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Mycobiota of Dead Ulmus glabra Wood as Breeding Material for the Endangered Rosalia alpina (Coleoptera : Cerambycidae)

Bartnik Czesław, Michalcewicz Jakub, Ledwich Dominika, Ciach Michał

Polish Journal of Ecology

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2020

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Vol. 68, nr 1

13--22

EN

The presence in wood of saprotrophic fungi is crucial for xylophagous insects, as they modify its chemical composition, moisture content and structure, and thus govern the survival and growth rate of larvae. Little is known about the mycobiota colonising the breeding material of saproxylic species. This paper focuses on the mycobiota of dead wych elms Ulmus glabra as breeding material for the endangered Rosalia alpina. Fungal isolates from wood fragments of the breeding material were identified using molecular techniques. A total of 24 taxa of wood-decay fungi were found (16 Ascomycota, 6 Basidiomycota, 1 Zygomycota, 1 unidentified) – saprotrophs and facultative parasites, saprotrophic fungi, fungal parasites and tree parasites. Six taxa were isolated from both the surface and deeper layers of the wood, and also from the wood dust and frass left in R. alpina foraging sites: Cladosporium cladosporioides, Cladosporium sp., Hypoxylon macrocarpum, Phaeoacremonium fraxinopennsylvanicum, Sistotrema brinkmannii and Stereum hirsutum. These fungi may be crucial in enabling R. alpina to colonise dead or dying trees and affect its larval development. Ph. fraxinopennsylvanicum, H. macrocarpum and Daldinia childiae are reported for the first time from Poland.

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Wood decomposition by porodaedalea pini from different regions of Poland

Szewczyk W.

Drewno : prace naukowe, doniesienia, komunikaty

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2015

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vol. 58, nr 194

127--134

EN

The results of studies on heartwood decomposition caused by Porodaedalea pini in pine, spruce and larch are presented. It was found that spruce wood was decomposed to the greatest extent, while pine and larch less so. No relationship was found between the geographical origin of the isolate and its wood decomposition capacity.

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Konserwacja zachowawcza a trwałość budowli drewnianych

Witomski P.

Budownictwo i Architektura

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2015

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Vol. 14, nr 4

157--164

PL

W pracy zaprezentowano główne problemy związane z trwałością budowli drewnianych w kontekście biokorozji. Wymieniono czynniki biokorozji występujące w architekturze drewnianej oraz ich zależność od warunków klimatycznych. Wskazano główne czynniki wpływające na wielowiekową trwałość budowli historycznych, w tym dobór materiałów. Dokonano przeglądu rozwiązań konstrukcyjnych przyczyniających się do zwiększenia trwałości obiektów, zarówno tych wyrosłych z tradycji ciesielskiej, jak i współcześnie stosowanych zabiegów konserwatorskich.

EN

The paper outlines the main problems associated with the durability of wooden buildings in the context of biodegradation. Wood destroying organisms were listed and their climatic requirements were pointed. It was indicated that the main factor affecting the durability of the old historical buildings, was the selection of wood. Traditional carpentry solutions ensuring the durability of timber structures were presented.

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Amber cockroaches, wood decomposers, dinosaur dung, clean Mesozoic ground and eusociality

Vrsansky P.

Geology, Geophysics and Environment

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2014

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Vol. 40, no. 1

135

EN

Among unresolved enigmas of ancient terrestrial ecosystems functioning, the origin of social life, wood decomposition, provisioning of dinosaur dung and cleanness of Mesozoic ground belong to most important ones (Zherikhin 2002). Sample from dinosaur-aged (125-million-year old) amber of Lebanon provided partial answer for all these questions (Vrsansky et al. 2013). An immature individual of the cockroach family Blattulidae was preserved with coprolites partially extruded from the body and containing particles of wood indicating external pre-digestion. Based on distribution curves (obtained using ST) a hypothesised was advanced that source of the wood particles were dinosaur feces. Additionally, identical particles of wood were discovered in dung of Mesozoic dinosaurs and lystrosaurs (Fiorelli et al. 2013, unpublished), supporting the present claims in unrequiring chewing of wood by cockroaches. The presence of processed wood with smooth edges is important in providing evidence for the occurrence of lignolytic endosymbionts in ancient cockroaches, which are transferred only in multigenerational organisation of population structure (e.g. in termites). In contrast to intuition, masses of dinosaur dung did not decay automatically as they contain too much nitrogen (as in birds) and normally would be deposited analogically to guano (high proportion of phosphorus). Nevertheless, after the extraction of nitrogen, dung is further exploited by plants, microorganisms and animal decomposers. This is in sharp contrast to exploitation of mammal dung and its fixed rapid exploiters. Nevertheless, also mammal dung can prevent growth of plants including grasses (see example from present-day Australia, where introduction of dung beetles was necessary - Bornemissza 1960). Huge amounts of dinosaur dung would cover surface and prevent growth of the lowest levels of plants, which would allow the significant erosion. Thus, thanks to an amber cockroach we now know that Mesozoic forests were rather clean due to clean-up services provided by cockroaches (no other dung-provisioning insects are known from the beginning of the Mesozoic).