Leaf-level coordination principles propagate to the ecosystem scale

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Июль 4, 2023

Abstract Fundamental axes of variation in plant traits result from trade-offs between costs and benefits resource-use strategies at the leaf scale. However, it is unclear whether similar propagate to ecosystem level. Here, we test trait correlation patterns predicted by three well-known leaf- plant-level coordination theories – economics spectrum, global spectrum form function, least-cost hypothesis are also observed community mean processes. We combined functional properties FLUXNET sites, vegetation properties, into corresponding principal component analyses. find that (90 sites), function (89 (82 sites) all evidence additional scale-emergent properties. Evaluating may aid development more realistic dynamic models with critical empirical data, reducing uncertainty climate change projections.

Язык: Английский

---

A Vegetation and Soil Survey Method for Surveillance Monitoring of Rangeland Environments

Frontiers in Ecology and Evolution, Год журнала: 2020, Номер 8

Опубликована: Июнь 16, 2020

Ecosystem surveillance monitoring is critical to managing natural resources and especially so under changing environments. Despite this importance, the design implementation of programs across large temporal spatial scales has been hampered by lack appropriately standardised methods data streams. To address gap, we outline a method based on permanent plots voucher samples suited rangeland environments around world that repeatable, cost-effective, appropriate for large-scale comparisons adaptable other global biomes. The provides comprehensive vegetation composition structure along with soil attributes relevant plant growth, delivered as combination modules can be targeted different purposes or available resources. Plots are located in stratified units, landforms climates enhance continental comparisons. Changes investigated through revisits. Vegetation measured inform composition, cover structure. Samples soils collected tracked barcode labels stored long-term subsequent analysis. Technology used accuracy field methods, including differential GPS r plot locations, instrument Leaf Area Index (LAI) measures, three dimensional photo-panoramas advanced A key feature use electronic collection delivery into publicly-accessible database. Our pragmatic, whilst still providing consistent data, information attributes. operational applied at more than 704 locations Australian rangelands part Surveillance program Terrestrial Research Network (TERN). methodology enables analyses, tested communities broadly representative globally, components being applicable Here also recommend consultative process guiding principles drove development an approach consistent, objective continental, potentially analyses were not previously possible disparate datasets.

Язык: Английский

---

Leaf trait variation in species-rich tropical Andean forests

Scientific Reports, Год журнала: 2021, Номер 11(1)

Опубликована: Май 11, 2021

Abstract Screening species-rich communities for the variation in functional traits along environmental gradients may help understanding abiotic drivers of plant performance a mechanistic way. We investigated tree leaf trait an elevation gradient (1000–3000 m) highly diverse neotropical montane forests to test hypothesis that elevational change reflects trend toward more conservative resource use strategies at higher elevations, with interspecific decreasing and integration increasing due filtering. Analysis variance partitioning across 52 species revealed most dominant influence phylogeny, except SLA, thickness foliar Ca, where was influential. The community-level means N N/P ratio decreased elevation, while toughness increased. contribution intraspecific substantial community level traits, yet smaller than component. Both within-species between-species did not systematically elevation. High phylogenetic diversity, together small-scale edaphic heterogeneity, cause large these hyper-diverse Andean forests. Trait network analysis suggesting stronger filtering colder nutrient-poorer sites.

Язык: Английский

---

Coordination of plant hydraulic and photosynthetic traits: confronting optimality theory with field measurements

New Phytologist, Год журнала: 2021, Номер 232(3), С. 1286 - 1296

Опубликована: Июль 29, 2021

Close coupling between water loss and carbon dioxide uptake requires coordination of plant hydraulics photosynthesis. However, there is still limited information on the quantitative relationships hydraulic photosynthetic traits. We propose a basis for these based optimality theory, test its predictions by analysis measurements 107 species from 11 sites, distributed along nearly 3000-m elevation gradient. Hydraulic leaf economic traits were less plastic, more closely associated with phylogeny, than The two sets linked sapwood to area ratio (Huber value, v

Язык: Английский

---

Ecosystem Photosynthesis in Land‐Surface Models: A First‐Principles Approach Incorporating Acclimation

Journal of Advances in Modeling Earth Systems, Год журнала: 2021, Номер 14(1)

