Remarkable effects of microbial factors on soil phosphorus bioavailability: A country‐scale study

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(14), P. 4459 - 4471

Published: April 22, 2022

Low soil phosphorus (P) bioavailability causes the widespread occurrence of P-limited terrestrial ecosystems around globe. Exploring factors influencing P at large spatial scales is critical for managing these ecosystems. However, previous studies have mostly focused on abiotic factors. In this study, we explored effects microbial using a country-scale sampling effort. Our results showed that biomass carbon (MBC) and acid phosphatase were important predictors agro- natural across China although they appeared less than total P. The two had positive effect both ecosystem types able to mediate several (e.g., mean annual temperature). Meanwhile, revealed phytase could affect country scale via ways similar those MBC phosphatase, pattern being more pronounced in agroecosystems Moreover, obtained evidence genes encoding enzymes their sizes varied between types. Taken together, study demonstrated remarkable scale, highlighting importance consider

Language: Английский

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Reading tea leaves worldwide: Decoupled drivers of initial litter decomposition mass‐loss rate and stabilization

Ecology Letters, Journal Year: 2024, Volume and Issue: 27(5)

Published: May 1, 2024

Abstract The breakdown of plant material fuels soil functioning and biodiversity. Currently, process understanding global decomposition patterns the drivers such are hampered by lack coherent large‐scale datasets. We buried 36,000 individual litterbags (tea bags) worldwide found an overall negative correlation between initial mass‐loss rates stabilization factors plant‐derived carbon, using Tea Bag Index (TBI). factor quantifies degree to which easy‐to‐degrade components accumulate during early‐stage (e.g. environmental limitations). However, agriculture interaction moisture temperature led a decoupling stabilization, notably in colder locations. Using TBI improved estimates natural litter compared models that ignored stabilization. Ignoring transformation dead more recalcitrant substances decomposition, control this transformation, could overestimate carbon losses early cycle models.

Language: Английский

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Unraveling the Edaphic Factors Driving Organic Material Decay: Insights from Long-Term Manure Application Studies

Soil Biology and Biochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 109711 - 109711

Published: Jan. 1, 2025

Language: Английский

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Tea Bag Index Revisited: Risks of Misleading Decomposition Patterns

Ecology Letters, Journal Year: 2025, Volume and Issue: 28(4)

Published: April 1, 2025

ABSTRACT This study shows that recent global analyses using the Tea Bag Index (TBI) are influenced by methodological flaws: (1) interdependence of stabilisation factor ( S ) and decomposition constant k biases correlation analysis, (2) derivation from separate curves causes their decoupling, most importantly, (3) determination is inaccurate.

Language: Английский

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Home‐field advantage of litter decomposition differs between leaves and fine roots

