
Xiaoguo Wang, Minghua Zhou, Tao Li, Yun Ke, Bo Zhu
In the humid subtropics, conversion of cropland to forest has been recognized to influence carbon cycling (e.g., soil CO2 emissions) and the associated ecosystem carbon balance. A three-year field study was conducted in situ to quantitatively evaluate effects of land use change on carbon budget in a cropland (under winter wheat-summer maize rotation) comparison with the adjacent forest ecosystem. During the three-year experimental period, on average, soil heterotrophic respirations were 35.19mgC·m(-2)·h(-1) for the cropland and 40...
July 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28755724/effects-of-elevated-co2-on-phytoplankton-community-biomass-and-species-composition-during-a-spring-phaeocystis-spp-bloom-in-the-western-english-channel
#6
Matthew Keys, Gavin Tilstone, Helen S Findlay, Claire E Widdicombe, Tracy Lawson
A 21-year time series of phytoplankton community structure was analysed in relation to Phaeocystis spp. to elucidate its contribution to the annual carbon budget at station L4 in the western English Channel (WEC). Between 1993-2014 Phaeocystis spp. contributed ∼4.6% of the annual phytoplankton carbon and during the March - May spring bloom, the mean Phaeocystis spp. biomass constituted 17% with a maximal contribution of 47% in 2001. Upper maximal weekly values above the time series mean ranged from 63 to 82% of the total phytoplankton carbon (∼42-137mg carbon (C)m(-3)) with significant inter-annual variability in Phaeocystis spp...
July 2017: Harmful Algae
https://www.readbyqxmd.com/read/28751686/carbon-stocks-and-changes-of-dead-organic-matter-in-china-s-forests
#7
Jianxiao Zhu, Huifeng Hu, Shengli Tao, Xiulian Chi, Peng Li, Lai Jiang, Chengjun Ji, Jiangling Zhu, Zhiyao Tang, Yude Pan, Richard A Birdsey, Xinhua He, Jingyun Fang
Forests play an important role in global carbon cycles. However, the lack of available information on carbon stocks in dead organic matter, including woody debris and litter, reduces the reliability of assessing the carbon cycles in entire forest ecosystems. Here we estimate that the national DOM carbon stock in the period of 2004-2008 is 925 ± 54 Tg, with an average density of 5.95 ± 0.35 Mg C ha(-1). Over the past two decades from periods of 1984-1988 to 2004-2008, the national dead organic matter carbon stock has increased by 6...
July 28, 2017: Nature Communications
https://www.readbyqxmd.com/read/28734252/river-sequesters-atmospheric-carbon-and-limits-the-co2-degassing-in-karst-area-southwest-china
#8
Tao Zhang, Jianhong Li, Junbing Pu, Jonathan B Martin, Mitra B Khadka, Feihong Wu, Li Li, Feng Jiang, Siyu Huang, Daoxian Yuan
CO2 fluxes across water-air interfaces of river systems play important roles in regulating the regional and global carbon cycle. However, great uncertainty remains as to the contribution of these inland water bodies to the global carbon budget. Part of the uncertainty stems from limited understanding of the CO2 fluxes at diurnal and seasonal frequencies caused by aquatic metabolism. Here, we measured surface water characteristics (temperature, pH, and DO, DIC, Ca(2+) concentrations) and CO2 fluxes across the air-water interface at two transects of Guijiang River, southwest China to assess the seasonal and diurnal dynamics of fluvial carbon cycling and its potential role in regional and global carbon budgets...
July 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28712130/the-role-of-protected-areas-in-land-use-land-cover-change-and-the-carbon-cycle-in-the-conterminous-united-states
#9
Xiaoliang Lu, Yuyu Zhou, Yaling Liu, Le Page Yannick
Protected Areas (PAs) cover about 22% of the conterminous U.S. Understanding their role on historical land use and land cover change (LULCC) and on the carbon cycle is essential to provide guidance for environmental policies. In this study, we compiled historical LULCC and PAs data to explore these interactions within the terrestrial biogeochemistry model (TEM). We found that intensive LULCC occurred in the conterminous U.S. from 1700 to 2005. More than three million km(2) of forest, grassland and shrublands were converted into agricultural lands, which caused 10,607 Tg C release from land ecosystems to atmosphere...
