Elevated CO₂ interacts with nutrient inputs to restructure plant communities in phosphorus‐limited grasslands

Global Change Biology, Год журнала: 2024, Номер 30(1)

Опубликована: Янв. 1, 2024

Abstract Globally pervasive increases in atmospheric CO 2 and nitrogen (N) deposition could have substantial effects on plant communities, either directly or mediated by their interactions with soil nutrient limitation. While the direct consequences of N enrichment communities are well documented, potential rising globally widespread phosphorus (P) limitation remain poorly understood. We investigated simultaneous elevated (eCO ) P additions grassland biodiversity, community functional composition P‐limited grasslands. exposed soil‐turf monoliths from limestone acidic grasslands that received >25 years (3.5 14 g m −2 year −1 11 (limestone) 25 (acidic) to eCO (600 ppm) for 3 years. Across both grasslands, , significantly changed composition. Limestone were more responsive saw significant shifts resulting –nutrient interactions. Here, legume cover tripled response combined additions, treatments shifted dominance grasses sedges. suggest may disproportionately benefit acquisition sedges subsidising carbon cost locally intense root exudation at expense co‐occurring grasses. In contrast, was insensitive its additions. Greater diversity P‐acquisition strategies grassland, a functionally even diverse community, contribute stronger responses compared grassland. Our work suggests we see large changes biodiversity loading, particularly where these contain high developmentally young soils sufficient bioavailable mineral P.

Язык: Английский

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Contrasting depth‐related fine root plastic responses to soil warming in a subtropical Chinese fir plantation

Journal of Ecology, Год журнала: 2024, Номер 112(5), С. 1058 - 1073

Опубликована: Март 6, 2024

Abstract Warming‐induced soil drought, especially in topsoil, may enlarge the spatial mismatch between nutrients and water along profile, which impedes uptake of not only but also by trees. Therefore, coordinating acquisition profile is an important strategy for trees to cope with global warming. This study examined depth‐related changes nutrient concentrations, biomass morphology fine roots a Chinese fir plantation after 3 years large‐scale manipulative Soil warming (ambient +4°C) increased root nitrogen (N) concentrations decreased phosphorus (P) across depths. Warming did affect total its vertical distribution. At 0–10 cm depth, specific length (SRL), area (SRA), diameter (RD) density (RLD) reduced tissue (RTD). In 40–60 layer, RD, SRL RLD while increasing RTD mainly 1–2 mm class. Synthesis . We concluded that plantations could adapt warming‐induced moderate stress through contrasting morphological adjustments, probably optimize both nutrients. The results this are crucial understanding adaptation strategies subtropical forests under future climate conditions.

Язык: Английский

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Bacterial Community Structure Modulates Soil Phosphorus Turnover at Early Stages of Primary Succession

Global Biogeochemical Cycles, Год журнала: 2024, Номер 38(10)

Опубликована: Окт. 1, 2024

Abstract Microbes are the drivers of soil phosphorus (P) cycling in terrestrial ecosystems; however, role microbes mediating P P‐rich soils during primary succession remains uncertain. This study examined impacts bacterial community structure (diversity and composition) its functional potential (absolute abundances P‐cycling genes) on along a 130‐year glacial chronosequence eastern Tibetan Plateau. Bacterial was better predictor fractions than genes chronosequence. After glacier retreat, solubilization inorganic mineralization organic were significantly enhanced by increased diversity, changed interspecific interactions, abundant species involved mineralization, thereby increasing availability. Although 84% associated with these more closely carbon P. demand probably determined turnover, indicating dominant matter decomposition processes alpine soils. Moreover, significant decrease complexity co‐occurrence network taxa‐gene‐P at later stage indicates declining dominance driving succession. Our results reveal that bacteria complex have prominent for biogeochemical early stages

Язык: Английский

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Decoupling of uptake‐ and transport‐related traits in absorptive roots across coexisting herbaceous species in alpine meadows

Journal of Ecology, Год журнала: 2024, Номер 112(4), С. 770 - 783

Опубликована: Янв. 29, 2024

Abstract The anatomical structure of roots determines their function. Coexisting species complementarily forage nutrients by themselves (e.g. root strategy) and fungal partners mycorrhizal strategy), leading to a trade‐off between strategy strategy. However, few studies have specifically evaluated whether how the structures are involved in this trade‐off, especially for alpine ecosystems limited extreme climate. Here, absorptive chemical traits three key commonly associated with nutrient foraging strategies, that is indicated first‐order length branching intensity arbuscular colonization, were examined across 68 herbaceous meadows Tibetan Plateau. We observed higher had more protoxylem poles, thinner cortices smaller cortical cells, whereas colonization longer consistently thicker larger cells. Unexpectedly, responsible uptake decoupled from stelar specialized water transportation. decoupling may be related non‐coordinated changes soil availability In addition, we found thickness radius increased at similar rate rather than well‐reported different rates increasing diameter. Synthesis : Our results demonstrate internal makeup plays an integral role forming diverse strategies below‐ground. These findings provide new insights into our understanding plant coexistence responses climate change on

Язык: Английский

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Arbuscular mycorrhizal fungi promote functional gene regulation of phosphorus cycling in rhizosphere microorganisms of Iris tectorum under Cr stress

Journal of Environmental Sciences, Год журнала: 2024, Номер 151, С. 187 - 199

Опубликована: Март 17, 2024

Язык: Английский

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Trees adjust nutrient acquisition strategies across tropical forest secondary succession

