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Changes in Arctic vegetation can have important implications for trophic interactions and ecosystem functioning leading to climate feedbacks. Plot-based vegetation surveys provide detailed insight into vegetation changes at sites around the Arctic and improve our ability to predict the impacts of environmental change on tundra ecosystems. Here, we review studies of changes in plant community composition and phenology from both long-term monitoring and warming experiments in Arctic environments. We find that Arctic plant communities and species are generally sensitive to warming, but trends over a period of time are heterogeneous and complex and do not always mirror expectations based on responses to experimental manipulations. Our findings highlight the need for more geographically widespread, integrated, and comprehensive monitoring efforts that can better resolve the interacting effects of warming and other local and regional ecological factors.
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http://dx.doi.org/10.1007/s13280-019-01161-6 | DOI Listing |
New Phytol
September 2025
Environment and Natural Resources Institute, University of Alaska Anchorage, Anchorage, AK, 99508, USA.
Snow is an important insulator of Arctic soils during winter and may be a source of soil moisture in summer. Changes in snow depth are likely to affect fine root growth and mortality via changes in soil temperature, moisture, and/or nutrient availability, which could alter aboveground growth and reproduction of Arctic vegetation. We explored fine root dynamics at three contrasting treelines in northwest Alaska.
View Article and Find Full Text PDFSci Total Environ
September 2025
Environmental Change Research Unit, Faculty of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65, FI-00014, Finland.
Small lakes are common across the Boreal-Arctic zone. Due to shallowness and high shoreline-surface area ratios, they are abundant in aquatic macrophytes. Vegetated littoral zones have been suggested to count as wetlands when quantifying carbon sinks and sources, but the actual magnitude of aquatic vegetation is seldom quantified.
View Article and Find Full Text PDFMol Ecol
September 2025
Scott Polar Research Institute, University of Cambridge, Cambridge, UK.
The Arctic tundra biome is undergoing rapid shrub expansion ('shrubification') in response to anthropogenic climate change. During the previous ~2.6 million years, glacial cycles caused substantial shifts in Arctic vegetation, leading to changes in species' distributions, abundance and connectivity, which have left lasting impacts on the genetic structure of modern populations.
View Article and Find Full Text PDFEnviron Pollut
August 2025
Institute of Biological and Environmental Sciences, School of Biological Sciences, University of Aberdeen, 23 St. Machar Drive, Cruickshank, Aberdeen, AB24 3UU, UK. Electronic address:
Permafrost wetlands are critical and vulnerable components of northern ecosystems, with their methane (CH) emissions representing a major uncertainty in Earth system models. Previous syntheses have disagreed on how permafrost continuity modulates CH fluxes, leaving a blind spot in climate projections. We hypothesize that degradation of permafrost continuity from continuous to discontinuous to sporadic creates a gradient of environmental conditions that drives an exponential shift in CH emissions.
View Article and Find Full Text PDFSci Total Environ
August 2025
Department of Ecoscience, Aarhus University, DK-8000 Aarhus C, Denmark; Arctic Research Centre, Aarhus University, DK-8000 Aarhus C, Denmark. Electronic address:
Macroalgae are the most widely distributed marine vegetated habitats and contribute to marine carbon cycling and storage but with limited empirical documentation of long-term burial. To evaluate long-term burial of macroalgal-derived carbon in Arctic sediments, we analyzed eDNA from six dated sediment cores from off the coast of West Greenland (79°N-60°N). We applied metabarcoding of 18S rRNA genes to selected sediment layers covering the past ∼2600 years, assessed spatio-temporal patterns of macroalgal taxa, and evaluated climatic drivers of macroalgal change using proxies for past sea surface conditions.
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