Search results for: Christoph Bachofen

Items from 1 to 12 out of 12 results

article

Tree water uptake patterns across the globe

Christoph Bachofen, Shersingh Joseph Tumber‐Dávila, D. Scott Mackay, Nate G. McDowell, more

New Phytologist > 242 > 5 > 1891 - 1910

Plant water uptake from the soil is a crucial element of the global hydrological cycle and essential for vegetation drought resilience. Yet, knowledge of how the distribution of water uptake depth (WUD) varies across species, climates, and seasons is scarce relative to our knowledge of aboveground plant functions. With a global literature review, we found that average WUD varied more among biomes...

article

Absence of canopy temperature variation despite stomatal adjustment in Pinus sylvestris under multidecadal soil moisture manipulation

Alice Gauthey, Christoph Bachofen, Janisse Deluigi, Margaux Didion‐Gency, more

New Phytologist > 240 > 1 > 127 - 137

Global warming and droughts push forests closer to their thermal limits, altering tree carbon uptake and growth. To prevent critical overheating, trees can adjust their thermotolerance (T_crit), temperature and photosynthetic optima (T_opt and A_opt), and canopy temperature (T_can) to stay below damaging thresholds. However, we lack an understanding of how soil droughts affect photosynthetic thermal...

article

Stand structure of Central European forests matters more than climate for transpiration sensitivity to VPD

Christoph Bachofen, Rafael Poyatos, Víctor Flo, Jordi Martínez‐Vilalta, more

Journal of Applied Ecology > 60 > 5 > 886 - 897

Temperature rise and more severe and frequent droughts will alter forest transpiration, thereby affecting the global water cycle. Yet, tree responses to increased atmospheric vapour pressure deficit (VPD) and reduced soil water content (SWC) are not fully understood due to long‐term tree adjustments to local environmental conditions that modify transpiration responses to short‐term VPD and SWC...

article

Warming may extend tree growing seasons and compensate for reduced carbon uptake during dry periods

Charlotte Grossiord, Christoph Bachofen, Jonas Gisler, Eugénie Mas, more

Journal of Ecology > 110 > 7 > 1575 - 1589

Warming and drought alter plant phenology, photosynthesis and growth with important consequences for the global carbon cycle and the earth's climate. Yet, few studies have attempted to tease apart their effects on tree phenology, particularly leaf senescence, and on source and sink activity. We experimentally assessed the single and combined effects of warming and reduced soil moisture on the...

article

Phenotypic plasticity versus ecotypic differentiation under recurrent summer drought in two drought‐tolerant pine species

Christoph Bachofen, Anouchka Perret‐Gentil, Thomas Wohlgemuth, Pierre Vollenweider, more

Journal of Ecology > 109 > 11 > 3861 - 3876

Despite worldwide reports of high tree mortality, growing evidence indicates that many tree species are well adapted to survive repeated dry spells. The drought resilience of trees is related to their phenotypic plasticity and ecotypic differentiation. Whether these two mechanisms act at the same organisational level of a tree and involve similar plant traits is still unknown. We assessed phenotypic...

article

Interactive effects of tree species mixture and climate on foliar and woody trait variation in a widely distributed deciduous tree

Margaux Didion‐Gency, Christoph Bachofen, Nina Buchmann, Arthur Gessler, more

Functional Ecology > 35 > 11 > 2397 - 2408

Despite increasing reports of severe drought and heat impacts on forest ecosystems, community‐level processes, which could potentially modulate tree responses to climatic stress, are rarely accounted for. While numerous studies indicate a positive effect of species diversity on a wide range of ecosystem functions and services, little is known about how species interactions influence tree responses...

article

Remote sensing of forest gas exchange: Considerations derived from a tomographic perspective

Alexander Damm, Eugenie Paul‐Limoges, Daniel Kükenbrink, Christoph Bachofen, more

Global Change Biology > 26 > 4 > 2717 - 2727

The global exchange of gas (CO₂, H₂O) and energy (sensible and latent heat) between forest ecosystems and the atmosphere is often assessed using remote sensing (RS) products. Although these products are essential in quantifying the spatial variability of forest–atmosphere exchanges, large uncertainties remain from a measurement bias towards top of canopy fluxes since optical RS data are not sensitive...

article

Biomass partitioning in a future dry and CO₂ enriched climate: Shading aggravates drought effects in Scots pine but not European black pine seedlings

Christoph Bachofen, Thomas Wohlgemuth, Barbara Moser, Lei Cheng

Journal of Applied Ecology > 56 > 4 > 866 - 879

Climate change alters both water and CO₂ availability for plants, but it is largely unknown how they interact with light to affect tree seedling establishment and early growth. Light availability is often regulated by forest management, thus understanding how these resources co‐limit the regeneration success of tree species and populations with contrasting drought tolerances is essential for adaptive...

article

No carbon “bet hedging” in pine seedlings under prolonged summer drought and elevated CO₂

Christoph Bachofen, Barbara Moser, Günter Hoch, Jaboury Ghazoul, more

Journal of Ecology > 106 > 1 > 31 - 46

More frequent drought episodes are expected to cause higher mortality in isohydric tree species such as pines, because individuals close their stomata early during drought in order to maintain constant needle water potentials. It has been suggested that trees delay the ensuing carbon starvation by actively storing carbon at the expense of growth (“bet hedging”). Because such a strategy is only...

