In the inner-Alpine dry valleys of the European Alps, extended pine forests are formed by the sub... more In the inner-Alpine dry valleys of the European Alps, extended pine forests are formed by the sub-Boreal Scots pine (Pinus sylvestris L.) growing here close to its southern range of distribution. Since the beginning of the 20th century extended mortality processes in Scots pine forests have been repeatedly reported in the Swiss Rhone valley and since the 1990s also in other dry inner valleys of the Austrian and Italian Alps. A multi-disciplinary research approach was applied to disentangle the various forcing factors of i) pine decline and ii) the spreading of the broadleaves. The studies were conducted in the Swiss Rhone valley, in Italian Valle d’Aosta and Northern Piedmont.
A general conceptual model for complex, stress-induced forest decline was applied. The multiple stress factors were characterized according to their occurrence and impact as predisposing, inciting and contributing factors. Most of theses investigated factors are directly linked with increasing temperatures and subsequent drought, as reported for the past decades and forecasted for the near future. Based on this system analysis, management options were defined to guarantee the current forest goods and services for the future.
Abstract A small population of the Finlayson's squirrel introduced into Italy was studie... more Abstract A small population of the Finlayson's squirrel introduced into Italy was studied, distinguishing the individuals according to pelage colour. The border between the dark brown and the white coloration of the frons, the white spots on the dark brown frons and ...
Mortality of the maize leafhopper Zyginidia pullula (Boheman) (Hemiptera Cicadellidae) had been o... more Mortality of the maize leafhopper Zyginidia pullula (Boheman) (Hemiptera Cicadellidae) had been observed on maize plants cultivated in northwest Italy since the ‘80s of last century. In past research several fungi from the dead leafhoppers having a saprophytic or pathogenic activity were isolated, but only lately Zoophthora radicans (Brefeld) Batko (Zygomycota Entomophthorales) was recognized as the actual pathogen. A research was conducted in 2003 and 2004 to find out how these fungi infected the leafhopper by weekly collecting 30 adult leafhoppers on maize plants and rearing them individually in the laboratory, repeating an unpublished experiment carried out in 1988. Z. radicans was confirmed to be by far the most frequent entomopathogenic agent (8.2% of adult mortality in July-October). It appeared in summer and its presence increased throughout the season, reaching a peak in August (even around 50% of adult mortality). The infestation decreased gradually until the beginning of f...
During the years 1988-1992 an outbreak of the pale tussock moth, Calliteara pudibunda (L.), took ... more During the years 1988-1992 an outbreak of the pale tussock moth, Calliteara pudibunda (L.), took place in northwest Italy (Piedmont and Liguria) in different sites of beech and mixed broadleaf woods in the western Alps, from 700 to 1,300 m of height. This outstanding outbreak (the first recorded below the 48 th parallel) was monitored during 1990-1993, checking pupal densities and rearing parasitoids. In pupae, ichneumonids reached a maximum parasitization rate of 34% and tachinids accounted for up to 19%, whereas in larvae a rather low parasitization rate was equally divided between Diptera (Tachinidae) and Hymenoptera (Ichneumonidae, Braconidae, Eulophidae). Two cases of hyperparasitization were found of the ichneumonid Goedartia alboguttata (Gravenhorst) by Euceros kiushuensis Uchida in the beechwood of Calizzano in Liguria. Very few cases of oophagous parasitization by Trichogramma spp. could be detected. Insect, bird and mammal predators were rather ineffective on the number of...
standard, together with the abundances of key taxa, and the statistical analyses adopted, show ho... more standard, together with the abundances of key taxa, and the statistical analyses adopted, show how close the integration of pedologic and pedofaunistic expertises must be to understand population dynamics and the environmental parameters influencing them, and how thorough the pedofaunistic investigation must be to assess correctly the presence/absence of key taxa when evaluating the biological quality of soils.
Zyginidia pullula (Boheman) (Hemiptera Cicadellidae) is a widespread central European leafhopper ... more Zyginidia pullula (Boheman) (Hemiptera Cicadellidae) is a widespread central European leafhopper about 3 mm long. It is a multivoltine species, with a bisexual reproduction. Some females collected in Northern Italy, when mated with males, give origin to an exclusively female brood. These lineages are infected by Wolbachia pipientis (Rickettsiales), an α-proteobacterium known to induce several reproductive manipulations in its arthropod host. In Z. pullula, the infection by W. pipientis induces feminization of genetical males. These feminized males are characterised by intersexual phenotypes, i.e. they are females harbouring upper pygofer appendages, a typical male secondary sexual feature. In this study we report preliminary results on the ovary histological structure and the immunohistochemical localization of W. pipientis in the gonads of these aberrant females (intersexes).
In the inner-Alpine dry valleys of the European Alps, extended pine forests are formed by the sub... more In the inner-Alpine dry valleys of the European Alps, extended pine forests are formed by the sub-Boreal Scots pine (Pinus sylvestris L.) growing here close to its southern range of distribution. Since the beginning of the 20th century extended mortality processes in Scots pine forests have been repeatedly reported in the Swiss Rhone valley and since the 1990s also in other dry inner valleys of the Austrian and Italian Alps. A multi-disciplinary research approach was applied to disentangle the various forcing factors of i) pine decline and ii) the spreading of the broadleaves. The studies were conducted in the Swiss Rhone valley, in Italian Valle d’Aosta and Northern Piedmont.
