scholarly journals Divergent hydraulic strategies to cope with freezing in co-occurring temperate tree species with special reference to root and stem pressure generation

2018 ◽  
Vol 219 (2) ◽  
pp. 530-541 ◽  
Author(s):  
Xiao-Han Yin ◽  
Frank Sterck ◽  
Guang-You Hao
Keyword(s):  
Special Reference ◽  
Tree Species

scholarly journals Climatic limits for the present European distribution of hornbeam (Carpinus betulus), with special reference to Ukraine

2018 ◽  
Author(s):  
Volodymyr Tytar
Keyword(s):  
Special Reference ◽  
Tree Species ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
Climatic Factors ◽  
Niche Modeling ◽  
Limiting Factor ◽  
Carpinus Betulus ◽  
Modeling Approach ◽  
The Common

In this study, we used a ecological niche modeling approach to detect the importance of diverse climatic parameters in controlling the distribution of forest tree species, exemplified by the common hornbeam (Carpinus betulus L.), with special reference to Ukraine from where digitized data on the species has been scarce. In Ukraine populations of this tree species are found on the edge of its home range and are exposed to extreme climate conditions. The main objectives of the present study were to model the European-wide ecological niche of the common hornbeam and investigate primary climatic factors that control the potential distribution of this tree in Ukraine. Using an ecological niche modeling approach, we consider having reliably modeled the European-wide bioclimatic niche of the common hornbeam for predicting the response of species geographical distribution to climate. Most contributing to the model was the mean monthly PET (potential evapotranspiration) of the coldest quarter, continentality and annual PET. In terms of the Most Limiting Factor, in Ukraine continentality is crucial throughout the majority of the country.

Wood Anatomy of Anacardiaceae from India with Special Reference to Systematic Position of Rhus

IAWA Journal ◽  
2008 ◽  
Vol 29 (1) ◽  
pp. 79-106 ◽  
Author(s):  
Sangeeta Gupta ◽  
Manisha Agarwal
Keyword(s):  
Special Reference ◽  
Tree Species ◽  
Wood Anatomy ◽  
Systematic Position ◽  
Indian Species ◽  
Evergreen Species ◽  
The Family ◽  
Feature List ◽  
Ray Cells ◽  
Pistacia Terebinthus

The present publication provides a comprehensive wood anatomical survey of woods of Indian tree species of the family Anacardiaceae. Thirtyfive species belonging to 19 genera are described as per the feature list of IAWA. Intrusive fibre cavities and perforated ray cells have been reported in Holigarna arnottiana and Pistacia terebinthus respectively. Two species, Choerospondias axillaris and Rhus hookeri, lacked helical thickening despite being ring-porous. Most tribes of the Anacardiaceae appear to be heterogeneous wood anatomically, except Semecarpeae which are homogeneous. The tribes Mangiferae and Semecarpeae are quite similar and may be placed together. Interesting findings were made regarding Indian species of Rhus, which can be divided into two groups. It is suggested to recognise Rhus Group II as a separate section. The ecological trends suggest that anatomical differentiation exists between tropical and temperate species as well as deciduous and evergreen species.

Aspects of the ecology of siricid woodwasps (Hymenoptera: Siricidae) in Europe, North Africa and Turkey with special reference to the biological control of Sirex noctilio F. in Australia

1978 ◽  
Vol 68 (3) ◽  
pp. 341-359 ◽  
Author(s):  
J. P. Spradbery ◽  
A. A. Kirk
Keyword(s):  
Biological Control ◽  
Special Reference ◽  
North Africa ◽  
Tree Species ◽  
Ecological Status ◽  
Host Tree ◽  
Parasitoid Species ◽  
Sirex Noctilio ◽  
Host Tree Species ◽  
Made In

AbstractCollections of siricid-infested coniferous trees were made in 150 localities in 19 European countries, Turkey and North Africa to obtain parasites and parasitoids of siricids for use in the biological control of Sirex noctilio F. in Australia. During this work, information was obtained on the distribution and biology of 8 siricid species (S. noctilio, S. cyaneus F., S. juvencus L., Urocerus augur (Kiug), U. gigas. (L.), U. sah (Mocs.), U. fantoma (F.), Xeris spectrum (L.)) and 7 parasitoids (Rhyssa persu.asoria (L.), R. amoena. Gray., Pseudorhyssa maculicoxis (Krchb.), Megarhyssa emarginatoria (Thnb.), Ibalia leucospoides leucospoides (Hochenw.), I. rufipes drewseni Borries, Odontocolon geniculatum. (Krchb.)). Data are presented on distribution, flight periods and sexratios (determined from emergence records), factors leading to the susceptibility of timber to siricid infestation and the types of timber and host tree species infested. Levels of parasitism by the various parasitoid species, determined from emergence records, are given. Localities are assigned to bioclimatic categories, and their siricid and parasitoid species are classified in relation to the climatic criteria. The ecological status of S. noctilio is discussed in relation to its establishment in Australia.