article

Root architecture might account for contrasting establishment success of Pseudotsuga menziesii var. menziesii and Pinus sylvestris in Central Europe under dry conditions

Barbara Moser, Christoph Bachofen, Jonathan D. Müller, Marek Metslaid, more

Annals of Forest Science > 2016 > 73 > 4 > 959-970

Key messagePinus sylvestrisseedlings quickly expand their roots to deeper soil layers whilePseudotsuga menziesiiconcentrates its root system in the topsoil, thereby running the risk of desiccation during long dry spells, as indicated by lower survival after simulated summer drought.ContextPseudotsuga menziesii (Douglas-fir) is regarded as a promising species to maintain the productivity of Central...

article

Cold temperature extremes during spring do not limit the range shift of Mediterranean pines into regions with intermittent frost

Christoph Bachofen, Thomas Wohlgemuth, Jaboury Ghazoul, Barbara Moser, more

Functional Ecology > 30 > 6 > 856 - 865

Bioclimatic envelope models have predicted latitudinal range shifts of tree species in Europe following climate change. Accordingly, Mediterranean species will be able to migrate northwards if climatic conditions become warmer and dryer. Frost, on the other hand, is an important and recurring factor in temperate and boreal regions causing damage to buds and leaves, and potentially limiting the...

article

Are landscape structures insurmountable barriers for foraging bees? A mark-recapture study with two solitary pollen specialist species

Antonia Zurbuchen, Christoph Bachofen, Andreas Müller, Silke Hein, more

Apidologie > 2010 > 41 > 4 > 497-508

To investigate whether landscape structures act as insurmountable barriers for foraging bees, we conducted mark-recapture studies with two pollen-specialist solitary species. Foraging options of the bees were confined to host plant stands across different landscape structures. Differences in altitude of more than 130 m were overcome and forests covering a distance of up to 480 m were crossed by Chelostoma florisomne...

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PHENOTYPIC PLASTICITY (3)
PINUS SYLVESTRIS (3)
FUNCTIONAL TRAITS (2)
PHOTOSYNTHESIS (2)
PINUS NIGRA (2)
SHOOT GROWTH (2)
3D RADIATIVE TRANSFER MODELLING (1)
ANATOMY (1)
ASSISTED MIGRATION (1)
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CHELOSTOMA FLORISOMNE (1)
CLIMATIC STRESS (1)
CO 2 (1)
COLD HARDINESS (1)
COMMON GARDEN (1)
C‐ALLOCATION (1)
C‐STORAGE (1)
DART (1)
DISTANCE D’APPROVISIONNEMENT (1)
DOUGLAS-FIR (1)
DROUGHT (1)
DROUGHT MORTALITY (1)
DROUGHT SURVIVAL (1)
DROUGHT TOLERANCE (1)
ECOPHYSIOLOGY (1)
ECOTYPIC DIFFERENTIATION (1)
EDDY COVARIANCE (1)
ELEVATED CO2 (1)
FAGUS SYLVATICA (1)
FAGUS SYLVATICA L. (1)
FOLIAR MACRONUTRIENTS (1)
FORAGING DISTANCE (1)
FRAGMENTATION (1)
FRAGMENTIERUNG (1)
GROWTH (1)
HOPLITIS ADUNCA (1)
HOPLITISADUNCA (1)
IRRIGATION (1)
J MAX (1)
LANDSCAPE BARRIER (1)
LANDSCHAFTSBARRIERE (1)
LEAF ANATOMY (1)
LIDAR (1)
LIGHT AVAILABILITY (1)
MEDITERRANEAN (1)
MORPHOLOGY (1)
NET CO2 ASSIMILATION (1)
NON‐STRUCTURAL CARBOHYDRATES (1)
OBSTACLES (1)
OPTIMAL PARTITIONING (1)
P. NIGRA (1)
P. SYLVESTRIS (1)
PAYSAGE (1)
PICEA ABIES (1)
PINUS HALEPENSIS (1)
PINUS SYLVESTRIS L. (1)
PLANT FUNCTIONAL TYPE (1)
PLASTICITY (1)
PRECIPITATION SEASONALITY (1)
QUERCUS ILEX (1)
QUERCUS PUBESCENS WILLD. (1)
RANGE SHIFT (1)
ROOT GROWTH (1)
ROOTING DEPTH (1)
SAMMELDISTANZ (1)
SAP FLOW (1)
SAPFLUXNET (1)
SCOTS PINE (1)
SEASONAL PLASTICITY (1)
SEEDLING MORTALITY; (1)
SENESCENCE (1)
SOIL–PLANT–ATMOSPHERE CONTINUUM MODEL (1)
SPAC MODEL (1)
SPECIES COMPOSITION (1)
STOMATAL CONDUCTANCE (1)
TEMPERATE FOREST ECOSYSTEMS (1)
TEMPERATURE RESPONSE (1)
THERMOREGULATION (1)
THINNING (1)
TRANSPIRATION (1)
TREE WATER SOURCE (1)
V CMAX (1)
VAPOUR PRESSURE DEFICIT (1)
VEGETATION PROCESS MODELS (1)
WARMING (1)
WATER STRESS (1)
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Wiley (10)
Springer (2)

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