PedobiologiaPub Date : 2023-09-09DOI: 10.1016/j.pedobi.2023.150907
Yufita Dwi Chinta , Hajime Araki
{"title":"Responses of bulk and rhizosphere soil microbiomes to different cover crop inputs and their connection and contribution to soil fertility and plant growth","authors":"Yufita Dwi Chinta , Hajime Araki","doi":"10.1016/j.pedobi.2023.150907","DOIUrl":"https://doi.org/10.1016/j.pedobi.2023.150907","url":null,"abstract":"<div><p><span><span>Bulk and rhizosphere soil </span>microbiomes may be naturally linked and exhibit unique responses to different cover crop inputs during the early decomposition process. However, their relationship and contribution to </span>soil carbon<span><span><span> and nitrogen levels and plant growth during the decomposition process remain unclear. Herein, we performed a pot-based experiment to investigate the interactive effects of cover crops (rye, hairy vetch<span> [HV], and a mixture of rye and HV [mix]) and soil microbial habitats (bulk and rhizosphere soils) on the microbial community. Additionally, we identified the hub taxa and evaluated their contributions to the microbial community, </span></span>soil fertility<span><span>, and plant growth. Lettuce was grown in soil exposed to control, rye, HV, or mixed cover crops. Bacterial 16S rRNA) and fungal (ITS) community structures were characterized in bulk and rhizosphere soils of lettuce plants using a DNA-based molecular approach. The results showed that cover crops and soil microbial habitats independently affected microbial community structures; the relative abundances of fungi and bacteria, known as decomposers in bulk soil and plant growth-promoting bacteria in rhizosphere soil, increased. The hub taxa under each treatment represented specific groups that connect bulk and rhizosphere microbiomes. Based on Mantel statistical analysis, hub taxa may maintain the bulk soil microbiome, within which the </span>bacterial community in HV and mix treatments may contribute to the nitrogen supply from cover </span></span>crop residues<span>. Additionally, the bacterial community in rhizosphere soil in HV and mix treatments may contribute to nitrogen absorption by lettuce plants. These results add to the understanding of the early process of sustainable agriculture using cover crops.</span></span></p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"101 ","pages":"Article 150907"},"PeriodicalIF":2.3,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49868242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PedobiologiaPub Date : 2023-09-01DOI: 10.1016/j.pedobi.2023.150892
A.F. Krediet , J. Ellers , M.P. Berg
{"title":"Collembola community contains larger species in frequently flooded soil","authors":"A.F. Krediet , J. Ellers , M.P. Berg","doi":"10.1016/j.pedobi.2023.150892","DOIUrl":"10.1016/j.pedobi.2023.150892","url":null,"abstract":"<div><p>Climate change is increasingly affecting biotic communities, including soil fauna. Extreme weather events such as the incidence of heavy rainfall or prolonged drought can cause strong fluctuations in soil moisture. In river floodplains such extreme events determine the flooding intensity of the river bank grassland soils, and their communities. The diversity and distribution of many soil fauna groups depends on soil moisture content, so changes in inundation frequency and duration will impact soil fauna communities. We used the natural fluctuations in water levels of large Dutch rivers to investigate the effect of flooding intensity on the composition and traits of Collembola species, a key group of the soil fauna community. At five locations along large rivers in The Netherlands, we sampled Collembola communities at six levels of decreasing elevation and increasing flooding intensity. We identified all Collembola to species level and calculated species richness, composition and abundance values. Moreover, to understand the observed taxonomic changes across elevation we used the traits body size and life form to explain the change in Collembola community composition. Our results show that high flooding intensity favors larger Collembola species in the community. We hypothesize that high soil moisture in frequently flooded soil favors larger Collembola, which tolerate flooding. Life form, i.e. the preferred depth in the soil column, was significantly correlated with flooding intensity. There is an optimum in species richness and abundance at intermediate flooding intensity. These results can help predict the impact of climate change on soil fauna.</p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"99 ","pages":"Article 150892"},"PeriodicalIF":2.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48332712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PedobiologiaPub Date : 2023-09-01DOI: 10.1016/j.pedobi.2023.150890
Taiki Mori
