Search results for: Nina Buchmann

Items from 1 to 20 out of 128 results

article

Drought effects on trait space of winter wheat are independent of land management

Qing Sun, Anna K. Gilgen, Raphaël Wittwer, Georg Arx, more

Investigating plant responses to climate change is key to develop suitable adaptation strategies. However, whether changes in land management can alleviate increasing drought threats to crops in the future is still unclear. We conducted a management × drought experiment with winter wheat (Triticum aestivum L.) to study plant water and vegetative traits in response to drought and management (conventional...

article

Finding the balance between open access to forest data while safeguarding the integrity of National Forest Inventory‐derived information

Arthur Gessler, Marcus Schaub, Arun Bose, Volodymyr Trotsiuk, more

New Phytologist > 242 > 2 > 344 - 346

article

Long‐term changes in forest response to extreme atmospheric dryness

Ankit Shekhar, Lukas Hörtnagl, Nina Buchmann, Mana Gharun

Global Change Biology > 29 > 18 > 5379 - 5396

Atmospheric dryness, as indicated by vapor pressure deficit (VPD), has a strong influence on forest greenhouse gas exchange with the atmosphere. In this study, we used long‐term (10–30 years) net ecosystem productivity (NEP) measurements from 60 forest sites across the world (1003 site‐years) to quantify long‐term changes in forest NEP resistance and NEP recovery in response to extreme atmospheric...

article

Hydrogen isotope fractionation in carbohydrates of leaves and xylem tissues follows distinct phylogenetic patterns: a common garden experiment with 73 tree and shrub species

Philipp Schuler, Valentina Vitali, Matthias Saurer, Arthur Gessler, more

New Phytologist > 239 > 2 > 547 - 561

Recent methodological advancements in determining the nonexchangeable hydrogen isotopic composition (δ²H_ne) of plant carbohydrates make it possible to disentangle the drivers of hydrogen isotope (²H) fractionation processes in plants. Here, we investigated the influence of phylogeny on the δ²H_ne of twig xylem cellulose and xylem water, as well as leaf sugars and leaf water, across 73 Northern Hemisphere...

article

Daytime stomatal regulation in mature temperate trees prioritizes stem rehydration at night

Richard L. Peters, Kathy Steppe, Christoforos Pappas, Roman Zweifel, more

New Phytologist > 239 > 2 > 533 - 546

Trees remain sufficiently hydrated during drought by closing stomata and reducing canopy conductance (G_c) in response to variations in atmospheric water demand and soil water availability. Thresholds that control the reduction of G_c are proposed to optimize hydraulic safety against carbon assimilation efficiency. However, the link between G_c and the ability of stem tissues to rehydrate at night remains...

article

ForestClim—Bioclimatic variables for microclimate temperatures of European forests

Stef Haesen, Jonas J. Lembrechts, Pieter De Frenne, Jonathan Lenoir, more

Global Change Biology > 29 > 11 > 2886 - 2892

Microclimate research gained renewed interest over the last decade and its importance for many ecological processes is increasingly being recognized. Consequently, the call for high‐resolution microclimatic temperature grids across broad spatial extents is becoming more pressing to improve ecological models. Here, we provide a new set of open‐access bioclimatic variables for microclimate temperatures...

article

Impact of warmer and drier conditions on tree photosynthetic properties and the role of species interactions

Margaux Didion‐Gency, Arthur Gessler, Nina Buchmann, Jonas Gisler, more

New Phytologist > 236 > 2 > 547 - 560

Increased temperature and prolonged soil moisture reduction have distinct impacts on tree photosynthetic properties. Yet, our knowledge of their combined effect is limited. Moreover, how species interactions alter photosynthetic responses to warming and drought remains unclear. Using mesocosms, we studied how photosynthetic properties of European beech and downy oak were impacted by multi‐year...

article

Long‐term recovery of above‐ and below‐ground interactions in restored grasslands after topsoil removal and seed addition

