20.500.12556/RUL-130309 Multi-decade tree mortality in temperate old-growth forests of Europe and North America non-equilibrial dynamics and species-individualistic response to disturbance Aim: Old-growth, mesic temperate forests are often assumed to be structured by gap-phase processes, resulting in quasi-equilibrial long-term dynamics. This assumption influences management focused on simulation of natural disturbance dynamics and is embedded in most models of forest successional dynamics. We use multi-decade monitoring of permanent plots in old-growth forests to assess demographic assumptions directly with respect to tree mortality rates. Location: Sixteen sites in mesic, temperate old-growth forests in eastern North America and Europe with multi-decade monitoring. Time period: Variable across sites, spanning c. 20%78 years from 1936 to 2014. Major taxa studied: Tree species of late-successional, cool-temperate forests of Europe and eastern North America. Methods: We calculated and compared the annualized mortality rates (m), with confidence intervals, by species, size class and measurement interval, for tree species of sufficient abundance. Results: Retrospective analysis shows dynamic and diverse demographic properties across populations and sites. Stand-scale mortality rates of 0.7%2.5%/ year average higher than previous estimates for old-growth temperate forests. Variations among species, over time and among size classes, suggest that gap-phase models are inadequate to explain stand dynamics, implying instead that rare disturbance events of moderate severity have long-lasting effects in old-growth forests and that indirect anthropogenic influences affect old-growth, unlogged forests. Main conclusions: Multi-decade baseline data, essential for understanding community assembly and long-term dynamics in these %slow systems,% are rare and poorly integrated. Our analysis demonstrates the value of the few long-term, %legacy% data sets. Results suggest that differences in life history interact with complex disturbance histories, resulting in non-equilibrial dynamics in old-growth temperate tree communities, and that changes in disturbance patterns through anthropogenic climate change might, there%fore, be an important driver of ecosystem change. long-term studies old-growth forest permanent plots temperate forest tree mortality rates dolgoročne študije pragozdovi raziskovalne ploskve stopnja umrljivosti dreves true false true Angleški jezik Slovenski jezik Neznano 2021-09-13 13:02:11 2021-09-13 13:02:13 2022-09-09 04:15:49 0000-00-00 00:00:00 2021 0 0 Str. 1311-1333 iss. 6 Vol. 30 2021 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 2019-02-22 2021-01-26 2021-04-19 2022-04-19 630*1 1466-8238 10.1111/geb.13291 62542083 https://doi.org/10.1111/geb.13291 1 cd6ef552-1481-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=147388 RAZ_Woods_Kerry_D._2021.pdf RAZ_Woods_Kerry_D._2021.pdf 1 EBBCBBCDF0E331DBA3FF7C194715736C 496f71aaa7ac73d061097b3dce8df234554ddc24f6f1a237c0d0c95c859bec92 ba2e8285-1484-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=147391 Biotehniška fakulteta 0 0 0