New Phytologist, Journal Year: 2020, Volume and Issue: 227(4), P. 995 - 1000

Published: March 5, 2020

Litter decomposition is a fundamental process influencing carbon dynamics and nutrient cycling in terrestrial ecosystems. In the 20th century, it was commonly accepted that climate, litter quality soil biota hierarchically influenced from large to local scale (Swift et al., 1979; Coûteaux 1995). However, recent studies have suggested decomposer communities are much more important driving than previously thought, mainly because aggregate data at spatial scales falsely assumed represent causative relationships small (Bradford 2014, 2017). particular, microbial functioning may depend on complex interactions between decomposers their substrates such as plant (Jackrel 2019; Lin 2019). The home-field advantage (HFA) hypothesis predicts efficient with litters they most frequently encounter (Gholz 2000; Ayres 2009b; Austin 2014; Palozzi & Lindo, 2018). This has been empirically tested various ecosystems via reciprocal transplant experiments (Ayres 2009a; Milcu Manning, 2011; Fanin 2016; Lu 2017; Veen 2018; Jackrel 2019), HFA shown increase rates by 7.5% average (Veen 2015a). vast majority of demonstrating effects used leaf litter, whether results consistent root seldom tested. Fine roots account for substantial amount inputs ecosystems, play major role through afterlife 'effects' (Jackson 1997, Freschet 2013). Because arise due specialization towards substrates, especially when substrate recalcitrant (Milcu 2011), should generate necessity synthesize specific oxidative enzymes breakdown organic compounds. Yet, very limited empirical evaluating using reported positive, neutral or negative (Freschet 2012a; Jacobs Minerovic 2018), perhaps consequence an variability chemistry 'home' 'away' sites Hence, difficult generalize decomposition. Furthermore, coherent different organs originating same species (e.g. leaves roots), never evaluated experiment. differ substantially chemical compositions 2012b; Ma Sun qualities stimulate contrasting characterized varying metabolic requirements catabolic capacities (Sauvadet Therefore, we hypothesize concordance aboveground belowground parts depends (dis)similarity roots, is, having greater similarity traits present relatively similar (hypothesis 1). recalcitrance thought be one main drivers controlling higher degree display often 2). We performed 1132-d experiment among three forest collected dominant tree each site: broadleaf (Castanopsis eyrei), coniferous (Cunninghamia lanceolata) bamboo (Phyllostachys heterocycla cv Pubescens) (see Supporting Information Methods S1 details study sites). Freshly fallen were traps prevent infection site. Roots extracted washed sieve under running water. Fresh fine (Ф < 2 mm) picked out sterilized chloroform vapour. 14 related element concentration, stoichiometry (Table S1; about trait measurements S1). site, six randomized blocks, distance least 10 m block, selected litterbag incubation. Each (15 cm × mesh size 25-μm, which allows enter litterbags), filled c. 3.0 g litters, labelled plastic tag. Although fauna also significantly affect magnitude some previous our showed did not contribute (Lin total, placed litterbags per type block successive harvests during first year (94 222 d), second (392 583 d) third (827 1132 after start incubation, resulting total 648 this (three blocks types harvest times). Leaf anchored floor buried soil. Following harvest, samples cleaned tap water, oven-dried 60°C 48 h weighed. mass loss (%) calculated (Mi − Mf)/Mi 100, where Mi Mf initial final dry mass, respectively. ran nonmetric multidimensional scaling (NMDS) visualize variation types, then permutational multivariate analysis variance (PERMANOVA) test significant species, organ interaction traits. dissimilarity Euclidean distance. incubation time respectively, analysed linear mixed models first-order auto-regressive structure temporal pseudo-replication. To improve reliability statistical inference, parsimonious based lowest AICc (Akaike's information criterion corrected sample sizes). addition, index estimated regression model proposed Keiser al. (2014) detailed description analyses). NMDS ordination separated well along two axes (Fig. 1), associated known directly nutrients (i.e. nitrogen (N), phosphorus (P), potassium (K), manganese (Mn)), forms phenols, lignin, tannins) stoichiometric ratios (N : P, C lignin N) Melillo 1982; Keiluweit 2015; Chomel differed (P 0.001; Table S2). S2), Specifically, labile S1), both generally located high end By contrast, comparison low line expectations, exhibited lower loss, respectively Coniferous intermediate litters. Overall, concentrations phenols tannins explain compared over course found site effect (F4,40 = 13.23, P suggesting environment decomposes result its there no 0.78, 0.546; Accordingly, inconsistent d although varied order > S3), highest difference throughout decomposition, but only case displayed 222-d S3). these contradict predicting effects, suggest microbes considered. Interestingly, rarely Contrary hypothesis, findings highlight 2015b; results, microcosm field exhibit (Jacobs One potential explanation could differences microhabitats profile. covered freshly rich compounds, whereas within soil, matter heavily decomposed (Adl, 2003). These resource conditions composition activity litter–soil continuum (Sterkenburg environments wider functional capacity those richer environments, meaning efficiently decompose vary widely characteristics (functional breadth hypothesis; 2011, 2016), thereby decreasing toward encounter. Alternatively, close adult trees targeted likely heterogeneous includes many other coexisting species. adaptation specialist individual might less resources highly diverse mixed. cannot exclude microclimatic profile, notably water content reduce (Fanin 2019a). Additional simultaneously manipulating will necessary disentangle effects. long-term experiment, sought patterns roots. organs, either across underlining need considered separately substrates. several implications. First, emphasize pronounced roots) leaves) 2017), demonstrate occur compounds Second, decoupling subsystems (Cameron Delgado-Baquerizo 2019b), finding begs question position perform understand adaption sustrates. Finally, thousand days indicating succession factor predict plant–soil time. conclude plant–microbe cycling, strongly environmental scale. research funded National Natural Science Foundation China (31500356). authors thank Mei Pan, Fang Wang, Yan Liu, Pei Wang laboratory assistance. Tania Maxwell her help English useful remarks. Three anonymous reviewers provided helpful suggestions manuscript. DL designed research. DL, PD, GY HW input SQ, LZ, YY, XM KM. carried all analyses NF. NF wrote draft All contributed manuscript completion revision. Descriptions analyses. Initial study. S2 PERMANOVA statistics S3 Dissimilarity types. S4 Results selection procedure Please note: Wiley Blackwell responsible functionality any supplied authors. Any queries (other missing material) directed New Phytologist Central Office. publisher supporting content) corresponding author article.

