Transmission of genetic variation from the adult generation to naturally established seedling cohorts in small forest stands of pedunculate oak (Quercus robur L.)

2014 ◽  
Vol 312 ◽  
pp. 19-27 ◽  
Author(s):  
Guy Vranckx ◽  
Hans Jacquemyn ◽  
Joachim Mergeay ◽  
Karen Cox ◽  
Vincent Kint ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Quercus Robur ◽  
Pedunculate Oak ◽  
Forest Stands ◽  
Small Forest

scholarly journals Tree potential growth varies more than competition among spontaneously established forest stands of pedunculate oak (Quercus robur)

2020 ◽  
Vol 77 (3) ◽  
Author(s):  
Dominique Lamonica ◽  
Joern Pagel ◽  
Elena Valdés-Correcher ◽  
Didier Bert ◽  
Arndt Hampe ◽  
...  
Keyword(s):  
Quercus Robur ◽  
Stand Structure ◽  
Model Parameters ◽  
Pedunculate Oak ◽  
Forest Stands ◽  
Potential Growth ◽  
Competitive Effects ◽  
Size Dependent ◽  
Natural Establishment ◽  
Growth Variation

Abstract Key message Analyses of dendrochronological data from 15 recently established tablished stands of pedunculate oak (Quercus robur L.) revealed that functions describing potential tree growth in the absence of neighbours varied more between stands than functions describing competitive effects of conspecific neighbours. This suggests that competition functions can more easily be transferred among stands than potential growth functions. Context The variability inherent in the natural establishment of tree stands raises the question whether one can find general models for potential growth and competition that hold across stands. Aims We investigated variation in potential growth and competition among recently established stands of Q. robur and tested whether this variation depends on stand structure. We also tested whether competition is symmetric or asymmetric and whether it is density-dependent or size-dependent. Lastly, we examined whether between-year growth variation is synchronous among stands. Methods Potential growth, competition and between-year growth variation were quantified with statistical neighbourhood models. Model parameters were estimated separately for each stand using exhaustive mapping and dendrochronology data. Results Competition was best described with an asymmetric size-dependent model. Functions describing potential growth varied more among forest stands than competition functions. Parameters determining these functions could not be explained by stand structure. Moreover, annual growth rates showed only moderate synchrony across stands. Conclusion The substantial between-stand variability in potential growth needs to be considered when assessing the functioning, ecosystem services and management of recently established Q. robur stands. In contrast, the relative constancy of competition functions should facilitate their extrapolation across stands.

scholarly journals Norway maple (Acer platanoides) and pedunculate oak (Quercus robur) demonstrate different patterns of genetic variation within and among populations on the eastern border of distribution ranges

2021 ◽  
Vol 67 (No. 11) ◽  
pp. 522-532
Author(s):  
Artur Akhmetov ◽  
Ruslan Ianbaev ◽  
Svetlana Boronnikova ◽  
Yulai Yanbaev ◽  
Aygul Gabitova ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Genetic Differentiation ◽  
Population Genetic ◽  
Quercus Robur ◽  
Distribution Area ◽  
Pedunculate Oak ◽  
Acer Platanoides ◽  
Norway Maple ◽  
Key Species

Norway maple (Acer platanoides L.) is a key species of broadleaved forests whose population genetics is poorly studied using modern genetic tools. We used ISSR analysis to explore genetic diversity and differentiation among 10 Russian populations on the eastern margin of the species range of distribution, and to compare the revealed patterns with the results of our population genetic studies of pedunculate oak (Quercus robur L.). In the first set comparatively high heterozygosity and allelic diversity were found (expected heterozygosity H<sub>E</sub> = 0.160 ± 0.033, number of alleles n<sub>a</sub> = 1.440 ± 0.080, effective number of alleles n<sub>e</sub> = 1.271 ± 0.062) in comparison with strongly fragmented and geographically isolated small maple stands of the second set (H<sub>E</sub> = 0.083 ± 0.011, n<sub>a</sub> = 1.281 ± 0.031, n<sub>e</sub> = 1.136 ± 0.019). A relatively high genetic differentiation among populations was detected (the proportion of the inter-population component of total genetic variation, G<sub>ST</sub> = 0.558 ± 0.038). In the Cis-Urals, local groups of populations that are confined to the northern, middle and southern parts of the Urals were identified. On the contrary, the current significant fragmentation of the pedunculate oak distribution area in the same study area did not lead to any noticeable genetic differentiation among the majority of populations, the values of the population genetic diversity were very similar in different parts of the Southern Urals.

