Zanikanie nadobnicy alpejskiej Rosalia alpina (L.) (Coleoptera: Cerambycidae) w Polsce - wybrane mechanizmy procesu

Paweł Adamski , Marek Holly , Jakub Michalcewicz , Zbigniew Witkowski

Abstract

The authors focused on two selected mechanisms of decline of the rare and endangered beetle Rosalia longicorn in Poland. The objective of this study was to prove that the main cause of the species vanishing are ecological traps in the form of logged and piled wood. Random phenomena associated with the mechanisms of the species reproduction are indicated as the second cause of the species decline, which particularly strongly affect the isolated, marginal and small populations. Verification of the ecological trap hypothesis based on the data of Rosalia longicorn observations in the Bieszczady Mts, over the last decades. Whereas the random phenomenon concept based mainly on the theoretical model. The most of the species observations in Bieszczady Mts, have been done in wood yards and the contribution of these observations was significantly increasing. This results clear-ly indicates that wood piles as food resources attracted imagines of the Rosalia longicorn. As the deposited wood is removed or burned, larvae presented in it, can’t complete they development. Significant decrease in ratio of the observations of several individuals dropped at the same time, suggests the decrease of the whole population abundance. So one may conclude that wood piles may play the role of ecological traps for Rosalia lon-gicorn. The presented in the paper hypothesis on the importance of random phenomena for small populations decline is related to the long-time development of the Rosalia alpina. Differences in the larval development period of this species, mentioned in this study, have different implications for big and small populations. In abundant populations this phenomenon results in the maintenance of gene flow between cohorts derived from eggs laid in different years. Whereas in the case of small populations, increases the isolation between cohorts. It may results in extinction of particular cohorts due to random causes. This entails the risk of establishing some kind of unequilibrium metapopulation, with time as the isolation factor instead of space. According to the authors, described mechanisms should be included in the programme of Rosalia longicorn protection in different areas.
Author Paweł Adamski
Paweł Adamski,,
-
, Marek Holly
Marek Holly,,
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, Jakub Michalcewicz (FoF / DoFPFEaC)
Jakub Michalcewicz,,
- Department of Forest Protection, Forest Entomology and Climatology
, Zbigniew Witkowski
Zbigniew Witkowski,,
-
Other language title versionsDecline of Rosalia longicorn Rosalia alpina (L.) (Coleoptera: Cerambycidae) in Poland - selected mechanisms of the process
Pages185-200
Publication size in sheets0.75
Book Ząbecki Wojciech (eds.): Rola i udział owadów w funkcjonowaniu ekosystemów leśnych, 2013, Wydawnictwo Uniwersytetu Rolniczego, ISBN 978-83-60633-92-2, 349 p.
Keywords in Polishnadobnica alpejska, pułapka ekologiczna, małe populacje, zanikanie populacji, ochrona gatunkowa
Keywords in EnglishRosalia longicorn, ecological trap, small population, population decline, species conservation, Poland
Abstract in PolishW pracy przedstawiono dwa wybrane mechanizmy zmniejszenia liczebno-ści i zanikania populacji nadobnicy alpejskiej Rosalia alpina (L.) w Polsce: (1) działanie pułapki ekologicznej ( ecological trap ) w postaci pozyskanego i składowanego drewna, jako istotny mechanizm osłabienia populacji oraz (2) zjawiska losowe związane z mecha-nizmami rozrodu gatunku jako przyczyna zaniku niewielkich, izolowanych, marginalnych populacji. Powyższe mechanizmy przedstawiono na tle danych o występowaniu nadobni-cy alpejskiej oraz zidentyfikowanych zagrożeń dla gatunku w Polsce.
URL http://www.researchgate.net/publication/262237676_Zanikanie_nadobnicy_alpejskiej_Rosalia_alpina_(L.)_(Coleoptera_Cerambycidae)_w_Polsce__wybrane_mechanizmy_procesu
Internal identifierWL/M/30/2013; WL/6/22
Languagepl polski
Score (nominal)5
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