Romanian Journal of Biology - Zoology
ROMANIAN ACADEMY Institute of Biology - Bucharest
2009, VOLUME 54, no. 1
IN MEMORIAM – PETRU MIHAI BĂNĂRESCU
DIVERSITY AND SPECIES DISTRIBUTION OF ORIBATID MITES (ACARI-ORIBATIDA) IN A GEOGRAPHICAL AND ECOLOGICAL UNIQUE AREA OF SOUTHERN SWEDEN
Viorica Honciuc, Lars Lundqvist
The researches were realized in 8 sites of Kullaberg Reservation, from north to south in different types of habitats of vegetation and microhabitats. A number of 115 species and 1.335 individuals were identified. 3 genera and 27 species were recorded for the first time in Sweden. 88 species were indicated before in different ecosystems in Sweden and on the continent, and by these 49 species were specified only in the central and south of Sweden. 22 species were found with large distribution in this reservation especially in the litter of forests and in moss. A large number of oribatid species identified in these habitats have the Palearctic distribution, with European and North-American specification. As a saprophagous mite, the panphytophages present the greatest share, followed by the makrophytophages and mikrophytophages. By its unique geographical position and high diversity of vegetation Kullaberg Reservation is an ideal terrestrial complex of ecosystems for oribatid mites. The present high taxonomic diversity of the area is probably a consequence of the area historically being part of a wider diversified forest area.
INSECTS SPECIES RICHNESS AND ABUNDANCE IN DANUBE DELTA (ROMANIA)
Insect species in Letea natural forest (areas with trees and grass-covered, small forest areas with herbaceous plants), in grasslands and sand dune zones near Letea forest, in Caraorman and Sfiştovca artificial forests, in ecotonal zones of Caraorman forest (sand dune zones, leaf litter, zones with a lot of herbaceous plants), sand dunes in C. A. Rosetti locality, Sărăturile sand bank, zones with herbaceous plants of Matiţa, Crişani, Sulina, Tulcea localities neighborhoods, and in aquatic basins were investigated. Many insects were detected also in stomach content of 39 bird species, and of 1191 individuals of Rana ridibunda ridibunda Pallas frog. A number of 495 identified insect species belonging to 382 genera, 172 families and 18 orders was found. In some cases only genus levels were established.
DATA ON FEEDING AND NESTING OF SOME BEE SPECIES (HYMENOPTERA: MEGACHILIDAE, ANTHOPHORIDAE) IN ROMANIA
CRISTINA BAN-CALEFARIU, DANIELA ILIE
The present paper comprises a synthesis regarding the biology of some Megachilidae and Anthophoridae species from Romania, based on the data from literature, from the collections found in “Grigore Antipa” National Museum of Natural History and in “Bruckenthal” National Museum, and from our own samplings from different areas between the years 1995-1998 and 2003-2008. Among the 128 species identified, 60% of Megachilidae and 70% of Anthophoridae species are polilectics, representing the dominant category. In the paper are presented data on the nest and cells' type, as well as on the building material.
LEAF BEETLES (COLEOPTERA: CHRYSOMELIDAE) FROM PROTECTED NATURAL AREAS OF ROMANIA
The paper represents a new contribution to the knowledge of the leaf beetles fauna in nine natural reservations of Romania, situated in the Southern Carpathians, Eastern Carpathians and in the Danube floodplain area. A total of 64 species, from 32 genera, belonging to 9 subfamilies are reported. The presence of some mountainous species with distribution within the Alpine-Carpathian chain is recorded: Chrysolina hemisphaerica (Germar, 1817), C. marcasitica (Germar, 1824), C. umbratilis (Weise, 1887), Oreina virgulata (Germar, 1824), O. alpestris (Schumell, 1844), O. cacaliae (Schrank), O. intricata (Germar, 1824), Sclerophaedon carniolicus (Germar, 1824), Neocrepidodera corpulenta (Kutschera, 1860). The collecting sites are new records for the leaf beetles presence.