scholarly journals Adaptive potential of Pedunculate oak in geographical cultures of the Lower Don

2021 ◽  
pp. 45-68
Author(s):  
С.Н. Кружилин ◽  
Т.Ю. Баранова ◽  
О.С. Ищенко ◽  
Ю.Н. Писаренко
Keyword(s):  
Quercus Robur ◽  
Practical Importance ◽  
Pedunculate Oak ◽  
Forest Stands ◽  
Adaptive Potential ◽  
Natural Area ◽  
Morphological Knowledge ◽  
Protected Natural Area ◽  
State Nature Reserve ◽  
State Nature

Дуб черешчатый, формируя искусственные лесные насаждения имеет различные формы или разновидности: географические, эдафические, фенологические и морфологические. Важное прикладное значение имеют знания о продуктивности и росте географических форм лесных насаждений, для чего создают и в дальнейшем исследуют специальные лесные культуры. Для изучения географической изменчивости видов древесных растений и уточнения их ценности для лесного хозяйства, создания массивов географических пород из посевного материала разного географического происхождения создают испытательные насаждения различных ценных пород. Государственный природный заказник "Горненский", расположенный в центральной части Ростовской области, являясь особо охраняемой природной территорией областного значения, имеет уникальные объекты географических культур, в частности дуба черешчатого (Quercus robur L.). В статье отражены исследования географических культур дуба черешчатого, произрастающих на территории заказника. Исследовано 9 вариантов. Определены лесоводственно-таксационные характеристики изученных вариантов. Выявлено, что к возрасту 42 года лучшее состояние имеют насаждения дуба, созданные из желудей, привезенных из Ставропольского края. Petiolate oak, forming artificial forest stands, has various forms or varieties: geographical, edaphic, phenological and morphological. Knowledge about the productivity and growth of geographical forms of forest stands is of great practical importance, for which special forest crops are created and further studied. To study the geographical variability of woody plant species and clarify their value for forestry, to create arrays of geographical rocks from seed material of different geographical origin, test plantings of various valuable species are created. The state nature Reserve "Gornensky", located in the central part of the Rostov region, is a specially protected natural area of regional significance, has unique objects of geographical cultures, in particular the oak petiolate (Quercus robur L.). The article reflects the research of geographical cultures of oak petiolate growing on the territory of the reserve. 9 variants were investigated. The forestry and taxation characteristics of the studied variants are determined. It was revealed that by the age of 42, the best condition is the oak plantings created from acorns brought from the Stavropol Territory.

Growth and management of mixed Pinus sylvestris - Quercus robur stands in Flanders, Belgium

1993 ◽  
Vol 58 ◽  
Author(s):  
D. Maddelein ◽  
J. Neirynck ◽  
G. Sioen
Keyword(s):  
Pinus Sylvestris ◽  
Natural Regeneration ◽  
Quercus Robur ◽  
Good Growth ◽  
Pedunculate Oak ◽  
Selection System ◽  
Management Options ◽  
Stand Management ◽  
Pine Stands

Mature  Scots pine (Pinus sylvestris  L.) stands are dominating large parts of the Flemish forest area. Broadleaved  species regenerate spontaneously under this pine canopy. This study studied  the growth and development of two planted pine stands with an older natural  regeneration, dominated by pedunculate oak (Quercus  robur L.), and discussed management options for  similar stands.     The results indicated a rather good growth of the stands, with current  annual increments of 5 m3.ha-1.yr-1. The pine overstorey is growing into valuable sawwood  dimensions, while the broadleaved understorey slowly grows into the  upperstorey. The quality of the regeneration is moderate but can be improved  by silvicultural measurements (pruning, early selection).     In both stands, an interesting (timber production, nature conservation)  admixture of secondary tree species is present in the regeneration. Stand  management is evolving from the classical clearcut system towards a  combination of a type of selection and group selection system.

