1,720,965 research outputs found
Acoustic individuality of free-ranging red deer (Cervus elaphus, L.) stags.
No full textdescription of acoustic individual features in the red deer Cervus elaphu
Dormouse injuries predispose beech to infection by Neonectria ditissima.
No full textAfter awaking from winter hibernation, the Edible dormouse begins to feed by stripping the bark and the outer part of the xylem from the branches of both broadleaves and conifers. Natural or artificial wounds are essential for the penetration and colonisation of the tissues by the fungal pathogen Neonectria ditissima. This pathogen creates open cankers on beech branches and other broadleaves, which are frequently later infected by wood-decaying fungi. Because of the high frequencies of both dormouse injuries and branch cankers in a large monospecific beech forest in northern Italy, field and laboratory investigations were conducted to verify whether rodent-inflicted injuries on beech were a preferred infection point for the pathogen. These studies also examined the susceptibility to infection of the dormouse-inflicted wounds over time, and the relationships between dormouse damage, Neonectria infection, and wood decay. The results showed a significant direct correlation between the percentage of infections and their proximity to the wounds, indicating that the parasite localises to sites where there are receptive dormouse injuries. In addition, the susceptibility of the wound was found to diminish with increasing age, disappearing in 120-150 days. The association between dormouse injuries, Neonectria cankers and wood decay was also found to cause approximately half of the frequent beech branch breakages during intense weather events
Impatto dei cervidi negli ecosistemi forestali - Evoluzione della tecnica e del pensiero
No full textAnalisi della bibliografia riguardante l'impatto degli ungulati negli ecosistemi forestali, con particolare riferimento ai cervici italiani (cervo, capriolo e daino) e alla rinnovazione forestale. Il lavoro riassume quanto sinora disponibile sull'argomento, dalla comparsa del fenomeno nel secondo dopoguerra ad oggi, considerando la realtà nazionale ed internazionale. Viene introdotto il contesto storico e culturale nel quale si inserisce il fenomeno, si presentano brevemente le specie coinvolte, sia animali che vegetali e si discutono il ruolo degli ungulati ed il concetto di danno. Si descrivono le principali tipologie di impatto sulla singola pianta e gli effetti a diverse scale spaziali e temporali. Si presenta una classificazione delle metodologie di analisi sino ad oggi sviluppate ed applicate. si raccolgono infine le informazioni disponibili sulle modalità di approccio al fenomeno, sia da un punto di vista teorico che pratico
Danni da ungulati alla rinnovazione naturale delle foreste. Un confronto tra alcune esperienze di indagine.
No full textI danni causati alla rinnovazione forestale da parte degli ungulati, il cui carico almeno localmente è andato aumentando negli ultimi decenni, è fonte di notevole preoccupazione per i selvicoltori.
Si descrivono sinteticamente in questo lavoro alcune indagini svolte in boschi di località italiane diverse nel corso dell'ultimo quindicennio,al fine di quantificare la presenza di danni da cervidi sulle piantine forestali e di verificare eventuali relazioni con i parametri di popolamento e il trattamento selvicolturale. Vengono esposti in sintesi le metodologie seguite e i risultati ottenuti e si formulano alcune proposte per orientare la prassi operativa nella raccolta dei dati
Acoustic features of Red deer (Cervus elaphus) stags vocalizations in the Cansiglio Forest (NE Italy, 2001-2002).
Full text linkDescription of acoustic features of Red deer (Cervus elaphus) stags vocalizations in the Cansiglio Forest provides evidence of individual features to be used to recognize individuals
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Sistemi automatici di registrazione: nuove metodologie bioacustiche applicate a indagini ornitologiche in alcuni siti della Rete Natura 2000 del Veneto. Risultati e prospettive.
Full text linkIl lavoro illustra i risultati di un progetto di monitoraggio acustico delle specie ornitologiche presenti in alcuni siti della Rete Natura 2000 del Veneto. Si descrive la metodologia impiegata, basata su registratori automatici programmabili e sull'analisi spettrografica delle registrazioni risultanti. Il progetto e' stato realizzato in collaborazione con il Corpo Forestale dello Stato
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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