Christian Körner
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View article: A saturating response of photosynthesis to an increasing leaf area index allows selective harvest of trees without affecting forest productivity
A saturating response of photosynthesis to an increasing leaf area index allows selective harvest of trees without affecting forest productivity Open
Maintaining or increasing forest carbon sinks is considered essential for mitigating the rise in atmospheric CO2 concentrations. In contrast, harvesting trees is perceived as having negative consequences for both the standing biomass stock…
View article: HLA-F expression on CD4 T cells in HIV-1 is linked to the presence of viremia and modulated by KIR3DS1
HLA-F expression on CD4 T cells in HIV-1 is linked to the presence of viremia and modulated by KIR3DS1 Open
KIR3DS1 is an activating natural killer (NK) cell receptor gene– present in 10-40% of humans– and is associated with extended AIDS-free survival. Although its ligand HLA-F has been identified, the underlying protective mechanism in HIV-1 i…
View article: Late Quaternary fluctuation in upper range limit of trees shapes endemic flora diversity on the Tibetan Plateau
Late Quaternary fluctuation in upper range limit of trees shapes endemic flora diversity on the Tibetan Plateau Open
View article: Saturating response of photosynthesis to increasing leaf area index allows selective harvest of trees without affecting forest productivity
Saturating response of photosynthesis to increasing leaf area index allows selective harvest of trees without affecting forest productivity Open
Maintaining or increasing forest carbon sinks is considered essential to mitigate the rise of atmospheric CO2 concentrations. Harvesting trees is perceived as having negative consequences on both the standing biomass stocks and the carbon …
View article: Air and Surface Temperatures Differently Drive Terrestrial Carbon and Water Cycles in the High Latitudes
Air and Surface Temperatures Differently Drive Terrestrial Carbon and Water Cycles in the High Latitudes Open
High‐latitude vegetation experience different temperatures than the ambient air temperature. While lacking a regional plant temperature product, we drove the dynamic ecosystem model, LPJ‐GUESS, with widely used ERA5‐land surface temperatur…
View article: Rapid advance of climatic tree limits in the Eastern Alps explained by on-site temperatures
Rapid advance of climatic tree limits in the Eastern Alps explained by on-site temperatures Open
In the European Alps, mean temperature has risen by 2.5 K since the end of the nineteenth century. A 2 K warming of the growing season has taken place in the last 4 decades only. The 2.5 K warming should rise the position of the climatic t…
View article: Consistent time allocation fraction to vegetation green-up versus senescence across northern ecosystems despite recent climate change
Consistent time allocation fraction to vegetation green-up versus senescence across northern ecosystems despite recent climate change Open
Extended growing season lengths under climatic warming suggest increased time for plant growth. However, research has focused on climatic impacts to the timing or duration of distinct phenological events. Comparatively little is known abou…
View article: Air and surface temperatures differently drive terrestrial carbon and water cycles in the high latitudes
Air and surface temperatures differently drive terrestrial carbon and water cycles in the high latitudes Open
High-latitude vegetation can experience much higher surface temperatures (Tsurf, at radiative equilibrium) than the ambient air temperature (Tair). In snow-free seasons, Tsurf is closely linked to plant phy…
View article: Treeline resposes to 2K warming in the Alps in half a century
Treeline resposes to 2K warming in the Alps in half a century Open
Since climatic treelines track the elevational position of isotherms across the globe, it is not the question if, but when and how they will arrive at a novel steady-state position. After briefly recalling the essential difference between …
View article: Experimental evidence, global patterns of treeline position and climate provide no substance for a lignin limitation hypothesis of tree growth
Experimental evidence, global patterns of treeline position and climate provide no substance for a lignin limitation hypothesis of tree growth Open
While the position of alpine and arctic treelines can be predicted by climatic data, the underlying biological mechanisms are still unclear. In a recent paper in this journal (Körner C, Lenz A, Hoch G (2023) Chronic in situ tissue cooling …
View article: Correction to: Weather modifies the spatial extent of carbohydrate transfers from CO2-supplied broad-leaved trees to ectomycorrhizal fungi
Correction to: Weather modifies the spatial extent of carbohydrate transfers from CO2-supplied broad-leaved trees to ectomycorrhizal fungi Open
View article: Belowground carbon transfer across mycorrhizal networks among trees: Facts, not fantasy
Belowground carbon transfer across mycorrhizal networks among trees: Facts, not fantasy Open
The mycorrhizal symbiosis between fungi and plants is among the oldest, ubiquitous and most important interactions in terrestrial life on Earth. Carbon (C) transfer across a common mycorrhizal network (CMN) was demonstrated over half a cen…
View article: Reply to: The three-dimensional structure of wood enables horizontal water transport needed to conduct water around lesions
Reply to: The three-dimensional structure of wood enables horizontal water transport needed to conduct water around lesions Open
View article: Concepts in Alpine Plant Ecology
Concepts in Alpine Plant Ecology Open
The alpine life zone is perhaps the only biome that occurs globally where mountains are high enough. At latitudinally varying elevation, the alpine belt hosts small stature plants that vary greatly in morphology, anatomy and physiology. In…
View article: Biogeographic implications of plant stature and microclimate in cold regions
Biogeographic implications of plant stature and microclimate in cold regions Open