A general conceptual model for complex, stress-induced forest decline was applied. The multiple stress factors were characterized according to their occurrence and impact as predisposing, inciting and contributing factors. Most of theses investigated factors are directly linked with increasing temperatures and subsequent drought, as reported for the past decades and forecasted for the near future. Based on this system analysis, management options were defined to guarantee the current forest goods and services for the future.
Abstract A small population of the Finlayson's squirrel introduced into Italy was studie... more Abstract A small population of the Finlayson's squirrel introduced into Italy was studied, distinguishing the individuals according to pelage colour. The border between the dark brown and the white coloration of the frons, the white spots on the dark brown frons and ...
Mortality of the maize leafhopper Zyginidia pullula (Boheman) (Hemiptera Cicadellidae) had been o... more Mortality of the maize leafhopper Zyginidia pullula (Boheman) (Hemiptera Cicadellidae) had been observed on maize plants cultivated in northwest Italy since the ‘80s of last century. In past research several fungi from the dead leafhoppers having a saprophytic or pathogenic activity were isolated, but only lately Zoophthora radicans (Brefeld) Batko (Zygomycota Entomophthorales) was recognized as the actual pathogen. A research was conducted in 2003 and 2004 to find out how these fungi infected the leafhopper by weekly collecting 30 adult leafhoppers on maize plants and rearing them individually in the laboratory, repeating an unpublished experiment carried out in 1988. Z. radicans was confirmed to be by far the most frequent entomopathogenic agent (8.2% of adult mortality in July-October). It appeared in summer and its presence increased throughout the season, reaching a peak in August (even around 50% of adult mortality). The infestation decreased gradually until the beginning of f...
During the years 1988-1992 an outbreak of the pale tussock moth, Calliteara pudibunda (L.), took ... more During the years 1988-1992 an outbreak of the pale tussock moth, Calliteara pudibunda (L.), took place in northwest Italy (Piedmont and Liguria) in different sites of beech and mixed broadleaf woods in the western Alps, from 700 to 1,300 m of height. This outstanding outbreak (the first recorded below the 48 th parallel) was monitored during 1990-1993, checking pupal densities and rearing parasitoids. In pupae, ichneumonids reached a maximum parasitization rate of 34% and tachinids accounted for up to 19%, whereas in larvae a rather low parasitization rate was equally divided between Diptera (Tachinidae) and Hymenoptera (Ichneumonidae, Braconidae, Eulophidae). Two cases of hyperparasitization were found of the ichneumonid Goedartia alboguttata (Gravenhorst) by Euceros kiushuensis Uchida in the beechwood of Calizzano in Liguria. Very few cases of oophagous parasitization by Trichogramma spp. could be detected. Insect, bird and mammal predators were rather ineffective on the number of...
standard, together with the abundances of key taxa, and the statistical analyses adopted, show ho... more standard, together with the abundances of key taxa, and the statistical analyses adopted, show how close the integration of pedologic and pedofaunistic expertises must be to understand population dynamics and the environmental parameters influencing them, and how thorough the pedofaunistic investigation must be to assess correctly the presence/absence of key taxa when evaluating the biological quality of soils.
Zyginidia pullula (Boheman) (Hemiptera Cicadellidae) is a widespread central European leafhopper ... more Zyginidia pullula (Boheman) (Hemiptera Cicadellidae) is a widespread central European leafhopper about 3 mm long. It is a multivoltine species, with a bisexual reproduction. Some females collected in Northern Italy, when mated with males, give origin to an exclusively female brood. These lineages are infected by Wolbachia pipientis (Rickettsiales), an α-proteobacterium known to induce several reproductive manipulations in its arthropod host. In Z. pullula, the infection by W. pipientis induces feminization of genetical males. These feminized males are characterised by intersexual phenotypes, i.e. they are females harbouring upper pygofer appendages, a typical male secondary sexual feature. In this study we report preliminary results on the ovary histological structure and the immunohistochemical localization of W. pipientis in the gonads of these aberrant females (intersexes).
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Books by P. Mazzoglio
A general conceptual model for complex, stress-induced forest decline was applied. The multiple stress factors were characterized according to their occurrence and impact as predisposing, inciting and contributing factors. Most of theses investigated factors are directly linked with increasing temperatures and subsequent drought, as reported for the past decades and forecasted for the near future. Based on this system analysis, management options were defined to guarantee the current forest goods and services for the future.
Papers by P. Mazzoglio
A general conceptual model for complex, stress-induced forest decline was applied. The multiple stress factors were characterized according to their occurrence and impact as predisposing, inciting and contributing factors. Most of theses investigated factors are directly linked with increasing temperatures and subsequent drought, as reported for the past decades and forecasted for the near future. Based on this system analysis, management options were defined to guarantee the current forest goods and services for the future.