Microbial performance in soils along a salinity gradient under acidic conditions

Sardinha, Mafalda; Müller, Torsten; Schmeisky, H.; Joergensen, Rainer Georg

doi:10.1016/s0929-1393(03)00027-1

Cited by 269 publications

(153 citation statements)

References 47 publications

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“…Approximately 10 % of sequences in the present dataset belonged to the phylum Actinobacteria and it has previously been noted that many of the halophilic bacteria isolated from saline soils belong to this phylum (Sardinha et al 2003;Valenzuela-Encinas et al 2012). In one study, however, it was found that although Actinobacteria was represented in both medium and low saline soils, it was absent in extremely high saline soils (Valenzuela-Encinas et al 2009).…”

Section: Bacteriamentioning

confidence: 47%

A meta-analysis of the publicly available bacterial and archaeal sequence diversity in saline soils

Gong

2013

World J Microbiol Biotechnol

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An integrated view of bacterial and archaeal diversity in saline soil habitats is essential for understanding the biological and ecological processes and exploiting potential of microbial resources from such environments. This study examined the collective bacterial and archaeal diversity in saline soils using a meta-analysis approach. All available 16S rDNA sequences recovered from saline soils were retrieved from publicly available databases and subjected to phylogenetic and statistical analyses. A total of 9,043 bacterial and 1,039 archaeal sequences, each longer than 250 bp, were examined. The bacterial sequences were assigned into 5,784 operational taxonomic units (OTUs, based on C97 % sequence identity), representing 24 known bacterial phyla, with Proteobacteria (44.9 %), Actinobacteria (12.3 %), Firmicutes (10.4 %), Acidobacteria (9.0 %), Bacteroidetes (6.8 %), and Chloroflexi (5.9 %) being predominant. Lysobacter (12.8 %) was the dominant bacterial genus in saline soils, followed by Sphingomonas (4.5 %), Halomonas (2.5 %), and Gemmatimonas (2.5 %). Archaeal sequences were assigned to 602 OTUs, primarily from the phyla Euryarchaeota (88.7 %) and Crenarchaeota (11.3 %).Halorubrum and Thermofilum were the dominant archaeal genera in saline soils. Rarefaction analysis indicated that less than 25 % of bacterial diversity, and approximately 50 % of archaeal diversity, in saline soil habitats has been sampled. This analysis of the global bacterial and archaeal diversity in saline soil habitats can guide future studies to further examine the microbial diversity of saline soils.

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Section: Bacteriamentioning

confidence: 47%

A meta-analysis of the publicly available bacterial and archaeal sequence diversity in saline soils

Gong

2013

World J Microbiol Biotechnol

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“…Several studies showed that increasing salinity correspond to decreasing microorganism activity (van Bruggen and Semenov, 2000;Rietz and Haynes, 2003;Sardinha et al, 2003;Muhammad et al, 2006;Wichern et al, 2006). The results described herein are in line with these findings: in fact, daily percentages of mass loss recorded during the spring of 2012 in correspondence of higher levels of conductivity (Table 4) did not differ from the autumnal values and are significantly lower than those observed in the previous years ( Figure 3) and the gap between autumn and spring k-values was lower than the one observed for previous years (Figure 2c) with the spring value close to the limit between medium and fast decay rate classes reported by Petersen and Cummins (1974).…”

Section: Physical Chemical Data and Nutrientsmentioning

confidence: 99%

Seasonal and multi-annual patterns ofPhragmites australisdecomposition in a wetland of the Adriatic area (Northeast Italy): a three-years analysis

Bertoli

Brichese

Michielin

et al. 2016

Knowl. Manag. Aquat. Ecosyst.

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-Wetlands are one of the most biologically productive ecosystems, in which reedbeds of Phragmites australis are an essentially detritus-based system where litter decomposition is a fundamental process. This study represents a three year dataset describing cyclic trends of Phragmites australis leaf litter breakdown in a temporary and managed environment. For three years, 45 days field experiments were seasonally performed, using leaf bag technique within a large managed temporary pond (Natural Reserve of the Isonzo River Mouth, Northeast Italy), in order to analyze spatial and temporal variation in decomposition processes, to search for patterns on seasonal and inter-annual time scale and to infer the relevance of the main environmental features (physical and chemical) on decomposition dynamic. During the three years of analysis, decay rates (k) ranges were 0.0066-0.0075 days −1 in autumn, 0.0108-0.0158 days −1 in spring and k = 0.0168 days −1 in summer. Average mass loss per day % range was 0.97-1.31% in autumn, 1.12-2.04% in spring and 1.79-2.06% in summer. A well-defined seasonal cycle was observed through the study years as result of the drought-reflooding dynamic and the highest percentage (91.1%) of the average mass loss per day % variability was explained above all by rainfall, temperature and conductivity. Key-words:Leaf bag / wetland / seasonal dynamic / temporary pond / decomposition rate Résumé -Schémas saisonnier et pluriannuel de décomposition de Phragmites australis dans une zone humide de la région adriatique (Italie du Nord) : une étude de trois ans. Les zones humides sont parmi les écosystèmes les plus productifs, dont les roselières à Phragmites australis constituent un système basé essentiellement sur les détritus, où la décomposition de la litière représente un processus fondamental. Cette étude analyse un ensemble pluriannuel de données qui décrit les tendances cycliques relatives à la décomposition de Phragmites australis dans un milieu temporaire d'eau douce sujet à la gestion. Pendant trois ans, 45 jours d'expériences sur le terrain ont été effectués de façon saisonnière, en utilisant la technique du sac de feuilles dans un grand étang temporaire géré (Réserve Naturelle de l'embouchure de la rivière Isonzo, Italie du Nord), afin d'analyser les variations spatiales et temporelles dans les processus de décomposition, à la recherche de modèles à l'échelle temporelle saisonnière et inter-annuelle et d'en déduire la pertinence des principales caractéristiques environnementales (physiques et chimiques) sur la dynamique de la décomposition. Au cours des trois années d'analyse, les taux de décomposition (k) étaient 0,0066-0,0075 jours −1 à l'automne, 0,0108-0,0158 jours −1 au printemps et k = 0,0168 jours −1 en été. La perte moyenne de masse par jour était de 0,97 à 1,31 % en automne, 01,12 à 02,04 % au printemps et de 1,79 à 2,06 % en été. Un cycle saisonnier bien défini a été observé au cours des années d'études résultant de l'alternance assec-mise en eau. Le pourcentage le plus élevé (...

