Hervé Cochard
YOU?
Author Swipe
View article: PHOREAU v1.0: a new process-based model to predict forest functioning, from tree ecophysiology to forest dynamics and biogeography
PHOREAU v1.0: a new process-based model to predict forest functioning, from tree ecophysiology to forest dynamics and biogeography Open
Climate change impacts forest functioning and dynamics, but large uncertainties remain regarding the interactions between species composition, demographic processes and environmental drivers. While the effects of changing climates on indiv…
View article: Drought-Induced Epigenetic Memory in the cambium of Poplar Trees persists and primes future stress responses
Drought-Induced Epigenetic Memory in the cambium of Poplar Trees persists and primes future stress responses Open
Understanding how perennial plants such as trees perceive, integrate and memorize environmental stresses like water deficit is crucial in the context of climate change. We investigated short-term and transannual memory of water deficit in …
View article: Root vulnerability to embolism and lack of physiological recovery limit the competitive ability of an invasive palm
Root vulnerability to embolism and lack of physiological recovery limit the competitive ability of an invasive palm Open
Summary Climate change and invasive species both threaten forest ecosystems. While exacerbated droughts drive tree mortality, species invasion alters forest composition. Invasive plants may be more vulnerable to drought due to acquisitive …
View article: Beyond proxies: towards ecophysiological indicators of drought resistance for forest management
Beyond proxies: towards ecophysiological indicators of drought resistance for forest management Open
As drought-induced mortality increases globally in forest biomes, it becomes necessary for foresters to have access to reliable predictors of species vulnerability to drought and mortality risk under different climatic scenarios. On one ha…
View article: PHOREAU v1.0: a new process-based model to predict forest functioning, from tree ecophysiology to forest dynamics and biogeography
PHOREAU v1.0: a new process-based model to predict forest functioning, from tree ecophysiology to forest dynamics and biogeography Open
Climate change impacts forest functioning and dynamics, but large uncertainties remain regarding the interactions between species composition, demographic processes and environmental drivers. While the effects of changing climates on indiv…
View article: Acclimation to High Vapor Pressure Deficit in Warmer Air Can Reduce Tree Vulnerability to Drought‐Induced Mortality
Acclimation to High Vapor Pressure Deficit in Warmer Air Can Reduce Tree Vulnerability to Drought‐Induced Mortality Open
Climate change imposes new constraints on tree survival, emphasising two key parameters: the vapour pressure deficit (VPD) and air temperature. Yet, no study has experimentally evaluated drought‐induced tree mortality risk following acclim…
View article: Minimum leaf conductance variability during drought, towards a stable measurement protocol
Minimum leaf conductance variability during drought, towards a stable measurement protocol Open
International audience
View article: Minimum leaf conductance during drought: unravelling its variability and impact on plant survival
Minimum leaf conductance during drought: unravelling its variability and impact on plant survival Open
Summary Leaf water loss after stomatal closure is key to understanding the effects of prolonged drought on vegetation. It is therefore important to accurately quantify such water losses to improve physiology‐based models of drought‐induced…
View article: Resolving the contrasting leaf hydraulic adaptation of <scp>C<sub>3</sub></scp> and <scp>C<sub>4</sub></scp> grasses
Resolving the contrasting leaf hydraulic adaptation of <span>C<sub>3</sub></span> and <span>C<sub>4</sub></span> grasses Open
Summary Grasses are exceptionally productive, yet their hydraulic adaptation is paradoxical. Among C 3 grasses, a high photosynthetic rate ( A area ) may depend on higher vein density ( D v ) and hydraulic conductance ( K leaf ). However, …
View article: Tree drought–mortality risk depends more on intrinsic species resistance than on stand species diversity
Tree drought–mortality risk depends more on intrinsic species resistance than on stand species diversity Open
Increasing tree diversity is considered a key management option to adapt forests to climate change. However, the effect of species diversity on a forest's ability to cope with extreme drought remains elusive. In this study, we assessed dro…
View article: Measuring tree water content directly in the field with portable MRI
Measuring tree water content directly in the field with portable MRI Open
International audience
View article: Partial asynchrony of coniferous forest carbon sources and sinks at the intra-annual time scale
Partial asynchrony of coniferous forest carbon sources and sinks at the intra-annual time scale Open
View article: Hydraulic plasticity and water use regulation act to maintain the hydraulic safety margins of Mediterranean trees in rainfall exclusion experiments
Hydraulic plasticity and water use regulation act to maintain the hydraulic safety margins of Mediterranean trees in rainfall exclusion experiments Open
Hydraulic failure due to xylem embolism has been identified as one of the main mechanisms involved in drought‐induced forest decline. Trees vulnerability to hydraulic failure depends on their hydraulic safety margin (HSM). While it has bee…
View article: Exploring the role of plant hydraulics in canopy fuel moisture content: insights from an experimental drought study on Pinus halepensis Mill. and Quercus ilex L.