Language: Английский

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Effect of a tree mixture and water availability on soil nutrients and extracellular enzyme activities along the soil profile in an experimental forest

Soil Biology and Biochemistry, Journal Year: 2020, Volume and Issue: 148, P. 107864 - 107864

Published: May 22, 2020

Language: Английский

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Water table depth, experimental warming, and reduced precipitation impact on litter decomposition in a temperate Sphagnum-peatland

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 771, P. 145452 - 145452

Published: Jan. 28, 2021

The Tea Bag Index (TBI) method was used to estimate the litter decomposition rate in peatland exposed for climate manipulation (increased temperature and reduced precipitation) at two contrasting sites differing water table depth (WTD) dynamics. To manipulate on peatland, prototyped Open Top Chambers (OTC) automated rain-out shelters were used. OTCs increased daytime air temperatures by ~1.7 °C driest plots an increase of precipitation, while average daily lower than 0.9 °C. However, cooled down peat even 0.8 this effect most pronounced rather night-time conditions. precipitation amount 26%. tea bags buried 8 cm 83 172 days starting from 19th April 2019. Our observation proved that although rates dependent temperature, WTD its fluctuations are main factors controlling waterlogged ecosystems like ours. At Sphagnum-dominated peatlands, interrelation between different environmental may mitigate impact warming decomposition.

Language: Английский

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Risk of misinterpreting the Tea Bag Index: Field observations and a random simulation

Ecological Research, Journal Year: 2022, Volume and Issue: 37(3), P. 381 - 389

Published: March 10, 2022

Language: Английский

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Decomposition rate and stabilization across six tundra vegetation types exposed to >20 years of warming

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 724, P. 138304 - 138304

Published: March 30, 2020

Litter decomposition is an important driver of soil carbon and nutrient cycling in nutrient-limited Arctic ecosystems. However, climate change expected to induce changes that directly or indirectly affect decomposition. We examined the direct effects long-term warming relative differences abiotic properties associated with vegetation type on litter across six subarctic types.In types, rooibos green tea bags were buried for 70-75 days at 8 cm depth inside warmed (by open-top chambers) control plots had been place 20-25 years. Standardized initial rate stabilization labile material fraction (into less decomposable material) calculated from mass losses. Soil moisture temperature measured bi-weekly during summer plant-available nutrients resin probes.Initial was decreased by treatment. Stabilization affected determined moisture. metal concentrations impeded both stabilization.While a warmer will likely have rates tundra, organic matter more parameters prone be warming.

Language: Английский

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Effects of Climate and Atmospheric Nitrogen Deposition on Early to Mid-Term Stage Litter Decomposition Across Biomes

Frontiers in Forests and Global Change, Journal Year: 2021, Volume and Issue: 4

Published: July 14, 2021

Litter decomposition is a key process for carbon and nutrient cycling in terrestrial ecosystems mainly controlled by environmental conditions, substrate quantity quality as well microbial community abundance composition. In particular, the effects of climate atmospheric nitrogen (N) deposition on litter its temporal dynamics are significant importance, since their might change over course process. Within TeaComposition initiative, we incubated Green Rooibos teas at 524 sites across nine biomes. We assessed how macroclimate inorganic N under current predicted scenarios (RCP 2.6, RCP 8.5) affect mass loss measured after 3 12 months. Our study shows that early to mid-term global scale was affected predominantly (explaining 73% 62% total variance months, respectively) followed deposition. The were not litter-specific became increasingly progressed, with MAP explaining 2% MAT 4% variation months incubation. effect litter-specific, only 12-month tea scale. However, temperate biome where rates relatively high, decreased significantly increasing deposition, 9.5% 1.1% variance, respectively. expected changes end this century estimated increase easily decomposable 1.1–3.5% more stable substrates 3.8–10.6%, relative loss. contrast, will decrease high-quality 1.4–2.2% low-quality 0.9–1.5% biome. results suggest projected increases may have capacity dampen climate-driven depending stage substrate.

Language: Английский

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