Essays about: "Betula"

Showing result 21 - 25 of 102 essays containing the word Betula.

1. 21. The intraspecific drought tolerance of Betula pendula Roth. : ecotypic aptitude as tree selection criteria for the urban landscape

   University essay from SLU/Dept. of Plant Breeding (from 130101)

   Author : Simon Hannus; [2021]
   Keywords : Betula pendula; clinal variation; drought tolerance; ecosystem services; ecotypes; potential evapotranspiration; turgor loss point; urban forestry; urban resilience; urban tree selection;

   Abstract : The ecosystem services provided by urban trees are substantial contributors to the quality of urban living, and their environmentally regulating capabilities are increasingly regarded as integral in order to efficiently secure urban resilience, by ameliorating the human and material impacts of extreme weather events. However, current trends of urban development presents challenges of how to preserve urban greenery ecosystem functioning, particularly in light of the ongoing climate change; which also has brought forth the importance of taxonomically diverse urban forests, to mitigate risks of catastrophic tree loss associated with these conditions. READ MORE

3. 22. Growth and management of Silver birch and Hybrid aspen in southern Sweden

   University essay from SLU/Southern Swedish Forest Research Centre

   Author : Mari Tuvikene; [2021]
   Keywords : Betula pendula Roth; ; Populus × wettsteinii Hämet-Ahti = P. tremula L. × P. tremuloides Michx.; ; plantation; young stand; simulation; fertilization;

   Abstract : Nowadays, the changing climate and the risks associated with it urge us to re-evaluate our silvicultural practices. Due to the increasing demand for wood and good economy amongst other factors, Swedish forest landscape is dominated by two species – Norway spruce Picea abies (L.) Karst. and Scots pine Pinus sylvestris (L. READ MORE

4. 23. Poplar for biodiversity? : comparison of lichen communities in stands of Balsam poplar, Hybrid larch, Silver birch and Norway spruce

   University essay from SLU/Southern Swedish Forest Research Centre

   Author : Ewa Zuzanna Jastrzebska; [2020]
   Keywords : Poplar; Populus trichocarpa; lichen; biodiversity; epiphytic lichen; Norway spruce; Hybrid larch; Silver birch; Sweden;

   Abstract : Due to increasing interest in the use of non-native tree species, more knowledge is needed concerning their effects on biodiversity. In this context, epiphytic lichens were investigated in two stands of non-native tree species (Larix×eurolepis and Populus trichocarpa) and two stands of native tree species (Picea abies and Betula pendula) in a field experiment in southern Sweden. READ MORE

5. 24. Produktionsjämförelse av genetiskt förädlad vårtbjörk med finskt och svenskt ursprung

   University essay from SLU/Dept. of Forest Ecology and Management

   Author : Pelle Eriksson; Carl Åhlund; [2020]
   Keywords : Betula pendula; Finland; plusträd; kvalitet; tillväxt;

   Abstract : Genetisk förädling av ett trädslag innebär förbättring av tillväxtegenskaper och förbättring av kvalitén, det kan även leda till bättre anpassning till miljön vilket är viktigt då klimatet ändras. I Sverige har förädlingen av barrträd lett till högre avkastning av skogsproduktion, men för björk finns endast förädlat material från ett första generationens plantage i södra Sverige. READ MORE

6. 25. The role of time perspective in the relationship between physical activity and depression

   University essay from Umeå universitet/Institutionen för psykologi

   Author : Joseph Jackson; Pierre Tevström; [2020]
   Keywords : Time perspective; depression; physical activity; betula; Tidsperspektiv; depression; fysisk aktivitet; betula;

   Abstract : The present study aimed to examine the role of time perspective (TP) in the relationship between physical activity (PA) and depression. The sample consisted of 456 older adults (60- 90 years) from the Betula prospective cohort study. READ MORE