Опубликована: Дек. 6, 2021

Abstract Vegetation regulates land‐atmosphere, water, and energy exchanges is an essential component of land‐surface models (LSMs). However, LSMs have been handicapped by assumptions that equate acclimated photosynthetic responses to the environment with fast observable in laboratory. The effects acclimation can be taken into account including PFT‐specific values parameters, but at cost increasing parameter requirements. Here, we develop alternative approach for adopting P model, existing light‐use efficiency model gross primary production (GPP) implicitly predicts parameters on a weekly monthly timescale via optimality principles. We demonstrate it possible explicitly separate slow environmental conditions, allowing simulation GPP sub‐daily timesteps required coupling LSM. resulting reproduces diurnal cycles recorded eddy‐covariance flux towers temperate grassland boreal, tropical forests. best performance achieved when biochemical capacities are adjusted match recent midday conditions. Comparison between this operational LSM European Centre Medium‐range Weather Forecasts climate shows new has better predictive power most sites years analyzed, particularly summer autumn. Our analyses suggest simple parameter‐sparse method include both instantaneous within framework, potential applications weather, climate, carbon‐cycle modeling.

Язык: Английский

---

Leaf spectroscopy reveals divergent inter‐ and intra‐species foliar trait covariation and trait–environment relationships across NEON domains

New Phytologist, Год журнала: 2022, Номер 235(3), С. 923 - 938

Опубликована: Май 5, 2022

Concurrent measurement of multiple foliar traits to assess the full range trade-offs among and within taxa across broad environmental gradients is limited. Leaf spectroscopy can quantify a wide functional traits, enabling assessment interrelationships with environment. We analyzed leaf trait measurements from 32 sites along eco-climatic gradient encompassed by US National Ecological Observatory Network (NEON). explored relationships 14 1103 individuals species, factors. Across all species pooled, between economic (leaf mass per area, nitrogen) indicative defense stress tolerance (phenolics, nonstructural carbohydrates) were weak, but became strong certain species. Elevation, mean annual temperature precipitation weakly predicted variation although some exhibited species-specific significant Foliar vary idiosyncratically express diverse combinations achieve fitness. offers an effective approach intra-species covariation, potentially could be used improve characterization vegetation in Earth system models.

Язык: Английский

---

Characterizing seasonal variation in foliar biochemistry with airborne imaging spectroscopy

Remote Sensing of Environment, Год журнала: 2022, Номер 275, С. 113023 - 113023

Опубликована: Апрель 6, 2022

Язык: Английский

---

Leaf nitrogen from the perspective of optimal plant function

Journal of Ecology, Год журнала: 2022, Номер 110(11), С. 2585 - 2602

Опубликована: Июль 18, 2022

Leaf dry mass per unit area (LMA), carboxylation capacity (

Язык: Английский

---

Soil nitrogen fertilization reduces relative leaf nitrogen allocation to photosynthesis

Journal of Experimental Botany, Год журнала: 2023, Номер 74(17), С. 5166 - 5180

Опубликована: Май 26, 2023

Abstract The connection between soil nitrogen availability, leaf nitrogen, and photosynthetic capacity is not perfectly understood. Because these three components tend to be positively related over large spatial scales, some posit that drives which capacity. Alternatively, others primarily driven by above-ground conditions. Here, we examined the physiological responses of a non-nitrogen-fixing plant (Gossypium hirsutum) nitrogen-fixing (Glycine max) in fully factorial combination light availability help reconcile competing hypotheses. Soil stimulated both species, but relative proportion used for processes was reduced under elevated all treatments due greater increases content than chlorophyll biochemical process rates. Leaf rates G. hirsutum were more responsive changes those max, probably strong max investments root nodulation low nitrogen. Nonetheless, whole-plant growth significantly enhanced increased species. Light consistently allocation photosynthesis growth, pattern similar These results suggest nitrogen–photosynthesis relationship varies different levels species preferentially allocated non-photosynthetic processes, rather photosynthesis, as increased.

Язык: Английский

---

Leaf thermal safety margins decline at hotter temperatures in a natural warming ‘experiment’ in the Amazon

New Phytologist, Год журнала: 2023, Номер 241(4), С. 1447 - 1463

Опубликована: Ноя. 20, 2023

Summary The threat of rising global temperatures may be especially pronounced for low‐latitude, lowland plant species that have evolved under stable climatic conditions. However, little is known about how these acclimate to elevated temperatures. Here, we leveraged a strong, steep thermal gradient along natural geothermal river assess the ability woody plants in Amazon air We measured leaf traits six common tropical investigate whether individuals species: their thermoregulatory maintain despite higher ambient temperatures; photosynthetic tolerances withstand hotter and acclimation sufficient safety margins (TSMs) across different growth Individuals three acclimated traits, increased with temperature. was generally insufficient constant TSMs. Notwithstanding, health consistent Acclimation Amazonian too weak TSMs at high temperatures, supporting previous findings will increasingly vulnerable stress as rise.

Язык: Английский

---