Direct evidence for phosphorus limitation on Amazon forest productivity

Nature, Journal Year: 2022, Volume and Issue: 608(7923), P. 558 - 562

Published: Aug. 10, 2022

Language: Английский

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Plant phosphorus‐use and ‐acquisition strategies in Amazonia

New Phytologist, Journal Year: 2022, Volume and Issue: 234(4), P. 1126 - 1143

Published: Jan. 21, 2022

In the tropical rainforest of Amazonia, phosphorus (P) is one main nutrients controlling forest dynamics, but its effects on future biomass carbon (C) storage under elevated atmospheric CO2 concentrations remain uncertain. Soils in vast areas Amazonia are P-impoverished, and little known about variation or plasticity plant P-use -acquisition strategies across space time, hampering accuracy projections vegetation models. Here, we synthesize current knowledge leaf P resorption, fine-root foraging, arbuscular mycorrhizal symbioses, root acid phosphatase organic exudation discuss how these vary with soil response to . We identify gaps suggest ways forward fill those gaps. Additionally, propose a conceptual framework for variations along gradients Amazonia. that soils intermediate high concentrations, at community level, investments primarily directed foraging via roots mycorrhizas, whereas low shift prioritize resorption mining phosphatases acids.

Language: Английский

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Different effects of litter and root inputs on soil enzyme activities in terrestrial ecosystems

Applied Soil Ecology, Journal Year: 2022, Volume and Issue: 183, P. 104764 - 104764

Published: Nov. 30, 2022

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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Litter inputs and phosphatase activity affect the temporal variability of organic phosphorus in a tropical forest soil in the Central Amazon

Plant and Soil, Journal Year: 2021, Volume and Issue: 469(1-2), P. 423 - 441

Published: Oct. 18, 2021

Abstract Purpose The tropical phosphorus cycle and its relation to soil (P) availability are a major uncertainty in projections of forest productivity. In highly weathered soils with low P concentrations, plant microbial communities depend on abiotic biotic processes acquire P. We explored the seasonality relative importance drivers controlling fluctuation common pools via such as litter production decomposition, phosphatase activity. Methods analyzed intra-annual variation using modified Hedley sequential fractionation scheme. addition, we measured litterfall, mobilization from extracellular enzyme activity tested their fluctuations P- fractions. Results Our results showed clear patterns seasonal variability fractions during year. found that modeled released decomposition was positively related change organic fractions, while net negatively activities top 5 cm. Conclusion conclude input by potential two main factors fluctuations, therefore economy impoverished soils. Organic followed pattern, indicating tight cycling nutrient, reinforcing studying an integrated dynamic system context.

Language: Английский

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Long-term conservation tillage results in a more balanced soil microbiological activity and higher nutrient supply capacity

International Soil and Water Conservation Research, Journal Year: 2023, Volume and Issue: 11(3), P. 528 - 537

Published: March 22, 2023

Soil health depletion due to intensive tillage operations is a global issue in the agricultural sector. Conservation (CT) which involves non-inversion and leaving ∼30% of soil surface covered with crop residues, strategy designed enhance health. However, no comprehensive study investigate long-term effect CT on biological activity nutrient supply has yet been widely carried out. Biological chemical properties were assessed at depths 0–5, 10–15, 20–25 cm after 18 years conventional practice (PT). Various stages vegetative growth maize investigated 2021 Hungary. The findings indicated that intensity, depth, all significantly influenced enzyme activities concentration nutrients. Less disturbance resulted larger carbon parameters (total organic labile carbon) plots, where β-glucosidase dehydrogenase (DHA) upper layer increased (0.7–2.6 2.6–4.7 times, respectively) compared PT. high amount matter greater resistance erosion observed also contributed higher available nutrients (NH4, NO3, Ca, K) total P layer. Phosphatase was highest mid-stage positively correlated concentration. alterations water content clearly negatively change DHA phosphatase activity. Overall, more balanced environmental conditions, decomposition substances slower than This implied mobilization as well, released gradually. enhancement nutrient-supplying capacity achieved by means conservation provides promising for sustainable management.

