Leaf morphological traits as adaptations to multiple climate gradients

Journal of Ecology, Год журнала: 2022, Номер 110(6), С. 1344 - 1355

Опубликована: Март 22, 2022

Leaf morphological traits vary systematically along climatic gradients. However, recent studies in plant functional ecology have mainly analysed quantitative traits, while numerical models of species distributions and vegetation function focused on associated with resource acquisition; both ignore the wider significance leaf morphology.A dataset comprising 22 for 662 woody from 92 sites, representing all biomes present China, was subjected to multivariate analysis order identify leading dimensions trait covariation (correspondence analysis), quantify phylogenetic contributions (canonical correspondence variation partitioning) characterise co-occurring syndromes (

Язык: Английский

---

Intraspecific trait variation and resource allocation trade-offs under water stress unveil divergent survival strategies in emergent macrophyteTabs amid climate change

Environmental and Experimental Botany, Год журнала: 2025, Номер unknown, С. 106105 - 106105

Опубликована: Фев. 1, 2025

Язык: Английский

---

Physiological response and photosynthetic recovery to an extreme drought: Evidence from plants in a dry-hot valley savanna of Southwest China

The Science of The Total Environment, Год журнала: 2023, Номер 868, С. 161711 - 161711

Опубликована: Янв. 20, 2023

The frequency of extreme drought events has been rising worldwide, but due to its unpredictability, how plants will respond remains poorly understood. Here, we aimed characterize the hydraulics and photosynthesis savanna drought, tested whether they can subsequently recover after drought. There was an in 2019 Southwest (SW) China. We investigated photosynthetic gas exchange, leaf-, stem-, whole-shoot hydraulic conductance 18 plant species with diverse leaf habits (deciduous, semi-deciduous evergreen) growth forms (tree shrub) from a dry-hot valley SW China for three rainy seasons 2021. also compared exchange those regular year (2014). found that stomatal maximum rate were significantly lower during than wetter years. In 2019, all studied maintained at their minimum level observed, which could be related high vapor pressure deficits (VPD, >2 kPa). However, no significant difference stem shoot detected across reductions regulation under might help keep function. Stomatal (2020 2021) showed comparable or even higher values 2014, suggesting recovery exchange. addition, response traits convergent forms. Our results better understand physiological mechanism underlying ecosystems climate change.

Язык: Английский

---

Principles for satellite monitoring of vegetation carbon uptake

Nature Reviews Earth & Environment, Год журнала: 2024, Номер 5(11), С. 818 - 832

Опубликована: Окт. 29, 2024

Язык: Английский

---

Vertical variation in leaf functional traits of Parashorea chinensis with different canopy layers

Frontiers in Plant Science, Год журнала: 2024, Номер 15

Опубликована: Янв. 29, 2024

Introduction Canopy species need to shift their ecological adaptation improve light and water resources utilization, the study of intraspecific variations in plant leaf functional traits based at individual scale is great significance for evaluating adaptability climate change. Methods In this study, we evaluate how giant trees relate spatial niche specialization along a vertical gradient. We sampled tropical flagship Parashorea chinensis around 60 meters tall divided crowns into three layers. Fourteen key including morphology, photosynthetic, hydraulic chemical physiology were measured each canopy layer investigate variation interrelationships between different traits. Additionally, due potential impact measurement methods ( in-situ ex-situ branch) on photosynthetic physiological parameters, also compared effects these two gas exchange measurements. Results discussion In-situ measurements revealed that most individual-to-individual P. varied significantly heights. Leaf such as midday (MWP) osmotic (OP) insignificantly correlated with maximal net assimilation rate per mass A ). addition, discrepancies found parameters. The caused decrease by 53.63%, 27.86%, 38.05% , 50.00%, 19.21%, 27.90% saturation point These findings provided insights our understanding response mechanisms micro-habitat Xishuangbanna seasonal rainforests fine adaption resultant decoupled traits, which have implications strategies under environmental changes.

Язык: Английский

---

The China plant trait database version 2

Scientific Data, Год журнала: 2022, Номер 9(1)

Опубликована: Дек. 15, 2022

Plant functional traits represent adaptive strategies to the environment, linked biophysical and biogeochemical processes ecosystem functioning. Compilations of trait data facilitate research in multiple fields from plant ecology through land-surface modelling. Here we present version 2 China Trait Database, which contains information on morphometric, physical, chemical, photosynthetic hydraulic 1529 unique species 140 sites spanning a diversity vegetation types. Version has five improvements compared previous version: (1) new 4-km elevation transect edge Tibetan Plateau, including alpine types not sampled previously; (2) inclusion related processes, specific sapwood conductance, area ratio leaf, wood density turgor loss point; (3) soil properties complement existing climate (4) assessments flagging reliability individual measurements; (5) standardized templates for systematical field sampling measurements.

