Lifespan and mortality of old oaks - combining empirical and modelling approaches to support their management in Southern Sweden

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Bibtex

@article{9ee3227a04bd42159c00ea7d121861d4,
title = "Lifespan and mortality of old oaks - combining empirical and modelling approaches to support their management in Southern Sweden",
abstract = "Old oaks (Quercus robur L.) play an important role in the southern Scandinavian landscape by providing habitat for a wide range of species, a large proportion of them being currently on the National Redlists. To provide support for the management of these trees, we review data on oak mortality and formulate a mortality-driven stochastic model analysing interactions between mortality rate, oak recruitment rate into 100-150 age class, and amount of oaks older than 200 years. Empirical annual mortality rates varied between 0 and 13{\%} with average 1.68{\%}. Trees older 200 years had an average mortality rate of 1.1{\%}. Oaks in the high density forests showed higher mortality (3.2{\%}) as compared to the trees growing in the low density forests (1.2{\%}). A 400-year long modelling exercises indicated that under current mortality rates (regular mortality being centred around 1{\%} annually; and irregular mortality 7{\%} with average return time of 13 years) the long-term maintenance of 20 trees older than 200 years per ha would require an input rate of 1 to 5 trees x year(-1) x ha(-1) into the 100-150 years old class. The modelling highlighted the importance of initial oak abundance affecting amount of old trees at the end of shorter (100 years) simulation period.",
keywords = "disturbance, dynamics, population, dendrochronology, European hardwoods, conservation",
author = "Igor Drobyshev and Mats Niklasson and Hans Linderson and Kerstin Sonesson and Matts Karlsson and Sven Nilsson and Jan Lanner",
year = "2008",
doi = "10.1051/forest:2008012",
language = "English",
volume = "65",
pages = "401",
journal = "Annals of Forest Science",
issn = "1286-4560",
publisher = "EDP Sciences",
number = "4",

}