Invasion of Siberian Pine Populations in Mountain Tundra in the Northern Urals

Sannikov, S. N.; Tantsyrev, N. V.; Петрова, И. В.

doi:10.1134/s1995425518040078

Cited by 7 publications

(2 citation statements)

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“…The problems of biodiversity (Mirkin et al, 2014;Sannikov et al, 2017;Ivanova, 2019) and forest productivity (Usoltsev et al, 2011(Usoltsev et al, , 2019Schepaschenko et al, 2017), ecology of individual species of woody plants ( Kalashnikova & Makhnev, 2013;Maiti et al, 2016;Sannikov et al, 2018), history of vegetation development (Panova & Antipina, 2016), reforestation and stand formation (Tantsyrev & Sannikov, 2008;Menshchikov et al, 2013;Fomin et al, 2015;Zalesova et al, 2019) have been actively discussed in the literature for the Ural Mountains, but our study on the adaptation of forest ecosystem vegetation to different moisture regimes is one of the first for taiga mountain forests in Russia. It has estimated the stability and trends of changing species composition and productivity when changing the moisture regime.…”

Section: Discussionmentioning

confidence: 97%

Influence of soil moisture regime on the species diversity and biomass of the herb layer of pine forests in the Ural Mountains

Ivanova

Zolotova

2020

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Adaptation of plant communities is an important factor for maintaining their functioning and stability in changing conditions. The aim of our research is study of the effect of soil moisture regime on the species richness and biomass of the herb layer for old-growth coniferous forests in the Ural Mountains (Russia). The research has been carried out between 57° 00'N; 60° 15''E and 57° 05'N; 60° 25'E. The studied area is part of the Zauralsky hilly piedmont province, the Southern boreal forest region. Sample plots (0.25 hectares) were laid in pine forests growing in habitats with different moisture regimes: insufficient, optimal (stable), and excessive. The research was conducted in 2010. To determine the herb layer productivity, 10-20 subplots 1x1 m in size were laid on each sample plot. Data analysis is based on the One-way ANOVA and species abundance distributions. It has been established that species richness in extreme (insufficient and excessive soil moisture regime (Cowberry pine forest and Pine forest with shrubs and sphagnum) and optimal (stable) soil moisture regime (Multi-herb pine forest) were found to vary significantly, with soil moisture regime being a statistically significant factor. By contrast, herb layer biomass is maintained fairly stable regardless of the soil moisture regimes. ANOVA showed no significant differences between pine forests growing under different soil moisture regimes. It has been found that biomass is maintained by increasing of the dominant species contribution to the overall biomass and increasing of the approximation function graph slope. At the same time, the parameter β of exponential and power approximating functions is increased and can be considered as an indicator of influencing on forest ecosystems and a measure of their adaptation to insufficient and excessive soil moisture. Thus, species abundance distributions can be used as method to measure the effects of factors that determine forest ecosystem composition and functioning.

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Section: Discussionmentioning

confidence: 97%

Influence of soil moisture regime on the species diversity and biomass of the herb layer of pine forests in the Ural Mountains

Ivanova

Zolotova

2020

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“…In turn, most seeds of the anemochory tree species growing at a distance of up to 1 km are not likely to reach the mountain tundra. Certainly, nutcrackers have always brought Pinus sibirica seeds into the mountain tundra, which is known for the open types of substrate the birds prefer to create food stores [47]. However, the emerging seedlings are likely to not have survived in the previously harsh conditions of the mountain tundra.…”

Section: Discussionmentioning

confidence: 99%

Regeneration of Pinus sibirica Du Tour in the Mountain Tundra of the Northern Urals against the Background of Climate Warming

Ivanova

Tantsyrev

2022

Atmosphere

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Climate is one of the key drivers of the plant community’s structure and trends. However, the regional vegetation-climate features in the ecotone have not yet been sufficiently studied. The aim of the research is to study features of Pinus sibirica Du Tour germination, survival, and growth in the mountain tundra of the Northern Urals against the background of a changing climate. The following research objectives were set: To determine the abundance and age structure of P. sibirica undergrowth on the mountain tundra plateau, identify the features of P. sibirica growth in the mountain tundra, and examine the correlation between the multi-year air temperature pattern, precipitation, and P. sibirica seedling emergence. A detailed study of the Pinus sibirica natural regeneration in the mountain stony shrub-moss-lichen tundra area at an altitude of 1010–1040 m above sea level on the Tri Bugra mountain massif plateau (59°30′ N, 59°15′ E) in the Northern Urals (Russia) has been conducted. The research involved the period between 1965 and 2017. Woody plant undergrowth was considered in 30 plots, 5 × 5 m in size. The first generations were recorded from 1967–1969. The regeneration has become regular since 1978 and its intensity has been increasing since then. Climate warming is driving these processes. Correlation analysis revealed significant relationships between the number of Pinus sibirica seedlings and the minimum temperature in August and September of the current year, the minimum temperatures in May, June, and November of the previous year, the maximum temperatures in May and August of the current year, and precipitation in March of both the current and previous years. However, the young tree growth rate remains low to date (the height at an age of 45–50 years is approximately 114 ± 8.8 cm). At the same time, its open crowns are rare single lateral shoots. The length of the side shoots exceeds its height by 4–5 times, and the length of the lateral roots exceeds its height by 1.2–1.5 times. This is an indicator of the extreme conditions for this tree species. With the current rates of climate warming and the Pinus sibirica tree growth trends, the revealed relationships allow for the prediction that in 20–25 years, the mountain tundra in the studied Northern Urals plateau could develop underground-closed forest communities with a certain forest relationship. The research results are of theoretical importance for clarifying the forest-tundra ecotone concept. From a practical point of view, the revealed relationship can be used to predict the trend in forest ecosystem formation in the mountain forest-tundra ecotone.

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