scholarly journals Estudio climatológico de los Pirineos centrales franceses

1991 ◽  
Vol 16 ◽  
pp. 405-416
Author(s):  
Marcel Gruber
Keyword(s):  
Quercus Petraea ◽  
Betula Pubescens ◽  
Carpinus Betulus

Algunos valles (Neste d'Aure, Gave de Pau) presentan un clima ligeramente continental y su vegetación y flora se caracterizan por la presencia de Pinos sylvestris, Quereos petraea (en el piso montano) con hayedos y abetales mesófilos o mesoxerófilos; en el piso subalpino, Pinos uncinata y Arctostaphylos uva-ursi son predominantes con los prados secos y abiertos. Otros valles más húmedos (Adour, Baréges) poseen más hayedos o abetales higrófilos y pocos bosques de Pinos sylvestris y Quercus petraea; Betula pubescens, Pinos uncinata y Rhododendron ferrogineum tienen mayor importancia en el piso subalpino con los prados húmedos. En el piso colino de los Pirineos centrales, Quereos robur es el roble dominante pero otras especies se desarrollan también en esta región atlántica: Quereos petraea, Q. pyrenaica, Q. pubescens y Carpinus betulus.

Naetrocymbe fraxini. [Descriptions of Fungi and Bacteria].

2015 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
New York ◽  
Czech Republic ◽  
Geographical Distribution ◽  
Conservation Status ◽  
Quercus Petraea ◽  
Betula Pubescens ◽  
Andaman And Nicobar Islands ◽  
Crataegus Monogyna ◽  
Fraxinus Nigra ◽  
Nicobar Islands

Abstract A description is provided for Naetrocymbe fraxini. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (USA (Maine, Michigan, Minnesota, New York, Ohio and Vermont), India (Andaman and Nicobar Islands, Karnataka and Kerala), Turkey, Cuba, Austria, Belgium, Czech Republic, Finland, Germany, Greece, Hungary, Irish Republic, Netherlands, Norway, Romania, Russia (Kabardino-Balkar Republic), Spain, Sweden and UK), hosts (Fraxinus sp., Betula pubescens, Betula sp., Crataegus monogyna, Crataegus sp., Fraxinus nigra, F. ornus and Quercus petraea) and associated organisms (Dirinaria purpurascens and Trentepohlia sp.).

The vegetation of North Fen at Esthwaite in 1967-9

1978 ◽  
Vol 200 (1140) ◽  
pp. 331-351 ◽  
Keyword(s):  
Open Water ◽  
Alnus Glutinosa ◽  
Quercus Petraea ◽  
Betula Pubescens ◽  
Ordnance Survey ◽  
The North ◽  
Order Of Magnitude ◽  
Carex Rostrata ◽  
Southward Extension ◽  
Rate Of Movement

The vegetation of part of the fen at the north end of Esthwaite Water (2° 59' W 54° 22' N) has been surveyed three times: in 1914-16, 1929 and 1967-9. The maps provide direct evidence of vegetational succession. The main associations have retained their identity throughout the period of half a century but the reed-swamp has advanced southward into open water and been replaced along its landward edge by fen dominated by Carex rostrata . Comparing the position of this boundary with that of the shore on the Ordnance Survey of 1848, the southward movement has been 47 m at the mouth of the inflow stream and 28 m in the middle of the basin. Comparing all the surveys it is clear that the rate of movement has varied from one period to another by an order of magnitude (0.2- 3.0 m/a). The most prominent change since 1929 has been the southward extension of woodland of Alnus glutinosa and Salix cinerea on the alluvial part of the fen, the recent spread of Betula pubescens and Farxinus excelsior and gradual extension of Alnus glutinosa into the sedge-fen. A few saplings of Quercus petraea are now established beneath dying trees of Betula pubescens in the oldest part of the carr. Analytical and experimental evidence suggest that the vegetation may also be changing in response to an increased input of phosphate and nitrate.

Isotopically labelled water - A valuable tracer to track initiation and progress of bud dormancy in temperate trees

2021 ◽  
Author(s):  
Manuel Gabriel Walde ◽  
Matthias Saurer ◽  
Yann Vitasse
Keyword(s):  
Progressive Increase ◽  
Quercus Petraea ◽  
Acer Pseudoplatanus ◽  
Tilia Cordata ◽  
Winter Dormancy ◽  
Carpinus Betulus ◽  
Complex Interactions ◽  
Temperate Trees ◽  
Quantitative Changes ◽  
Track Initiation