{"title":"A simple dynamic equilibrium model shows that high phosphatase activity in tropical forest soils could be explained by rapid microbial turnover","authors":"Taiki Mori","doi":"10.1016/j.pedobi.2023.150890","DOIUrl":"10.1016/j.pedobi.2023.150890","url":null,"abstract":"<div><p><span>Microorganisms<span> and plant roots secrete phosphatase to obtain phosphorus (P) by degrading organic P. Previous studies have reported high phosphatase activity in tropical </span></span>forest soils, which has been attributed to poor soil P conditions. However, rapid microbial turnover in tropical forest soils can also contribute to the high soil phosphatase activity. To test this, a simplified dynamic equilibrium model was developed. This model was intentionally designed to exclude the pathways of P originating from rock weathering or P adsorption by soils, with the aim of assessing the specific effect of accelerated microbial turnover on soil phosphatase activity. This model showed that accelerated microbial turnover consistently leads to elevated phosphatase activity, irrespective of the parameters, under the assumed environmental condition with the same litter P input. This suggests that rapid soil microbial turnover may serve as another crucial factor contributing to the high phosphatase activity in tropical forest soils, where both moisture and temperature are high.</p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"99 ","pages":"Article 150890"},"PeriodicalIF":2.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49244719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PedobiologiaPub Date : 2023-09-01DOI: 10.1016/j.pedobi.2023.150893
André Ampuero , Fátima Rivera , Sarita Olórtegui , Carlos Martel
{"title":"Feeding behaviour and food preferences of native and introduced snail species from the Lomas formations, threatened seasonal fog oases","authors":"André Ampuero , Fátima Rivera , Sarita Olórtegui , Carlos Martel","doi":"10.1016/j.pedobi.2023.150893","DOIUrl":"10.1016/j.pedobi.2023.150893","url":null,"abstract":"<div><p><span>The Lomas formations are ephemeral seasonal oases found along the Pacific arid coast of South America. Whereas fast-growing plants are characteristic in the Lomas, other organisms such as land snails are also conspicuous. In the Lomas, several snails can occur sympatrically and therefore they might have adapted their food requirements to the limited available items while avoiding competing for food (resource partitioning). Since the dietary items and food preferences of Lomas’ snails are almost completely unknown, our study aimed to document these in three snails occurring sympatrically, two native (</span><em>Succinea peruviana</em> and <em>Bostryx conspersus</em>) and one introduced (<em>Cornu aspersum</em>) species in Lomas de Lucumo, a threatened Lomas from Central Peru. We recorded the snails’ activity, host, and food items. We also carried out dual-choice bioassays to evaluate the feeding preferences of <em>B. conspersus</em> and <em>C. aspersum</em> when offered leaf disks of the two dominant plant Lomas species, <span><em>Senecio</em><em> abadianus</em></span> and <em>Sicyos baderoa</em>. Whereas we were unable to record any food item used by <em>C. aspersum</em>, we recorded the two native Lomas species (<em>B. conspersus</em> and <em>S. peruviana</em>) having contrasting patterns of feeding as they were on different hosts (plants vs soil) and food items (vascular plants vs. lichens/organic material/mosses/algae). Although the feeding preferences were similar between <em>B. conspersus</em> and <em>C. aspersum</em> (i.e., both species preferred the leaves of <em>Si. baderoa</em> over <em>Se. abadianus</em>), <em>C. aspersum</em>, after feeding stimulation, consumed significantly less leaf area of <em>Se. abadianus</em> than <em>B. conspersus</em>. <em>Sicyos</em> individuals are fast-growing plants and might be less herbivore-resistant, while <em>Senecio</em> species are characterized to produce defensive alkaloids which make plants less palatable. Our results indicate that Lomas’ snail species have evolved distinct trophic niches by partitioning the limited food resources and native herbivorous species are better adapted to feed on Lomas’ native plants given their common evolutionary history.</p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"99 ","pages":"Article 150893"},"PeriodicalIF":2.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44432153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PedobiologiaPub Date : 2023-09-01DOI: 10.1016/j.pedobi.2023.150895
Hennariikka Mäenpää, Merja Elo, Tommi Vuori, Sara Calhim
