From young to adult trees: How spatial patterns of plants with different life strategies change during age development in an old-growth Korean pine-broadleaved forest

Omelko, Alexander M.; Ukhvatkina, Olga; Zhmerenetsky, Alexander; Sibirina, L. A.; Petrenko, Tatyana Y.; Bobrovsky, M. V.

doi:10.1016/j.foreco.2018.01.023

Cited by 40 publications

(43 citation statements)

References 32 publications

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“…In addition, our study sites are in relatively wet areas, not far from the coast, which also eliminate fire. Charcoal analyses were also made for study sites in Russia (as fires could be more expected there) and carbon dating (if charcoal was found) confirmed that there were no fires during the period covered by the oldest tree in our study (58). More information on study sites and the tree-ring network are provided in SI Appendix, Methods.…”

Section: Methodsmentioning

confidence: 54%

Poleward migration of the destructive effects of tropical cyclones during the 20th century

Altman

Ukhvatkina

Omelko

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

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Determination of long-term tropical cyclone (TC) variability is of enormous importance to society; however, changes in TC activity are poorly understood owing to discrepancies among various datasets and limited span of instrumental records. While the increasing intensity and frequency of TCs have been previously documented on a long-term scale using various proxy records, determination of their poleward migration has been based mostly on short-term instrumental data. Here we present a unique tree-ring–based approach for determination of long-term variability in TC activity via forest disturbance rates in northeast Asia (33–45°N). Our results indicate significant long-term changes in TC activity, with increased rates of disturbances in the northern latitudes over the past century. The disturbance frequency was stable over time in the southern latitudes, however. Our findings of increasing disturbance frequency in the areas formerly situated at the edge of TC activity provide evidence supporting the broad relevance of poleward migration of TCs. Our results significantly enhance our understanding of the effects of climate change on TCs and emphasize the need for determination of long-term variation of past TC activity to improve future TC projections.

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Section: Methodsmentioning

confidence: 54%

Poleward migration of the destructive effects of tropical cyclones during the 20th century

Altman

Ukhvatkina

Omelko

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

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“…The horizontal distribution pattern of trees has always been a research hotspot. It is believed to be directly related to ecological processes within the forest community (e.g., seed dispersion, regeneration, death, resource utilization, and gap formation - Wiegand & Moloney 2013, Omelko et al 2018, and strongly influences tree growth and timber yield (Del Río et al 2016). In contrast, vertical structure has not attracted much attention.…”

Section: Introductionmentioning

confidence: 99%

“…However, the relationship between upstory and understory is not fully understood (Barbier et al 2008). Most studies of the spatial structure of forest communities consider the species comprising the community as a whole (Hui & Pommerening 2014, Carrer et al 2018, while others have analyzed the spatial correlation of the different life histories of single populations or several groups of the same genus (Hao et al 2007, Zhang et al 2010, Omelko et al 2018. Still other studies have focused on tree groups that belong to certain synusia or growth stages, such as seedlings and small trees (Collet et al 2017), or dominant trees (Torimaru et al 2013, Ghalandarayeshi et al 2017.…”

Section: Introductionmentioning

confidence: 99%

“…The species composition of forests in temperate regions is relatively simple and, due to the particular renewal and growth characteristics of some species (e.g., "wave", "stop-and-go", or "continuous and fast growing" strategies - Hao et al 2007), vertical stratification is common (Gazol & Ibáñez 2009, Torimaru et al 2013, Ghalandarayeshi et al 2017, Omelko et al 2018. However, in tropical South Asia, there is an abundance of species components and a continuous distribution of species in the vertical direction can readily occur.…”

Section: Introductionmentioning

confidence: 99%

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Spatial structure of the vertical layers in a subtropical secondary forest 57 years after clear-cutting