scholarly journals Afforestation in Serbia in the period 1961-2007 with special reference to Austrian pine and Scots pine

2009 ◽  
pp. 115-134 ◽  
Author(s):  
Nenad Rankovic
Keyword(s):  
Special Reference ◽  
Scots Pine ◽  
Tree Species ◽  
Forest Policy ◽  
National Forest ◽  
Special Significance ◽  
Future Period ◽  
Action Programme ◽  
Relationship Of ◽  
The Relationship

The significance of afforestation in Serbia is high because only in this way the forest area can be increased and brought to the level which corresponds to the demands of the population. This is also indicated by the content of some documents, such as 'Professional base for the design of the National Forest Action Programme', which emphasises this problem from the very beginning. Special significance is assigned to afforestation with Austrian pine and Scots pine, which are most frequently applied in the afforestation of the most unfavourable terrains. This study analyses the scope of afforestation over the period 1961-2007, the percentage of Austrian pine and Scots pine and the relationship of the afforested areas, and generates the forecasts of the changes in the future period. In this way, the socialeconomic significance of afforestation can be assessed from the aspect of satisfying the objectives of forest policy, and particularly of afforestation with Austrian pine and Scots pine, as the specific tree species.

Ecological aspects of birch

1984 ◽  
Vol 85 (1-2) ◽  
pp. 65-72 ◽  
Author(s):  
C. H. Gimingham
Keyword(s):  
Special Reference ◽  
Tree Species ◽  
Subsequent Development ◽  
Ground Vegetation ◽  
Bare Ground ◽  
North West ◽  
Ecological Aspects ◽  
Different Types ◽  
The Status ◽  
Extreme North

SynopsisThe respective ecological amplitudes of the two British tree species of Betula are known only imperfectly. B. pendula is better represented on drier, lighter soils and is more of a southern, eastern and lowland species than B. pubescens, which belongs rather to the wetter, colder conditions of north, west and upland Britain. The contribution of the two species to different types of woodland community is briefly reviewed in this paper, and consideration is given to the status of ‘pure’ birchwoods. In some cases, the latter may have been derived from other woodland types; in others, by invasion of heath or grassland. However, some relict birchwoods above the altitudinal limits of dominance by other trees, and in the extreme north and west of Scotland, may be ‘natural’ or ‘climax’ woods.Birches show a number of characteristics of ‘r-selected’ plants and hence tend to be trees of secondary or seral woodlands. Factors determining the capacity of birch species to colonize bare ground or vegetation such as heath and grassland, are reviewed, with special reference to a study of invasion of Calluna heath at Dinnet, Aberdeenshire. The importance of the development of gaps in the Calluna canopy, or alternatively of fire, in providing suitable sites for establishment, is emphasized.Changes in the ground vegetation following the establishment of birch stands are outlined, as well as the subsequent development of seral birchwoods. Attention is drawn to the fact that many upland birchwoods are becoming moribund, and to the effects of grazing and other influences in preventing regeneration. The possibility of reversing this trend is discussed.

ECOTYPIC VARIATION IN PHOTOPERIODISM OF TREES WITH SPECIAL REFERENCE TO PINUS RESINOSA AND THUJA OCCIDENTALIS

1962 ◽  
Vol 40 (6) ◽  
pp. 849-856 ◽  
Author(s):  
O. Vaartaja
Keyword(s):  
Special Reference ◽  
Growth Pattern ◽  
Tree Species ◽  
Pinus Resinosa ◽  
Photoperiodic Response ◽  
Endogenous Rhythm ◽  
Thuja Occidentalis ◽  
Ecotypic Variation ◽  
Middle Latitudes ◽  
Broad Subject

A certain daylength treatment inhibited the growth of northern seedlings of Pinus resinosa and Thuja occidentalis more than it inhibited southern seedlings of these species. These treatment – seed source interactions were small, but otherwise similar to those found earlier in 29 northern tree species. The smallness of the interaction was caused by the overruling effect of the endogenously determined growth pattern in P. resinosa, and by the lack of large photoperiodic response in T. occidentalis.The broad subject of ecotypic variation in the photoperiodism of trees is discussed. The evolution of dormancy mechanism suggests that photoperiodism should tend to be overruling in the truly northern trees, and the endogenous rhythm in trees from the middle latitudes.

Searching for criteria for the selection of efficient tree species for fallow improvement, with special reference to carbon and nitrogen

1995 ◽  
Vol 42 (1-3) ◽  
pp. 297-314 ◽  
Author(s):  
G�tz Schroth ◽  
Dorothee Kolbe ◽  
Balle Pity ◽  
Wolfgang Zech
Keyword(s):  
Special Reference ◽  
Tree Species ◽  
Carbon And Nitrogen ◽  
Selection Of
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