{"title":"The effects of sample storage duration on tardigrade density and community composition in moss samples","authors":"Hennariikka Mäenpää, Merja Elo, Tommi Vuori, Sara Calhim","doi":"10.1016/j.pedobi.2023.150895","DOIUrl":"10.1016/j.pedobi.2023.150895","url":null,"abstract":"<div><p>In studies on micrometazoans, sample storage and processing methods are mostly decided based on sample quality (e.g., substrate type and moisture level), and the choice of methods may affect the reliability of the data. However, these methods are poorly studied and rarely reported in detail. Our aim was to determine the methodological compromise between efficiency and reliability required for large-scale quantitative meiofaunal ecological studies. Specifically, we tested whether storage duration (necessary for large number of samples) affects the density or community composition of tardigrades in moss samples. We focus on a largely unexplored limnoterrestrial ecosystem – boreal peatlands, where moss moisture levels are naturally variable across different microhabitats and moss species. We collected seven moss samples from a peatland in Central Finland, kept them in a refrigerator and extracted tardigrades using the Baermann wet funnel at 1, 24, 48 and 96 h post sampling. We found a significant decrease in tardigrade density (32 % on average), but no changes in community composition, after the first 24 h of storage. Based on these results, we recommend that samples collected from wet limnoterrestrial habitats should be processed within 24 h to ensure accuracy and comparability of large-scale quantitative data on tardigrade ecology.</p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"99 ","pages":"Article 150895"},"PeriodicalIF":2.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41611532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PedobiologiaPub Date : 2023-09-01DOI: 10.1016/j.pedobi.2023.150894
F.A. Rutigliano, R. Marzaioli, E. Grilli, E. Coppola, S. Castaldi
{"title":"Microbial, physical and chemical indicators together reveal soil health changes related to land cover types in the southern European sites under desertification risk","authors":"F.A. Rutigliano, R. Marzaioli, E. Grilli, E. Coppola, S. Castaldi","doi":"10.1016/j.pedobi.2023.150894","DOIUrl":"10.1016/j.pedobi.2023.150894","url":null,"abstract":"<div><p><span>Soil microbial communities<span><span>, which play a key role in the provision of essential ecosystem services, are significantly influenced by several physical and chemical soil properties that may change with land management. This study explores the effect of different land cover types (coniferous tree stands, broad-leaved stands, shrublands, pastures/grasslands and croplands) on physical, chemical and microbial properties (all contributing to soil health) in southern European areas under moderate-high </span>desertification<span> risk selected in Italy, Spain and Portugal. In sites that differ in land cover, we determined microbial biomass (C</span></span></span><sub>mic</sub><span>), activity and indices of microbial metabolism including C</span><sub>mic</sub>/C<sub>org</sub> ratio, metabolic quotient (qCO<sub>2</sub><span><span>) and quotient of mineralization (qM). Soil physical and chemical properties were also measured, comprising bulk density (BD), water content (WC), pH, </span>cation exchange capacity (CEC), total organic C (C</span><sub>org</sub>) and some of its labile fractions, extractable C (C<sub>ext</sub>) and mineralizable C (C<sub>min</sub>), total N content and C/N. Results showed that land cover type played a strong role in determining magnitude of microbial variables with biomass and activity being higher under coniferous tree cover than in other land covers, according to trends in WC, CEC, C<sub>org</sub><sub>,</sub> C<sub>ext</sub>, C<sub>min</sub>, N, C/N. Compared to land cover, aridity index had lower effect on investigated variables. In comparison to sites with higher C<sub>org</sub> content, sites with lower C<sub>org</sub> content (most croplands) tended to lose C more rapidly, as suggested by high qM values, except for Spanish acidic soils. Therefore, urgent actions must be taken to counteract the tendency of C-poorer soils to lose C, promoting land cover types that facilitate soil recovery by ensuring denser and more continuous soil cover over time. We also identified a minimum set of soil variables that provide information on soil health changes in both short term (microbial variables) and longer term (physical and chemical variables) in areas under desertification risk.</p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"99 ","pages":"Article 150894"},"PeriodicalIF":2.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47736620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PedobiologiaPub Date : 2023-09-01DOI: 10.1016/j.pedobi.2023.150888
Danilo López-Hernández