Li¹,

He²,

Yu³

et al. 2019

iForest

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Stratification is an important phenomenon in natural forests. The mixed pineoak forests along the Nanpan River in southwest China was clearly formed by two layers in the vertical direction. These forests developed in an area where the virgin forests suffered clear-cutting. After excluding habitat heterogeneity, we divided two plots into upper and lower layers according to the tree height, and then analyzed the spatial pattern, species distribution, and size differentiation using the pair correlation function g(r) and the mark correlation function (MCF) kmm (r), respectively. The following key results were obtained: (1) the upstory was slightly clustered, whereas the understory had an intensively clumped pattern. An uneven pattern of germplasm resources in the early stages of succession and seed dispersion limitation may have contributed to the aggregation of tree species. (2) The spatial correlation among the main populations in each layer, and between both layers, had a largely random association, suggesting that differences in tree growth and physiological characteristics play an important role in species association. (3) Species aggregation decreased as the observation scale increased; however, the aggregation intensity of the understory was significantly higher than that of the upstory, which may be related to negative density dependence and niche complementarity. (4) Size differentiation in the upstory was significant, with small trees gathered together. There were no obvious differences in tree size in the lower layer, indicating a higher competitive pressure among trees in the upper layer. In conclusion, the spatial structure of trees in terms of vertical stratification differs, which is of great significance for investigating the mechanisms by which species coexist.

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“…Revealing the mechanisms behind the species distribution pattern remains a considerable challenge, since different processes such as species interactions and environmental factors can promote the formation of similar patterns. Spatial point pattern analysis is generally applied to effectively demonstrate the ecological processes and potential mechanisms of species coexistence (Erfanifard & Stereńczak, 2017;Luo, Mi, Chen, Ye, & Ding, 2012;Omelko et al, 2018;Shuai, Wang, & Yu, 2014;Wiegand et al, 2007;Zhu, Mi, Ren, & Ma, 2010). However, few studies have been conducted in the forests located in the temperate-subtropical transition region, and it remains unclear how the mechanisms of community assembly interact and how they change during the various life stages.…”

mentioning

confidence: 99%

Spatial distribution and interspecific associations in a deciduous broad‐leaved forest in north‐central China

Zhou

Shi

Xiao

et al. 2019

J Vegetation Science

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Questions What are the primary types of intraspecific distribution patterns and interspecific associations of tree species in the temperate–subtropical transition region? Can potential ecological mechanisms such as habitat heterogeneity, dispersal limitation, density dependence, spatial segregation, and competition between species regulate these patterns? Location The Qinling Mountains, north‐central China. Methods Ripley's K‐function, D‐function and pair correlation function were applied to assess the spatial distribution of 15 dominant tree species in a fully mapped 25‐ha plot. Complete spatial randomness (CSR), heterogeneous Poisson (HP) and random‐labelling (RL) null models were used to reveal the potential process of community construction. Results (a) Thirteen of 15 adult tree species displayed an aggregation distribution at various scales. (b) Eleven adult species (73.3%) showed significant aggregation, especially at small distances, after removing the effect of habitat. (c) The percentage of species showing additional aggregation relative to adults decreased from saplings to juveniles. The maximum strength of density dependence was negative with species abundance. (d) Only 29 (13.8%) of the species pairs showed significant small‐scale interactions. Most of the significant small‐scale associations did not occur in abundant species pairs. (e) Negative interactions of interspecific associations were more prevalent than positive ones, yet there was no consistency of the characteristics among species pairs. Conclusions Habitat heterogeneity and dispersal limitation likely contribute to the spatial pattern of tree species at different life stages. Density dependence remains the important factor in maintaining species diversity in this forest stand. Moreover, spatial segregation generates the interspecific spatial patterns of segregation and partial overlap. Unexpectedly, the species herd protection hypothesis and the low‐frequency hypothesis cannot well explain the mechanism of interspecific interaction at small distances. Resource competition might be responsible for negative associations being more frequent among species pairs.

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From young to adult trees: How spatial patterns of plants with different life strategies change during age development in an old-growth Korean pine-broadleaved forest

Cited by 40 publications

References 32 publications

Poleward migration of the destructive effects of tropical cyclones during the 20th century

Poleward migration of the destructive effects of tropical cyclones during the 20th century

Spatial structure of the vertical layers in a subtropical secondary forest 57 years after clear-cutting

Spatial distribution and interspecific associations in a deciduous broad‐leaved forest in north‐central China

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