1. Contribution of naturally durable wood to the circular economyKoichi Yamamoto, Tomoko Osawa, Ryu Noda, 2025, izvirni znanstveni članek Povzetek: Total wood demand is projected by the FAO to increase by 49% between 2020 and 2050, despite deteriorating supply conditions such as deforestation and degradation due to fire and biological damage to forests. Service life extension and reuse of wood can help to mitigate this projected gap between supply and demand. Common construction timber species with moderately durable heartwood include Scots pine, Douglas fir and Japanese cedar. However, this durability varies widely among clones, growing sites and within tree trunks. The selection and utilization of highly durable clones or individuals within these timber species could contribute to extending the service life of building and civil engineering structures that are at greater risk of biodegradation, such as building façades and landscape engineering applications. The authors would like to advance the discussi- on on measures to utilize this selected timber with higher durability, including maintenance strategies and the complementary use of treated timber within the circular economy.
Ključne besede: circular economy, heartwood, natural durability, service life, carbon storage, laboratory decay test, standard
Objavljeno v DiRROS: 30.12.2025; Ogledov: 820; Prenosov: 542
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2. 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: 1012; Prenosov: 640
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3. Fungal community composition predicts forest carbon storage at a continental scaleMark A. Anthony, Leho Tedersoo, Bruno De Vos, Luc Croisé, Henning Meesenburg, Markus Wagner, Henning Andreae, Frank Jacob, Paweł Lech, Anna Kowalska, Aleksander Marinšek, 2024, izvirni znanstveni članek Povzetek: Forest soils harbor hyper-diverse microbial communities which fundamentally regulate carbon and nutrient cycling across the globe. Directly testing hypotheses on how microbiome diversity is linked to forest carbon storage has been difficult, due to a lack of paired data on microbiome diversity and in situ observations of forest carbon accumulation and storage. Here, we investigated the relationship between soil microbiomes and forest carbon across 238 forest inventory plots spanning 15 European countries. We show that the composition and diversity of fungal, but not bacterial, species is tightly coupled to both forest biotic conditions and a seven-fold variation in tree growth rates and biomass carbon stocks when controlling for the effects of dominant tree type, climate, and other environmental factors. This linkage is particularly strong for symbiotic endophytic and ectomycorrhizal fungi known to directly facilitate tree growth. Since tree growth rates in this system are closely and positively correlated with belowground soil carbon stocks, we conclude that fungal composition is a strong predictor of overall forest carbon storage across the European continent.
Ključne besede: fungal community, carbon storage, forest
Objavljeno v DiRROS: 19.04.2024; Ogledov: 1178; Prenosov: 732
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