{"title":"Termite mound as nutrient hot-spots in savannah with emphasis in P cycling and the potential use of mounds as soil amendment","authors":"Danilo López-Hernández","doi":"10.1016/j.pedobi.2023.150888","DOIUrl":"10.1016/j.pedobi.2023.150888","url":null,"abstract":"<div><p><span><span><span>Termites are an important component of pedofauna and are mainly distributed in subtropical and tropical areas. Their main effect on ecosystems is linked to the construction of tunnels, galleries, mounds, and nests. Termites induce strong changes in the physical-chemical and biological properties of the soil, after and through the processes of decomposition of the organic matter and formation of </span>biogenic structures. At sites with abundant termite populations, galleries and foraging holes enhance </span>soil porosity<span> and infiltration<span> rates, thus reducing soil bulk density. Termite activities result in nutrient accumulation in mounds; therefore, abundant termite populations could play an important role in controlling nutrient cycling in savannahs, where nutrients, particularly phosphorus (P), can often be a limiting factor. Regarding the high nutrient concentration accumulated in termite mounds, authors have claimed that parts of termite mounds could have potential as fertilisers for cultivated soils, and indeed, the use of termite materials for soil improvement is an extended practice in rural, poor, indigenous communities of Africa and Asia. This paper reviews the published data on the accumulation of the nutrients, mainly P in the soil of termite mounds in comparison with the none modified soil, and evaluates the potential use of termite biostructures in soil improvement. While it is true that in greenhouse experiments and in home orchards it is possible to observe the benefit of termite mound treatments, the implementation of such practices on a larger scale is prevented by the low ratio (by weight) of termite nests with respect to the total weight of the soil, as well as by the relatively long rate of renewal of termite mounds once destroyed. However, the use of large structure of </span></span></span><span><em>Macrotermes</em></span>, appears to be justified in a low-input agro-ecological scheme to promote the enhancement of termite-mediated ecosystem services.</p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"99 ","pages":"Article 150888"},"PeriodicalIF":2.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45795705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PedobiologiaPub Date : 2023-09-01DOI: 10.1016/j.pedobi.2023.150887
Taiki Mori , Xiankai Lu , Cong Wang , Qinggong Mao , Senhao Wang , Wei Zhang , Jiangming Mo
{"title":"Microbial P limitation in tropical forest soils could be overestimated: Insight from a sorption experiment and a meta-analysis","authors":"Taiki Mori , Xiankai Lu , Cong Wang , Qinggong Mao , Senhao Wang , Wei Zhang , Jiangming Mo","doi":"10.1016/j.pedobi.2023.150887","DOIUrl":"10.1016/j.pedobi.2023.150887","url":null,"abstract":"<div><p><span>The prevailing paradigm for soil microbial activity in tropical forests is that microbial activity is limited by phosphorus (P) availability, and thus exogenous P addition stimulates organic matter decomposition. This idea has been testified by studies demonstrating that experimental P addition accelerates </span>soil respiration<span><span><span>. Contrary to this conventional view, we hypothesize that the increased rates of soil microbial respiration could be due to the release of organic material from the surface of </span>soil minerals<span><span> when P is added, because P competes with organic C for binding sites in soil particles. Here we performed a sorption experiment in a tropical </span>evergreen forest in southern China, where P addition had previously been reported to stimulate soil respiration but suppressed leaf </span></span>litter decomposition<span>. P addition to soils significantly increased dissolved organic carbon (DOC) content, which was extracted immediately after P addition and under a cold temperature where microbial activity was suppressed. This result can explain why P addition stimulated soil respiration but not litter decomposition in our study site. Namely, P addition abiotically elevated microbially-available C through the release of organic matter from the soil mineral surface. We also conducted a meta-analysis using data obtained in forest ecosystems, demonstrating that previous studies have consistently reported that P addition led to higher response ratios of soil microbial respiration than litter decomposition. Our findings suggest that the prevailing paradigm (i.e., soil microbial activity in tropical forests is limited by P availability) might require re-evaluation.</span></span></p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"99 ","pages":"Article 150887"},"PeriodicalIF":2.