Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes

Rofner, Carina; Peter, Hannes; Catalán, Núria; Drewes, Fabian; Sommaruga, Rubén; Pérez, María Teresa

doi:10.1111/gcb.13545

Cited by 30 publications

(22 citation statements)

References 90 publications

(125 reference statements)

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“…The results of this study indicate that the microbial abundance and diversity of the alpine lake sediments in the Hengduan Mountains are quite high. The ACE, Chao1, and Shannon indices were higher than those in previous studies in the Gossenköllesee alpine lake in Austria (Rofner et al., ). This suggests that the sediments from alpine lakes in the Hengduan Mountains contain more microbial diversity than we expected, and sediment microorganisms in alpine lakes have a large reservoir of genetic variability.…”

Section: Resultscontrasting

confidence: 69%

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Microbial community composition in alpine lake sediments from the Hengduan Mountains

et al. 2019

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Microbial communities in sediments play an important role in alpine lake ecosystems. However, the microbial diversity and community composition of alpine lake sediments from the Hengduan Mountains remain largely unknown. Therefore, based on the Illumina MiSeq platform, high‐throughput sequencing analysis of the 16S rRNA gene was performed on 15 alpine lake sediments collected at different locations in the Hengduan Mountains. The abundance‐based coverage estimate (ACE), Chao1, and Shannon indices indicated that the microbial abundance and diversity of these sediments were high. There are some differences in the composition of microbial communities among sediments. However, in general, Proteobacteria accounted for the largest proportion of all sediments (22.3%–67.6%) and was the dominant phylum. Followed by Bacteroidetes, Acidobacteria, Chloroflexi, and Planctomycetes. In addition, the operational taxonomic unit (OTU) interactions network had modular structures and suggested more cooperation than competition in the microbial community. Besides, we also found that temperature has a significant contribution to the sample–environment relationship. This study revealed the diversity and composition of microbial communities in alpine lake sediments from the Hengduan Mountains, and describe the correlation between microbial community structure and different environmental variables.

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Section: Resultscontrasting

confidence: 69%

“…In addition, we know that Proteobacteria and Bacteroidetes mainly contribute to the community structure of alpine lakes (Rofner et al, 2017). Notably, members of the Acidobacteria are commonly found in freshwater sediments (Newton et al, 2011).…”

Section: Microbial Community Taxonomic Compositionmentioning

confidence: 99%

Microbial community composition in alpine lake sediments from the Hengduan Mountains

et al. 2019

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“…Since the climate of the subarctic mountain region is characterized by a relatively warm but short growing season, high growing season temperatures at low elevations may stimulate resource exploitation rate and growth rate that facilitate the high bacteria diversity. It should be noted, however, that temperature may also affect microbial communities indirectly through unmeasured local factors or biogeographical processes that are associated with elevation, such as the concentration of dissolved organic carbon (Karlsson, Jonsson, & Jansson, ; Rofner et al, ; Wang et al, ) or dispersal effects (Szekely & Langenheder, ). Nevertheless, the dominant roles of temperature at broad taxonomic scales (Figure a) are also consistent with the finding among macroorganisms showing that temperature is an important driver in the multitaxa community (Peters et al, ).…”

Section: Discussionmentioning

confidence: 99%

Elevational patterns and hierarchical determinants of biodiversity across microbial taxonomic scales

et al. 2019

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Microbial biogeography is gaining increasing attention due to recent molecular methodological advance. However, the diversity patterns and their environmental determinants across taxonomic scales are still poorly studied. By sampling along an extensive elevational gradient in subarctic ponds of Finland and Norway, we examined the diversity patterns of aquatic bacteria and fungi from whole community to individual taxa across taxonomic coverage and taxonomic resolutions. We further quantified cross‐phylum congruence in multiple biodiversity metrics and evaluated the relative importance of climate, catchment and local pond variables as the hierarchical drivers of biodiversity across taxonomic scales. Bacterial community showed significantly decreasing elevational patterns in species richness and evenness, and U‐shaped patterns in local contribution to beta diversity (LCBD). Conversely, no significant species richness and evenness patterns were found for fungal community. Elevational patterns in species richness and LCBD, but not in evenness, were congruent across bacterial phyla. When narrowing down the taxonomic scope towards higher resolutions, bacterial diversity showed weaker and more complex elevational patterns. Taxonomic downscaling also indicated a notable change in the relative importance of biodiversity determinants with stronger local environmental filtering, but decreased importance of climatic variables. This suggested that niche conservatism of temperature preference was phylogenetically deeper than that of water chemistry variables. Our results provide novel perspectives for microbial biogeography and highlight the importance of taxonomic scale dependency and hierarchical drivers when modelling biodiversity and species distribution responses to future climatic scenarios.

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“…Further, as climate change alters the composition of plant communities and their nutrient content ( 27 ; T. Seipel, S. L. Ishaq, and F. D. Menalled, submitted for publication), the composition of plant litter and residues is altered. This change in soil inputs, in turn, modifies plant-microbe relationships ( 28 – 30 ) and reduces the available nutrients recycled into soil ( 22 , 29 ).…”

Section: Introductionmentioning

confidence: 99%

Dryland Cropping Systems, Weed Communities, and Disease Status Modulate the Effect of Climate Conditions on Wheat Soil Bacterial Communities

Ishaq

Seipel

Yeoman

et al. 2020

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Little knowledge exists on how soil bacteria in agricultural settings are impacted by management practices and environmental conditions in current and predicted climate scenarios. We assessed the impact of soil moisture, soil temperature, weed communities, and disease status on soil bacterial communities in three cropping systems: (i) conventional no-till (CNT) systems utilizing synthetic pesticides and herbicides, (ii) USDA-certified tilled organic (OT) systems, and (iii) USDA-certified organic systems with sheep grazing (OG). Sampling date within the growing season and associated soil temperature and moisture exerted the greatest effect on bacterial communities, followed by cropping system, Wheat streak mosaic virus (WSMV) infection status, and weed community. Soil temperature was negatively correlated with bacterial richness and evenness, while soil moisture was positively correlated with bacterial richness and evenness. Soil temperature and soil moisture independently altered soil bacterial community similarity between treatments. Inoculation of wheat with WSMV altered the associated soil bacteria, and there were interactions between disease status and cropping system, sampling date, and climate conditions, indicating the effect of multiple stressors on bacterial communities in soil. In May and July, cropping system altered the effect of climate change on the bacterial community composition in hotter conditions and in hotter and drier conditions compared to ambient conditions, in samples not treated with WSMV. Overall, this study indicates that predicted climate modifications as well as biological stressors play a fundamental role in the impact of cropping systems on soil bacterial communities. IMPORTANCE Climate change is affecting global moisture and temperature patterns, and its impacts are predicted to worsen over time, posing progressively larger threats to food production. In the Northern Great Plains of the United States, climate change is forecast to increase temperature and decrease precipitation during the summer, and it is expected to negatively affect cereal crop production and pest management. In this study, temperature, soil moisture, weed communities, and disease status had interactive effects with cropping system on bacterial communities. As local climates continue to shift, the dynamics of above- and belowground associated biodiversity will also shift, which will impact food production and increase the need for more sustainable practices.

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Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes

Cited by 30 publications

References 90 publications

Microbial community composition in alpine lake sediments from the Hengduan Mountains

Microbial community composition in alpine lake sediments from the Hengduan Mountains

Elevational patterns and hierarchical determinants of biodiversity across microbial taxonomic scales

Dryland Cropping Systems, Weed Communities, and Disease Status Modulate the Effect of Climate Conditions on Wheat Soil Bacterial Communities

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