12 Works

Optical Properties of Charged Polymer with Nano-sized Zeolite Inclusions

Temenujka Yovcheva, Izabela Naydenova, Ivanka Vlaeva, Rosen Todorov , Vincent Toal & Simeon Sainov

Cyrylickie ewangelie z XVI i XVII wieku ze zbiorów Biblioteki Kórnickiej

Marzanna Kuczyńska & Maya Ivanowa

Der Dryopteris affinis-Komplex (Dryopteridaceae)im Harz – Identifizierung, Verbreitung, Ökologie

Anton Bär, Wilfried Bennert, Hans-Jürgen Czichowski, Joerg Fuchs, Peter Gausmann, Daniella Ivanova, Wolfgang Jäger, Rainer Neuroth, Hjalmar Thiel, Rolf Thiemann & Günther Zenner
In Germany, the Dryopteris affinis complex has its main distribution in southern parts of the country, but also occurs in the Harz Mountains, the northernmost German low mountain range. From 2008 to 2018, the authors made a series of excursions into the Harz Mountains to study this group. To cor-rectly identify the taxa, samples were collected for flow cytometric analyses as well as micro- and macromorphological examinations. The following taxa and cytotypes were detected: D....

Data from: Disturbance history is a key driver of tree lifespan in temperate primary forests

Jakob Pavlin, Thomas A. Nagel, Marek Svitok, Joseph L. Pettit, Krešimir Begović, Stjepan Mikac, Abdulla Dikku, Elvin Toromani, Momchil Panayotov, Tzvetan Zlatanov, Ovidiu Haruta, Sorin Dorog, Oleh Chaskovskyy, Martin Mikoláš, Pavel Janda, Michal Frankovič, Ruffy Rodrigo, Ondřej Vostarek, Michal Synek, Martin Dušátko, Tomáš Kníř, Daniel Kozák, Ondrej Kameniar, Radek Bače, Vojtěch Čada … & Miroslav Svoboda
AIMS We examined differences in lifespan among the dominant tree species (spruce (Picea abies (L.) H. Karst.), fir (Abies alba Mill.), beech (Fagus sylvatica L.), and maple (Acer pseudoplatanus L.)) across primary mountain forests of Europe. We ask how disturbance history, lifetime growth patterns, and environmental factors influence lifespan. LOCATIONS Balkan mountains, Carpathian mountains, Dinaric mountains. METHODS Annual ring widths from 20,600 cores from primary forests were used to estimate tree life spans, growth trends,...

Data from: Postglacial determinants of regional species pools in alpine grasslands

Borja Jiménez-Alfaro, Wolfgang Willner, Eszter Ruprecht, Kiril Vassilev, Nevena Kuzmanovic, Renata Ćušterevska, Djordjije Milanovic, Josef Sibik, Sylvain Abdulhak, Angela Stanisci, Maria Luisa Carranza, Ariel Bergamini, Corrado Marcenó & Gianpietro Giusso Del Galdo
Aim: Alpine habitats support unique biodiversity confined to high-elevation areas in the current interglacial. Plant diversity in these habitats responds to area, environment, connectivity and isolation, yet these factors have been rarely evaluated in concert. Here we investigate major determinants of regional species pools in alpine grasslands, and the responses of their constituent species groups. Location: European mountains below 50ºN. Time Period: Between 1928 and 2019. Major Taxa Studied: Vascular plants. Methods: We compiled species...

Two soliton interactions of BD.I multicomponent NLS equations and their gauge equivalent

Vladimir Gerdjikov & Georgi Grahovski

Integrability, Recursion Operators and Soliton Interactions

Boyka Aneva, Georgi Grahovski, Rossen Ivanov & Dimitar Mladenov

Регионални аспекти на депопулацията и стареенето на населението и трудовите ресурси на България в началото на ХХІ век

Nikolay Tsekov
Депопулацията и стареенето на населението са основните фактори, които предопределят изменението на демографската ситуация в България през последните три десетилетия. Цел на настоящата разработка е да се изследва въздействието на синергията на тези негативни процеси върху развитието на страната посредством измененията в повъзрастовото разпределение на цялото население и населението в трудоспособна възраст за страната и по общини. Обект на изследването са взаимовръзките между средногодишните темпове на изменение на броя на населението на българските общини и...

Ancestral sperm ecotypes reveal multiple invasions of a non-native fish in northern Europe

Leon Green, Apostolos Apostolou, Ellika Faust, Kajsa Palmqvist, Jane W. Behrens, Jonathan N. Havenhand, Erica H. Leder & Charlotta Kvarnemo
For externally fertilising organisms in the aquatic environment, the abiotic fertilisation medium can be a strong selecting force. Among bony fishes, sperm are adapted to function in a narrow salinity range. A notable exception is the family Gobiidae, where several species reproduce across a wide salinity range. The family also contains several wide-spread invasive species. To better understand how these fishes tolerate such varying conditions, we measured sperm performance in relation to salinity from a...

Pontocaspian habitat polygon shapefiles from: Decline of unique Pontocaspian biodiversity in the Black Sea Basin: a review

Aleksandre Gogaladze, Mikhail Son, Matteo Lattuada, Vitaliy Anistratenko, Vitaly Syomin, Ana Bianca Pavel, Oana Popa, Luis Popa, Jan-Johan Ter Poorten, Jacobus Biesmeijer, Niels Raes, Thomas Wilke, Arthur Francis Sands, Teodora Trichkova, Zdravko Hubenov, Maxim Vinarski, Olga Anistratenko, Tatiana Alexenko & Frank Wesselingh
The unique aquatic Pontocaspian (PC) biota of the Black Sea Basin (BSB) is in decline. The lack of detailed knowledge on the status and trends of species, populations and communities hampers a thorough risk assessment and precludes effective conservation. This paper reviews PC biodiversity trends in the BSB ( Bulgaria, Romania, Moldova, Ukraine and Russia) using endemic molluscs as a model group. We aim to assess changes in PC habitats, community structure and species distribution...

Multi–component NLS Models on Symmetric Spaces: Spectral Properties versus Representations Theory

Vladimir Gerdjikov & Georgi Grahovski

Intrinsic Oscillations of River Stream Flows Determined by ARIST Method

Yavor Chapanov
The river streamflows analyses can be successfully used in water resource planning and management, depending on the needs of the wide range users. It is possible to use these applications in several general directions: as informal, qualitative guidance for water managers, stakeholders and decision makers and prediction about long-term drought variability; for quantitative assessments of longterm hydrologic variability and assessment the severity and duration of drought cycles; as direct inputs into hydrologic models of a...

Registration Year

  • 2021

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  • Bulgarian Academy of Sciences
  • Technological University Dublin
  • Swiss Federal Institute for Forest, Snow and Landscape Research
  • University of Oviedo
  • Technical University of Zvolen
  • National Academy of Sciences of Ukraine
  • Field Museum of Natural History
  • University of Zagreb
  • Institute of Oceanology. PP Shirshov Russian Academy of Sciences
  • Ukrainian National Forestry University