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“…Secondly, the presence of salts decreases water root uptake (Bohn et al, 1979;Aguirre, 1993;Pankhurts et al, 2001;Atlas & Bartha, 2002;Bernstein & Kafkafi, 1996;Haynes & Rietz, 2003). And thirdly, certain ions have a negative effect on the solubility of other ions and on microbial biomass activity, e.g., protein synthesis and respiration (Giambiagi & Lodeiro, 1989;Aguirre, 1993;Atlas & Bartha, 2002;Sardhina et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of 14C-labeled glucose and ammonium in saline arable soils

Vuelvas-Solórzano

Hernández-Matehuala

Conde-Barajas

et al. 2009

Rev. Bras. Ciênc. Solo

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SUMMARYOrganic matter dynamics and nutrient availability in saline agricultural soils of the State of Guanajuato might provide information for remediation strategies. 14 C labeled glucose with or without 200 mg kg -1 of NH 4 + -N soil was added to two clayey agricultural soils with different electrolytic conductivity (EC), i.e. 0.94 dS m -1 (low EC; LEC) and 6.72 dS m -1 (high EC; HEC), to investigate the effect of N availability and salt content on organic material decomposition. Inorganic N dynamics and production of CO 2 and 14 CO 2 were monitored. Approximately 60 % of the glucose-14 C added to LEC soil evolved as 14 CO 2 , but only 20 % in HEC soil after the incubation period of 21 days. After one day, < 200 mg 14 C was extractable from LEC soil, but > 500 mg 14 C from HEC soil. No N mineralization occurred in the LEC and HEC soils and glucose addition reduced the concentrations of inorganic N in unamended soil and soil amended with NH 4 + -N. The NO 2 -and NO 3 -concentrations were on average higher in LEC than in HEC soil, with exception of NO 2 -in HEC amended with NH 4 + -N. It was concluded that increases in soil EC reduced mineralization of the easily decomposable C substrate and resulted in Ndepleted soil.Index terms: dynamics of inorganic N, emission of 14 CO 2 and 12 CO 2 , saline soils. Os conhecimentos sobre a dinâmica da matéria orgânica e disponibilidade de nutrientes em solos salinos podem ser úteis para nortear a adoção de estratégias de recuperação e manejo. O objetivo deste trabalho foi avaliar o efeito da condutividade elétrica (EC) e presença de N inorgânico na decomposição da matéria orgânica a dois solos salinos localizados em Guanajuato (México). Nesse sentido, glicose marcada com 14 C com ou sem amônio na dose de 200 mg kg -1 de N foi adicionada em dois tipos de solo com valores de condutividade elétrica de 0,94 dS m -1 (baixo EC; LEC) e 6,72 dS m -1 (alta EC; HEC). Amostras de solos foram incubadas durante 21 dias e, ao longo desse tempo, foram avaliadas as concentrações de N inorgânico e a produção de 12 CO 2 e 14 CO 2 . Após o período de incubação, aproximadamente 60 % da glicose marcada com 14 C adicionado ao solo LEC evoluiu como 14 CO 2 , mas somente 20 % no solo HEC a evolução de 14 CO 2 foi de apenas 20 %. Decorrido um dia de incubação, menos de 200 mg de 14 C foram extraídos do solo LEC, ao passo que no solo HEC foram extraídos mais de 500 mg de 14 C. Não ocorreu mineralização de N nos dois solos e a adição de glicose reduziu as concentrações de N inorgânico no solo controle e no solo que recebeu N-NH 4 + . As concentrações de NO 2 -e NO 3 -foram, em média, maiores no solo LEC do que no solo HEC, com exceção do teor de NO 2 -, que foi maior no HEC tratado com NH 4 + . O aumento da condutividade elétrica promoveu a redução da mineralização de substrato facilmente decomponível e a diminuição do teor de N no solo.Termos de indexação: dinâmica de nitrogênio inorgânico, emissão de 12 CO 2 e 14 CO 2 , solos salinos.

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Microbial performance in soils along a salinity gradient under acidic conditions

Cited by 269 publications

References 47 publications

A meta-analysis of the publicly available bacterial and archaeal sequence diversity in saline soils

A meta-analysis of the publicly available bacterial and archaeal sequence diversity in saline soils

Seasonal and multi-annual patterns ofPhragmites australisdecomposition in a wetland of the Adriatic area (Northeast Italy): a three-years analysis

Dynamics of 14C-labeled glucose and ammonium in saline arable soils

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