Monika Carol Resch, Martin Schütz, Raúl Ochoa‐Hueso, Nina Buchmann, more

Journal of Applied Ecology > 59 > 9 > 2299 - 2308

Evaluation of restoration activities is indispensable to assess the extent to which targets have been reached. Usually, the main goal of ecological restoration is to restore biodiversity and ecosystem functioning, but validation is often based on a single indicator, which may or may not cope with whole‐ecosystem dynamics. Network analyses are, however, powerful tools, allowing to examine both the...

article

Global maps of soil temperature

Jonas J. Lembrechts, Johan Hoogen, Juha Aalto, Michael B. Ashcroft, more

Global Change Biology > 28 > 9 > 3110 - 3144

Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic...

article

Uncovering the critical soil moisture thresholds of plant water stress for European ecosystems

Zheng Fu, Philippe Ciais, David Makowski, Ana Bastos, more

Global Change Biology > 28 > 6 > 2111 - 2123

Understanding the critical soil moisture (SM) threshold (θ_crit) of plant water stress and land surface energy partitioning is a basis to evaluate drought impacts and improve models for predicting future ecosystem condition and climate. Quantifying the θ_crit across biomes and climates is challenging because observations of surface energy fluxes and SM remain sparse. Here, we used the latest database...

article

Number of growth days and not length of the growth period determines radial stem growth of temperate trees

Sophia Etzold, Frank Sterck, Arun K. Bose, Sabine Braun, more

Ecology Letters > 25 > 2 > 427 - 439

Radial stem growth dynamics at seasonal resolution are essential to understand how forests respond to climate change. We studied daily radial growth of 160 individuals of seven temperate tree species at 47 sites across Switzerland over 8 years. Growth of all species peaked in the early part of the growth season and commenced shortly before the summer solstice, but with species‐specific seasonal patterns...

article

A high‐temperature water vapor equilibration method to determine non‐exchangeable hydrogen isotope ratios of sugar, starch and cellulose

Philipp Schuler, Marc‐André Cormier, Roland A. Werner, Nina Buchmann, more

Plant, Cell & Environment > 45 > 1 > 12 - 22

The analysis of the non‐exchangeable hydrogen isotope ratio (δ²H_ne) in carbohydrates is mostly limited to the structural component cellulose, while simple high‐throughput methods for δ²H_ne values of non‐structural carbohydrates (NSC) such as sugar and starch do not yet exist. Here, we tested if the hot vapor equilibration method originally developed for cellulose is applicable for NSC, verified by...

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

ForestTemp – Sub‐canopy microclimate temperatures of European forests

Stef Haesen, Jonas J. Lembrechts, Pieter De Frenne, Jonathan Lenoir, more

Global Change Biology > 27 > 23 > 6307 - 6319

Ecological research heavily relies on coarse‐gridded climate data based on standardized temperature measurements recorded at 2 m height in open landscapes. However, many organisms experience environmental conditions that differ substantially from those captured by these macroclimatic (i.e. free air) temperature grids. In forests, the tree canopy functions as a thermal insulator and buffers sub‐canopy...

article

Cropping systems alter hydraulic traits of barley but not pea grown in mixture

Qing Sun, Anna K. Gilgen, Constant Signarbieux, Valentin H. Klaus, more

Plant, Cell & Environment > 44 > 9 > 2912 - 2924

Extreme events such as drought and heatwaves are among the biggest challenges to agricultural production and food security. However, the effects of cropping systems on drought resistance of arable crops via their hydraulic behaviour remain unclear. We investigated how hydraulic traits of a field‐grown pea‐barley (Pisum sativum L. and Hordeum vulgare L.) mixture were affected by different cropping...

article

Why trees grow at night

Roman Zweifel, Frank Sterck, Sabine Braun, Nina Buchmann, more

New Phytologist > 231 > 6 > 2174 - 2185

The timing of diel stem growth of mature forest trees is still largely unknown, as empirical data with high temporal resolution have not been available so far. Consequently, the effects of day–night conditions on tree growth remained uncertain. Here we present the first comprehensive field study of hourly‐resolved radial stem growth of seven temperate tree species, based on 57 million underlying...