Language: Английский

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Leaf litter decomposition rates: influence of successional age, topography and microenvironment on six dominant tree species in a tropical dry forest

Frontiers in Forests and Global Change, Journal Year: 2023, Volume and Issue: 6

Published: May 12, 2023

Litter decomposition is a central process in forest ecosystems because of its role carbon and nutrient cycling maintaining soil fertility. Decomposition affected by plant traits, microenvironmental conditions, topography, vegetation structure, which varies with successional age. However, it unclear how all these factors affect leaf dominant tree species tropical dry forests (TDFs). The objective this study was to compare the rates six species: three legumes ( Caesalpinia gaumeri , Lysiloma latisiliquum Piscidia piscipula ) non-legumes Bursera simaruba Gymnopodium floribundum Neomillspaughia emarginata five age categories (8–10, 15–22, 23–30, 65–84, > 85 years-old) two topographic conditions (flat sloping sites) TDF, analyze association traits (toughness, N, C total phenols content) properties (bulk density, organic carbon, pH, clay), (litter moisture, area index), variables (basal area, aboveground biomass, diameter, height). Litterbags were placed 30–400 m 2 circular plots distributed Yucatan, Mexico, collected on occasions spread over 230 days (540 samples per species). L. C. had highest (as well as nitrogen concentration lowest toughness). Conversely, G. decay rate. rate reached high values at intermediate ages, suggesting that fertility recovers rapidly after disturbance, although only showed significant differences among stand categories. consistently higher flat sites than slopes but difference for . soil, structure contributed most explaining variation varied species. tended increase moisture clay content, decrease pH susceptibility climate change erosion, particularly areas. Our results highlight importance analyzing species-specific responses, especially species, likely contribute litter decomposition, consider key ecological influence process.

Language: Английский

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Seasonal fluctuations of extracellular enzyme activities are related to the biogeochemical cycling of C, N and P in a tropical terra-firme forest

Biogeochemistry, Journal Year: 2023, Volume and Issue: 163(1), P. 1 - 15

Published: Jan. 21, 2023

Abstract Extracellular enzymes (EE) play a vital role in soil nutrient cycling and thus affect terrestrial ecosystem functioning. Yet the drivers that regulate microbial activity, therefore EE remain under debate. In this study we investigate temporal variation of tropical terra-firme forest. We found activity peaked during drier season association with increased leaf litterfall, which was also reflected negative relationships between activities precipitation. Soil nutrients were weakly related to activities, although extractable N top 5 cm soil. These results suggest is synchronized precipitation-driven substrate inputs depends on availability N. Our further indicate high investments P acquisition, higher demand month before onset season, shifting towards end season. seasonal fluctuations potential acquisition essential resources imply dynamic shifts coordination climate seasonality resource limitation central-eastern Amazon forests.

Language: Английский

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Soil carbon pool dynamics, microbial community diversity and pineapple (Ananas comosus) productivity response to partial organic substitution strategies: A four-year study

Scientia Horticulturae, Journal Year: 2025, Volume and Issue: 343, P. 114096 - 114096

Published: March 1, 2025

Language: Английский

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Representation of the phosphorus cycle in the Joint UK Land Environment Simulator (vn5.5_JULES-CNP)

Geoscientific model development, Journal Year: 2022, Volume and Issue: 15(13), P. 5241 - 5269

Published: July 7, 2022

Abstract. Most land surface models (LSMs), i.e. the components of Earth system (ESMs), include representation nitrogen (N) limitation on ecosystem productivity. However, only a few these have incorporated phosphorus (P) cycling. In tropical ecosystems, this is likely to be important as N tends abundant, whereas availability rock-derived elements, such P, can very low. Thus, without P cycling, forest response in areas Amazonia rising atmospheric CO2 conditions remain highly uncertain. study, we introduced dynamics and its interactions with carbon (C) cycles into Joint UK Land Environment Simulator (JULES). The new model (JULES-CNP) includes stocks vegetation soil pools, well key processes controlling fluxes between pools. We develop evaluate JULES-CNP using situ data collected at low-fertility site central Amazon, content representative 60 % soils across Amazon basin, parameterize, calibrate, JULES-CNP. Novel plant pool observations are used for parameterization calibration, evaluated against C those pools not or calibration. then additional P-limited test sites Panama Hawaii, showing significant improvement over C- CN-only versions model. applied under elevated (600 ppm) our study quantify impact fertilization. compare results current state-of-the-art CNP same methodology that was AmazonFACE intercomparison study. able reproduce observed evaluation ambient CO2. estimate limit net primary productivity (NPP) by 24 46 Under CO2, biomass simulations accounting increase 10 relative contemporary conditions, although it 5 lower compared CN- C-only simulations. Our highlight potential high therefore fertilization capacity rainforest soils.

Language: Английский

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