Cited by STOCHASTIC SIMULATION OF SELF-THINNING

STOCHASTIC SIMULATION OF SELF-THINNING DOI

International Multidisciplinary Scientific GeoConference SGEM ..., Journal Year: 2024, Volume and Issue: 24, P. 393 - 400

Published: Nov. 1, 2024

Understanding the principles of self-thinning forest ecosystems is essential for taking modern management techniques into practice. The spatial distribution surviving trees in a stand influenced by variety factors, including tree mortality. In young forests, competition has major role determining mortality; older random changes environment have role. dynamics number living and dead forests central Lithuania will be addressed this study. Gompertz type mixed effect parameters univariate stochastic differential equations diameter, height, occupied area combined with normal copula function are used to derive new models per ha trees. mean values size variables had much lower trajectories, which especially apparent mature stands, as demonstrated study individual (height diameter). results illustrated using experimental field studies carried out Lithuania, municipality Kazlu Ruda. following information was gathered 48 permanent test plots placed mixed-species, uneven-aged stands: age, diameter at breast height (58,829 trees), position (10,796 trees). All were implemented symbolic algebra system Maple.

Language: Английский

Diffusion Mechanisms for Both Living and Dying Trees Across 37 Years in a Forest Stand in Lithuania’s Kazlų Rūda Region DOI

Edmundas Petrauskas,

Petras Rupšys

Symmetry, Journal Year: 2025, Volume and Issue: 17(2), P. 213 - 213

Published: Jan. 31, 2025

This study aimed to examine changes in the number of live and dying trees central Lithuanian forests over time. Results were obtained using stochastic differential equations combined with normal copula function. The examination each tree’s individual size variables (height diameter) showed that mean values dead or trees’ had significantly lower trajectories particularly pronounced mature stands. According data set under examination, tree mortality rate gradually declined age, reaching approximately 7% after 10 years. Birch 60–70 years old first species reach 1% rate, followed by spruce 70–80 pine 80–90 old. Maple symbolic algebra system was used implement all results.

Language: Английский

Citations

Compatible basal area models for live and dying trees using diffusion processes DOI