Северный (Арктический) федеральный университет имени М.В.Ломоносова
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Автор: Alekseev
Северный (Арктический) федеральный университет имени М.В. Ломоносова
The Lisino training and experimental forest of the Saint-Petersburg State Forest Technical
University was chosen as a study area. The forest is located in the central part of the
Leningrad region and has a high level of protection as a forest of scientific and historical
value. According to the official data, mean annual temperature in the region increased by
0.6 °C within 10 years as well as precipitation. The impact determination of changing
climate conditions on Norway spruce trees growth was the aim of this study. Three most
representative compartments dominated by Norway spruce (Picea abies (L.) Karst.) were
selected for data collection. Core samples were taken by the Pressler increment borer from
107 dominant trees while climatic data were obtained from the nearest weather stations.
Tree rings were measured and analyzed using WinDendro software while climate data
were processed by Microsoft Excel. Tree ring data cover the time interval from 1848 to
2011, each ring was characterized by width, calendar year, age and diameter of the tree.
Radial growth was analyzed within age and diameter classes. Annual rings widths were
varied from 0.1 to 6 mm. There was a positive trend in age classes of 0-20, 21-40 and
41-60 years old. The growth was very slow in the age classes of 61-80, 81-100 and >100.
Diameters are larger in the age classes of 20-40 and 41-60 as compare to the local diameter
growth table which was developed in the 19th century. Diameters for age classes older than
41-60 years were less than prescribed by the diameter growth table. Annual rings width for
all age classes also demonstrate cyclic dynamics, moreover, the decline in growth sometimes
occurred in recent decades. Multiple regression was used for developing the response
function of growth to changes in climatic conditions. There was revealed a high correlation
(90 %) and low influence of vegetation period climate data on growth during 1848–2011
(0.08102 mm/°C and 0.00085 mm/mm). Likewise, analysis shows that growth is higher
in young and middle-aged than mature and over mature stands. Overall, climate change
impact has a positive effect on the radial growth of Norway spruce for the studied area,
however, not for all age and diameter classes.
For citation: Alekseev A.S., Sharma S.K. Long-Term Growth Trends Analysis of Norway
Spruce Stands in Relation to Possible Climate Change: Case Study of Leningrad Region.
Lesnoy Zhurnal [Russian Forestry Journal], 2020, no. 3, pp. 42–54. DOI: 10.37482/0536-
1036-2020-3-42-54
Долговременные тенденции роста древостоев ели европейской изучались на территории Лисинской части учебно-опытного лесничества Ленинградской области, расположенной в ее центре и имеющей высокий защитный статус ценных лесов, имеющих
научное и историческое значение. По официальным данным среднегодовая температура в районе исследований возросла на 0,6 °C за 10 лет, среднегодовые осадки также
увеличились незначительно. Цель исследований – определение влияния произошедших
изменений климатических показателей на рост деревьев ели европейской (Picea abies
(L.) Karst.). Три наиболее типичных выдела с преобладанием ели европейской были
выбраны для сбора данных о ходе роста древостоев. Образцы древесины отобраны буравом Пресслера у 107 деревьев, метеорологические данные получены по наблюдениям ближайшей метеорологической станции. Радиальный прирост измерен с помощью калиброванного сканера и специализированной программы WinDendro, полученные
результаты совместно с метеорологическими данными обработаны в программе Excel.
Данные о радиальном приросте модельных деревьев покрывают интервал с 1848 по
2011 г., каждый годичный слой характеризовался календарным годом образования, шириной, возрастом и диаметром дерева. Радиальный прирост деревьев анализировался
по классам возраста и ступеням толщины. Ширина годичных колец варьировала от 0,1
до 6 мм. Выявлены положительные тренды радиального прироста для классов возраста
0-20, 21-40 и 41-60 лет. Для классов возраста 61-80, 81-100 и более 100 лет положительные изменения радиального прироста оказались недостоверны. Анализ хода роста
деревьев по диаметру путем сравнения с местными таблицами хода роста показал больший диаметр для классов возраста 21-40 и 41-60 лет, для остальных классов возраста
он оказался меньше указанного в таблицах. Радиальный прирост для всех классов возраста продемонстрировал наличие циклической динамики изменений, причем падение
прироста иногда приходилось на последние десятилетия. Для построения функции отклика прироста на изменение климатических условий был использован множественный регрессионный анализ. С высокой степенью достоверности (90 %) установлено
слабое влияние температуры и количества осадков за вегетационный сезон на радиальный прирост деревьев с 1848 по 2011 г. (0,08102 мм/°С и 0,00085 мм/мм). Кроме того,
анализ показал более сильную реакцию радиального прироста на изменения климатических условий у молодых и средневозрастных древостоев по сравнению со спелыми
и перестойными. В целом изменения климатических условий имеют положительное
влияние на радиальный прирост, но не для всех классов возраста и ступеней толщины.
Для цитирования: Alekseev A.S., Sharma S.K. Long-Term Growth Trends Analysis of
Norway Spruce Stands in Relation to Possible Climate Change: Case Study of Leningrad
Region // Изв. вузов. Лесн. журн. 2020. № 3. С. 42–54. DOI: 10.37482/0536-1036-2020-
3-42-54
Автор: Potapov
This article is devoted to an investigation of the local fauna of bumblebees in the lower reaches of the Northern Dvina River in northern Russia where 27 species of bumblebees were found during the present study. The basis of the local fauna of bumblebees in the lower reaches of the Northern Dvina River is related to species with a wide range. The majority of the species are Transpalaearctic. Holarctic, Sub-Transpalaearctic, whereas West-Central Palaearctic are less represented. According to the latitudinal aspect the majority of the species are temperate, and the rest are boreal and arcto-temperate. One of species found in the local fauna is subboreal. The number of species in the studied local fauna is the largest among the local faunae of the northern part of the Arkhangelsk Region. It is comparable to the local faunae of the southern part of this region. Here is recorded species such as Bombus soroeensis, B. distinguedus, B. ruderarius, B. veteranus, B. humilis, and others, which are not typical of native taiga habitats but are the meadow species in the European North of Russia. Due to the wide development of meadows and ruderal communities in the lower reaches of the Northern Dvina River, these species are widely represented here. The rare species in the studied local fauna are B. patagiatus, B. humilis, B. consobrinus, and B. schrencki.
Автор: Potapov
This article presents the results of research focussed on the local bumblebee fauna in the southwest of the Kola Peninsula
(near the town of Kandalaksha). In general, if we include the published data, the local fauna have 16 species of bumblebees.
Among the species of the present study, the recent record for this region is Bombus wurflenii Radoszkowski,
1860. This species was previously unknown in the European North of Russia. It is typical for mountain ecosystems in
Europe (Scandinavia, the mountains of Central and Western Europe, the Balkans, Northern Turkey and the Caucasus).
We assume that the record of B. wurflenii on the Kola Peninsula is the recent appearance of this species in the region.
One of the possible reasons for the expansion of this species is climate change. Other species of bumblebees in the local
fauna are typical for the region. The species present wide ranges, i.e., Transpalaearctic, Holarctic and one species of
West-Central Palaearctic. In the outskirts of Kandalaksha, there are 2 species (B. distinguendus Morawitz, 1869 and B.
veteranus (Fabricius, 1793)) which belong to the group of meadow species according to their habitat preference. They
are not common for the taiga habitats in the European North of Russia. We can explain