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The Fate and Transport of Allochthonous Blue Carbon in Divergent Coastal Systems
Published in Lisamarie Windham-Myers, Stephen Crooks, Tiffany G. Troxler, A Blue Carbon Primer, 2018
Thomas S. Bianchi, Elise Morrison, Savanna Barry, Ana R. Arellano, Rusty A. Feagin, Audra Hinson, Marian Eriksson, Mead Allison, Christopher L. Osburn, Diana Oviedo-Vargas
While mention of priming (or in some cases co-metabolism) effects can be found in the aquatic coastal literature, the concept has largely been supported by superficial or equivocal evidence (Bianchi et al., 2011). Poretsky et al. (2010) observed shifts in microbial expression of OC-transporter genes under variable inputs of algal and terrestrially derived OC, providing insight into the biological facilitation of priming processes, but did not address priming per se. Blanchet et al. (2016) and Guenet et al. (2014) made some of the first experimental observations of aquatic priming, but the implications of this effect on globally relevant CO2 fluxes remains unclear. Recently, Blanchet et al. (2016) investigated the effects of priming on bacterial community activity (BCA) and bacterial community composition (BCC), and found that different types of DOM could influence BCA and BCC, but did not find a clear priming effect within their experiment. However, there is currently no clear consensus on the role of aquatic priming. For example, recent studies have made observations of strong positive priming (Danger et al., 2013; Bianchi et al., 2015; Ward et al., 2016), no priming at all (Attermeyer et al., 2015), and negative priming effects (Gontikaki et al., 2013) in various settings.
Application of Biochar for Carbon Sequestration in Soils
Published in Vladimir Strezov, Hossain M. Anawar, Renewable Energy Systems from Biomass, 2018
Yani Kendra, Vladimir Strezov, Hossain M. Anawar
Biochar degradation is often evaluated as carbon lost through soil respiration or mineralization (Bird et al., 2017). The soil priming effect is related to mineralization, as it refers to the increase (positive priming) or decrease (negative priming) of microbial-induced carbon degradation and mineralization as a result of the addition of soil amendments, such as biochar (Cely et al., 2014). Therefore, biochar with a higher carbon-sequestering potential should exhibit lower mineralization and more negative or less positive priming effects when added to soil.
Biochar
Published in Amitava Rakshit, Manoj Parihar, Binoy Sarkar, Harikesh B. Singh, Leonardo Fernandes Fraceto, Bioremediation Science From Theory to Practice, 2021
Sumita Chandel, Ritika Joshi, Ashish Khandelwal
The increase in the rate of decomposition of organic matter with the addition of biochar or any other substance is known as the priming effect. This so-called priming effect complicates all the efforts to sequester carbon, as this leads to increase in microbial activity that results in faster rate of microbes decomposition compared to carbon input rates (Cooperman 2016).
Impact of agricultural management practices on soil carbon sequestration and its monitoring through simulation models and remote sensing techniques: A review
Published in Critical Reviews in Environmental Science and Technology, 2022
Agniva Mandal, Atin Majumder, S. S. Dhaliwal, A. S. Toor, Pabitra Kumar Mani, R. K. Naresh, Raj K. Gupta, Tarik Mitran
Bastida et al. (2019) found SOC content, soil types and climate play pivotal roles in regulating PE. Priming effects were found negative in more mesic sites with higher SOC contents while positive apparent PEs have been observed in more arid locations with low SOC contents. Positive apparent priming in soils under drier climates and with exhaustive land use (e.g. croplands, shrub lands etc) with low SOC contents might be due to nutrient limitations, lower proportion of macro-aggregates and presence of higher content of aerobic bacteria (Delgado-Baquerizo et al., 2017; Fontaine et al., 2004; Maestre et al., 2015). Conversely, tropical soils associated with higher OC content and high moisture generally exhibit higher abundance of facultative or anaerobic microorganisms that eventually lower SOC mineralization (Bastida et al., 2019; Santruckova et al., 2004). Biochar application also influences the PE which in turn affects the stability of soil C for a long run. According to Zimmerman et al. (2011) biochar exhibits negative priming effect by reducing the degradability of native organic matter via microbial decomposition as biochar may sequester native SOM within its pore network. Again, nutrient adsorption by biochar may also cause a reduction in nutrient availability for plant uptake in soils having low OC (El-Naggar, El-Naggar, et al., 2019; Kuppusamy et al., 2016). Contrarily, biochar might facilitate the microbial growth and proliferation by providing suitable habitat for microorganisms through supply of labile C, N, P and micronutrients (Chan & Xu, 2009). Thus, stimulation of soil C mineralization and improvement of nutrient availability to plants and microbes could be considered as positive priming effect (Luo, Liu, et al., 2017; Luo, Zang, et al., 2017). Abiotic factors, such as soil moisture content, texture, clay content and SOC content, and biotic factors, such as fungi/bacteria composition and the abundance of saprophytic fungi and soil animals (Wang et al., 2016) usually govern the biochar-induced priming effects depending on the initial soil properties and types of biochar feedstocks (El-Naggar, Lee, et al., 2018). Hence, priming effect of biochar amendments is still under debate (El-Naggar et al., 2015; El-Naggar, Lee, et al., 2018; Xu et al., 2018).