Search results for "conservation."
showing 10 items of 1994 documents
Predicting the risk of extinction from shared ecological characteristics
2005
Understanding the ultimate causes of population declines and extinction is vital in our quest to stop the currently rampant biodiversity loss. Comparison of ecological characteristics between threatened and nonthreatened species may reveal these ultimate causes. Here, we report an analysis of ecological characteristics of 23 threatened and 72 nonthreatened butterfly species. Our analysis reveals that threatened butterflies are characterized by narrow niche breadth, restricted resource distribution, poor dispersal ability, and short flight period. Based on the characteristics, we constructed an ecological extinction risk rank and predicted which of the currently nonthreatened species are at …
Geographic Distribution and Niche Divergence of Two Stinkbugs,Parastrachia japonensisandParastrachia nagaensis
2014
Parastrachiidae is a small stinkbug family containing only one genus and two species, Parastrachia japonensis (Scott) (Hemiptera: Heteroptera: Pentatomoidea) and Parastrachia nagaensis Distant. The geographic distribution of the genus has been poorly studied. Niche conservatism refers to that idea that closely related species are more ecologically similar than would be expected, whereas niche divergence predicts they occupy distinct niche spaces. The existence of only two species within one genus suggests niche conservatism or differentiation might exist among them. Herein, the distribution of the genus was mapped, potential distributions were predicted using ecological niche modeling, and …
No evidence of systematic pre-emptive loggings after notifying landowners of their lands’ conservation potential
2020
Landowners can intentionally impair biodiversity values occurring on their land to pre-empt biodiversity protection. This often leads to significant negative effects on biodiversity. We studied whether landowners in Finland engaged in pre-emptive loggings after they were notified that their wooded mires are candidate sites for a mire protection program. After the notification, harvesting rates of the candidate wooded mires were significantly lower compared to harvesting rates of similar but non-candidate wooded mires. Annual and monthly harvesting rates indicated that notifying landowners of the conservation potential did not launch systematic pre-emptive logging behavior. Nevertheless, par…
La diagnostica chimico-fisica a supporto della conservazione e del restauro delle opere cartacee
2017
Questo contributo è stato prodotto a seguito dell’intervento del Prof. Caponetti e della sessione laboratoriale guidata dalla Dott.ssa Saladino in collaborazione con il Dott. Renda e la Dott.ssa Chirco in cui è stata realizzata una dimostrazione pratica di come si possano eseguire le indagini di materiale cartaceo con strumentazione portatile. Nel presente contributo sono presentate e illustrate alcune delle tecniche di indagine idonee per l’analisi di opere cartacee, ed in particolare alcune di quelle che possono essere applicate mediante strumentazione portatile. Queste tecniche forniscono informazioni complementari e consentono la conoscenza dell’opera stessa (tipologia di carta, tecnica…
Autecology and ex situ growth of Leontopodium nivale subsp. nivale (Asteraceae) from North Pirin marbles (SW Bulgaria)
2018
Kozuharova, E., Panayotov, M. & Spadaro, V.: Autecology and ex situ growth of Leontopodium nivale subsp. nivale (Asteraceae) from North Pirin marbles (SW Bulgaria). — Fl. Medit. 28: 187-206. 2018. — ISSN: 1120-4052 printed, 2240-4538 online. Leontopodium nivale subsp. nivale is a local and disjunct endemic of the central Apennines in Italy and the Pirin Mountains in Bulgaria. The aim of this study is to investigate in situ microhabitat specifics and ex situ ontogenesis regarding the possible future cultivation and to evaluate hazards for wild populations in conditions of human impact and climate change. Leontopodium nivale subsp. nivale is stenobiont which is difficult to grow ex situ and t…
Solid state NMR investigation of the roman Acqualadroni rostrum: tenth year assessment of the consolidation treatment of the wooden part
2020
Abstract: This work follows a previous one dealing with the state of conservation study of the wooden part of the roman Acqualadroni rostrum soon after its finding in the seabed of Acqualadroni (Messina, Italy). The archaeological survey and recovery were particularly relevant since this artefact is one of the two rostrums, nowadays known,found together with its wooden part. Following the recovery, it was consolidated by immersion in a melamine-formaldehyde resin (Kauramin) aqueous solution for eight months at the “Centro di Restauro del Legno Bagnato” (Pisa, Italy). The present investigation is aimed to determine at microscopic scale the wood state of conservation and to highlight interact…
Population trend in Abies nebrodensis (Lojac.) Mattei
2014
3.1 = POPULATION TREND IN ABIES NEBRODENSIS (LOJAC.) MATTEI ROSARIO SCHICCHI*,FILIPPO AMATO, GAETANO LA PLACA, PEPPUCCIO BONOMO Dipartimento di Scienze Agrarie e Forestali, Via Archirafi, 38 - 90123 Palermo, Italy. *e-mail: rosario.schicchi@unipa.it Abies nebrodensis (Lojac.) Mattei is an endemic species of Sicily seriously threatened with extinction. Its natural population consists of individuals, occurring in a narrow area within the territory of the Madonie Regional Park. A. nebrodensis has been subject to specific conservation measures implemented by the University of Palermo, the Park Authority and the Regional Department of Forests of the Sicilian Region and other local partners for o…
Inflorescence-visiting insects of a functionally dioecious wild grapevine
2018
The wild grapevine [Vitis vinifera L. subsp. sylvestris (Gmelin) Hegi] is the Eurasian dioecious ancestral form of mostly monoecious domesticated cultivars (Vitis vinifera subsp. vinifera). There are different hypotheses about grapevine pollination, varying from insect to wind pollination to spontaneous self-pollination. The aim of this paper is to update our knowledge on the biology of the wild grapevine by studying the insects visiting their inflorescences. During the fieldworks, floral visitors were observed, captured and identified. The most frequent insects visiting both sexes of wild grapevine were beetles (55%) followed by bees (45%). The present study shows that although in vineyard…
Gli approfondimenti conoscitivi e le tecniche per la conservazione delle consistenze monumentali della chiesa di Sant’Anna a Palermo
2010
Il contributo è un riassunto del progetto ed evidenzia, in particolare, gli approfondimenti conoscitivi e le tecniche per il risanamento e la manutenzione delle consistenze della chiesa, caratterizzata dalla sinuosa facciata barocca. The contribution is a graphic abstract of the project and highlights, in particular, the in-depth knowledge and techniques for the restoration and maintenance of the material consistency of the church, characterized by its sinuous baroque facade.
Interventi di conservazione degli alberi monumentali in Sicilia
2009
Gli alberi monumentali, elementi fra i più appariscenti del mondo vegetale, possono essere considerati beni unici ed irripetibili. Essi rappresentano un peculiare aspetto della biodiversità che deve essere tutelato e valorizzato alla stessa stregua dei monumenti in pietra, dei centri storici, delle grandi strutture architettoniche (Schicchi & Raimondo, 1999). Negli ultimi anni in Sicilia, come in altre regioni italiane, le iniziative volte alla conoscenza di questo particolare patrimonio culturale si sono intensificate, grazie alla sensibilità di diversi enti territoriali (comuni, province, regioni, parchi naturali). Per questa stessa regione, Schicchi & Raimondo (2005, 2006, 2007) e Schicc…