1,721,188 research outputs found
Peninsular patterns in biological diversity: historical arrangement, methodological approaches and causal processes
No full textBattisti, C. (2014): Peninsular patterns in biological diversity: historical arrangement, methodological approaches and causal processes. Journal of Natural History 48 (43-44): 2701-2732, DOI: 10.1080/00222933.2014.925599, URL: http://dx.doi.org/10.1080/00222933.2014.92559
The Tiger (in)Flu(ence): Posthuman, Abject Bodies, ‘Speculated’ Femininities and Diasporic Subjectivities
No full textWritten by Larissa Lai, a Chinese-Canadian writer who has always alchemised her production with Chinese mythology, The Tiger Flu (2018) is a polyphonic novel because of the plurality of interpretative acts it evokes, and because of its interweaving of different literary frames and genres. In the first part of this essay, I analyse how Lai exploits this complex intertwining of genres to address a sense of diasporic belonging. In the second part, I explore how this approach leads to moving beyond normative and totalising definitions. Lai sets up a multifaceted feminine space where issues about the rethinking of the category of woman, sisterhood and a broader conception of community can be raised. I argue that Lai’s representation of non-normative female bodies becomes functional in revealing how abject bodies can challenge the hegemonic meaning of gender and identity. In a critical reading that cannot be divorced from a (trans-)Canadian context, I conclude by exploring how Lai guides her readers on an intimate journey across increasingly fluid borders and an unsolved (and unsolvable) vision of the future
PATTERNS OF LANDBIRD SPECIES COMPOSITION IN ITALY: A CHOROLOGICAL APPROACH FOCUSING ON TRENDS, CONTRA-TRENDS AND GAPS
No full textConnettività e frammentazione: dall'analisi ecologica alla pianificazione ambientale
No full textNella programmazione delle trasformazioni territoriali è sempre più necessario
pervenire a un confronto multidisciplinare nel quale linguaggi, approcci e metodi ricerchino punti di riferimento comuni per conseguire l’obiettivo del «disegno di futuro» che è proprio di ogni forma di pianificazione. Pianificare vuol dire occuparsi delle modificazioni che l’uomo induce sul territorio e, quindi, anche della frammentazione come processo trasformativo a scala di paesaggio che altera la connettività a tutti i livelli ecologici.
La conoscenza dell’ecologia di base, della biogeografia, della dinamica, della genetica e della struttura spaziale delle popolazioni e delle comunità è quindi determinante nei confronti delle decisioni e delle scelte che riguardano la componente antropica.
Al lettore viene offerto un panorama ricostruttivo e sintetizzato dei profili concettuali e delle evoluzioni di pensiero che dalla metà degli anni Novanta hanno portato le «reti ecologiche» all’attuale considerazione.
Il libro costituisce anche l’occasione per affrontare la dialettica multi e interdisciplinare che tanta parte ha avuto, e ancora dovrà avere, nei campi della conservazione della natura, della pianificazione delle aree protette e del paesaggio e delle valutazioni volontarie (Agenda XXI) e obbligatorie (VIA, VAS e VINCA)
PENINSULAR PATTERNS OF BREEDING LANDBIRD RICHNESS IN ITALY: ON THE ROLE OF CLIMATIC, OROGRAPHIC AND VEGETATIONAL FACTORS
No full textFirst records of the red swamp crayfish Procambarus clarkii (Girard, 1852) (Decapoda Cambaridae) from a small circum-Sardinian island (central Mediterranean Sea)
No full textDISTRIBUZIONE SPAZIALE DELL'AVIFAUNA NIDIFICANTE IN RELAZIONE ALLE TIPOLOGIE DI USO/COPERTURA DEL SUOLO
No full textIn spring 2005, an analysis of breeding bird communities in Torre Flavia wetland was carried out by EFP method. Data on community structure were correlated with land use types. Twenty-five breeding bird species were observed and their distribution at local scale was mapped. Anthropophilous species showed a belt-shape pattern respect to the core of the protected area. Species richness did not increase with the environmental heterogeneity. A positive correlation was found between the richness of edge and anthropophilous species and the percentage of anthropogenic disturbed land types
Struttura di comunità ornitiche in ambiente mediterraneo percorso da incendio (Castelfusano, Roma – Italia centrale): studio su un ciclo annuale
No full textBreeding bird communities in burnt and unburnt residual pinewoods were studied over 3 years by line-transect method, following a catastrophic fire event in Castelfusano (Rome, Central Italy, July 2000). We applied bootstrap procedures to evaluate whether the observed data were true or just produced by chance, and then examined the emerging patterns of three levels: community, guild and species levels. At community level, fire altered the total abundance pattern: species abundance decreased in burnt pinewood compared to unburnt, but other parameters were not significantly affected by fire. The destruction and structural simplification of camopy and shrubby components, as well as the increase of edge habitat and patchiness at landscape scale, induced a higher turnover of species in burnt pinewoods. At guild and species level, forest species decreased strongly in terms of richness and abundance in burnt pinewoods; on the contrary the species usually occurring in edge and open habitat increased
Contrasting effects of water stress on wetland-obligated birds in a semi-natural Mediterranean wetland
No full textThis study evaluated the effects of seasonal water level changes on two foraging guilds of water-related bird species in a remnant coastal wetland of central Italy. Data were obtained by point count method. During the seasonal water-level decrease in wetland channels, the Diversity Index and Species Richness of the entire assemblage dropped significantly between May and July. A significant decrease in the number of species was observed in the middle of May, attributed to decreasing water levels related to natural (climatic) and anthropogenic (local fish farming) causes, and the subsequent drying of surrounding marshes and meadows. A first phenological threshold was observed in May, when the water level decreased to 70 cm in channels. A high species turnover occurred in the entire assemblage during this period. The herbivorous-omnivorous species (Anatidae and Rallidae) and zoophagous species (Ardeidae and Podicipedidae) during the study period exhibited opposite trends in the diversity index values. The diversity index progressively decreased for the herbivorous-omnivorous species in the late spring, while increasing for the zoophagous species, due to a greater availability of food (increased fish density due to decreased water level). These contrasting results are a consequence of ecological and phenological (sedentary vs. migrants) traits of the species belonging to these guilds. These data represent useful information for elaborating management strategies focused on the water level regime in Mediterranean small wetlands in which fish-farming activities also occur
Habitat fragmentation sensitivity in mammals: a target selection for landscape planning comparing two different approaches (bibliographic review and expert-based).
No full textHabitat fragmentation is a process at landscape
scale. This work contributes to reviewing the sensitivity to
habitat fragmentation of a set of relatively common and
widespread mammal species occurring in central Italy, by
comparing evidences from literature to a recently published
selection of species obtained by an expert-based method.
This comparison allows us to select a set of mammal
species that may be considered as targets in the landscape
environmental planning and monitoring. For their ecological
specialization, trophic level, large home range and
other ecological traits, such as the dispersal ability, waterrelated
shrews, forest rodents and mustelids, appear as the
more sensitive groups to habitat fragmentation. Considering
a sample of 30 species occurring in central Italy,
we observed differences between the two approaches
(by evidences from literature and an expert-based method),
which may be due to incomplete literature or lack of
meaningful predictors (bias in selection of ecological traits
used in the expert-based procedure). Since in the ecological
network planning the selection of fragmentation-sensitive
target species is a priority, we suggest further field
research, reviews and expert-based approaches on other
vertebrates aimed to define sets of species useful to land
agencies for monitoring environmental plans at landscape
scal
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