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3,867 results on '"Richter, Andreas"'

6. Microbiome assembly in thawing permafrost and its feedbacks to climate

Author

Ernakovich, Jessica G, Barbato, Robyn A, Rich, Virginia I, Schädel, Christina, Hewitt, Rebecca E, Doherty, Stacey J, Whalen, Emily D, Abbott, Benjamin W, Barta, Jiri, Biasi, Christina, Chabot, Chris L, Hultman, Jenni, Knoblauch, Christian, Vetter, Maggie CY Lau, Leewis, Mary‐Cathrine, Liebner, Susanne, Mackelprang, Rachel, Onstott, Tullis C, Richter, Andreas, Schütte, Ursel ME, Siljanen, Henri MP, Taş, Neslihan, Timling, Ina, Vishnivetskaya, Tatiana A, Waldrop, Mark P, and Winkel, Matthias

Subjects
Microbiology, Biological Sciences, Ecology, Climate Action, Arctic Regions, Feedback, Microbiota, Permafrost, Phylogeny, Soil, Environmental Sciences, Biological sciences, Earth sciences, Environmental sciences
Abstract

The physical and chemical changes that accompany permafrost thaw directly influence the microbial communities that mediate the decomposition of formerly frozen organic matter, leading to uncertainty in permafrost-climate feedbacks. Although changes to microbial metabolism and community structure are documented following thaw, the generality of post-thaw assembly patterns across permafrost soils of the world remains uncertain, limiting our ability to predict biogeochemistry and microbial community responses to climate change. Based on our review of the Arctic microbiome, permafrost microbiology, and community ecology, we propose that Assembly Theory provides a framework to better understand thaw-mediated microbiome changes and the implications for community function and climate feedbacks. This framework posits that the prevalence of deterministic or stochastic processes indicates whether the community is well-suited to thrive in changing environmental conditions. We predict that on a short timescale and following high-disturbance thaw (e.g., thermokarst), stochasticity dominates post-thaw microbiome assembly, suggesting that functional predictions will be aided by detailed information about the microbiome. At a longer timescale and lower-intensity disturbance (e.g., active layer deepening), deterministic processes likely dominate, making environmental parameters sufficient for predicting function. We propose that the contribution of stochastic and deterministic processes to post-thaw microbiome assembly depends on the characteristics of the thaw disturbance, as well as characteristics of the microbial community, such as the ecological and phylogenetic breadth of functional guilds, their functional redundancy, and biotic interactions. These propagate across space and time, potentially providing a means for predicting the microbial forcing of greenhouse gas feedbacks to global climate change.

Published
2022

14. Identification of inulin-responsive bacteria in the gut microbiota via multi-modal activity-based sorting

Author

Riva, Alessandra, Rasoulimehrabani, Hamid, Cruz-Rubio, José Manuel, Schnorr, Stephanie L., von Baeckmann, Cornelia, Inan, Deniz, Nikolov, Georgi, Herbold, Craig W., Hausmann, Bela, Pjevac, Petra, Schintlmeister, Arno, Spittler, Andreas, Palatinszky, Márton, Kadunic, Aida, Hieger, Norbert, Del Favero, Giorgia, von Bergen, Martin, Jehmlich, Nico, Watzka, Margarete, Lee, Kang Soo, Wiesenbauer, Julia, Khadem, Sanaz, Viernstein, Helmut, Stocker, Roman, Wagner, Michael, Kaiser, Christina, Richter, Andreas, Kleitz, Freddy, and Berry, David

Published
2023
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36. The influence of vegetation drought stress on formaldehyde and ozone distributions over a central European city

Author

Trimmel, Heidelinde, Hamer, Paul, Mayer, Monika, Schreier, Stefan F., Weihs, Philipp, Eitzinger, Josef, Sandén, Hans, Fitzky, Anne Charlott, Richter, Andreas, Calvet, Jean-Christophe, Bonan, Bertrand, Meurey, Catherine, Vallejo, Islen, Eckhardt, Sabine, Santos, Gabriela Sousa, Oumami, Safae, Arteta, Joaquim, Marécal, Virginie, Tarrasón, Leonor, Karl, Thomas, and Rieder, Harald E.

Published
2023
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38. Increased microbial growth, biomass, and turnover drive soil organic carbon accumulation at higher plant diversity

Author

Prommer, Judith, Walker, Tom WN, Wanek, Wolfgang, Braun, Judith, Zezula, David, Hu, Yuntao, Hofhansl, Florian, and Richter, Andreas

Subjects
Life Below Water, Affordable and Clean Energy, Biomass, Carbon, Germany, Soil, Soil Microbiology, microbial activity, microbial carbon use efficiency, microbial necromass, microbial turnover, plant diversity, soil organic carbon, Environmental Sciences, Biological Sciences, Ecology
Abstract

