cave hygropetric beetles and their feeding behaviour a comparative study of cansiliella servadeii and hadesia asamo coleoptera leiodidae cholevinae leptodirini

Several Leptodirini beetles (Leiodidae) are known to dwell in hygropetric habitats where films of water run down the cave walls, but observations of their behaviour are lacking. The ultra- specialised hygropetricolous beetles belonging to the genera Cansiliella and Hadesia are biogeographically and phylogenetically unrelated leptodirines. As the species of the former genus are known to be associated with the moonmilk deposits our study aimed to obtain data on their foraging behaviour, as well as to compare the feeding strategies of both genera. In situ monitoring of C. servadeii from the cave Grotta della Foos (Italy) and H. asamo from Bravenik Cave (Bosnia and Herzegovina), was complemented by video recordings to ensure accurate results. Mouthparts and tarsi of both species were examined using scanning electron microscopy and compared with H. weiratheri from Montenegro to evaluate potential morphological adaptations to the hygropetricolous ecological niches. The three species had significantly different mouthpart morphologies, likely due to differences in semi-aquatic feeding strategies and overall ecology. A series of new observations on site movement and feeding behaviour are presented, compared and discussed. Key words: Coleoptera, ecology, behaviour, moonmilk, cave hygropetric. Primerjava jamskih higropetricnih hroscev in njihovegaprehranjevanja; Cansiliella servadeii in Hadesia asamo (Coleoptera, Leiodidae, Cholevinae, Leptodirini) Stevilni hrosci iz poddružine Leptodirinae (Leiodidae) so prilagojeni na življenje v posebnem habitatu »jamskem higropetriku «, t.j. tankem sloju tekoce vode, ki tece po sigi. Zaenkrat je njihovo vedenje se precejsnja neznanka. Visoko specializirani higropetricni vrsti Cansiliella servadeii in Hadesia asamo sta geografsko loceni in filogenetsko nesorodni. Ker je prva ocitno vezana na depozite mehke sige (t.i. jamsko mleko), smo želeli raziskati iskanje hrane pri tej vrsti ter primerjati strategijo hranjenja obeh vrst. Da bi povecali zanesljivost rezultatov, smo poleg in situ opazovanja C. servadeii iz jame Grotta della Foos (Italija) in H. asamo iz jame Bravenik (Bosna in Hercegovina), njuno vedenje tudi posneli. Z vrsticnim elektronskim mikroskopom smo raziskali obustne okoncine in stopalca obeh vrst in jih primerjali s H. weiratheri iz Crne gore, da bi preverili potencialne morfoloske prilagoditve na specificno ekolosko niso. Bistvene razlike v zgradbi ustnega aparata so najverjetneje posledica razlik v strategiji hranjenja, kot tudi razlicne splosne ekologije omenjenih vrst. V prispevku predstavljamo, primerjamo in razpravljamo o novih opažanjih povezanih z gibanjem in prehranjevanjem higropetricnih hroscev. Kljucne besede: Coleoptera, ekologija, vedenje, jamsko mleko, jamski higropetrik

Segments of Atmospheric 14C Change as Derived from Late Glacial and Early Holocene Floating Tree-Ring Series

From the 16th International Radiocarbon Conference held in Gronigen, Netherlands, June 16-20, 1997.We present results of 14C dating of several tree-ring series from the Late Glacial and Early Holocene, analyzed at the Heidelberg University radiocarbon laboratory. Although these are floating series, they contribute high-resolution information about the variability of atmospheric 14C during those periods.This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Segments of Atmospheric 14

From the 16th International Radiocarbon Conference held in Gronigen, Netherlands, June 16-20, 1997.We present results of 14C dating of several tree-ring series from the Late Glacial and Early Holocene, analyzed at the Heidelberg University radiocarbon laboratory. Although these are floating series, they contribute high-resolution information about the variability of atmospheric 14C during those periods.This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Atmospheric radiocarbon levels were highly variable during the last deglaciation

Abstract Radiocarbon dating provides a key chronological framework for studying past environmental changes. Raw radiocarbon ages measured in samples must be converted to calendar ages using an appropriate calibration curve. Tree-ring datasets provide the gold-standard for developing a precise curve of atmospheric radiocarbon levels over long-time scales. Here, we reconstruct atmospheric radiocarbon levels using a millennium-long section of tree-ring chronology segments that extend into the last glacial period. The samples were obtained from subfossil larch trees recovered from clay quarries at Revine, Italy. Our reconstruction shows higher variations in the amplitude of atmospheric radiocarbon between 18,475 and 17,350 calendar years before the present than that detected in the IntCal20 calibration curve. Comparing the new tree-ring based reconstruction with Beryllium-10 fluxes derived from ice cores, we hypothesise that these variations are driven by solar variability. Our results demonstrate the unique value of sub-decadal radiocarbon sequences derived from glacial tree-ring chronologies

Agricoltura conservativa - 8 anni di esperienze in Veneto

La pubblicazione raccoglie i risultati di una serie di Progetti svolti nell\u2019arco temporale 2011-2018 e in parte ancora in corso, condotti da Regione del Veneto, da Veneto Agricoltura e dall\u2019Universit\ue0 di Padova

Barcoding Eophila crodabepis sp. nov. (Annelida, Oligochaeta, Lumbricidae), a large stripy earthworm from alpine foothills of northeastern Italy similar to Eophila tellinii (Rosa, 1888)

none16A new Italian earthworm morphologically close to the similarly large and anecic Eophila tellinii (Rosa, 1888) is described. Distribution of Eophila crodabepis sp. nov. extends over 750 km2 from East to West on the Asiago Plateau and Vittorio Veneto Hills, from North to South on mounts Belluno Prealps (Praderadego and Cesen), Asiago, Grappa and onto the Montello foothills. This range abuts that of Eophila tellinii in northern Friuli Venezia Giulia region. Known localities of both E. tellinii and E.crodabepis sp. nov. are mapped. mtDNA barcoding definitively separates the new western species from classical Eophila tellinii (Rosa, 1888).nonePaoletti, Maurizio G.; Blakemore, Robert J.; Csuzdi, Csaba; Dorigo, Luca; Dreon, Angelo Leandro; Gavinelli, Federico; Lazzarini, Francesca; Manno, Nicola; Moretto, Enzo; Porco, David; Ruzzier, Enrico; Toniello, Vladimiro; Squartini, Andrea; Concheri, Giuseppe; Zanardo, Marina; Alba-Tercedor, JavierPaoletti, Maurizio G.; Blakemore, Robert J.; Csuzdi, Csaba; Dorigo, Luca; Dreon, ANGELO LEANDRO; Gavinelli, Federico; Lazzarini, Francesca; Manno, Nicola; Moretto, Enzo; Porco, David; Ruzzier, Enrico; Toniello, Vladimiro; Squartini, Andrea; Concheri, Giuseppe; Zanardo, Marina; Alba Tercedor, Javie

Barcoding Cluster of <i>E</i>. <i>crodabepis</i> sp. nov. (in yellow) in relationship with <i>E</i>. <i>tellinii</i> (in red) corresponding to their geographical distributions.

<p>Barcoding Cluster of <i>E</i>. <i>crodabepis</i> sp. nov. (in yellow) in relationship with <i>E</i>. <i>tellinii</i> (in red) corresponding to their geographical distributions.</p