Are seed dispersal and seedling establishment distance- and/or density-dependent in naturally regenerating larch patches? A within-patch scale analysis using an eigenvector spatial filtering approach

Im, Changmin; Chung, Junmo; Kim, Hyun Seop; Chung, Sang-Hoon; Yoon, Tae Kyung

doi:10.1016/j.foreco.2022.120763

Cited by 4 publications

(3 citation statements)

References 88 publications

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“…For instance, in pure Norway spruce forests in Switzerland, the small dead trees tend to gather close to large trees, and this aggregation effect decreases as the distance increases (Bianchi et al, 2021). A study of Japanese larch forests revealed that density dependence did not play a role, and the further away seedlings were from the seed tree, the greater their survival rates (Im et al, 2023). However, in tropical mountain rainforests, the densities of saplings and small and medium trees increased and then decreased with the distance from old-growth trees, which exhibited a consistent pattern of density dependence (Miao et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Competition and density dependence in arid mountain forest stands: revealing the complex process from spatial patterns

Yang,

Yu,

Wang

et al. 2024

Front. For. Glob. Change

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Understanding the spatial patterns and interaction of trees is crucial for exploring forest dynamics. However, limited research has explored the spatial pattern and interactions between adult trees and their offspring population in arid mountain forest ecosystems. We investigated the spatial distribution and interaction of recruitment, survival, and mortality at different size classes in the Populus davidiana forest in the Luoshan Mountains (Ningxia, China), to gain insights into its stand dynamics. (1) This demonstrated the characteristic shift from an aggregated to random distribution as seedlings grew and developed into adult trees. (2) The adult trees exhibited strong positive and weak negative spatial associations with seedlings and saplings, respectively, with an increasing spatial scale, yet both stages underwent stark transitions from negative (1–15 m scales) to positive (> 20 m scale) associations. (3) Generally, the closer the individual trees were to each other, the greater the negative impact of neighboring trees on the size of an individual tree. (4) Additionally, adult trees strongly increased the risk of seedling mortality across the spatial scale of 0–50 m. (5) Live seedlings were less than the dead ones around dead seedlings. There was a stronger aggregation of dead seedlings than live seedlings. Moreover, the density-dependent mortality in our study rejected the random mortality hypothesis. In summary, these results suggest that spatial separation occurs between dead and live seedlings of P. davidiana. Under adult trees, negative dependence plays an important role in the arid mountain forest recruitment. Our findings will contribute to the restoration and conservation of arid mountain forests and provide theoretical support for forest management.

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Section: Introductionmentioning

confidence: 99%

Competition and density dependence in arid mountain forest stands: revealing the complex process from spatial patterns

Yang,

Yu,

Wang

et al. 2024

Front. For. Glob. Change

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“…In order to understand how the colonization of abandoned lands contributing to the natural restoration of ecosystems occurs, it is necessary to determine what the main biotic and abiotic constraints are for this process and at what spatial scales they operate [26]. Thus, the colonization of abandoned lands by the birch can be influenced to a certain extent by the frequency of intensive fruiting, the height and number of seedbearing trees, as well as the direction and speed of the wind [6,[27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…The success of natural regeneration depends on complex interactions in the structure of forest stands and on natural processes of seed dispersal and seedling development. In particular, the spatial pattern of seed dispersal, the formation and growth of seedlings, as well as microenvironmental factors, are closely interconnected, thus determining the results of natural regeneration [29]. For a retrospective analysis of the spatial patterns of tree species formation and growth on abandoned agricultural lands, long-term ground observations or multispectral images from different years with a resolution that allows for the visualization of small tree seedlings are required.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Dynamics of Betula pendula Crown Cover on Abandoned Arable Land in a Broad-Leaved Forest Zone of Bashkir Cis-Ural

Fedorov,

Tuktamyshev,

Bikbaev

et al. 2023

Forests

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Silver birch (Betula pendula Roth) is one of the fast-growing tree species that often colonize abandoned agricultural lands in Europe and the European part of Russia. The purpose of this article is to analyze the spatiotemporal dynamics of Betula pendula crown cover on abandoned arable lands in a zone of broad-leaved forests of the Bashkir Cis-Ural (Russia, Republic of Bashkortostan). The assessment of current and retrospective values of crown cover was carried out using a regression model of the dependence of crown cover on the values of red channel brightness in early-spring images from Landsat 5–8 and Sentinel-2 satellites from 2012–2022. To estimate the number and height of trees, a survey was carried out using a LiDAR camera mounted on a UAV. After calculating the crown cover in grid squares and their distance from the seed source in QGIS, variance analysis was carried out to assess the influence of the factor of distance from the seed source on the crown cover. The influence of the factor of distance from the seed source on the crown cover was higher at earlier stages of overgrowth of abandoned agricultural lands. An exception to this dependence was only one sample plot where the prevailing wind direction was opposite to the direction of seed dispersal. The leading factors affecting the distribution of birch on abandoned agricultural lands were wind direction, height of seed trees, and grazing. In the parts of the sample plots that were furthest away from seed sources, the trees were 1–3 years younger or the same age, and stand density was lower than in sites located closer to the seed trees. In general, the results of the present study indicate two opposite relationships between seedling survival and distance to seed trees: (1) seed fall and seedling density decrease with increasing distance from the seed tree, and (2) the probability of seed/seedling survival increases due to decreased competition.

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Scenario simulation in decision-making optimization: lessons from social coppice forests

Zandebasiri,

Jahanbazi Goujani,

Pezdevšek Malovrh

et al. 2024

Int. J. Environ. Sci. Technol.

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Are seed dispersal and seedling establishment distance- and/or density-dependent in naturally regenerating larch patches? A within-patch scale analysis using an eigenvector spatial filtering approach

Cited by 4 publications

References 88 publications

Competition and density dependence in arid mountain forest stands: revealing the complex process from spatial patterns

Competition and density dependence in arid mountain forest stands: revealing the complex process from spatial patterns

Spatiotemporal Dynamics of Betula pendula Crown Cover on Abandoned Arable Land in a Broad-Leaved Forest Zone of Bashkir Cis-Ural

Scenario simulation in decision-making optimization: lessons from social coppice forests

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