article

Tree growth in Switzerland is increasingly constrained by rising evaporative demand

Volodymyr Trotsiuk, Flurin Babst, Charlotte Grossiord, Arthur Gessler, more

Journal of Ecology > 109 > 8 > 2981 - 2990

The response of trees to intra‐annual environmental constraints varies temporally throughout a growing season and spatially across landscapes. A better understanding of these dynamics will help us anticipate the impacts of short‐term climate variability and medium‐term climate change on forests. Using the process‐based 3‐PG forest ecosystem model, we assessed the spatial manifestation and seasonal...

article

Rethinking temperature effects on leaf growth, gene expression and metabolism: Diel variation matters

Lukas Kronenberg, Steven Yates, Shiva Ghiasi, Lukas Roth, more

Plant, Cell & Environment > 44 > 7 > 2262 - 2276

Plants have evolved to grow under prominently fluctuating environmental conditions. In experiments under controlled conditions, temperature is often set to artificial, binary regimes with constant values at day and at night. This study investigated how such a diel (24 hr) temperature regime affects leaf growth, carbohydrate metabolism and gene expression, compared to a temperature regime with a field‐like...

article

Biodiversity facets affect community surface temperature via 3D canopy structure in grassland communities

Claudia Guimarães‐Steinicke, Alexandra Weigelt, Raphaël Proulx, Thomas Lanners, more

Journal of Ecology > 109 > 5 > 1969 - 1985

Canopy structure is an important driver of the energy budget of grassland ecosystem and is, at the same time, altered by plant diversity. Diverse plant communities typically have taller and more densely packed canopies than less diverse communities. With this, they absorb more radiation, have a higher transpiring leaf surface and are better coupled to the atmosphere which leads to cooler canopy...

article

COSORE: A community database for continuous soil respiration and other soil‐atmosphere greenhouse gas flux data

Ben Bond‐Lamberty, Danielle S. Christianson, Avni Malhotra, Stephanie C. Pennington, more

Global Change Biology > 26 > 12 > 7268 - 7283

Globally, soils store two to three times as much carbon as currently resides in the atmosphere, and it is critical to understand how soil greenhouse gas (GHG) emissions and uptake will respond to ongoing climate change. In particular, the soil‐to‐atmosphere CO₂ flux, commonly though imprecisely termed soil respiration (R_S), is one of the largest carbon fluxes in the Earth system. An increasing number...

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INFONA - science communication portal

Search results for: Nina Buchmann

Drought effects on trait space of winter wheat are independent of land management

Finding the balance between open access to forest data while safeguarding the integrity of National Forest Inventory‐derived information

Long‐term changes in forest response to extreme atmospheric dryness

Hydrogen isotope fractionation in carbohydrates of leaves and xylem tissues follows distinct phylogenetic patterns: a common garden experiment with 73 tree and shrub species

Daytime stomatal regulation in mature temperate trees prioritizes stem rehydration at night

ForestClim—Bioclimatic variables for microclimate temperatures of European forests

Impact of warmer and drier conditions on tree photosynthetic properties and the role of species interactions

Long‐term recovery of above‐ and below‐ground interactions in restored grasslands after topsoil removal and seed addition

Global maps of soil temperature

Uncovering the critical soil moisture thresholds of plant water stress for European ecosystems

Number of growth days and not length of the growth period determines radial stem growth of temperate trees

A high‐temperature water vapor equilibration method to determine non‐exchangeable hydrogen isotope ratios of sugar, starch and cellulose

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

ForestTemp – Sub‐canopy microclimate temperatures of European forests

Cropping systems alter hydraulic traits of barley but not pea grown in mixture

Why trees grow at night

Tree growth in Switzerland is increasingly constrained by rising evaporative demand

Rethinking temperature effects on leaf growth, gene expression and metabolism: Diel variation matters

Biodiversity facets affect community surface temperature via 3D canopy structure in grassland communities

COSORE: A community database for continuous soil respiration and other soil‐atmosphere greenhouse gas flux data

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