Species-rich plant communities have been shown to be more productive and to exhibit increased long-term soil organic carbon (SOC) storage. Soil microorganisms are central to the conversion of plant organic matter into SOC, yet the relationship between plant diversity, soil microbial growth, turnover as well as carbon use efficiency (CUE) and SOC accumulation is unknown. As heterotrophic soil microbes are primarily carbon limited, it is important to understand how they respond to increased plant-derived carbon inputs at higher plant species richness (PSR). We used the long-term grassland biodiversity experiment in Jena, Germany, to examine how microbial physiology responds to changes in plant diversity and how this affects SOC content. The Jena Experiment considers different numbers of species (1-60), functional groups (1-4) as well as functional identity (small herbs, tall herbs, grasses, and legumes). We found that PSR accelerated microbial growth and turnover and increased microbial biomass and necromass. PSR also accelerated microbial respiration, but this effect was less strong than for microbial growth. In contrast, PSR did not affect microbial CUE or biomass-specific respiration. Structural equation models revealed that PSR had direct positive effects on root biomass, and thereby on microbial growth and microbial biomass carbon. Finally, PSR increased SOC content via its positive influence on microbial biomass carbon. We suggest that PSR favors faster rates of microbial growth and turnover, likely due to greater plant productivity, resulting in higher amounts of microbial biomass and necromass that translate into the observed increase in SOC. We thus identify the microbial mechanism linking species-rich plant communities to a carbon cycle process of importance to Earth's climate system.

Published
2020

39. A systemic overreaction to years versus decades of warming in a subarctic grassland ecosystem.

Author

Walker, Tom WN, Janssens, Ivan A, Weedon, James T, Sigurdsson, Bjarni D, Richter, Andreas, Peñuelas, Josep, Leblans, Niki IW, Bahn, Michael, Bartrons, Mireia, De Jonge, Cindy, Fuchslueger, Lucia, Gargallo-Garriga, Albert, Gunnarsdóttir, Gunnhildur E, Marañón-Jiménez, Sara, Oddsdóttir, Edda S, Ostonen, Ivika, Poeplau, Christopher, Prommer, Judith, Radujković, Dajana, Sardans, Jordi, Sigurðsson, Páll, Soong, Jennifer L, Vicca, Sara, Wallander, Håkan, Ilieva-Makulec, Krassimira, and Verbruggen, Erik

Subjects
Soil, Ecosystem, Climate Change, Carbon Cycle, Grassland
Abstract

Temperature governs most biotic processes, yet we know little about how warming affects whole ecosystems. Here we examined the responses of 128 components of a subarctic grassland to either 5-8 or >50 years of soil warming. Warming of >50 years drove the ecosystem to a new steady state possessing a distinct biotic composition and reduced species richness, biomass and soil organic matter. However, the warmed state was preceded by an overreaction to warming, which was related to organism physiology and was evident after 5-8 years. Ignoring this overreaction yielded errors of >100% for 83 variables when predicting their responses to a realistic warming scenario of 1 °C over 50 years, although some, including soil carbon content, remained stable after 5-8 years. This study challenges long-term ecosystem predictions made from short-term observations, and provides a framework for characterization of ecosystem responses to sustained climate change.

Published
2020

40. Substantial contribution of iodine to Arctic ozone destruction

Author

Benavent, Nuria, Mahajan, Anoop S., Li, Qinyi, Cuevas, Carlos A., Schmale, Julia, Angot, Hélène, Jokinen, Tuija, Quéléver, Lauriane L. J., Blechschmidt, Anne-Marlene, Zilker, Bianca, Richter, Andreas, Serna, Jesús A., Garcia-Nieto, David, Fernandez, Rafael P., Skov, Henrik, Dumitrascu, Adela, Simões Pereira, Patric, Abrahamsson, Katarina, Bucci, Silvia, Duetsch, Marina, Stohl, Andreas, Beck, Ivo, Laurila, Tiia, Blomquist, Byron, Howard, Dean, Archer, Stephen D., Bariteau, Ludovic, Helmig, Detlev, Hueber, Jacques, Jacobi, Hans-Werner, Posman, Kevin, Dada, Lubna, Daellenbach, Kaspar R., and Saiz-Lopez, Alfonso

Published
2022
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47. Microorganisms in subarctic soils are depleted of ribosomes under short-, medium-, and long-term warming

Author

Söllinger, Andrea, primary, Ahlers, Laureen S, additional, Dahl, Mathilde Borg, additional, Sigurðsson, Páll, additional, de Carlan, Coline Le Noir, additional, Bhattarai, Biplabi, additional, Gall, Christoph, additional, Martin, Victoria S, additional, Rottensteiner, Cornelia, additional, Motleleng, Liabo L, additional, Breines, Eva Marie, additional, Verbruggen, Erik, additional, Ostonen, Ivika, additional, Sigurdsson, Bjarni D, additional, Richter, Andreas, additional, and Tveit, Alexander T, additional

Published
2024
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49. Microbial life‐history strategies mediate microbial carbon pump efficacy in response to N management depending on stoichiometry of microbial demand

Author

Yang, Liyang, primary, Canarini, Alberto, additional, Zhang, Wushuai, additional, Lang, Ming, additional, Chen, Yuanxue, additional, Cui, Zhenling, additional, Kuzyakov, Yakov, additional, Richter, Andreas, additional, Chen, Xinping, additional, Zhang, Fusuo, additional, and Tian, Jing, additional

Published
2024
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