نتایج جستجو برای: uneven aged stands

تعداد نتایج: 225767  

1997
Alan Vyse Chris Hollstedt David Huggard Linda Bedard

Uneven-aged interior Douglas-fir stand structure and dynamics are complexas a result of irregular fire history, insect and disease outbreaks, and variousforms of partial harvesting and range use. Stocking, crown closure, canopylayering, size-age relationships, and spatial distribution are highly variablefrom one stand to another and within any one stand. Many different factors<l...

Journal: :Forestry 2023

Abstract We investigated how thinning intensity and rotation length affect radiative forcing, thus climate warming or cooling, through changes in albedo carbon stocks Norway spruce (Picea abies Kart. (L.)) stands. Forest ecosystem model simulations were conducted under the current on sub-mesic sites central Finland (62oN). Even-aged management regime with a business-as-usual (baseline) from bel...

Journal: :Forests 2023

The age, size and morphology of trees, including crown dimensions, can influence defoliation. In Croatia, the selection management silver fir (Abies alba Mill.) forests involves pure or mixed stands, either which be affected by various disturbances, resulting in unbalanced stand structures. aim this study was to estimate probability trees transitioning from one defoliation class next, examine t...

2015
Ola Sallnäs Ambros Berger Minna Räty Rodney J. Keenan Eric J. Jokela

In this paper a new concept for modeling uneven-aged forests (UEAF) is presented. The term UEAF in this article encloses all forests that deviate from the even-aged structure. The matrix model is area-based, in that the forest under study is described by a distribution of areas over fixed state-spaces spanned by stem number and volume per hectare classes. Dynamics is introduced as transitions o...

Journal: :Mycologia 2006
Daniel L Lindner Harold H Burdsall Glen R Stanosz

Effects of forest management on fungal diversity were investigated by sampling fruit bodies of polyporoid and corticioid fungi in forest stands that have different management histories. Fruit bodies were sampled in 15 northern hardwood stands in northern Wisconsin and the upper peninsula of Michigan. Sampling was conducted in five old-growth stands, five uneven-age stands, three even-age unthin...

Journal: :Metsanduslikud Uurimused 2022

Abstract During land unsoldering in Ukraine, so-called “self-seeded forests” appeared on lands that had not been used for agriculture a long time. The purpose of the research is to find out erosion control properties self-seeded forests. Twelve locations natural regeneration various types woody plants ravine-gully system Cherkasy region were chosen as sites. Self-seeded woods have structure dif...

2017
Jacob S. Ivan Tanya M. Shenk JACOB S. IVAN

Information regarding the diet of Canada lynx (Lynx canadensis) at the southernmost extent of its range is critical for managing the species under current and predicted climate conditions. Therefore, from 1999–2009, we investigated winter diet and hunting strategies of Canada lynx in Colorado, USA by tracking individuals in the snow to identify sites where lynx encountered and killed prey. Simi...

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