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Volume XI |

Invasive terrestrial plant species in the Romanian protected areas. Case study: Fallopia japonica in the Maramureş Mountains Natural Park

Abstract: Assessing invasive terrestrial plant species in protected areas is of major importance, taking into consideration the role they play as key drivers in conserving biological diversity. The paper is aiming to argue the Invasive Terrestrial Plant Species (ITPS) in the Romanian protected areas with a special focus on the species Fallopia japonica in the Maramures Mountains Natural Park. Fallopia japonica, also known as Polygonum cuspidatum or Reynoutria japonica is an herbaceous perennial plant, largely occupying the riparian ecosystems and causing serious damages to native vegetation. The species is broadly regarded as one of the most invasive plant species in Europe, also listed by the World Conservation Union as one of the world’s one hundred worst plant invaders. The paper seeks to analyze the potential spread of Fallopia japonica in a protected area-Maramures Mountains Natural Park – V IUCN category as well as Natura 2000 site (SPA and SCI) integrating comprehensive statistical and field data with modern computing methods (GIS-based). Consequently, based on accurate mapping and field investigation of Fallopia japonica in the study-area, the authors were able to identify specie’s main ecological requirements and preferences, spreading conditions etc. The current research will have great contribution to undertaking further studies on invasive terrestrial plant species development, distribution potential and impact upon native habitats.

Volume XI |

The Evaluation of Geomorphosites from the Ponoare Protected Area

Abstract: In the present paper we present a new method of evaluating the geomorphosite. The method is presented by us/ our team and it was tested in the protected area Ponoare. In the first part of the article, we will apply, for the geomorphosites inventorized here, the other methods of evaluation known worldwide, and after that we will evaluate geomorphosites by following the new method proposed by us, a method which is adapted to geomorphological reality and to the reality of touristic exploitation of the analysed area. There were taken into account the methods developed up to now in the specialized literature, namely: the method of evaluating the touristic value of geomorphosites for the evaluation of the touristic value conceived by J. P. Pralong in 2005, the method developed in 2007 by E. Reynard et al.; the method developed at the University of Modena and Reggio Emilia by P. Coratza and C. Giusti in 2005; and the method proposed at the University of Cantabria by V. M. Bruschi and A. Cendrero in 2005; the method developed by the University from Valladolid by E. Serrano and J. J. Gonzales Trueba in 2005; the method proposed by the University of Minho in 2007 by P. Pereira, the Greek method developed by N. Zourous in 2005 and the Slavonian method proposed in 2012 by B. Erhatic. The results obtained show different quantitative values compared to previous methods, but comparing the rank obtained by each geomorphosite during the evaluation, the rank stays the same. The values are situated in a different deviation compared to other methods, having in view that for additional values firstly the cultural value is reduced in the analysed area.

Volume XI |

Morphometric features of the river network from the Bârlad catchment

Abstract: After a brief presentation of the Bârlad catchment, the hydrographic network is analyzed using the Horton-Strahler classification system. From the amount of morphometric parameters, the drainage and the slope patterns are taken into consideration for the entire Bârlad catchment and for the 13 hydrometric stations in the catchment that have data on water flows and suspended sediments. From those there were chosen the Vaslui hydrometric station as representative for the geomorphologic units of the Bârlad catchment and the Feldioara hydrometric station for the Berheci catchment. Based on the analyzed patterns there were determined a series of morphometric parameters specific to the river network for all the 13 analyzed stations and from their comparison one can see obvious differences between the obtained values for the basins in the Central Moldavian Plateau and the ones in the Tutovei Hills.

Volume XI |

The Studineț Basin (Tutova Hills). Morphometric Indicators and Correlations

Abstract: The morphometric analysis doesn’t imply just the quantitative description of the relief, although it is frequently limited to it, but also a methodological approach that allows the typological classification of landforms and establishing some significant correlations between the selected parameters and other geomorphologic, geologic indicators etc. The testing and validation of such analyses is performed upon representative samples on different scales. This article aims to interpret some morphometric indicators and correlations within the Studineţ hydrographical basin (9669 ha), located in the central part of the Tutova Hills, in the eastern part of Romania. The region’s relief is grafted on sandy-clayey and clayey-loamy deposits from the Kersonian and Meotian, being characterized by a relatively high fragmentation for a hillyregion (Jeanrenaud, 1971, 1995). The maximum altitude gap ranges between 108.9 and 485.5 m, and the relief energy values facilitate morphodynamic imbalances expressed through different geomorphological processes. The main characteristic is the presence of cuestas with morphometric, morphodynamic and land use asymmetries. The present scientific approach analyzes every derived map by interpreting the unclassified rasters (pixel value) and the classified ones (class value), comparing the relevance of the results to obtain the optimal number of classes and to establish the limits that have the best geomorphological level of significance. Given the region’s features, the analysis of cuestas was favored to differentiate the cuesta fronts and backslopes. Finally, on a representative perimeter within the basin, the raster histograms (hypsometry, declivity, exposition) were compared, to highlight the differentiations caused by the map scale and pixel resolution.

Volume XI |

Changes in air temperature and precipitation and impact on agriculture

Abstract: Air temperature and precipitation are among the main factors for agricultural production. The aim of the present research work is to analyse changes in air temperature and precipitation in non-mountainous part of Southern Bulgaria in terms of the opportunities for the development of agriculture in the region. The trend in variability of seasonal and annual air temperature and precipitation is determined by the linear regression method. An analysis of the combination between air temperature and precipitation gives a tool to classify the climate according to dry and wet conditions of the territory. For this purpose the Gaussen-Bagnouls classification method is used in the present paper. In terms of air temperature, the investigated area is favourable for growing thermophilic plants. In order to investigate thoroughly the impact of climate change, the quantitative research has been complemented by a qualitative study – case study of farmers from the region of Stara Zagora. Case studies show that farmers are vulnerable to various degrees to the expected annual variability and average changes in yields depending on farm size, crop varieties and availability of irrigation.