<p>Leaf-out of deciduous trees is regulated by a set of environmental factors such as cool temperatures during winter-dormancy (chilling), warm spring temperatures (forcing), and daylength (photoperiod), with complex interactions between these factors. Teasing apart these different factors in situ is challenging as no visible changes occurs during the dormancy phase. Manipulating these factors in climate chamber experiments may overcome this issue but may not reflect how they truly interact in natural conditions. Previous researches suggested that bud meristems are disconnected from the xylem flow during endodormancy and that the connection become progressively restored once exposed to a certain duration of chilling. Here we developed a new method using isotopically labelled water (D<sub>2</sub>O) to quantify the amount of water that can reach buds during the whole dormancy till budburst for 5 different species (<em>Acer pseudoplatanus</em>, <em>Carpinus betulus</em>, <em>Fagus sylvatica</em>, <em>Quercus petraea</em>, <em>Tilia cordata</em>).</p><p>In detail, we harvested twig cuttings from leaf fall to budburst (~every two weeks, 12 times) of these species from two different sites (about 5°C of difference) and placed them into labelled water during 24 h at constant light and 20°C. Buds were then cut and water content extracted to quantify δD. Thus, tracing back the water flow into the buds by the amount of D<sub>2</sub>O taken up. In parallel a subset of twigs was left in the room at 20°C to assess the time to budburst as a proxy for dormancy depth. Analyses of the data are ongoing and preliminary results show progressive increase of water uptake after induction of winter dormancy until budburst as chilling duration increased. Further, we also found distinct differences between species whereas <em>Carpinus betulus</em> showed the highest and <em>Tilia cordata </em>the lowest label uptake during winter dormancy. Furthermore, individuals growing at higher elevation took up less label indicating a stronger dormancy at lower winter temperatures. In summary, we think that our method seems a valuable tool to track quantitative changes in dormancy depth of temperate species especially, in combination with investigations on the molecular level such as sugars or hormones during winter-dormancy.</p>

scholarly journals No preferential carbon-allocation to storage over growth in clipped birch and oak saplings

2020 ◽  
Vol 40 (5) ◽  
pp. 621-636
Author(s):  
Sara Palacio ◽  
Eric Paterson ◽  
Alison J Hester ◽  
Salvador Nogués ◽  
Gladys Lino ◽  
...  
Keyword(s):  
Carbon Allocation ◽  
Soluble Sugars ◽  
Quercus Petraea ◽  
Fine Root Biomass ◽  
Betula Pubescens ◽  
C Storage ◽  
C Cycling ◽  
Betula Pubescens Ehrh ◽  
Different Response ◽  
Diffuse Porous

Abstract Herbivory is one of the most globally distributed disturbances affecting carbon (C)-cycling in trees, yet our understanding of how it alters tree C-allocation to different functions such as storage, growth or rhizodeposition is still limited. Prioritized C-allocation to storage replenishment vs growth could explain the fast recovery of C-storage pools frequently observed in growth-reduced defoliated trees. We performed continuous 13C-labeling coupled to clipping to quantify the effects of simulated browsing on the growth, leaf morphology and relative allocation of stored vs recently assimilated C to the growth (bulk biomass) and non-structural carbohydrate (NSC) stores (soluble sugars and starch) of the different organs of two tree species: diffuse-porous (Betula pubescens Ehrh.) and ring-porous (Quercus petraea [Matt.] Liebl.). Carbon-transfers from plants to bulk and rhizosphere soil were also evaluated. Clipped birch and oak trees shifted their C-allocation patterns above-ground as a means to recover from defoliation. However, such increased allocation to current-year stems and leaves did not entail reductions in the allocation to the rhizosphere, which remained unchanged between clipped and control trees of both species. Betula pubescens and Q. petraea showed differences in their vulnerability and recovery strategies to clipping, the ring-porous species being less affected in terms of growth and architecture by clipping than the diffuse-porous. These contrasting patterns could be partly explained by differences in their C cycling after clipping. Defoliated oaks showed a faster recovery of their canopy biomass, which was supported by increased allocation of new C, but associated with large decreases in their fine root biomass. Following clipping, both species recovered NSC pools to a larger extent than growth, but the allocation of 13C-labeled photo-assimilates into storage compounds was not increased as compared with controls. Despite their different response to clipping, our results indicate no preventative allocation into storage occurred during the first year after clipping in either of the species.

scholarly journals ŠUMSKA VEGETACIJA TREŠNJIKA KOD BANJE LUKE

2017 ◽  
Vol 1 (25) ◽  
Author(s):  
Miloš Miletić ◽  
Đorđije Milanović ◽  
Vladimir Stupar ◽  
Jugoslav Brujić
Keyword(s):  
Fagus Sylvatica ◽  
Natura 2000 ◽  
Quercus Petraea ◽  
Vaccinium Myrtillus ◽  
Carpinus Betulus ◽  
Tilia Tomentosa

