The High–Low Arctic boundary: How is it determined and where is it located?

作者：Ksenia Ermokhina, Anna Terskaia, Tatiana Ivleva, Sergey V. Dudov, Vitalii Zemlianskii, Michael Yu. Telyatnikov, Olga Khitun, Elena Troeva, Natalia Koroleva, Svetlana Yu. Abdulmanova · 发表于：Ecology and Evolution · 年份：2023 · DOI：10.1002/ece3.10545 · 被引用次数：13 · 研究领域：Species Distribution and Climate Change、Climate change and permafrost、Geology and Paleoclimatology Research

Geobotanical subdivision of landcover is a baseline for many studies. The High-Low Arctic boundary is considered to be of fundamental natural importance. The wide application of different delimitation schemes in various ecological studies and climatic scenarios raises the following questions: (i) What are the common criteria to define the High and Low Arctic? (ii) Could human impact significantly change the distribution of the delimitation criteria? (iii) Is the widely accepted temperature criterion still relevant given ongoing climate change? and (iv) Could we locate the High-Low Arctic boundary by mapping these criteria derived from modern open remote sensing and climatic data? Researchers rely on common criteria for geobotanical delimitation of the Arctic. Unified circumpolar criteria are based on the structure of vegetation cover and climate, while regional specifics are reflected in the floral composition. However, the published delimitation schemes vary greatly. The disagreement in the location of geobotanical boundaries across the studies manifests in poorly comparable results. While maintaining the common principles of geobotanical subdivision, we derived the boundary between the High and Low Arctic using the most up-to-date field data and modern techniques: species distribution modeling, radar, thermal and optical satellite imagery processing, and climatic data analysis. The position of the High-Low Arctic boundary in Western Siberia was clarified and mapped. The new...