The microbial aspect of climate change

Dutta, Himangshu; Dutta, Angshu

doi:10.1007/s40974-016-0034-7

Cited by 87 publications

(41 citation statements)

References 174 publications

(224 reference statements)

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“…Higher phytoplankton growth, bacterial production, and grazing pressure on bacteria were previously observed in sites directly affected by sea-ice melting compared to others that were unaffected, suggesting a substantial influence of the ice melting process on the productivity and the biogeochemistry of Arctic waters [10]. However, rapidly occurring changes induced by environmental variability in polar regions stimulate further research on the response of microbial communities, since the literature available on this issue is still far from being exhaustive [11,12].…”

Section: Introductionmentioning

confidence: 99%

Microbial Abundance and Enzyme Activity Patterns: Response to Changing Environmental Characteristics along a Transect in Kongsfjorden (Svalbard Islands)

Caruso

Madonia

Bonamano

et al. 2020

JMSE

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Svalbard archipelago is experiencing the effects of climate changes (i.e., glaciers' thickness reduction and glacier front retreat), but how ice melting affects water biogeochemistry is still unknown. Microbial communities often act as environmental sentinels, modulating their distribution and activity in response to environmental variability. To assess microbial response to climate warming, within the ARctic: present Climatic change and pAst extreme events (ARCA) project, a survey was carried out along a transect in Konsfjorden from off-shore stations towards the Kronebreen glacier. Total bacterial abundance and the fraction of actively respiring cells (labelled by cyanotetrazolium chloride, CTC), cultivable heterotrophic bacterial abundance, and extracellular enzymatic activities (leucine aminopeptidase (LAP), beta-glucosidase (GLU), and alkaline phosphatase (AP)) were measured. In addition, water temperature, salinity, dissolved oxygen, turbidity, total suspended matter (TSM), particulate and chromophoric dissolved organic matter (CDOM), chlorophyll-a (Chl-a), and inorganic compounds were determined, in order to evaluate whether variations in microbial abundance and metabolism were related with changes in environmental variables. Colder waters at surface (3.5–5 m) depths and increased turbidity, TSM, and inorganic compounds found at some hydrological stations close to the glacier were signals of ice melting. CDOM absorption slope values (275–295 nm) varied from 0.0077 to 0.0109 nm−1, and total bacterial cell count and cultivable heterotrophic bacterial abundance were in the order of 106 cells/mL and 103 colony forming units/mL, respectively. Enzymatic rates <1.78, 1.25, and 0.25 nmol/l/h were recorded for AP, LAP, and GLU, respectively. Inorganic compounds, TSM, and turbidity correlated inversely with temperature; AP was significantly related with CDOM absorption spectra and heterotrophic bacteria (r = 0.59, 0.71, P < 0.05); and LAP with Chl-a, Particulate Organic Carbon (POC) and Particulate Organic Nitrogen (PON) (0.97, 0.780, 0.734, P < 0.01), suggesting that fresh material from ice melting stimulated the metabolism of the cultivable fraction.

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Section: Introductionmentioning

confidence: 99%

Microbial Abundance and Enzyme Activity Patterns: Response to Changing Environmental Characteristics along a Transect in Kongsfjorden (Svalbard Islands)

Caruso

Madonia

Bonamano

et al. 2020

JMSE

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“…In environmentally sensitive Arctic areas, the magnitude of biotic change and its consequences on ecosystem services (Frainer et al, ; Vincent et al, ) require special attention. Globally, too little awareness has been paid to the effects of global warming on microbial life (Cavicchioli et al, ; Dutta & Dutta, ; Heger et al, ), which presents an urgent need to better understand the rules by which microbial assemblies are influenced and sustained. The term ‘assembly rules’ was introduced by Diamond in 1975 and different terminologies have developed since (Götzenberger et al, ).…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic diversity and environment form assembly rules for Arctic diatom genera—A study on recent and ancient sedimentary DNA