scholarly journals Population genetic structure of pedunculate oak (Quercus robur L.) in Belarus according to the analysis of chloroplast DNA

2021 ◽  
pp. 59-70
Author(s):  
Vladimir E. Padutov
Keyword(s):  
Genetic Structure ◽  
Chloroplast Dna ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Quercus Robur ◽  
Phylogenetic Trees ◽  
Rflp Analysis ◽  
Pedunculate Oak ◽  
Maximum Likelihood Methods ◽  
The Republic

Pedunculate oak (Quercus robur L.) is one of the main forest forming species in the Republic of Belarus. Its population genetic structure was formed under the influence of various migration processes. Six chloroplast DNA loci (µdt1, µdt3, µdt4, µcd4, µcd5 and µkk4) were used for the genogeographic study. The material for the analysis was collected in 100 oak forest stands (2325 samples); 18 allelic variants were identified, which are grouped into 17 different combinations (haplotypes). Five of them are widespread (the proportion of occurrence varies from 7 to 48 %, totalling 85 %). The remaining 12 are rare (the proportion of occurrence varies from 1 to 3 %, totalling 15 %). Phylogenetic trees constructed using the nearest neighbour and maximum likelihood methods show the presence of two groups (branches) of haplotypes. One of it comprises 8 variants including 2 dominant haplotypes and the other comprises 9 variants including 3 dominant haplotypes. PCR-RFLP analysis of chloroplast DNA showed that the pedunculate oak in Belarus originates from the Balkan refugium. Haplotype No. 1 (µdt189, µdt3123, µdt4142, µcd494, µcd574, µkk4109) is found almost everywhere in Belarus with the exception of the southwest and northeast, while haplotype No. 8 (µdt189, µdt3121, µdt4142, µcd494, µcd574, µkk4109) is mainly localised in the southwest and northeast. Haplotypes No. 3 (µdt189, µdt3120, µdt4141, µcd494, µcd575, µkk4109) and No. 7 (µdt189, µdt3122, µdt4142, µcd494, µcd574, µkk4109) predominantly found in the west of the country. Haplotype No. 2 (µdt190, µdt3120, µdt4141, µcd495, µcd574, µkk4109) is typical for the southeast.

scholarly journals Appreciation of tolerance at the impact of thermal stress on photosystem ii activity in the leaves of pedunculate oak (Quercus robur L.) trees of different ecological origin

2021 ◽  
Vol 13 (1(22)) ◽  
pp. 13-20
Author(s):  
Petru Cuza ◽  
Keyword(s):  
Thermal Stress ◽  
Photosystem Ii ◽  
Quercus Robur ◽  
Central Area ◽  
Extreme Weather Events ◽  
Pedunculate Oak ◽  
Adaptation Capacity ◽  
Oak Trees ◽  
Photosystem Ii Activity ◽  
The Impact

Extreme weather events with high temperatures and strong sunlight have increased alarmingly in the last few decades, considerable affecting plant photosynthesis. In this study, the impact of thermal stress on photosystem II activity in the leaves of pedunculate oak trees (Quercus robur L.) of different ecological origin was assessed. Four days after the thermal shock application with a temperature of 50°C during 20, 40, 60 minutes, the processes of recovery on photosystem II activity in the leaves of the oak trees in the investigated provenances took place with different speed and fullness. The recovery of the functional state of photosystem II in the leaves of the trees showed that in the environmental conditions of the ,,Plaiul Fagului” reservation territory an advanced thermotolerance to the thermal stress action was specifi c for the origin from the north of the country (Edinet). The leaves of the trees of local and southern origin showed a low resistance to the thermal stress action. The advanced adaptation capacity, the high growth rate of the trees from the northern provenance suggest that the acorn harvested from the oaks of northern origin can be used for the works of extension of the afforestation areas in the central area of the Republic of Moldova.

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