VOLUM OMAGIAL - Facultatea de Ştiinţe ale Naturii şi Ştiinţe Agricole

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Preliminary data on Meledic-Manzalesti Reserve... / Ovidius University Annals, Biology-Ecology Series 14: 61-66 (2010) „Meledic Plateau” Reserve is situated in the sub- Carpathians Mountains, in the Lopãtari Dingle and in the Slãnic river superior basin (tributary streamof Buzãu river) (latitude N 45 ο 29’ 49” and longitude of E 26 ο 37’ 16”). The reserve has a length of 1.7 km, on the North- South axis and 1.2 km on the West-East direction, holding a total surface of 157 hectares, the plateau being situated at an altitude between 400m and 600m. In the Eastern side, the delimitation is determined by the Jgheab river (a tributary stream of the Slãnic river), North of the Meledic stream and West of the Sãrat stream, the latter tributary stream of the Jgheab Valley, which emptyes into the Sãrat stream in turn. Out of these rivers and streams only the Meledic stream has fresh water, the other streams being also alimented with salty springs, their water having a brackish taste. Relief The Meledic Plateau Slopes are very abrupt, allowing sometimes to see the structure of the plateau represented by a layer of clay and shale on the upper side, with a thickness of 10 to 30 meters, under which there is the block of salt, tall up to a few hundred meters. The Meledic Reserve represents one of the most unprecedented places, the relief is expanding on the salt located on the surface or shallow depth, resulting one of the most interesting regions in our country. A very diversified terrain in shape and size develops because of the dissolution of salt on slopes (Fig.1, Fig.2). Fig.1. Aspect of the abrupt slopes in Plateau Meledic Reserve (south view) 62 Fig.2. Aspect of the abrupt slopes in Plateau Meledic Reserve (vest view) On the western side we can notice blocks of salt integrated in clay and salty shale, on which gaps and limestones have developed, in comparison with the southern side where vein of salt can be noticed even on the surface. Where the salty water rivers come out on the surface arises a rapid vaporisation of the water resulting in especially beautiful salt cristals. The plateau is located on the upper side of the reserve and is crossed by sinkholes, closed dingles, oval or round, with a diameter that can reach sometimes 40 m and a depth of 25 m, wider dingles results by their blending. On the bottom of such sinkholes, where the salt was covered with a denser layer of clay, freshwater lakes were formed, receiving water only from rain or snow meltdown. These lakes have karstic origins, all the underground springs are salt watered, the connection with these ending long time ago. The presence of freshwater lakes on a salt massif is considered a unique phenomenon. Soils In the Meledic reserve we encounter a large variety of soils. On the steep slopes, where the salt layers are very close to the surface or even on the surface, we find the white alkali. On the slopes where the water carries small amounts of silt the vertisols are formed, on heavy clay rocks (with high clay content). On the plateau we meet halomorphous soils, which have a high content of soluble salt, that occur on
Daciana Sava et al. / Ovidius University Annals, Biology-Ecology Series 14: 61-66 (2010) partially covered with sediment surfaces. A great diversity of halophile species develop here. In sinkholes where the sedimented clay have allowed the formation of lakes, the soils are hydromorphic, formed due to an excess of moisture, which can be permanent or temporary. In areas where the water has a permanent stagnation, the pseudogleic soil is formed. The plant species developing here are thermophilic. In forested areas we can find reddish brown forest soils, especially clay soils. In these areas we especially find Pontic or Mediterranean species. Climate The sub-Carpathians Mountains have a temperate-continental climate, with regional differences imposed by the shape of relief, but also by the position at the intersection of climate influences northwest, eastern and southern. Being located in a lowland area of the sub- Carpathians, the Meledic Plateau has a low hill climate with a tendency of aridity in summer. The average annual temperatures fit between 6 ο C and 8 ο C. The average annual temperature of the coldest month, January, is of 3 ο C, and of the hottest month, July, is of 18 ο C. The average annual rainfall is around 700-800 mm. The largest amount of rainfall is in May and June, and the driest months are September and October. 