Search results for " guilds"

Does trait-based joint species distribution modelling reveal the signature of competition in stream macroinvertebrate communities?

2021

1. The occupancy and abundance of species are jointly driven by local factors, such as environmental characteristics and biotic interactions, and regional‐scale factors, such as dispersal and climate. Recently, it has been shown that biotic interactions shape species occupancies and abundances beyond local extents. However, for small ectothermic animals, particularly for those occurring in freshwater environments, the importance of biotic interactions remains understudied. Species‐to‐species associations from joint species distribution models (i.e. species associations while controlling for environmental characteristics) are increasingly used to draw hypotheses of which species possibly sho…

La maestranza dei muratori e degli intagliatori di Cefalù: i capitoli del 1631

2016

In età moderna le maestranze si configurano come un’associazione, alla cui attività devozionale e assi- stenziale si aggiunge quella economica e giurisdizionale, in rapporto all’esercizio di un’arte, ossia di un mestiere. Relativamente al settore edile, a partire dalla fine del Quattrocento vengono stilati gli statuti delle corporazioni delle principali città siciliani, quali Palermo (1487), Siracusa (1515), Modica (1541- 1542), Messina (1559), Nicosia (1560) e Trapani (1598), mentre al 1631 risale l’istituzione della Maestranza dei muratori e degli intagliatori di Cefalù; infatti, come risulta dagli atti del notaio locale Calogero D’Anna, l’11 febbraio di quell’anno vennero redatti i Capit…

Palermo in the 14th-15th century: the Urban Society

2013

The invasive Asparagopsis taxiformis hosts a low diverse and less trophic structured molluscan assemblage compared with the native Ericaria brachycar…

2021

Abstract Invasive seaweeds threaten biodiversity and socio-economics values of worldwide marine ecosystems. Understanding to what extent invasive seaweeds can modify local biodiversity is one of the main priorities in conservation ecology. We compared the molluscan assemblage of the invasive Asparagopsis taxiformis with that of the native Ericaria brachycarpa and explore if variation in the molluscan assemblage diversity was related to the substrate attributes (biomass, and thallus, canopy, and interstitial volumes) of the algae. Results showed that A. taxiformis harboured lower diversity and trophic structure of the molluscan assemblage compared to E. brachycarpa. Biomass was the variable …

Construction Guilds in Southern Italy and the Islands (15th-16th Centuries): Leadership and Rivalries

2020

In the South of Italy and the big islands, in counter-trend with respect to the rest of the peninsula, construction guilds know a renewed vitality between the last decades of 15th and the beginning of 16th centuries. Rules, prerogatives and operative modes are regulated by statutes, often undersigned by the masters included in the trade organization, mentioning also the other actors involved in the approval processes. The intertwining of these and other archival documents sometimes reveals the leading role played within the guild by masters that overcome the anonymity usually considered to be inherent in the corporate system. Comparing the rules and the boundaries among specific trades esta…