RHOPALOCERA (LEPIDOPTERA) OF THE NATURAL RESERVE „THE LIMESTONES OF MĂGURA HILL” (METALIFERI MOUNTAINS, WESTERN CARPATHIANS, ROMANIA)
SILVIA BURNAZ, CORNEL ALEXANDRU
During 1985-2007, the author undertook lepidopterological researches in one of the most spectacular natural reserves of Hunedoara County (Romania). This protected area, situated in the southern part of the Metaliferi Mountains, is known as “The limestones of Măgura Hill” and represents only a part of Crăciuneşti Gorges. At present, this area is included in the Site Natura 2000 known as “Băiţa Hills”. 88 species of Rhopalocera (Ord. Lepidoptera) have been recorded from this natural protected area. The checklist of the species is given. For each species, data about the preferred habitat, larval and adult food are given. Zerynthia polyxena, Euphydryas aurinia, Euphydryas maturna partiens, Maculinea arion, Maculinea alcon, Lycaena dispar rutila, Lycaena thersamon, Lycaena alciphron, considered as vulnerable or endangered species according to IUCN criteria, find here optimal conditions to live.
CORRELATION BETWEEN TYPE OF PEST POPULATION CONTROL (CHEMICAL, BIOLOGICAL, NATURAL) AND DEFOLIATOR LEPIDOPTEROUS POPULATION DYNAMICS
NELA MIAUTĂ, IRINA TEODORESCU
Our investigations, in 7 deciduous forests in Romania, 3 infested by Lymantria dispar L. and 4 by Tortrix viridana L., during 1997-2005, established a correlation between type of pest population control and defoliator population dynamics. The comparison between six forests, chemically (by inhibitory of chitin-synthesis and pyrethrin pesticides) or biologically (by viral and bacterial treatment) controlled, against one forest with natural control (by parasitoids, predators, pathogens) enables to assess the impact of control methods on the pests and entomophagous populations. Previous to chemical or biological treatments, the Lepidoptera defoliator populations were in a progradation, but after these interventions, the defoliator passed into the retrogradation. Bacterial and viral treatments was benefic, favoring the parasitoids and predators action. In forest without human intervention, defoliator populations were in latency, with innocuous effectives, missing defoliation action and with high parasitism degree.Our results underline the necessity to use the biological control methods.
BIOLOGICAL FEASIBILITY OF LABORATORY MAINTENANCE OF THE DEEP SEA HYDROTHERMAL MUSSEL Bathymodiolus azoricus FOR POST-CAPTURE PHYSIOLOGICAL INVESTIGATIONS AT ATMOSPHERIC PRESSURE
Harbouring endosymbiotic chemoautotroph bacteria is a typical strategy developed by macro-invertebrates at a variety of reducing marine habitats including deep sea hydrothermal vents, as an adaptation to the harsh conditions. Consequently, a prerequisite of their laboratory maintenance is having control on their endosymbiosis. The methodology used in post-capture manipulations on vent bivalves from various vents with special focus on Bathymodiolus azoricus from the Menez Gwen vent site of the Mid Atlantic Ridge (MAR) is reviewed. Evidence is provided for the continuing growth of endosymbionts in bacteriocytes, provided that inorganic nutrients, i.e. H2S for sulphur oxidizers and CH4 for methanotrophs, are supplied. Lack of hydrothermal gases, however, resulted in gradual disappearance of bacteria from bacteriocytes. Experimental conditions to maintain the hydrothermal vent bivalve for prolonged periods of time, using a range of discriminatory diets to support specific types of endosymbiotic bacteria are described. The potential of using this species as animal model in further physiological studies of the adaptations to extreme environments is discussed.
EPITHELIAL-STROMAL INTERACTIONS DURING TUMORIGENESIS AND INVASION PROCESS OF BASOCELLULAR AND SQUAMOUS CELL CARCINOMAS AT THE TUMOR-PERITUMORAL STROMA INTERFACE
NICOLAE MIRANCEA, DORINA MIRANCEA, FLORIN DANIEL JURAVLE, ANA-MARIA ŞERBAN, GABRIEL-VALERIU MIRANCEA
In this paper we focus our interest on the dynamics changes in the carcinomas phenotypes (basocellular carcinoma and squamous cell carcinoma), especially at the tumor-stroma interface corelated with the desmosomal and hemidesmosomal junctions as well as the basement membrane aspects during degradation in the process of tumor cells invasion. Our results showed that tumor cells from both carcinoma types are severely altered phenotypes of the cells they are originated from, but still keeping infrastructures which remember their epithelial origin. Moreover, peritumoral stroma also showed significant alterations. Basal tumor keratinocytes extend numerous and polymorphic cell protrusions which sometimes contain lysosome-like infrastructures which probably facilitate migration of basal keratinocytes by lytic degradation of precarious basement membrane. A drastic reduction of desmosomal junctions of basal tumor keratinocytes with adjacent cells as well as loss of hemidesmosomes increase the freedom of tumor epithelial cells which tend to grow invasively into the host tissue.
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