July 16, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28707260/historical-effects-of-dissolved-organic-carbon-export-and-land-management-decisions-on-the-watershed-scale-forest-carbon-budget-of-a-coastal-british-columbia-douglas-fir-dominated-landscape
#10
B P Smiley, J A Trofymow
BACKGROUND: To address how natural disturbance, forest harvest, and deforestation from reservoir creation affect landscape-level carbon (C) budgets, a retrospective C budget for the 8500 ha Sooke Lake Watershed (SLW) from 1911 to 2012 was developed using historical spatial inventory and disturbance data. To simulate forest C dynamics, data was input into a spatially-explicit version of the Carbon Budget Model-Canadian Forest Sector (CBM-CFS3). Transfers of terrestrial C to inland aquatic environments need to be considered to better capture the watershed scale C balance...
December 2017: Carbon Balance and Management
https://www.readbyqxmd.com/read/28680968/bacterial-community-composition-and-dynamics-spanning-five-years-in-freshwater-bog-lakes
#11
Alexandra M Linz, Benjamin C Crary, Ashley Shade, Sarah Owens, Jack A Gilbert, Rob Knight, Katherine D McMahon
Bacteria play a key role in freshwater biogeochemical cycling, but long-term trends in freshwater bacterial community composition and dynamics are not yet well characterized. We used a multiyear time series of 16S rRNA gene amplicon sequencing data from eight bog lakes to census the freshwater bacterial community and observe annual and seasonal trends in abundance. The sites that we studied encompassed a range of water column mixing frequencies, which we hypothesized would be associated with trends in alpha and beta diversity...
May 2017: MSphere
https://www.readbyqxmd.com/read/28680427/conservation-agriculture-improves-soil-quality-crop-yield-and-incomes-of-smallholder-farmers-in-north-western-ghana
#12
Jesse B Naab, George Y Mahama, Iddrisu Yahaya, P V V Prasad
Conservation agriculture (CA) practices are being widely promoted in many areas in sub-Saharan Africa to recuperate degraded soils and improve ecosystem services. This study examined the effects of three tillage practices [conventional moldboard plowing (CT), hand hoeing (MT) and no-tillage (NT)], and three cropping systems (continuous maize, soybean-maize annual rotation, and soybean/maize intercropping) on soil quality, crop productivity, and profitability in researcher and farmer managed on-farm trials from 2010 to 2013 in northwestern Ghana...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28628949/photosynthate-partitioning-to-starch-in-arabidopsis-thaliana-is-insensitive-to-light-intensity-but-sensitive-to-photoperiod-due-to-a-restriction-on-growth-in-the-light-in-short-photoperiods
#13
Virginie Mengin, Eva-Theresa Pyl, Thiago Alexandre Moraes, Ronan Sulpice, Nicole Krohn, Beatrice Encke, Mark Stitt
Photoperiod duration can be predicted from previous days, but irradiance fluctuates in an unpredictable manner. To investigate how allocation to starch responds to changes in these two environmental variables, Arabidopsis Col-0 was grown in a 6 h and a 12 h photoperiod at three different irradiances. The absolute rate of starch accumulation increased when photoperiod duration was shortened and when irradiance was increased. The proportion of photosynthate allocated to starch increased strongly when photoperiod duration was decreased but only slightly when irradiance was decreased...
June 19, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28628676/a-human-scale-perspective-on-global-warming-zero-emission-year-and-personal-quotas
#14
Alberto de la Fuente, Maisa Rojas, Claudia Mac Lean
This article builds on the premise that human consumption of goods, food and transport are the ultimate drivers of climate change. However, the nature of the climate change problem (well described as a tragedy of the commons) makes it difficult for individuals to recognise their personal duty to implement behavioural changes to reduce greenhouse gas emissions. Consequently, this article aims to analyse the climate change issue from a human-scale perspective, in which each of us has a clearly defined personal quota of CO2 emissions that limits our activity and there is a finite time during which CO2 emissions must be eliminated to achieve the "well below 2°C" warming limit set by the Paris Agreement of 2015 (COP21)...
