scholarly journals Acorn storage in tree cavities by Eurasian jay (Garrulus glandarius L.)

2021 ◽  
Author(s):  
Aleksandra Wróbel ◽  
Przemysław Kurek ◽  
Dorota Dobrowolska
Keyword(s):  
Quercus Robur ◽  
Red Oak ◽  
Pedunculate Oak ◽  
Northern Red Oak ◽  
Future Studies ◽  
Tree Cavities ◽  
Garrulus Glandarius ◽  
First Case ◽  
Protection Strategies ◽  
Cache Protection

AbstractSeed hoarding by granivorous animals requires cache-protection strategies which allow to protect hoarded seeds against pilferage. This study reports the first case of acorn hoarding in tree cavities by Eurasian Jays (Garrulus glandarius). Out of 116 removed acorns of both pedunculate oak (Quercus robur) and Northern red oak (Q. rubra), we localized 14 consumed and 102 stored acorns. Five experimental acorns (4.9% of stored acorns) were found stored in tree cavities. The notion that hoarding seeds in tree cavities may constitute a cache-protection behavior of Eurasian Jays represents a working hypothesis that ought to be tested in future studies.

Composites from northern red oak (Quercus robur) leaves and plant oil-based resins

2012 ◽  
Vol 127 (1) ◽  
pp. 18-26 ◽  
Author(s):  
A. Campanella ◽  
R. P. Wool ◽  
M. Bah ◽  
S. Fita ◽  
A. Abuobaid
Keyword(s):  
Quercus Robur ◽  
Red Oak ◽  
Northern Red Oak ◽  
Plant Oil

scholarly journals The negative impact of intentionally introduced Quercus rubra L. on a forest community

2014 ◽  
Vol 83 (1) ◽  
pp. 39-49 ◽  
Author(s):  
Beata Woziwoda ◽  
Dominik Kopeć ◽  
Janusz Witkowski
Keyword(s):  
Ecosystem Services ◽  
Quercus Rubra ◽  
Woody Species ◽  
Interdisciplinary Studies ◽  
Forest Community ◽  
Red Oak ◽  
Pedunculate Oak ◽  
Northern Red Oak ◽  
Economic Point ◽  
Positive Effects

<p>Some alien woody species used in commercial forestry become invasive and, as invaders, cause major problems in natural and semi-natural ecosystems. However, the deliberate introduction of aliens can bring unintended negative changes also within areas of their cultivation. This paper presents the effects of the intentional introduction of the North-American <em>Quercus rubra</em> in European mixed Scots pine-Pedunculate oak forests (POFs): <em>Querco roboris-Pinetum</em> (W. Mat. 1981) J. Mat. 1988. Phytosociological data from field research combined with GIS data analysis of the current distribution of Northern Red oak in the studied habitat were used to determine the composition and structure of forest communities in plots with and without <em>Q. rubra</em> participation. </p><p>The results show that <em>Q. rubra</em> significantly reduces native species richness and abundance, both in old-growth and in secondary (post-agricultural) forests. Not one resident vascular plant benefits from the introduction of Northern Red oak and only a few are able to tolerate its co-occurrence. The natural restocking of all native woody species is also strongly limited by this alien tree. </p><p>The introduction of Northern Red oak significantly limits the environmental functions of the POF ecosystem and weakens its economic and social aspects. However, its further cultivation is justified from an economic point of view, as the essential function of the studied forests is commercial timber production, and the introduction of this fast growing alien tree supports the provisioning ecosystem services. A clear description of the level of trade-off between the accepted negative and positive effects of the introduction of <em>Q. rubra</em> on forest ecosystem services requires further interdisciplinary studies.</p>

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.