View article: Four ways to define the growing season
Four ways to define the growing season Open
What is addressed as growing season in terrestrial ecosystems is one of the main determinants of annual plant biomass production globally. However, there is no well‐defined concept behind. Here, we show different facets of what might be te…
View article: Not every high‐latitude or high‐elevation forest edge is a treeline
Not every high‐latitude or high‐elevation forest edge is a treeline Open
Attempts at identifying climate warming effects on mountain and arctic vegetation caused a recent hype in treeline studies. In this perspectives article, we recall the need of clear‐cut definitions, a consistent terminology and a theoretic…
View article: Climate and roots, not hyphal development, influence carbohydrate sharing from broad-leaved trees to ectomycorrhizal fungi under elevated CO2
Climate and roots, not hyphal development, influence carbohydrate sharing from broad-leaved trees to ectomycorrhizal fungi under elevated CO2 Open
Background To assess the extent of belowground carbon transfer to ectomycorrhizal fungi in natural forests, we used δ13C and loge C/N measurements to calculate spatial dynamics of carbon movement into ectomycorrhizal …
View article: Chronic in situ tissue cooling does not reduce lignification at the Swiss treeline but enhances the risk of ‘blue’ frost rings
Chronic in situ tissue cooling does not reduce lignification at the Swiss treeline but enhances the risk of ‘blue’ frost rings Open
In their 2013 paper, Lenz et al. illustrated how trees growing at the low-temperature limit respond to a chronic in situ warming or cooling by 3 K, by employing Peltier-thermostated branch collars that tracked ambient temperatures. The mic…
View article: Networking the forest infrastructure towards near real-time monitoring – A white paper
Networking the forest infrastructure towards near real-time monitoring – A white paper Open
Forests account for nearly 90 % of the world's terrestrial biomass in the form of carbon and they support 80 % of the global biodiversity. To understand the underlying forest dynamics, we need a long-term but also relatively high-frequency…
View article: Tracing the Spatial Extent and Lag Time of Carbon Transfer from Picea Abies to Ectomycorrhizal Fungi in the Swiss Forest Face Experiment
Tracing the Spatial Extent and Lag Time of Carbon Transfer from Picea Abies to Ectomycorrhizal Fungi in the Swiss Forest Face Experiment Open
View article: A global framework of mountain ecology
A global framework of mountain ecology Open
In this contribution, I will summarize a number of features of mountain ecosystems that apply globally. After providing a brief statement on mountain definitions and some mountain statistics, I will recall the major climatic and atmospheri…
View article: Less pronounced drought responses in ring-porous than in diffuse-porous temperate tree species
Less pronounced drought responses in ring-porous than in diffuse-porous temperate tree species Open
View article: Tracing the timing and spatial extent of carbon transfer from Picea abies to ectomycorrhizal fungi under elevated CO2
Tracing the timing and spatial extent of carbon transfer from Picea abies to ectomycorrhizal fungi under elevated CO2 Open
Background . The spatial extent and timing of carbon fluxes from mature trees to ectomycorrhizal fungi associated with different hosts is challenging to assess in natural forests but could provide insights into carbon dynamics of fungi dif…
View article: Rising slopes—Bibliometrics of mountain research 1900–2019
Rising slopes—Bibliometrics of mountain research 1900–2019 Open
Mountain areas provide essential resources for a significant proportion of the Earth’s population. This study presents the development of mountain research between 1900 and 2019 based on peer-reviewed articles in English listed in Web of S…
View article: Warming does not delay the start of autumnal leaf coloration but slows its progress rate
Warming does not delay the start of autumnal leaf coloration but slows its progress rate Open
Aim Initiation of autumnal leaf senescence is crucial for plant overwintering and ecosystem dynamics. Previous studies have focused on the advanced stages of autumnal leaf senescence and reported that climatic warming delayed senescence, d…
View article: A hierarchical inventory of the world’s mountains for global comparative mountain science
A hierarchical inventory of the world’s mountains for global comparative mountain science Open
A standardized delineation of the world’s mountains has many applications in research, education, and the science-policy interface. Here we provide a new inventory of 8616 mountain ranges developed under the auspices of the Global Mountain…
View article: The Spatial Extent of Carbohydrate Sharing in the Wood-Wide Web Varies with Climate and with Taxonomy of Ectomycorrhizal Fungi : Insights from the Swiss Forest FACE
The Spatial Extent of Carbohydrate Sharing in the Wood-Wide Web Varies with Climate and with Taxonomy of Ectomycorrhizal Fungi : Insights from the Swiss Forest FACE Open
<p>∙ To assess how belowground mycorrhizal networks may share resources, we used δ<sup>13</sup>C, δ<sup>15</sup>N, and C/N measurements to calculate spatial and temporal dynamics of…
View article: Warming does not delay the start of autumnal leaf coloration but slows its progress rate
Warming does not delay the start of autumnal leaf coloration but slows its progress rate Open
Aim: Initiation of autumnal leaf senescence is critical for plant overwintering and ecosystem dynamics. Previous studies focused solely on the advanced stages of autumnal leaf senescence and claimed that climatic warming delays senescence,…
View article: Limits and Strengths of Tree-Ring Stable Isotopes
Limits and Strengths of Tree-Ring Stable Isotopes Open
This chapter aims at summarizing strengths and caveats on the suitability of stable carbon and oxygen isotopes in tree rings as recorders for fingerprints of environmental influences. First, environmental constraints limiting tree growth a…