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Ecoterra, No. 12, pp. 6-7, 2007

Iustinian Petrescu
Universitatea Babeş-Bolyai din Cluj-Napoca, Facultatea de Ştiinţa Mediului

Abstract: Ferns’ history developed during a long period of time: Upper Silurian (-425 MA) till present time. It is considered that in the upper Paleozoic (Carbonaceous-Permian) the evolution peak of the ferns took place, when the domination of the arborescent ferns, having a important role in the superior coal genesis (pit coal), also happened. During the Mesozoic Era, the ferns regressed, but some species still continued to be well represented. This regress was accentuated also in the Tertiary. In the present day forests (especially in the tropical-wet ones) the families Cyatheaceae and Dicksoniaceae still have representatives.  
Key words: ferns, evolution, forest

Ecoterra, No. 12, pp. 8-9, 2007

Sergiu MIHUŢ
S.C. USI S.R.L. Cluj-Napoca

Abstract: Since old times, man was looked for confort in Nature. He surrounded his territory with green areas empirically ensurring an „ecological territory” providing relief. Therefore for some of its properties he procedeed in the same manner. Whether there were green courtains, heddges or what are we are calling now “ecological corridors” these structures proove their direct benefits assiting in a better understanding of Nature. Their significance is even more relevant in economy and ecology. In the following episodes we will tackle this arguments.
Key words: ecology, corridor, economy, environment

Ecoterra, No. 12, p. 10, 2007

Nicolae GUDEA
Universitatea Babeş-Bolyai din Cluj-Napoca, Facultatea de Ştiinţa Mediului

Abstract: Certain problems of ecology, respectively the ones concerning the report between human beings and nature originate in human activities or natural disasters which had taken place in ancient times. Starting from a case study: Roman Dacia (106-275 A.D.) the author foresbadows some aspects of human activity against environment (stone exploitation, wood cutting, the extension of farming, the extension of soil exploitation) which had brought about important changes of the relief, in the world of plants and animals. The work constitutes a start of pleading for the study of archaeo-ecology.
Key words: ecology, human impact, exploitation, archeology

Ecoterra, No. 12, pp. 14-15, 2007

Universitatea Babeş-Bolyai din Cluj-Napoca, Facultatea de Ştiinţa Mediului

Abstract: The paper presents technological and biological methods and strategies successfuly used on the ecological reconstruction. Special attention is poid to the data regarding wood and herbaceous vegetation colonising the devastated ecosystems and anthropic wastes relief forms, the mining dumps, the technogenic soils and agricultural spoils fields etc., the advantages that the ecological reconstruction can offer in regional environmental sustainable development.
Key words: ecological reconstruction, vegetation, anthropic impact, sustainable development

Ecoterra, No. 12, p. 20, 2007

Universitatea din Pécs, Ungaria
Universitatea din Miskolc, Ungaria

Abstract: Exploitation of pitcoal deposits in the Mecsek Mountains dates back from 1780 and has been enhanced in the 19th and 20th century. After 1989, most of the low-efficiency mines have been closed. In this paper there are mentioned some negative effects of mining upon the build environment in Pécs town (field subsidence and sliding, structures breakage and damages, etc.).
Key words: pitcoal, mining, built environment, impact

Ecoterra, No. 12, p. 21, 2007

Rodica CIURTE, Ildiko VARGA
Universitatea Babeş-Bolyai din Cluj-Napoca, Facultatea de Ştiinţa Mediului

Abstract: In this paper are presented some practical issues in environmental protection in some areas in Salaj county, which establish the object of coal mining in past (lignite and brown coal). Are also mentioned the measures of ecological reconstruction in tree mining areas: Cristoltel, Testioara and Chiesd.
Key words: protected area, environment, geology, coal mining

Ecoterra, No. 12, pp. 22-23, 2007

Cristian MALOŞ
Universitatea Babeş-Bolyai din Cluj-Napoca, Facultatea de Ştiinţa Mediului

Abstract: As a result of our country’s geographical position and variety of natural conditions, Romania is the only european country which includes five biogeographic regions inside it’s borders. Situated in the center of the country, Târnavelor Tableland has suffered influences from several neighboring regions. Because of the characteristic geology, morphology and climatic conditions, Târnavelor Tableland includes  a large variety of habitats and flora. The sudden southern slopes are the perfect habitat for xeric species while more gentle northern slopes are covered with forests or crops. This results in a highly heterogenic landscape with forest, steppes and small villages.
Key words: biogeography, vegetation, Târnavelor Tableland

Ecoterra, No. 12, pp. 24-25, 2007

S.C. VITAL S.A. Baia-Mare

Abstract: The paper presents a comparative study regarding the quality of the raw water from the Firiza Lake with the quality of the drinking water resulted from the treated station using in the treated process aluminium sulphate like coagulation reagent and calcium hydroxide like alkalisation reagent.
Key words: drinking water, treatment plant, raw water, Firiza Lake

Ecoterra, No. 12, pp. 34-35, 2007

Universitatea TRANSILVANIA Braşov
S.C. ICPE Bistriţa S.A.
IFIN HH Bucureşti
Constantin COSMA
Universitatea Babeş-Bolyai din Cluj-Napoca, Facultatea de Ştiinţa Mediului

Abstract: The existence or radon in air over a certain concentration has negative effects on human health. There are diverse equipments for measuring the radon level in the air. In this article the authors discuss about the measuring of radon’s air concentration through integration method. This method has some advantages and disadvantages, which are all presented in the article.
Key words: Radon, measuring method, data acquisition, environment, health

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