The Effect of Climatic Factors on the Seasonal Development of Coniferous Forest-Forming Species in the Taiga Zone (Karelia)
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2020, Vol 11, Issue 3
Abstract
Observations over the seasonal development of Scots pine (Pinus sylvestris L.), Siberian spruce (Picea obovata Ledeb.), Norway spruce (Picea abies (L.) Karst.) and Siberian larch (Larix sibirica Ledeb.) had been carried out for 15 years in South Karelia (taiga middle subzone). Phenological observations were taken after every 2-3 days. We recorded the time of such phenophases as swelling and bursting of vegetative buds, beginning and ending of shoot growth, isolation of wintering buds on the shoots, blooming, completion of growth, flowering and defoliation, corking of shoots. The research purpose is to study the similarities and differences in the seasonal development of the forest-forming species of Karelia affected by the main climatic factors. In order to establish the desired correlation we used methods of elementary statistics, correlation and regression analyzes. It was found that the starting dates of the majority of phenophases in the studied species largely depend on air temperature, and to a lesser extent on humidity, precipitation and solar radiation. The relationship between the starting dates of phenophases and the studied climatic factors is straightforward, and its strength depends on the biology of species and specificity of the phenophase itself. Features of development of conifers are largely determined by the state of the environment not only of the current year, but also the previous one. The increase in temperature and humidity, as well as in solar radiation in July of the previous year, significantly accelerate the phenological development of trees of the species studied. The studied species can be arranged according to the degree of resistance to climatic conditions of the taiga zone in the following order: Picea abies, Picea obovata, Pinus sylvestris, and Larix sibirica. It has been found that during the seasonal development Larix sibirica is the least demanding of air temperature, and the most demanding is Picea abies.
Authors and Affiliations
I. T. Kishchenko
Keywords
Related Articles
- EP ID EP683372
- DOI 10.37482/0536-1036-2020-3-72-82
- Views 284
- Downloads 0
Substantiation of the Technological Process Parameters of Wood Skidding with a Mini Tractor in Increment Thinning
The paper considers the method of the mini tractor moving when skidding timber harvested during increment thinning. We analyzed the stand’s horizontal structure formed as a result of intraspecific competition, as well as...
Growth of Vegetative Organs of Picea abies (L.) Karst. in Anthropogenic Environment
The studies were carried out in stands of various degree of devastation: in the city, suburban forests and forests of the green zone. Recreational loads strongly affect the sanitary condition of spruce forests. The numbe...
Needle-Like Leaf Organs of Conifers. Part II. Modeling the Needle Surface Area
In ecological and physiological studies of plant cover, the predominant participation of leaves in the processes of photosynthesis, transpiration and respiration determines the key role of such a morphometric parameter a...
Seasonal Growth of Scots Pine under the Conditions of Water-Logged Soils of the North
The seasonal rhythm of height growth of young shoots of Scots pine growing in a 33-year-old shrubby-sphagnum pine forest of the northern taiga natural-climatic zone has been studied in a complex with the main physiologic...
Biological Activity of Mountain Soils of the Western Caucasus after Deforestation
A study of a set of indicators characterizing the ecological state of forest soils in the mountains of the North-Western Caucasus under broad-leaved and mixed forests has been conducted. The aim of the study has been to...