Light trapping is the most widely used tool for determining the diversity of nocturnal Lepidoptera, but UV LEDs have yet to be used as light sources for the large-scale monitoring of Lepidoptera. We assessed the efficiency of this novel light source for sampling moths using a Heath type moth equipped with a strip of 150 high brightness UV LEDs (emission peak 398 nm, ~ 15 W) powered by a 12 V battery. We compared the number of individuals, the number of species and the Geometridae / Noctuidae ratio recorded for the samples collected using UV LED traps with those collected in two monitoring programs carried out in the same geographic region using two different light sources: a 200 W incandescent lamp (Rothamsted trap) and a 160 W mercury vapour lamp (manual catch). The total catch consisted of 61,120 individuals belonging to 699 species. The species richness rarefaction curves revealed that the Rothamsted trap collected fewer species and individuals than UV LED traps. Furthermore, the median numbers of species and individuals caught by UV LED traps fell within the range of those caught by mercury vapour lamp traps. In addition, the community composition recorded using incandescent lamps and UV LEDs was similar. The data obtained using UV LED traps, in absolute terms and in comparison with the other light sources and different sampling methods, clearly reveal that this light source is suitable for sampling macro-moth communities. For field work UV LEDs have many advantages, as they are resistant to mechanical damage, easily protected from heavy rain and energy efficient., Marco Infusino, Gunnar Brehm, Carlo Di Marco, Stefano Scalercio., and Obsahuje bibliografii
Morphological, anatomical, and physiological leaf traits of Corylus avellana plants growing in different light conditions within the natural reserve "Siro Negri" (Italy) were analyzed. The results highlighted the capability of C. avellana to grow both in sun and shade conditions throughout several adaptations at leaf level. In particular, the more than 100% higher specific leaf area in shade is associated to a 44% lower palisade to spongy parenchyma thickness ratio compared with that in sun. Moreover, the chlorophyll (Chl) a to Chl b ratio decreased in response to the 97% decrease in photosynthetic photon flux density. The results highlighted the decrease in the ratio of Chl to carotenoid content, the maximum PSII photochemical efficiency, and the actual PSII photochemical efficiency (ΦPSII) associated with the increase in the ratio of photorespiration to net photosynthesis (PN) in sun. Chl a/b ratio was the most significant variable explaining PN variations in shade. In sun, PN was most influenced by the ratio between the fraction of electron transport rate (ETR) used for CO2 assimilation and ETR used for photorespiration, by ΦPSII, nitrogen content per leaf area, and by total Chl content per leaf area. The high phenotypic plasticity of C. avellana (PI = 0.33) shows its responsiveness to light variations. In particular, a greater plasticity of morphological (PIm = 0.41) than of physiological (PIp = 0.36) and anatomical traits (PIa = 0.24) attests to the shade tolerance of the species., R. Catoni, M.U. Granata, F. Sartori, L. Varone, L. Gratani., and Obsahuje bibliografii
This paper presents the preliminary results of the study of the Early Neolithic pottery production in the Marche region, Italy (VI mill. BC). The main goal of this research is to expand the knowledge of pottery manufacturing processes associated to the typical Central Adriatic Impressed Ware, at present poorly understood. All sites under analysis are located in the piedmont hills of the Apennine Mountains, except one which is on the coast. This study aims to highlight synchronic and diachronic variability in pottery technology, to identify common traits and to investigate the raw materials selection and exploitation strategies. The pottery assemblages are examined by means of an integrated approach which include techno-typological and archaeometric analyses. The environmental factors, the distribution of resources, the technology solutions taken by these early Neolithic communities are considered. and Článek předkládá předběžné výsledky studia časně neolitické výroby keramiky v oblasti Marche, Itálie (6. tisíciletí př. Kr.). Hlavním cílem tohoto výzkumu bylo rozšířit dosud sporé znalosti o keramických výrobních postupech spojených s typickou středojadranskou keramikou impresso. Všechny zkoumané lokality se nacházejí v předhůří Apenin, kromě jedné, která leží na pobřeží. Cílem studia je upozornit na synchronní a diachronní variabilitu keramické technologie, určit společné prvky a zkoumat výběr surovin a těžební strategie. Keramické soubory byly zkoumány jednotným postupem zahrnujícím techno-typologické a archeometrické analýzy. V potaz byly brány i přírodní prostředí, rozmístění zdrojů a technologická řešení, která sledované časně neolitické komunity volily.
Článek se pokouší kriticky zhodnotit tezi hledající impuls ke vzniku pozdně laténských oppid v severní Itálii, v regionu Emilia-Romagna, kde ve 4. – poč. 2. stol. př. Kr. sídlil keltský kmen Bojů. Po shrnutí dostupných pramenů, písemných i archeologických, vztahujících se k dané oblasti a období, přistupuje k jejich interpretaci z hlediska dané problematiky a ke komentování diskuse, jež k tématu probíhala v italské archeologii. Na podporu teze není shledán dostatek argumentů ani ve výpovědi písemných pramenů, ani v dostupném nálezovém fondu. and The article evaluates critically a theory searching for the impulse for the emergence of late La Tène opppida in the north Italian region of Emilia Romagna, where the Celtic tribe of Boii is reported to have dwelt in the 4th - early 2th centuries B.C. After summarising both written and archeological sources for the period and region in question, its interpretation is approached in light of this evidence and subsequently of discussions on the problem which are taking place in Italian archaeology. The theory is found to be insufficiently backed by both written sources and by archaeological evidence.
Článek zkoumá předpoklady hypotézy, podle níž několik keramických fragmentů ze středočeských oppid imituje tvary středomořské keramiky. Dosud aktuální názor na problematiku je shledán sporným z důvodu chronologických či formálních nesrovnalostí a je poukázáno na meze úvah o formální imitaci. Namísto nich je u většiny fragmentů středomořský vliv shledáván nanejvýš ve funkční inspiraci. V případě jednoho fragmentu by o imitaci bylo možno uvažovat jen v případě jeho datace do raně laténského období. and The article reconsiders the premises of a hypothesis according to which several pottery sherds found in the late La Tène oppida in central Bohemia imitate Mediterranean ceramic forms. The idea of the formal imitation of concrete vase types is questioned on the grounds of chronological and formal inconsistencies. Instead of a problematic theory of formal imitation, functional inspiration is proposed as a more appropriate mechanism to explain the reception of the Mediterranean influence. In one case, only change of the object’s chronology (to the early La Tène period) could help it maintain its status of an imitation.