Neighborhood interactions influencing tree population dynamics in nonpyrogenous boreal forest in northern Finland

Plant Ecology ◽  
2006 ◽  
Vol 185 (1) ◽  
pp. 135-150 ◽  
Author(s):  
Jiří Doležal ◽  
Miroslav Šrutek ◽  
Toshihiko Hara ◽  
Akihiro Sumida ◽  
Timo Penttilä
Keyword(s):  
Population Dynamics ◽  
Boreal Forest ◽  
Tree Population ◽  
Neighborhood Interactions

Combining probabilistic land-use change and tree population dynamics modelling to simulate responses in mountain forests

2007 ◽  
Vol 209 (2-4) ◽  
pp. 157-168 ◽  
Author(s):  
Sophie Rickebusch ◽  
Mario Gellrich ◽  
Heike Lischke ◽  
Antoine Guisan ◽  
Niklaus E. Zimmermann
Keyword(s):  
Land Use ◽  
Population Dynamics ◽  
Land Use Change ◽  
Mountain Forests ◽  
Tree Population ◽  
Dynamics Modelling

Tree population dynamics in Kibale National Park, Uganda 1975-1998

2000 ◽  
Vol 38 (3) ◽  
pp. 238-247 ◽  
Author(s):  
Jeremiah S. Lwanga ◽  
Thomas M. Butynski ◽  
Thomas T. Struhsaker
Keyword(s):  
Population Dynamics ◽  
National Park ◽  
Kibale National Park ◽  
Tree Population

Tree Population Dynamics in Seven South Carolina Mixed-Species Forests

1994 ◽  
Vol 121 (4) ◽  
pp. 360 ◽  
Author(s):  
Robert H. Jones ◽  
Rebecca R. Sharitz ◽  
Susanne M. James ◽  
Philip M. Dixon
Keyword(s):  
Population Dynamics ◽  
South Carolina ◽  
Mixed Species ◽  
Tree Population

scholarly journals Deer game, a key factor affecting population of European yew in beech forests of the Veľká Fatra Mts, Slovakia

2018 ◽  
Vol 45 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Denisa Sedmáková ◽  
Mariana Kýpeťová ◽  
Milan Saniga ◽  
Ján Pittner ◽  
Jaroslav Vencurik ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Driving Factor ◽  
Taxus Baccata ◽  
Beech Forests ◽  
Single Tree ◽  
Negative Factor ◽  
Tree Population ◽  
Key Factor ◽  
European Yew ◽  
Bark Peeling

Abstract Browsing and bark peeling by ungulates is known to affect biodiversity and may constitute the main driving factor of single tree population dynamics. In Slovakia, European yew (Taxus baccata L.) is a threatened species protected by law and present in many protected areas. In the study, we emphasize that protecting land and individual plants may not be sufficient for maintaining of yew populations, unless controlling over damage by deer game is also undertaken. Our results show that in beech forests of the Veľká Fatra Mts, browsing and bark peeling constitute the main negative factor affecting yew seedling-sapling ingrowth transition, and the mortality and vitality loss of adult yew trees. We argue that ungulates may have a larger effect on biodiversity conservation than currently realized.

Mammalian Herbivore Population Dynamics in the Alaskan Boreal Forest

2006 ◽  
Author(s):  
Eric Rexstad ◽  
Knut Kielland
Keyword(s):  
Population Dynamics ◽  
Boreal Forest ◽  
Boreal Forests ◽  
Oral Tradition ◽  
Detectable Effect ◽  
Red Squirrels ◽  
Resource Dynamics ◽  
Mammalian Herbivore ◽  
Moose Hunting ◽  
Predator Pit

The population dynamics of boreal mammals differ strikingly from those of mammals in temperate and tropical ecosystems in their extraordinary fluctuations in abundance (Elton 1924). These fluctuations lead to strong top-down direct effects in which herbivores reduce the biomass of their preferred foods, such as birch and willow, and predators reduce the biomass of herbivores (Chapter 13; Sinclair et al. 2000). These effects are clearly demonstrated in experiments that exclude herbivores or their predators. Some authors have argued that bottom-up influences of food supply on herbivores are negligible because food augmentation to herbivores in the presence of predators had no detectable effect in reducing herbivore decline (Sinclair et al. 2001). Several members of the mammalian herbivore guild are also important as a human subsistence resource. Dynamics of moose (Alces alces) and snowshoe hare (Lepus americanus) can be altered by human harvest. Overexploitation by humans may reduce moose populations to densities where they can be predator-limited—the so-called predator pit (Messier 1994). In this chapter, we present information on dynamics of some mammalian herbivores in the Alaskan boreal forest and potential drivers that are responsible for these dynamics. We omit discussions of the dynamics of porcupines (Keith and Cary 1991), red squirrels (Boonstra et al. 2001a), and beavers (Donkor and Fryxell 1999), as studies of these species have not been conducted in Alaska’s boreal forests. Moose are thought to have arrived in Alaska during the Illinoian glaciation, about 400,000 yr B.P. (Pewe and Hopkins 1967). They may have retreated to refugia in central Alaska during subsequent glacial advances (Peterson 1955) and expanded at times when climate was warmer. Moose populations in North America have more than doubled over the past 30–40 years, to approximately 890,000 animals (Kelsall 1987). The Koyukuk River drainage in the northern interior, for example, is presently known for its large moose populations. However, the oral tradition of moose hunting in the Koyukuk is relatively recent. Native elders recall that, in their youth, moose were extremely rare and that moose did not figure prominently in the local subsistence economy until the 1930s.

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