2. Material and Methods Field trips have been organized for the flora studies in the Meledic Reserve from Mânzãleşti: two trips in the months of May and June (months that have a rapid vegetation development), and in the months of April, July, August, September only one trip, through the years 2007-2008 to catch the different stages of vegetation (vernal and estival). After rating, we made up a floristic list, in which the plants have been placed in the right systematic units [1, 2, 3]. Based on this list, we made out: the systematic analysis of the vegetation, the bioform spectrum, the geoelements spectrum, the spectrum for ecological preferences: humidity, temperature and soil reaction [4, 5]. 63 3. Results and Discussions Due to the field trip a total of 133 taxa were registered. The following taxa were identified in the study area: Acer campestre L. Ph (MM); Eur.; U2,5 T3 R3, Achillea millefolium L. H; Euras.; U4 T3 R0 , Adonis aestivalis L. Th; Euras; U3T4 R3, Agrimonia eupatoria L. H; Euras.; U2,5 T3 R4, Ajuga genevensis L. H; Euras.; U2,5 T3 R4 , Alisma plantago-aquatica L. HH; Cosm.; U6 T0 R0, Alnus incana (L) Moench Ph (MM); Eur.;U4 T2 R4, Alnus viridis (Chaix.) DC Ph (MM);Alp.-eur;U3,5 T2,5R3, Anchusa officinalis L. limba boului); TH; Eur.; U2 T3,5 R0, Anemone nemorosa L. G; Eur; U3,5 T4 R0, Anemone ranunculoides L. G; Eur; U3,5 T3 R4, Artemisia vulgaris L. H; Circ.;U3 T3 R4, Astragalus onobrychis L. H; Euras.; U1,5 T3,5R4,5, Ballota nigra L. Th; Centr. Eur.); U3 T3,5 R0, Betonica officinalis L .(Stachys officinbalis L.) H; Euras.; U3 T3 R3, Brassica rapa L.Th; Med; U3 T3 R4, Campanula rapunculoides L. H; Euras.; U3 T2 R0, Capsela bursapastoris Medicus Th; Cosm; U3 T0 R0, Carex digitata L. H; Euras.; U3 T3R3, Carum carvi L. TH; Euras.; U3,5 T3 R3, Centaurea spinulosa Roch. H; Centr. Eur.; U2,5 T0 R3, Centaurea nervosa Willd. H; Alp.-eur.;U3 T0 R3; Centaurium umbellatum Gilib. Th; Centr.eur.;U3 T3 R2, Chaerophyllum bulbosum L. TH; Centr. Eur; U4 T3,5 R4,5, Chrysanthemum leucanthemum L. H; Euras.; U 3T3,5 R3, Chrysanthemum corymbosum L. H; Euras.; U3 T3 R3, Clematis vitalba L. Ph ; Centr. Eur.; U3 T3 R3, Colchicum autumnale L. G; Eur; U3,5 T3 R4, Coronilla varia L. H; Centr. Eur.; U2 T3 R4, Cornus mas L. Ph (M); Pont. medit.; U2 T3,5 R4, Cornus sanguinea L. Ph (M);Centr. Eur); U3 T3 R4, Corylus avellana L. Ph (M); Eur.; U3 T3 R3, Crataegus monogyna Jacq. Ph (M); Euras.;U2,5 T3 R3, Cytisus hirsutus L. Ph (N); Centr. Eur.; U2,5 T3 R2, Daucus carota L. TH; Euras.; U2,5 T3 R0, Delphinium consolida S.F.Gray (Consolida regalis) Th; Euras; U3 T4 R4, Diplotaxis muralis L. Th; Centr. Eur; U2,5 T3,5 R4, Draba verna Chevall Th; Euras; U2,5 T3,5 R0, Echium vulgare L. TH; Euras.; U2 T3 R4, Elaeagnus angustifolia L. Ph (M); Euras; U0 T3 R4,5, Epipactis atropurpurea Raf G; Euras.; U2 T0 R4,5, Equisetum arvense L. G.; Cosm.; U3 T3 R0, Erigeron canadensis L. Th; Adv.; U2,5 T0 R0, Eryngium campestre L. H; Pont. medit.; U1 T5 R4 , Euphorbia cyparissias L. H; Eur.; U2 T3 R4, Euphrasia rostkoviana Hayne. Th; Centr. Eur.; U3 T3 R3, Fagus sylvatica L. Ph (MM); Centr. Eur.; U3 T3 R0, Festuca pratensis Hudson H; Euras; U3,5 T0 R0, Ficaria verna L. (Ranunculus ficaria Huds.) H;Euras: U3,5
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Gavril Negrean/ Ovidius University
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Body size variation in Rana tempoar
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VOLUM OMAGIAL - Facultatea de Ştiinţe ale Naturii şi Ştiinţe Agricole

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