Stoof‐Leichsenring

Pestryakova

Epp

et al. 2020

Journal of Biogeography

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Aim: This study investigates taxonomic and phylogenetic diversity in diatom genera to evaluate assembly rules for eukaryotic microbes across the Siberian tree line. We first analysed how phylogenetic distance relates to taxonomic richness and turnover.Second, we used relatedness indices to evaluate if environmental filtering or competition influences the assemblies in space and through time. Third, we used distancebased ordination to test which environmental variables shape diatom turnover.Location: Yakutia and Taymyria, Russia: we sampled 78 surface sediments and a sediment core, extending to 7,000 years before present, to capture the forest-tundra transition in space and time respectively.Taxon: Arctic freshwater diatoms. Methods:We applied metabarcoding to retrieve diatom diversity from surface and core sedimentary DNA. The taxonomic assignment binned sequence types (lineages) into genera and created taxonomic (abundance of lineages within different genera) and phylogenetic datasets (phylogenetic distances of lineages within different genera).Results: Contrary to our expectations, we find a unimodal relationship between phylogenetic distance and richness in diatom genera. We discern a positive relationship between phylogenetic distance and taxonomic turnover in spatially and temporally distributed diatom genera. Furthermore, we reveal positive relatedness indices in diatom genera across the spatial environmental gradient and predominantly in time slices at a single location, with very few exceptions assuming effects of competition. Distancebased ordination of taxonomic and phylogenetic turnover indicates that lake environment variables, like HCO 3 − and water depth, largely explain diatom turnover. Main conclusion:Phylogenetic and abiotic assembly rules are important in understanding the regional assembly of diatom genera across lakes in the Siberian tree line ecotone. Using a space-time approach we are able to exclude the influence of geography and elucidate that lake environmental variables primarily shape the assemblies. We conclude that some diatom genera have greater capabilities to adapt toThis is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…This value clarified how the decomposition process occurred as an interrelated factor between organisms, the quality of organic material, and the environment (Kaffenberger and Schilling 2015;Krishna and Mohan 2017). Therefore, rate of decomposition could be quickly or slowly depending on the ready accessibility of the organism, and the availability of energy and carbon for biosynthesis (Zibilske and Bradford 2007;Dutta and Dutta 2016). Change of all properties measured in decomposed material after 8 weeks incubation for fungi with the highest result was decided as functional fungi, i.e.…”

Section: Lignocellulolytic Decomposition Effectivitymentioning

confidence: 97%

Exploring functional fungi on organic matter decomposition of oil palm empty bunches as bio-resource in land remediation

et al. 2020

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Abstract. Rasyid B, Ala A, Kuswinanti T, Sapareng S. 2020. Exploring functional fungi on organic matter decomposition of oil palm empty bunches as bio-resource in land remediation. Biodiversitas 21: 4247-4252. Organic matter of oil palm by-product has the potential to be applied for land remediation. The objective of this experiment was to explore functional fungi on the decomposition effectivity of oil palm empty bunches. Samples were collected from oil palm plantation fields and oil palm factory. Isolated fungi from decomposed material (trunks and rod) were Penicillium sp., Pleurotus sp., Fusarium sp., Chrysosporium sp., and Aspergillus sp. Fungi in the empty fruit branches were identified as Absidia sp., Tremella sp., and Trichoderma sp., Phytophthora sp., Ulocladium sp., and Chaetomium sp. Within all collected fungal isolates, Pleurotus sp., Trichoderma sp., and Tremella sp. were selected as functional fungi based on the results of the highest lignocellulolytic ability (50-75%). The degradation rate of organic matter of each functional fungi was observed as Trichoderma sp. (24.0%), Tremella sp. (20.0%), and Pleurotus sp. (16.0%). Change of C/N ratio as a result of decomposition showed significant difference compared to control with 22.09 by Trichoderma sp., 24.26 by Pleurotus sp., 26.68 by Tremella sp. and 36.58 in control. This study could be concluded that exploring functional fungi can potentially be applied in the decomposition of oil palm by-product effectively.

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The microbial aspect of climate change

Cited by 87 publications

References 174 publications

Microbial Abundance and Enzyme Activity Patterns: Response to Changing Environmental Characteristics along a Transect in Kongsfjorden (Svalbard Islands)

Microbial Abundance and Enzyme Activity Patterns: Response to Changing Environmental Characteristics along a Transect in Kongsfjorden (Svalbard Islands)

Phylogenetic diversity and environment form assembly rules for Arctic diatom genera—A study on recent and ancient sedimentary DNA

Exploring functional fungi on organic matter decomposition of oil palm empty bunches as bio-resource in land remediation

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