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43552046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reintroduction of threatened digging mammals influences soil microbial communities differently along a rainfall gradient","authors":"Orsi Decker , Eleonora Egidi , Anna J.M. Hopkins , Melissa Danks , Heloise Gibb","doi":"10.1016/j.pedobi.2023.150889","DOIUrl":"https://doi.org/10.1016/j.pedobi.2023.150889","url":null,"abstract":"<div><p>Ecosystem engineers<span> influence co-existing species indirectly, through their modification of habitat conditions, so the loss of these species may have broad consequences for ecosystems globally. Digging mammals alter soil via soil turnover, habitat modification and mycophagy. However, we have a limited understanding of their impacts in different environments. In a continent-scale study spanning 3000 km across southern Australia, we asked whether reintroductions of native digging mammals affect soil microbial communities<span><span> in the soil matrix outside of their diggings, and if those impacts depend on the environmental context? We used high through-put sequencing analysis of bacterial and fungal environmental DNA to measure soil </span>microbial diversity<span> and community structure inside and outside digging mammal reintroduction areas at five reserves along a rainfall gradient from 166 to 877 mm per year, covering arid, semi-arid and temperate systems. Bacterial observed richness was not different inside and outside of the reserves; in contrast, fungal richness was higher in reserves, but only in arid and semi-arid environments. Fungal saprotrophs were more abundant in reserves: the mixing of soil layers mediated by digging mammals might therefore enhance decomposition. However, crust-forming microbes and ectomycorrhizal fungi were lower in abundance inside reserves, likely due to the disturbance and the altered soil nutrients that resulted from digging activity. Impacts of digging mammals varied among ecosystems which highlights the need for managers to consider the ecological context of reintroductions of ecosystem engineers when restoring for ecological functions.</span></span></span></p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"99 ","pages":"Article 150889"},"PeriodicalIF":2.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49874329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Methane consumption under the influence of different nitrogen sources in a tropical soil ecosystem","authors":"Bharati Kollah , Himanshi Verma , Rakesh Parmar , Mayanglambam Homeshwari Devi , Nagvanti Atoliya , Apekcha Bajpai , K.C. Shinoji , Amar Bahadur Singh , Ashok Patra , Devendra Jain , Garima Dubey , Santosh Ranjan Mohanty","doi":"10.1016/j.pedobi.2023.150891","DOIUrl":"10.1016/j.pedobi.2023.150891","url":null,"abstract":"<div><p>In order to minimize methane (CH<sub>4</sub>) concentration in the atmosphere we need to better understand CH<sub>4</sub><span> consumption in agricultural soils<span><span>. Nitrogen application to agriculture is predicted to increase significantly in the coming years to meet food security needs. However, the interaction between </span>soil nitrogen and CH</span></span><sub>4</sub> consumption is poorly understood. Experiments were carried out to evaluate CH<sub>4</sub> consumption under the influence of the three nitrogen sources comprising N<sub>2</sub>(at ambient+5% and ambient+10%),NO<sub>3</sub>-N (at 10 mM and 20 mM) and NH<sub>4</sub>-N (at 10 mM and 20 mM). CH<sub>4</sub> consumption was evaluated at different CH<sub>4</sub> concentrations and feeding cycles to validate the effect of nitrogen. Among different N sources, N<sub>2</sub> stimulated CH<sub>4</sub> consumption potential by about 1.11–1.71 times over that in the absence of additional nitrogen (control), while N in the form of both NO<sub>3</sub> and NH<sub>4</sub> inhibited CH<sub>4</sub> consumption by 1.14–2.18 times than in the control. CH<sub>4</sub> consumption rate increased with CH<sub>4</sub> feeding cycles. The effect of N sources on CH<sub>4</sub> consumption followed similar trends irrespective of the N rate added.N<sub>2</sub> stimulated the abundance of both <em>nifH</em> and <em>pmoA</em><span> genes. Abundance of methanotrophs </span><em>pmoA</em> gene copies and nitrifiers <span><em>amoA</em></span> gene copies were more in NH<sub>4</sub>-Namended soil than NO<sub>3</sub>-N.Available NO<sub>3</sub> content in soil increased 9–30% with CH<sub>4</sub> driven N<sub>2</sub> fixation. This study concludes that N<sub>2</sub> stimulated CH<sub>4</sub> consumption while nitrogen in the form of NO<sub>3</sub> and NH<sub>4</sub> inhibited CH<sub>4</sub><span> consumption in a tropical vertisol.</span></p></div>","PeriodicalId":49711,"journal":{"name":"Pedobiologia","volume":"99 ","pages":"Article 150891"},"PeriodicalIF":2.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47889600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}