New Phytologist, Год журнала: 2024, Номер 243(1), С. 132 - 144

Опубликована: Май 14, 2024

Nutrient limitation may constrain the ability of recovering and mature tropical forests to serve as a carbon sink. However, it is unclear what extent trees can utilize nutrient acquisition strategies - especially root phosphatase enzymes mycorrhizal symbioses overcome low availability across secondary succession. Using large-scale, full factorial nitrogen phosphorus fertilization experiment 76 plots along successional gradient in lowland wet Panama, we tested which enzyme activity colonization are flexible, if investment shifts over succession, reflective changing limitation. We also conducted meta-analysis test how adjust these response additions find that dynamic, adjusting particularly conditions through These changes reflect shift from strong weak Our findings were consistent with our field study; found more predictable responses than availability. suggest respond demand forests, likely critical for alleviating

Язык: Английский

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Phosphorus scarcity contributes to nitrogen limitation in lowland tropical rainforests

Ecology, Год журнала: 2023, Номер 104(6)

Опубликована: Апрель 11, 2023

Abstract There is increasing evidence to suggest that soil nutrient availability can limit the carbon sink capacity of forests, a particularly relevant issue considering today's changing climate. This question especially important in tropics, where most part Earth's plant biomass stored. To assess whether tropical forest growth limited by nutrients and explore N P limitations, we analyzed stem foliar elemental composition five widest trees per plot at two sites French Guiana after 3 years nitrogen (N), phosphorus (P), + addition. We also compared results between potential N‐fixer non‐N‐fixer species. found positive effect fertilization on N, as well growth, P. Potential N‐fixing species had greater concentrations than non‐N‐fixers. In terms there was negative interaction status, P, fertilization, but no with fertilization. Because plants do not show be completely saturated, anticipate providing from would supply Although soil‐age hypothesis only anticipates limitation highly weathered systems, our for indicate existence considerable co‐limitation, which alleviated plants. The suggests certain mechanisms invest obtain scarce through phosphatases, potentially contributes detected this study.

Язык: Английский

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Effects of plant‐available soil silicon on seedling growth and foliar nutrient status across tropical tree species

Oikos, Год журнала: 2023, Номер 2023(8)

Опубликована: Май 5, 2023

Plant‐available silicon (Si) concentrations vary considerably across tropical soils, yet the ecological importance of that variation remains largely unresolved. Increased Si availability can enhance growth and modulate foliar nutrient status in many crop species suggesting similar effects might occur natural systems. However, how growth, macronutrient as well their stoichiometry respond to plant‐available these responses differ tree is unknown. We experimentally exposed seedlings 12 a gradient concentrations, representing 85 % found central Panama, assessed aboveground status. Furthermore, we whether higher increases P availability. Increasing led increased (by up 140%). It also 220%), it affected C N species. at species‐level only small subset two four showed significant responses. At soil‐level, remained unchanged along experimental soil gradient. Our results improve and/or number species' differently forest sites varying Si. Additionally, Si‐induced have potential affect herbivory litter decomposition. Taken together, influence plant performance unequally species, change trophic interactions, with implications for ecosystem processes.

Язык: Английский

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Plant–microbe interactions ameliorate phosphate-mediated responses in the rhizosphere: a review

Frontiers in Plant Science, Год журнала: 2023, Номер 14

Опубликована: Июнь 9, 2023

Phosphorus (P) is one of the essential minerals for many biochemical and physiological responses in all biota, especially plants. P deficiency negatively affects plant performance such as root growth metabolism yield. Mutualistic interactions with rhizosphere microbiome can assist plants accessing available soil its uptake. Here, we provide a comprehensive overview plant–microbe that facilitate uptake by plant. We focus on role biodiversity improved plant, under drought conditions. P-dependent are regulated phosphate starvation response (PSR). PSR not only modulates to abiotic stresses but also activates valuable microbes which accessible P. The drought-tolerant P-solubilizing bacteria appropriate mobilization, would be an eco-friendly manner promote tolerance, extreme environments. This review summarizes improve brings important insights into ways cycling arid semi-arid ecosystems.

Язык: Английский

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Reference maps of soil phosphorus for the pan-Amazon region

Earth system science data, Год журнала: 2024, Номер 16(1), С. 715 - 729

Опубликована: Янв. 31, 2024

Abstract. Phosphorus (P) is recognized as an important driver of terrestrial primary productivity across biomes. Several recent developments in process-based vegetation models aim at the concomitant representation carbon (C), nitrogen (N), and P cycles ecosystems, building upon ecological stoichiometry processes that govern nutrient availability soils. Thus, understanding spatial distribution forms soil fundamental to initializing and/or evaluating include biogeochemical cycle P. One major constraints for large-scale application these lack data related patterns various present soils, given sparse nature situ observations. We applied a model selection approach based on random forest regression trained tested prediction different (total, available, organic, inorganic, occluded P) – obtained by Hedley sequential extraction method. As input models, reference group textural properties, geolocation, N C contents, terrain elevation slope, pH, mean annual precipitation temperature from 108 sites RAINFOR network were used. The selected then predict target using several spatially explicit datasets containing contiguous estimated values area interest. Here, we set maps depicting total, topsoil profile (0–30 cm) pan-Amazon region resolution 5 arcmin. presented good level accuracy (77.37 %, 76,86 75.14 68.23 64.62% respectively). Our results confirm mapped generally has very low total concentration status, with clear gradient development content. Total was most variable all analysis partial dependence indicates features are also forms. observed gaps used train test especially elevated areas, constitute problem methods here. However, could be accuracy. Also, biases gridded introduced maps. Nonetheless, final map resembles expected geographical patterns. may useful parametrization evaluation ecosystem well other types models. they can promote testing new hypotheses about status soil-vegetation feedback region. downloaded https://doi.org/10.25824/redu/FROESE (Darela-Filho Lapola, 2023).

Язык: Английский

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