Global response patterns of plant photosynthesis to nitrogen addition: A meta‐analysis

Global Change Biology, Journal Year: 2020, Volume and Issue: 26(6), P. 3585 - 3600

Published: March 8, 2020

A mechanistic understanding of plant photosynthetic response is needed to reliably predict changes in terrestrial carbon (C) gain under conditions chronically elevated atmospheric nitrogen (N) deposition. Here, using 2,683 observations from 240 journal articles, we conducted a global meta-analysis reveal effects N addition on 14 photosynthesis-related traits and affecting moderators. We found that across 320 species, leaf was enhanced comparably mass basis (Nmass , +18.4%) area (Narea +14.3%), with no specific or per area. Total (TLA) increased significantly, as indicated by the increases total biomass (+46.5%), (+29.7%), index (LAI, +24.4%). To lesser extent than for TLA, significantly rate (Aarea +12.6%), stomatal conductance (gs +7.5%), transpiration (E, +10.5%). The responses Aarea were positively related gs instantaneous water-use efficiency only slight long-term (+2.5%) inferred 13 C composition. depended biological, experimental, environmental As experimental duration load increased, LAI diminished while E significantly. observed patterns both TLA indicate deposition will increase amount water used plants. Taken together, enhance gross plants increasing their loss atmosphere, but might diminish over time use would be amplified if persists.

Language: Английский

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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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Potential CO2 removal from enhanced weathering by ecosystem responses to powdered rock

Nature Geoscience, Journal Year: 2021, Volume and Issue: 14(8), P. 545 - 549

Published: July 26, 2021

Language: Английский

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Harnessing soil carbon sequestration to address climate change challenges in agriculture

Soil and Tillage Research, Journal Year: 2023, Volume and Issue: 237, P. 105959 - 105959

Published: Nov. 25, 2023

Language: Английский

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Statistical power and the detection of global change responses: The case of leaf production in old‐growth forests

Ecology, Journal Year: 2025, Volume and Issue: 106(1)

Published: Jan. 1, 2025

Abstract Forests sequester a substantial portion of anthropogenic carbon emissions. Many open questions concern how. We address two these questions. Has leaf and fine litter production changed? And what is the contribution old‐growth forests? with long‐term records (≥10 years) total, reproductive, especially foliar from 32 forests. expect increases in forest productivity associated rising atmospheric dioxide concentrations and, cold climates, temperatures. evaluate statistical power our analysis using simulations known temporal trends parameterized sample sizes (in number levels interannual variation observed for each record. Statistical inadequate to detect biologically plausible lasting less than 20 years. Modest characterizes production, more variable phenomena will require even longer global change responses sufficient power. Just four forests have years, provide no evidence increases. Three are central Panama, also wood both components aboveground unchanged over 21–38 The possibility that recent limited deserves attention.

Language: Английский

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Rapid responses of root traits and productivity to phosphorus and cation additions in a tropical lowland forest in Amazonia

New Phytologist, Journal Year: 2020, Volume and Issue: 230(1), P. 116 - 128

Published: Dec. 20, 2020

Soil nutrient availability can strongly affect root traits. In tropical forests, phosphorus (P) is often considered the main limiting for plants. However, support P paradigm limited, and N cations might also control forests functioning. We used a large-scale experiment to determine how factorial addition of nitrogen (N), affected productivity traits related acquisition strategies (morphological traits, phosphatase activity, arbuscular mycorrhizal colonisation contents) in primary rainforest growing on low-fertility soils Central Amazonia after 1 yr fertilisation. Multiple were affected. Phosphorus additions increased annual diameter, but decreased activity. Cation at certain times year, increasing diameter colonisation. cation their element concentrations tissues. No responses detected with addition. Here we showed that rock-derived nutrients determined functioning Amazonian soils, demonstrating not only hypothesised importance P, highlighting role cations. The changes fine indicated even slow-growing rainforests respond rapidly resource availability.

Language: Английский

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Inconsistent responses of soil microbial community structure and enzyme activity to nitrogen and phosphorus additions in two tropical forests

Plant and Soil, Journal Year: 2021, Volume and Issue: 460(1-2), P. 453 - 468

Published: Jan. 14, 2021

Language: Английский

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Ecosystem‐dependent responses of soil carbon storage to phosphorus enrichment

New Phytologist, Journal Year: 2023, Volume and Issue: 238(6), P. 2363 - 2374

Published: March 24, 2023

Phosphorus deposition can stimulate both plant carbon inputs and microbial outputs. However, how P enrichment affects soil organic (SOC) storage the underlying mechanisms remain unclear. We conducted a meta-analysis of 642 SOC observations from 213 field addition experiments world-wide explored regulations inputs, outputs, characteristics, environmental experimental factors on responses. found that, globally, stimulated by 4.0% (95% CI: 2.0-6.0%), but stimulation only occurred in forest cropland rather than grassland. Across sites, response correlated with that aboveground belowground biomass, suggesting change was more important regulating changes due to addition. Among multiple factors, N fixation status mean annual temperature were best predictors for responses addition, being higher ecosystems dominated symbiotic nitrogen fixers high-temperature regions like tropical forests. Our findings highlight differential ecosystem-dependent contribute accurate predictions dynamics P-enriched world.

Language: Английский

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Increasing calcium scarcity along Afrotropical forest succession

Nature Ecology & Evolution, Journal Year: 2022, Volume and Issue: 6(8), P. 1122 - 1131

Published: July 4, 2022

Language: Английский

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Tropical forest above‐ground productivity is maintained by nutrients cycled in litter

Journal of Ecology, Journal Year: 2024, Volume and Issue: 112(4), P. 690 - 700

Published: Jan. 8, 2024

Abstract Tropical forest productivity represents an important global carbon sink, but many tropical forests grow on infertile soils. Efficient nutrient cycling by litterfall has long been assumed to maintain tree growth, there is no direct evidence that the nutrients cycled in are essential for productivity. To test whether maintains above‐ground productivity, we established large‐scale long‐term litter removal (L−) and addition (L+) treatments a mature lowland forest. We hypothesised of would reduce survival production L− plots. By contrast, enhance L+ our hypotheses, recorded growth every 2 years, measured monthly during 17 years treatments. Tree declined over time plots, with consistently lower rates compared controls after 8 4 although was higher plots relative controls, only minor transient increase immediately start all not affected manipulation. The decline provides first empirical plays key role maintaining this can be attributed large inputs entire standing crop at term nonetheless sufficient production, possibly accelerating leaf turnover. Synthesis : makes contribution annual requirements trees, compensating Disturbances disrupt finely balanced cycle could therefore biomass sequestration forests.

Language: Английский

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