2017: PloS One
https://www.readbyqxmd.com/read/28611453/adaptive-carbon-allocation-by-plants-enhances-the-terrestrial-carbon-sink
#15
Jiangzhou Xia, Wenping Yuan, Ying-Ping Wang, Quanguo Zhang
Carbon allocation is one of the most important physiological processes to optimize the plant growth, which exerts a strong influence on ecosystem structure and function, with potentially large implications for the global carbon budget. However, it remains unclear how the carbon allocation pattern has changed at global scale and impacted terrestrial carbon uptake. Based on the Community Atmosphere Biosphere Land Exchange (CABLE) model, this study shows the increasing partitioning ratios to leaf and wood and reducing ratio to root globally from 1979 to 2014...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28596620/respiratory-oxygen-consumption-in-the-seagrass-zostera-marina-varies-on-a-diel-basis-and-is-partly-affected-by-light
#16
Lina M Rasmusson, Chiara Lauritano, Gabriele Procaccini, Martin Gullström, Pimchanok Buapet, Mats Björk
The seagrass Zostera marina is an important marine ecosystem engineer, greatly influencing oxygen and carbon fluctuations in temperate coastal areas. Although photosynthetically driven gas fluxes are well studied, the impact of the plant's mitochondrial respiration on overall CO2 and O2 fluxes in marine vegetated areas is not yet understood. Likewise, the gene expression in relation to the respiratory pathway has not been well analyzed in seagrasses. This study uses a combined approach, studying respiratory oxygen consumption rates in darkness simultaneously with changes in gene expression, with the aim of examining how respiratory oxygen consumption fluctuates on a diel basis...
2017: Marine Biology
https://www.readbyqxmd.com/read/28585372/widespread-production-of-nonmicrobial-greenhouse-gases-in-soils
#17
Bin Wang, Manuel Lerdau, Yongli He
Carbon dioxide (CO2 ), methane (CH4 ), and nitrous oxide (N2 O) are the three most important greenhouse gases (GHGs), and all show large uncertainties in their atmospheric budgets. Soils of natural and managed ecosystems play an extremely important role in modulating their atmospheric abundance. Mechanisms underlying the exchange of these GHGs at the soil-atmosphere interface are often assumed to be exclusively microbe-mediated (M-GHGs). We argue that it is a widespread phenomenon for soil systems to produce GHGs through nonmicrobial pathways (NM-GHGs) based on a review of the available evidence accumulated over the past half century...
June 6, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28582677/fast-and-safe-gas-detection-from-underground-coal-fire-by-drone-fly-over
#18
Lucila Dunnington, Masami Nakagawa
Underground coal fires start naturally or as a result of human activities. Besides burning away the important non-renewable energy resource and causing financial losses, burning coal seams emit carbon dioxide, carbon monoxide, sulfur oxide and methane, and is a leading cause of smog, acid rain, global warming, and air toxins. In the U.S. alone, the combined cost of coal-fire remediation projects that have been completed, budgeted, or projected by the U.S. Department of the Interior's Office of Surface Mining Remediation and Enforcement (OSM), exceeds $1 billion...
October 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28580624/coupled-effects-of-wind-storms-and-drought-on-tree-mortality-across-115-forest-stands-from-the-western-alps-and-the-jura-mountains
#19
Katalin Csilléry, Georges Kunstler, Benoît Courbaud, Denis Allard, Pierre Lassegues, Klaus Haslinger, Barry Gardiner
Damage due to wind storms and droughts are increasing in many temperate forest, yet little is known about the long-term roles of these key climatic factors in forest dynamics and in the carbon budget. The objective of this study was to estimate individual and coupled effects of droughts and wind-storms on adult tree mortality across a 31-year period in 115 managed, mixed-coniferous forest stands from the Western Alps and the Jura mountains. For each stand, yearly mortality was inferred from management records, yearly drought from interpolated fields of monthly temperature, precipitation and soil water holding capacity, and wind-storms from interpolated fields of daily maximum wind-speed...
June 5, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28575781/estimation-of-global-soil-respiration-by-accounting-for-land-use-changes-derived-from-remote-sensing-data
#20
Minaco Adachi, Akihiko Ito, Seiichiro Yonemura, Wataru Takeuchi
Soil respiration is one of the largest carbon fluxes from terrestrial ecosystems. Estimating global soil respiration is difficult because of its high spatiotemporal variability and sensitivity to land-use change. Satellite monitoring provides useful data for estimating the global carbon budget, but few studies have estimated global soil respiration using satellite data. We provide preliminary insights into the estimation of global soil respiration in 2001 and 2009 using empirically derived soil temperature equations for 17 ecosystems obtained by field studies, as well as MODIS climate data and land-use maps at a 4-km resolution...
May 30, 2017: Journal of Environmental Management
keyword
keyword
56636
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"