Exploring the role of plant hydraulics in canopy fuel moisture content: insights from an experimental drought study on Pinus halepensis Mill. and Quercus ilex L. Open
View article: In vivo X-ray microtomography locally affects stem radial growth with no immediate physiological impact
In vivo X-ray microtomography locally affects stem radial growth with no immediate physiological impact Open
Microcomputed tomography (µCT) is a nondestructive X-ray imaging method used in plant physiology to visualize in situ plant tissues that enables assessments of embolized xylem vessels. Whereas evidence for X-ray-induced cellular damage has…
View article: Isohydricity and hydraulic isolation explain reduced hydraulic failure risk in an experimental tree species mixture
Isohydricity and hydraulic isolation explain reduced hydraulic failure risk in an experimental tree species mixture Open
Species mixture is promoted as a crucial management option to adapt forests to climate change. However, there is little consensus on how tree diversity affects tree water stress, and the underlying mechanisms remain elusive. By using a gre…
View article: Residual water losses mediate the trade-off between growth and drought survival across saplings of 12 tropical rainforest tree species with contrasting hydraulic strategies
Residual water losses mediate the trade-off between growth and drought survival across saplings of 12 tropical rainforest tree species with contrasting hydraulic strategies Open
Knowledge of the physiological mechanisms underlying species vulnerability to drought is critical for better understanding patterns of tree mortality. Investigating plant adaptive strategies to drought should thus help to fill this knowled…
View article: Negative pressure & fast embolism in biomimetic leaves
Negative pressure & fast embolism in biomimetic leaves Open
International audience
View article: The spreading of air embolism in tree leaves: High speed imaging
The spreading of air embolism in tree leaves: High speed imaging Open
International audience
View article: Air invasion in a biomimetic leaf-on-chip
Air invasion in a biomimetic leaf-on-chip Open
International audience
View article: Twenty years of irrigation acclimation is driven by denser canopies and not by plasticity in twig- and needle-level hydraulics in a <i>Pinus sylvestris</i> forest
Twenty years of irrigation acclimation is driven by denser canopies and not by plasticity in twig- and needle-level hydraulics in a <i>Pinus sylvestris</i> forest Open
Climate change is predicted to increase atmospheric vapor pressure deficit, exacerbating soil drought, and thus enhancing tree evaporative demand and mortality. Yet, few studies have addressed the longer-term drought acclimation strategy o…
View article: Towards portable MRI in the plant sciences
Towards portable MRI in the plant sciences Open
View article: Talk is cheap: rediscovering sounds made by plants
Talk is cheap: rediscovering sounds made by plants Open
A recent study and related commentaries have raised new interest in the phenomenon of ultrasonic sound production by plants exposed to stress, especially drought. While recent technological advancements have allowed the demonstration that …
View article: Plant hydraulics at the heart of plant, crops and ecosystem functions in the face of climate change
Plant hydraulics at the heart of plant, crops and ecosystem functions in the face of climate change Open
Summary Plant hydraulics is crucial for assessing the plants' capacity to extract and transport water from the soil up to their aerial organs. Along with their capacity to exchange water between plant compartments and regulate evaporation,…
View article: Interactions between beech and oak seedlings can modify the effects of hotter droughts and the onset of hydraulic failure
Interactions between beech and oak seedlings can modify the effects of hotter droughts and the onset of hydraulic failure Open
Summary Mixing species with contrasting resource use strategies could reduce forest vulnerability to extreme events. Yet, how species diversity affects seedling hydraulic responses to heat and drought, including mortality risk, is largely …
View article: What epigenetics can bring to (plant) physiologists and ecologists in a climate change context
What epigenetics can bring to (plant) physiologists and ecologists in a climate change context Open
View article: Scots pines colonizing the harsh environment of volcano slopes increased their hydraulic safety margin
Scots pines colonizing the harsh environment of volcano slopes increased their hydraulic safety margin Open
View article: Photosynthesis, leaf hydraulic conductance and embolism dynamics in the resurrection plant <i>Barbacenia purpurea</i>
Photosynthesis, leaf hydraulic conductance and embolism dynamics in the resurrection plant <i>Barbacenia purpurea</i> Open
The main parameters determining photosynthesis are stomatal and mesophyll conductance and electron transport rate, and for hydraulic dynamics they are leaf hydraulic conductance and the spread of embolism. These parameters have scarcely be…
View article: Xylem water transport is influenced by age and winter pruning characteristics in grapevine (<i>Vitis vinifera</i>)
Xylem water transport is influenced by age and winter pruning characteristics in grapevine (<i>Vitis vinifera</i>) Open
In order to investigate the effect of age and pruning characteristics on grapevine hydraulic conduction, a study was carried out between 2017 and 2020. Two pruning regimes (respecting or not sap flow pathways) and two vine age levels (olde…
View article: Xylem embolism and bubble formation during freezing suggest complex dynamics of pressure in <i>Betula pendula</i> stems
Xylem embolism and bubble formation during freezing suggest complex dynamics of pressure in <i>Betula pendula</i> stems Open
Freeze–thaw-induced embolism, a key limiting factor for perennial plants results from the formation of gas bubbles during freezing and their expansion during thawing. However, the ice volumetric increase generates local pressures, which ca…