Micro-site conditions affect Fennoscandian forest growth

0542567 - ÚVGZ 2022 RIV IT eng J - Článek v odborném periodiku
Hartl, C. - Düthorn, E. - Tejedor, E. - Kirchhefer, A. J. - Timonen, M. - Holzkamper, S. - Büntgen, Ulf - Esper, J.
Micro-site conditions affect Fennoscandian forest growth.
Dendrochronologia. Roč. 65, FEB (2021), č. článku 125787. ISSN 1125-7865. E-ISSN 1612-0051
Výzkumná infrastruktura: CzeCOS III - 90123
Institucionální podpora: RVO:86652079
Klíčová slova: central scandinavian mountains * scots pine growth * tree-ring width * summer temperature * density chronologies * climatic influence * reconstruction * variability * sensitivity * tornetrask * Abiotic site factors * Boreal forest growth * Climate sensitivity * Dendroecology * Scots pine * Tree-ring network
Obor OECD: Physical geography
Impakt faktor: 3.071, rok: 2021
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S1125786520301260?via%3Dihub

The long tradition of dendroclimatological studies in Fennoscandia is fostered by the exceptional longevity and temperature sensitivity of tree growth, as well as the existence of well-preserved subfossil wood in shallow lakes and extent peat bogs. Although some of the world's longest ring width and density-based climate reconstructions have been developed in northern Fennoscandia, it is still unclear if differences in micro-site ecology matter, and if so, whether they have been considered sufficiently in previous studies. We developed a Fennoscandia-wide network of 44 Scots pine ring width chronologies from 22 locations between 59 degrees-70 degrees N and 16 degrees-31 degrees E, to assess the effects of moist lakeshores and dry inland micro-sites on tree growth. Our network reveals a strong dependency of pine growth on July temperature, which is also reflected in latitude. Differences in forest productivity between moist and dry micro-sites are likely caused by associated effects on soil temperature. While trees at moist micro-sites at western locations exhibit higher growth rates, this pattern is reversed in the continental eastern part of the network, where increased ring widths are found at drier sites. In addition to the latitudinal increase in growth sensitivity to July temperature, pines at moist sites exhibit an increased dependency of summer warmth. The highest temperature sensitivity and growth coherency, and thus greatest suitability for summer temperature reconstructions, is found in those regions where July mean temperatures range between 11.5 and 13.5 degrees C, and May precipitation totals do not exceed 100 mm. Our study not only provides guidance for the selection of sampling sites for tree ring-based climate reconstructions, but also reveals the effect of micro-site ecology on Fennoscandian forest growth. The manifestation of micro-site effects varies substantially over the Fennoscandian boreal forest and is predominately triggered by the geographical setting of the stand as expressed by differing abiotic site factors.
Trvalý link: http://hdl.handle.net/11104/0319953