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Browsing Articole by Author "Agapi, Ion"

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    Assessement of plant species diversity in deciduous forests In the context of climate change [Articol]
    (USARB, 2017) Agapi, Ion
    During recent years, biodiversity and its assessment have occupied an important position in the International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests), and Climate Change. The main component of forest ecosystems, in addition to tree edificators, is the ground vegetation. The individual vegetation layers comprise an important feature of the overall biodiversity of forest ecosystems. Their composition, diversity and structure constitute both important factors in the assessment of their biodiversity and also important bioindicators of environmental changes. Vegetation is a source of the primary production of ecosystem; it controls gas exchange with the atmosphere and plays an important role in the biocycles of both water and nutrients within the ecosystem. It is also an important indicator of the status of forest ecosystems for the relatively easy and inexpensive assessment of ground vegetation monitoring and constitutes an acknowledged basis for biodiversity assessment.
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    Unele aspecte ecologice ale speciilor de stejar din Republica Moldova [Articol]
    (USARB, 2017) Grigoraş, Nicolae; Florenţă, Gheorghe; Agapi, Ion
    Knowing the importance and value of oak species from the national forest fund, were analyzed the requirements of native oak species (Quercus robur, Q. petraea, Q. pubescens) towards various physico-geographic parameters, with the purpose of identifying the limits and the optimal niches for their development. It was identified that the most demanding oak species to substrate conditions and climatic parameter values are Quercus petraea and Quercus robur, toward Quercus pubescens which is more tolerant to high annual average temperatures, and little rainfall. This explains the future trends of Quercus pubescens which in the context of climate aridization, can easily adapt to the drought and occupy new sectors, in the detriment of the Quercus robur and Quercus petraea species.