1. Phosphorus limitation promotes soil carbon storage in a boreal forest exposed to long-term nitrogen fertilizationEtienne Richy, Tania Fort, Inaki Odriozola, Petr Kohout, Florian Barbi, Tijana Martinović, Boris Tupek, Bartosz Adamczyk, Aleksi Lehtonen, Raisa Mäkipää, Petr Baldrian, 2024, izvirni znanstveni članek Povzetek: Forests play a crucial role in global carbon cycling by absorbing and storing significant amounts of atmospheric carbon dioxide. Although boreal forests contribute to approximately 45% of the total forest carbon sink, tree growth and soil carbon sequestration are constrained by nutrient availability. Here, we examine if long-term nutrient input enhances tree productivity and whether this leads to carbon storage or whether stimulated microbial decomposition of organic matter limits soil carbon accumulation. Over six decades, nitrogen, phosphorus, and calcium were supplied to a Pinus sylvestris-dominated boreal forest. We found that nitrogen fertilization alone or together with calcium and/or phosphorus increased tree biomass production by 50% and soil carbon sequestration by 65% compared to unfertilized plots. However, the nonlinear relationship observed between tree productivity and soil carbon stock across treatments suggests microbial regulation. When phosphorus was co-applied with nitrogen, it acidified the soil, increased fungal biomass, altered microbial community composition, and enhanced biopolymer degradation capabilities. While no evidence of competition between ectomycorrhizal and saprotrophic fungi has been observed, key functional groups with the potential to reduce carbon stocks were identified. In contrast, when nitrogen was added without phosphorus, it increased soil carbon sequestration because microbial activity was likely limited by phosphorus availability. In conclusion, the addition of nitrogen to boreal forests may contribute to global warming mitigation, but this effect is context dependent.
Ključne besede: carbon storage, microbial communities, boreal forest, fertilization
Objavljeno v DiRROS: 23.12.2024; Ogledov: 1013; Prenosov: 640
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2. Jellyfish-associated microbiome in the marine environment : exploring its biotechnological potentialTinkara Tinta, Tjaša Kogovšek, Katja Klun, Alenka Malej, Gerhard J. Herndl, Valentina Turk, 2019, pregledni znanstveni članek Povzetek: Despite accumulating evidence of the importance of the jellyfish-associated microbiome to jellyfish, its potential relevance to blue biotechnology has only recently been recognized. In this review, we emphasize the biotechnological potential of host–microorganism systems and focus on gelatinous zooplankton as a host for the microbiome with biotechnological potential. The basic characteristics of jellyfish-associated microbial communities, the mechanisms underlying the jellyfish-microbe relationship, and the role/function of the jellyfish-associated microbiome and its biotechnological potential are reviewed. It appears that the jellyfish-associated microbiome is discrete from the microbial community in the ambient seawater, exhibiting a certain degree of specialization with some preferences for specific jellyfish taxa and for specific jellyfish populations, life stages, and body parts. In addition, different sampling approaches and methodologies to study the phylogenetic diversity of the jellyfish-associated microbiome are described and discussed. Finally, some general conclusions are drawn from the existing literature and future research directions are highlighted on the jellyfish-associated microbiome.
Ključne besede: Cnidaria, Ctenophora, biodiversity, bioactive compounds, microbial communities, blue biotechnology
Objavljeno v DiRROS: 06.08.2024; Ogledov: 1449; Prenosov: 1256
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