An analysis of a spontaneous ingrowth of deciduous trees in 70 year old stands of Scots pine

1987 ◽  
Vol 52 ◽  
Author(s):  
N. Lust
Keyword(s):  
Scots Pine ◽  
Red Oak ◽  
Deciduous Trees ◽  
Pedunculate Oak ◽  
Black Cherry ◽  
Height Distribution ◽  
Stem Number ◽  
Pine Stands ◽  
Spontaneous Regeneration ◽  
Scots Pine Stands

In 70  years old homogeneous Scots pine stands, bordered by a hardwood belt, an  analysis was made about the spontaneous ingrowth of natural seedlings. The  analysis involved especially the following points: species and stem number,  influence of the hardwood belts, diameter and height distribution, age,  growth and structure. From the age of 30 years, a spontaneous regeneration of  hardwoods established in Scots pine stands. There are on average 7,000 plants  per ha, 80 % of which are black cherry and another fair number are red oak  and pedunculate oak. The regeneration has an average age of 25 to 30 years,  it is uneven aged, contains several diameter and height classes and has  already partially penetrated the upper stratum.     The spontaneous ingrowth allows to convert in a simple way the homogeneous  coniferous stands into mixed hardwood stands.

Does the invasion of Northern Red Oak Quercus rubra in parkland influence the diversity of birds?

Biologia ◽  
2017 ◽  
Vol 72 (2) ◽  
Author(s):  
Emilia Grzędzicka ◽  
Katarzyna Kowalik ◽  
Barbara Bacler-Żbikowska
Keyword(s):  
Plant Species ◽  
Bird Species ◽  
Coal Industry ◽  
Alien Plants ◽  
Forest Birds ◽  
Bird Diversity ◽  
Red Oak ◽  
Northern Red Oak ◽  
Alien Plant Species ◽  
Alien Plant

AbstractInvasive plants are non-native, but in most cases naturalised, species that have successfully spread outside of their native range. Aliens invaded all habitats, are competing with native plants, thus, after the direct destruction of habitats, invasions are recognised as the second largest danger for biodiversity. Northern Red Oak is one of the most common invasive tree species dispersed primarily by birds, but new studies have shown that it is also spread continuously in a forest stand. The main aim of our research was to check how strong is the invasion of Northern Red Oak in Silesia Park, where it was introduced together with other alien plant species, and how this invasion interacts with bird diversity. Silesia Park was created 65 years ago on the surface largely ravaged by coal industry. Because many studies indicate birds as vectors of alien plants invasion, we examined the bird fauna in a described area, looking for species that can contribute to spreading oaks. Research showed the diversity of 50 bird species. Surface with a presence of Northern Red Oak was characterised by greater participation of alien plant species than the patch of natural forest, which existed there long before the park creation. The greatest bird diversity was found in the most natural part of Silesia Park, and the lowest in the area of invasion, especially in the case of species classified as “forest birds”. The presence of alien plants increased number of “non-forest” birds, mostly synanthropic species. We also found that Northern Red Oak spreads by spontaneous seed dispersal.

Survival and growth of understory trees in oak forests of the Hudson Highlands, New York

1981 ◽  
Vol 11 (3) ◽  
pp. 689-695 ◽  
Author(s):  
Craig G. Lorimer
Keyword(s):  
New York ◽  
Growth Rates ◽  
Red Oak ◽  
Northern Red Oak ◽  
Average Growth Rate ◽  
Average Growth ◽  
Red Oaks ◽  
Oak Trees ◽  
Survival And Growth ◽  
Understory Trees

Mortality and growth rates of trees in various crown classes and size classes were analyzed from 40-year permanent plot records of slope and ravine forest dominated by chestnut oak (Quercusprinus L.) and northern red oak (Quercusrubra L.). Average 5-year mortality rates for suppressed trees ≥2.5 cm dbh of chestnut oak and red oak in the slope forest were 26 and 45%, respectively. None of the suppressed red oaks survived the 40-year period, compared with 14% of the chestnut oaks and 33% of the red maples (Acerrubrum L.). Mortality of oak trees in the intermediate crown class was less than half that of suppressed trees, but still much higher than that of maples and birches on the tracts. Survival was reasonably high for oaks as long as the top of the crown was receiving direct sunlight, but the expected 40-year survival rate of red oaks in such a position is only 20%, with an average growth rate of 1.0 mm in diameter per year. Curves and equations expressing average mortality and growth rates at various levels of competition are presented for each species.

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