30-year cone production dynamics in Siberian stone pine (Pinus sibirica) in the southern boreal zone: a causal interpretation

Горошкевич, С. Н.; Велисевич, С. Н.; Popov, Aleksandr G.; Khutornoy, Oleg V.; Vasilyeva, Galina

doi:10.5091/plecevo.2021.1793

Cited by 5 publications

(2 citation statements)

References 54 publications

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“…Human interference in the development of plant communities disrupts the course of natural selection, therefore, changes the structure of diversity, deforms the genotypic composition of populations, thereby reducing their adaptive potential [3]. Indeed, seed productivity in nearsettlement siberian stone pine forests is significantly higher than in taiga forests [4], but seed quality, on the contrary, is significantly lower [5], which we assume is related to the low level of natural selection in artificial forests.…”

Section: Introductionmentioning

confidence: 78%

Seed yield structure in taiga and sub-settlement Siberian stone pine forests: level, and nature of differences

Velisevich,

Popov,

Goroshkevich

2023

E3S Web of Conf.

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On the example of Siberian stone pine, seed productivity was analysed in two stands that differed in origin and formation conditions. The cone yield was analysed in years with different levels of seed production in the period from 2016 to 2019. In terms of the number of cones per tree, the sub-settlement Siberian stone pine forest was 2-3 times superior to the taiga Siberian stone pine forest. The level of individual variability in the number of cones in the near-settlement Siberian stone pine forest was significantly lower than in the taiga forest. There is reason to believe that the high level of variability is likely related to a more pronounced differentiation of the stand by crown size. The number of dead ovules in the Siberian stone pine forest in settlement is 60-70% higher than in the taiga forest. Due to high “mortality” of ovules and high variability of this trait, the number of filled seeds in the near-settlement Siberian stone pine forest is much lower, and variability in the number of complete seeds is much higher than in taiga Siberian stone pine forest. When there are few filled seeds in a cone, the size of each of them increases. Therefore, the average weight of one filled seed is higher in the subsettlement Siberian stone pine forest than in the taiga forest. Thus, the quality of the cones in the years of average and especially high yield in the near-settlement Siberian stone pine forest is much lower, and the level of variability of the traits that characterise it is much higher, and the distribution of the traits is characterised by a pronounced negative kurtosis. Obviously, these peculiarities of the near-settlement Siberian stone pine forest are related to human interference in the course of its development, which disturbed the course of natural selection and deformed the genotypic composition of the population.

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Section: Introductionmentioning

confidence: 78%

Seed yield structure in taiga and sub-settlement Siberian stone pine forests: level, and nature of differences

Velisevich,

Popov,

Goroshkevich

2023

E3S Web of Conf.

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“…Unfortunately, only individual links in the complex "seed-nutcracker-seedling" chain are addressed in the majority of studies on this topic. For example, there are studies focusing on the dynamics of yield and seed productivity of forest stands [8][9][10][11] or seed dispersal and storage by nutcrackers [12][13]. In some cases, only a general prediction is made as to how these factors affect the subsequent regeneration.…”

Section: Introductionmentioning

confidence: 99%

Regeneration of Pinus sibirica Du Tour as a result of trophic relationships with the thin-billed nutcracker (Nucifraga caryocatactes macrorhynchos Brehm C L)

Tantsyrev,

Ivanova,

Petrova

2023

BIO Web Conf.

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Identifying the patterns of dynamics of natural populations of woody plants at the stage of their renewal is one of the main problems of forest ecology. The reforestation process is determined by both the dynamics of seed production and the specificity of seed dispersal of forest tree species. The five-needled pine renewal the Cembrae subsection with wingless seeds depends on birds of the genus Nucifraga sp., which store and spread their seeds. The aim of this study is to determine the relationship between seed production and regeneration of Pinus sibirica Du Tour using the thin-billed nutcracker (Nucifraga caryocatactes macrorhynchos Brehm C. L.) as a mediator. Long-term studies of these relationships have been carried out in the Siberian pine forests of the North Ural Mountains. As a result, a paradoxical conclusion is made that the number of Nucifraga birds during the period of storing and spreading of seeds in the previous year is a key factor in the abundance of Pinus sibirica seedlings. In turn, the number of seeds, both from the previous year and the current year, affects the number of Nucifraga birds.

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Climate warming disturbances periodicity of Siberian stone pine seed production (Pinus sibirica Du Tour)

Velisevich,

Popov

2024

BIO Web Conf.

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Siberian stone pine is one of the main edificator plants of taiga forests of Western Siberia. Sustainable functioning of forest ecosystems depends on its successful cone crops, as its seeds are the basis for the diet of many forest animals. A cone crop in this species is characterized by pronounced interannual variability, manifested in the formation of high seed yields once in 3-4 years. However, in the last 20 years, high yields have been rare, replaced by years with average and low yields. To establish the reasons for these changes, the dynamics of seeding in the period from 1990 to 2023 and weather conditions in spring in the pollination year during the same period were analyzed. It was found that the number of mature cones in the crown largely depended on spring weather in the year of pollination and was negatively correlated with the sum of active temperatures above +5°C accumulated before the late spring frost. If frost occurred at SAT above 300°C, the following year’s crop was minimized. Analysis of weather conditions showed that, on average, there is a tendency to shift the dates of the last frosts to later dates, and even a short-term decrease in temperature to -1 °C leads to complete death of the future crop of cones. Despite the growth of heat availability in the spring period due to active temperature increase in April, the expected shift of frosts to earlier dates is not observed in the south of Western Siberia. For Siberian stone pine, such situation is fraught with strengthening of negative trend in seeding dynamics. It is supposed that at further climate warming the beginning of spring development of reproductive structures will occur at earlier dates, so reproductive structures will be more damaged by late spring frosts, since the latter remain within the same time frames.

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30-year cone production dynamics in Siberian stone pine (Pinus sibirica) in the southern boreal zone: a causal interpretation

Cited by 5 publications

References 54 publications

Seed yield structure in taiga and sub-settlement Siberian stone pine forests: level, and nature of differences

Seed yield structure in taiga and sub-settlement Siberian stone pine forests: level, and nature of differences

Regeneration of Pinus sibirica Du Tour as a result of trophic relationships with the thin-billed nutcracker (Nucifraga caryocatactes macrorhynchos Brehm C L)

Climate warming disturbances periodicity of Siberian stone pine seed production (Pinus sibirica Du Tour)

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