Язык: Английский

---

Global patterns and drivers of leaf photosynthetic capacity: The relative importance of environmental factors and evolutionary history

Global Ecology and Biogeography, Год журнала: 2023, Номер 32(5), С. 668 - 682

Опубликована: Март 16, 2023

Abstract Aim Understanding the considerable variability and drivers of global leaf photosynthetic capacity [indicated by maximum carboxylation rate standardized to 25°C ( V c,max25 )] is an essential step for accurate modelling terrestrial plant photosynthesis carbon uptake under climate change. Although current environmental conditions have often been connected with empirical theoretical models explain through acclimatization adaptation, long‐term evolutionary history has largely neglected, but might also explicitly play a role in shaping variability. Location Global. Time period Contemporary. Major taxa studied Terrestrial plants. Methods We compiled geographically comprehensive dataset C 3 plants n = 6917 observations from 2157 species 425 sites covering all major biomes world‐wide), explored biogeographical phylogenetic patterns , quantified relative importance factors driving Results found that differed across different biomes, higher mean values relatively drier regions, life‐forms, non‐woody woody legumes non‐leguminous The displayed significant signal diverged contrasting manner groups, trend along axis towards more modern clades. A Bayesian linear mixed model revealed (indicated phylogeny species) explained nearly 3‐fold variation than present‐day environment (53 vs. 18%). Main conclusions These findings contribute assessment variability, highlighting hence photosynthesis.

Язык: Английский

---

Incorporating photosynthetic acclimation improves stomatal optimisation models

Plant Cell & Environment, Год журнала: 2024, Номер 47(9), С. 3478 - 3493

Опубликована: Апрель 8, 2024

Stomatal opening in plant leaves is regulated through a balance of carbon and water exchange under different environmental conditions. Accurate estimation stomatal regulation crucial for understanding how plants respond to changing conditions, particularly climate change. A new generation optimality-based modelling schemes determines instantaneous responses from trade-offs between gains hydraulic costs, but most such do not account biochemical acclimation response drought. Here, we compare the performance six optimisation models with without accounting photosynthetic acclimation. Using experimental data 37 species, found that improves prediction assimilation majority tested models. Photosynthetic contributed significantly reduction photosynthesis drought conditions all Drought effects on could accurately be explained by impairment functions embedded alone, indicating must considered improve estimates during

Язык: Английский

---

Role of hydraulic traits in stomatal regulation of transpiration under different vapour pressure deficits across five Mediterranean tree crops

Journal of Experimental Botany, Год журнала: 2023, Номер 74(15), С. 4597 - 4612

Опубликована: Апрель 28, 2023

The differential stomatal regulation of transpiration among plant species in response to water deficit is not fully understood, although several hydraulic traits have been reported influence it. This knowledge gap partly due a lack direct and concomitant experimental data on transpiration, conductance, traits. We measured sap flux density (Js), conductance (gs), different five crop species. Our aim was contribute establishing the causal relationship between consumption its using trait-based approach. results showed that species-specific Js by gs overall coordinated with functional analysed. Particularly relevant negative significant found Huber value (Hv) analogue ratio maximum (Jsmax/gsmax) which can be understood as compensation maintain supply leaves. Hv also significantly related slope vapour pressure explained most variability, adding up evidence recognizing major trait relations. Thus, basis for tree use should considered.

Язык: Английский

---

The Role of the Intraspecific Variability of Hydraulic Traits for Modeling the Plant Water Use in Different European Forest Ecosystems

Journal of Advances in Modeling Earth Systems, Год журнала: 2024, Номер 16(3)

Опубликована: Фев. 29, 2024

Abstract The drought resilience of forest ecosystems is generally believed to depend on the dominant tree species' hydraulic traits. These traits define maximum water transport capacity and degree vulnerability failure a species. This work evaluates effect intraspecific variability simulated use in Community Land Model (CLM, version 5.0). We selected two contrasting broadleaved species performed series numerical experiments by modifying parameters plant curve xylem conductance accounting for within each Our prescribed parameter sets represent vulnerable resistant responses deficit. At sites with an ample supply, configuration simulates reduced stress increased transpiration compared configuration. Meanwhile, model results are counter‐intuitive at temporarily dry when availability limiting factor. demonstrate emergent role as modulator strategy model. Using default value conductance, tends overestimate early summer drier sites, forcing vegetation experience unrealistic later year. findings suggest that parameterization important yet unresolved problem CLM similar land surface models.

Язык: Английский

---