Rad obrađuje šumsku vegetaciju potencijalnog Natura 2000 područja „Trešnjik” na Starčevici kodBanje Luke. Iako područje leži nadomak glavnog grada Republike Srpske, šumska vegetacija do sadanije bila istraživana. Istraživanje je ukazalo na veliki diverzitet šumskih staništa na relativno malomprostoru. Utvrđeno je ukupno sedam stanišnih tipova, klasifikovanih u dvije ekološki i florističkijasno definisane grupe: (i) Grupa stanišnih tipova bukovih šuma: (1) stanišni tip Athyrium filix-femina-Fagus sylvatica (čiste šume bukve); (2) stanišni tip Fagus sylvatica-Tilia tomentosa (šume bukvei srebrnolisne lipe); (3) stanišni tip Quercus petraea-Tilia tomentosa (degradacija prethodnog tipa,sa dominacijom lipe); (ii) Grupa stanišnih tipova kitnjakovih šuma: (4) stanišni tip Carpinus betulus-Quercus petraea (klimatogena šuma kitnjaka i graba); (5) stanišni tip Vaccinium myrtillus-Quercuspetraea (acidofilna kitnjakova šuma); (6) stanišni tip Carpinus orientalis-Quercus petraea (termofilnekitnjakove šume); (7) stanišni tip Fraxinus ornus-Carpinus orientalis (šikare bjelograbića i crnogjasena).

scholarly journals Comparison of habitats of the rare fungus Pluteus fenzlii between Białowieża Virgin Forest (Poland) and thermophilous forests (Slovakia)

2019 ◽  
Vol 64 (1) ◽  
pp. 101-110
Author(s):  
Tomáš Kučera ◽  
Vladimír Kunca ◽  
Jan Holec
Keyword(s):  
Quercus Robur ◽  
Natura 2000 ◽  
Quercus Petraea ◽  
Oak Forests ◽  
Tilia Cordata ◽  
Carpinus Betulus ◽  
Virgin Forest ◽  
Closed Canopy ◽  
Turkey Oak ◽  
Priority Habitat

AbstractPluteus fenzlii is a rare Eurasian lignicolous fungus, an iconic bright yellow species that attracts attention. Its habitat in the Białowieża Virgin Forest, Poland, is dominated by Carpinus betulus with admixture of Quercus robur, Tilia cordata and Picea abies, with an herb layer typical for the Carpinion betuli alliance. In Slovakia, the country hosting the highest number of localities worldwide, P. fenzlii prefers closed canopy of thermophilous forest with dominance of Quercus cerris and adjacent Quercus robur agg., Q. petraea agg., Carpinus betulus and Tilia cordata. In the Natura 2000 classification this vegetation belongs to habitat 91M0, Pannonian-Balkanic Turkey Oak-Sessile Oak forests, and priority habitat 91G0, Pannonic woods with Quercus petraea and Carpinus betulus. The Slovak localities can be assigned to the mycosociological community Boleto (aerei)–Russuletum luteotactae, typical for thermophilous oak forests of Southern Europe and extrazonal areas in Central Europe. The presence of P. fenzlii at the isolated Białowieża locality could represent either a remote site of its present occurrence or a remnant of its former distribution, connected with the relict occurrence of thermophilous vegetation in Białowieża where continental oak forests have already disappeared.

Millipede (Diplopoda) communities in an arboretum: Influence of tree species and soil properties

Biologia ◽  
2012 ◽  
Vol 67 (5) ◽  
Author(s):  
Slavomír Stašiov ◽  
Adela Stašiová ◽  
Marek Svitok ◽  
Eva Michalková ◽  
Branko Slobodník ◽  
...  
Keyword(s):  
Species Richness ◽  
Tree Species ◽  
Abies Alba ◽  
Larix Decidua ◽  
Betula Pubescens ◽  
Populus Nigra ◽  
Alnus Incana ◽  
Forest Stands ◽  
Carpinus Betulus ◽  
Ulmus Laevis

AbstractThe paper deals with the influence of tree species on millipede communities (Diplopoda). The research was carried out in nine sites in the Borová hora arboretum (Zvolen town, Central Slovakia). Each studied site represents a monoculture of one of nine tree species: Betula pubescens Ehrh., Pinus sylvestris L., Larix decidua Mill., Carpinus betulus L., Abies alba Mill., Picea abies (L.) Karst., Alnus incana (L.) Moench, Populus nigra L., Ulmus laevis Pall. Millipedes were collected by pitfall trapping during vegetation periods in 2008-2011. In total, 1064 individuals of 17 species and 7 families were obtained. The results of research confirmed (i) an influence of tree species on the composition of millipede communities, (ii) a significant influence of soil nitrogen on the species richness and biodiversity, and (iii) an impact of soil pH on the species composition of these terrestrial invertebrate communities. In terms of total dynamic activity and species richness of millipedes, the most favourable conditions were revealed in the forest stands of Alnus incana, Populus nigra, Ulmus laevis and Carpinus betulus. On the contrary, the least favourable biotopes were (from both points of view) the forest stands of Betula pubescens and Larix decidua.

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