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1. Biological and distributional overview of the genus Eledonoprius (Coleoptera: Tenebrionidae): rare fungus-feeding beetles of European old-growth forests

Creator:
Carpani, Alberto, Chiari, Stefano, Audisio, Paolo A., Leo, Piero, Liberto, Andrea, Jansson, Nicklas, and Zauli, Agnese
Type:
article, články, model:article, and TEXT
Subject:
Zoologie, zoologie, entomologie, Tenebrionidae, Eledonoprius, saproxylic fauna, mycophagy, bracket fungi, forest ecosystems, old trees, cork oaks, 2, and 59
Language:
English
Description:
All the information on the genus Eledonoprius was gathered to provide an up to-date overview of the geographical distribution and ecology of its species, and to assess their association with old-growth forests. Based on recent samples collected in deciduous forests and woodlands of Italy, the authors outline the habitats of these rare species and give an account of their trophic relations with bracket fungi. E. armatus is recorded in Central Italy and Sardinia for the first time; E. serrifrons is new to Basilicata (Southern Italy) and Syria., Giuseppe M. Carpaneto ... [et al.]., and Obsahuje seznam literatury
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. When is a tree suitable for a veteran tree specialist? Variability in the habitat requirements of the great capricorn beetle (Cerambyx cerdo) (Coleoptera: Cerambycidae)

Creator:
Platek, Michal , Sebek, Pavel, Hauck, David , and Cizek, Lukas
Format:
počítač and online zdroj
Type:
model:article and TEXT
Subject:
Coleoptera, Cerambycidae, saproxylic beetles, deadwood, conservation management, old trees, veteran trees, habitat requirements, realized niche, site-specifi c patterns, great capricorn beetle, and Cerambyx cerdo
Language:
English
Description:
Large veteran trees are key structures sustaining biodiversity in wooded landscapes. Many organisms associated with such trees are, however, also able to inhabit suitable trees with smaller diameters or other surrogate habitats. Understanding the mechanisms behind the importance of veteran trees and the conditions enabling veteran tree specialists to exploit smaller trees might help conservation efforts targeted at the diverse and highly endangered biota associated with veteran trees. To investigate this, we studied local patterns in the exploitation of trees by a veteran tree specialist, the great capricorn beetle (Cerambyx cerdo), at three sites with different soil characteristics, namely fl oodplain, dry-sandy and dry-rocky sites, where this beetle exploits oaks of large (~1.5 m), medium (~0.75 m) and small (~0.25 m) diameters, respectively. We recorded the presence and number of exit holes made by C. cerdo on each tree and related these to the characteristics of the trees: their diameters, openness of the canopy around them and their state of health. The probability of occurrence and the number of exit holes increased with tree diameter, canopy openness, and decreasing tree health, but these relationships differed considerably among the study sites. In dry conditions, trees of small diameters were more likely to be exploited by the beetle than in the fl oodplain. The number of exit holes, on the other hand, was a function of tree diameter, with large trees sustaining more beetles and thus acting as larger habitat patches. The species of oak affected the probability of exit hole presence as the sessile oak (Quercus petraea) and pedunculate oak (Q. robur) were preferred over Turkey oak (Q. cerris). The slope orientation also affected the presence of exit holes as trees on slopes with either an eastern or northern orientation were not exploited by the beetle. This study revealed a high level of between-site variability in the tree characteristics relevant to predicting the occurrence of C. cerdo, mainly with respect to diameter. Therefore, while the general patterns of habitat use and the fundamental niche of this beetle are well known, survival and protection of local populations is dependent on site-specifi c characteristics. The realized niche of this beetle must therefore be carefully considered when planning conservation management for a particular site. The results also signify that at some sites, small trees can, at least temporarily, substitute for scarce large trees if the state of their health is managed using proper conservation measures.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public