Article
Plant Sciences
Kevin L. Griffin, Zoe M. Griffin, Stephanie C. Schmiege, Sarah G. Bruner, Natalie T. Boelman, Lee A. Vierling, Jan U. H. Eitel
Summary: The study found that the respiration of white spruce is lower at the southern range than at the northern range, and the upper canopy leaves have a stronger temperature response than the lower canopy leaves.
PLANT CELL AND ENVIRONMENT
(2022)
Article
Biochemistry & Molecular Biology
Lea-Rebekka Tonjer, Ella Thoen, Luis Morgado, Synnove Botnen, Sunil Mundra, Line Nybakken, Anders Bryn, Havard Kauserud
Summary: Climate change is causing forest lines to shift higher globally, impacting soil biota and carbon sequestration. Analysis of soil biota composition across the forest line ecotone revealed significant differences in fungal and micro-eukaryotic populations. Ectomycorrhizal and saprotrophic fungi dominate below the forest line, while root-associated ascomycetes are more prevalent above it. Ergosterol and soil carbon content strongly correlated with root-associated ascomycetes abundance, suggesting potential implications for carbon turnover and sequestration.
Article
Plant Sciences
Luigi Saulino, Angelo Rita, Marina Allegrezza, Maurizio Zotti, Valentina Mogavero, Giulio Tesei, Silvia Montecchiari, Emilia Allevato, Marco Borghetti, Giuliano Bonanomi, Antonio Saracino
Summary: Past anthropogenic disturbances have decreased the altitude of Mediterranean Fagus sylvatica forests. This study focuses on an unmanaged relic subalpine F. sylvatica stand in southern Apennines, Italy, which is at the highest species range elevation limit and represents an important glacial refugium. The subalpine F. sylvatica stand shows unique tree biometric attributes and understory species assemblage, suggesting the value of its inclusion in priority areas networks for long-term management strategies.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Kevin L. Griffin, Stephanie C. Schmiege, Sarah G. Bruner, Natalie T. Boelman, Lee A. Vierling, Jan U. H. Eitel
Summary: The study found that white spruce saplings at the Arctic treeline have significantly higher respiration rates compared to trees, imposing a carbon cost that may hinder their growth beyond the treeline. Without thermal acclimation, leaf respiration rates could increase by 57% by the end of the century, posing further challenges to the ecology of this ecotone.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Microbiology
Miguel A. Redondo, Jonas Oliva, Malin Elfstrand, Johanna Boberg, Hernan D. Capador-Barreto, Bo Karlsson, Anna Berlin
Summary: This study investigated the factors influencing the composition of fungi on Norway spruce needles, finding that host genotype and the composition of local air spore communities are the main drivers.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Environmental Sciences
Melanie Zacharias, Timo Pampuch, Katrin Heer, Camilla Avanzi, David G. Wuerth, Mario Trouillier, Manuela Bog, Martin Wilmking, Martin Schnittler
Summary: The study revealed high genetic diversity and gene flow in white spruce populations in Alaska, with low genetic differentiation between sites driven mainly by geographic distances. Microenvironmental factors had a greater impact on growth performance than genetic similarity among individuals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Lifeng Wang, Yamei Chen, Yu Zhou, Haifeng Zheng, Zhenfeng Xu, Bo Tan, Chengming You, Li Zhang, Han Li, Li Guo, Lixia Wang, Youyou Huang, Jian Zhang, Yang Liu
Summary: The study revealed that litter chemistry, nutrients, and stoichiometry play a vital role in litter quality degradation and release of carbon fractions. Differences in litter chemistry among different vegetation types lead to variations in litter removal rates, indicating the influence of vegetation type on litter decomposition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Ritwika Mukhopadhyay, Erik Naesset, Terje Gobakken, Ida Marielle Mienna, Jaime Candelas Bielza, Gunnar Austrheim, Henrik Jan Persson, Hans Ole orka, Bjorn-Eirik Roald, Ole Martin Bollandsas
Summary: Due to climate change, treelines are shifting to higher altitudes and latitudes. Accurately estimating the biomass of trees and shrubs in alpine areas is crucial for carbon reporting. This study utilized remotely sensed data, such as airborne laser scanning (ALS) and digital aerial photogrammetry (DAP), to estimate aboveground biomass (AGB) in a treeline ecotone in Southern Norway. Despite weak fit of the prediction models, the estimates showed adequate precision with relatively narrow confidence intervals (CIs). The results suggest that ALS and DAP data can be effectively used for AGB estimation in treeline ecotones.
Article
Environmental Sciences
Matthew Garcia, Benjamin Zuckerberg, Jalene M. LaMontagne, Philip A. Townsend
Summary: The study aimed to evaluate the feasibility of using multispectral vegetation indexes in combination with ground-based observations to identify mast seeding patterns in coniferous forests. Results showed that moisture-oriented VIs were able to identify mast years to a certain extent.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Plant Sciences
Stephanie C. Schmiege, Kevin L. Griffin, Natalie T. Boelman, Lee A. Vierling, Sarah G. Bruner, Elizabeth Min, Andrew J. Maguire, Johanna Jensen, Jan U. H. Eitel
Summary: Light availability plays a crucial role in vertical canopy gradients. This study found differences in light availability, photosynthetic functioning, and leaf traits between trees at the northern and southern range extremes of white spruce. Unlike many other tree species, high latitude trees may not require vertical gradients to optimize photosynthetic carbon gain. The lower photosynthetic rates and higher respiratory costs could ultimately constrain the northern range limit of this boreal species.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Environmental Sciences
Achyut Tiwari, Arjun Adhikari, Ze-Xin Fan, Shu-Feng Li, Alistair S. Jump, Zhe-Kun Zhou
Summary: Alpine treelines are important indicators of climate change impacts on tree growth and forest distribution. They provide insights into ecosystem responses to shifting temperature and precipitation patterns. Tree rings can reveal growth limitations, and different tree species exhibit varied responses to climate and environmental factors.
REGIONAL ENVIRONMENTAL CHANGE
(2023)
Article
Environmental Sciences
Viacheslav I. Kharuk, Sergei T. Im, Il'ya A. Petrov
Summary: The study examined the growth and movement of birch trees in the Siberian Mountains and found that birch area has increased since 1970, with birch stands and treeline boundary shifting upslope. The upslope climb of birch trees is correlated with temperature during the beginning and end of the growing season, while precipitation does not play a significant role. Wind negatively impacts birch growth and upslope migration, but birch, along with other tree species, form clusters in windy habitats to mitigate the effects of adverse winds.
JOURNAL OF MOUNTAIN SCIENCE
(2021)
Article
Agronomy
Antonio Gazol, J. Julio Camarero, Jose M. Igual, Ester Gonzalez de Andres, Michele Colangelo, Cristina Valeriano
Summary: This study compares tree populations forming the distribution limits of mountain pine in northeastern Spain. The results show that tree growth is influenced by climate and soil properties. There are marked differences in leaf traits and growth response to climate between treeline and rearedge sites. The soil microbiota in treelines is dominated by bacteria, while in forests it is dominated by fungi.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Forestry
Ignacio Barbeito, Bianca N. I. Eskelson, Grace Carsky
Summary: The study found that mixing lodgepole pine and interior hybrid spruce as well as planting at high densities can decrease weevil attacks in spruce, reducing timber quality loss. However, mixing with spruce can lead to decreased quality in lodgepole pine due to larger crowns.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Plant Sciences
Stefan F. Hupperts, Erik A. Lilleskov
Summary: This study reveals that there is a trade-off between symbiont foraging traits and associated carbon costs, which shapes seedling ectomycorrhizal fungal communities in peatlands.