Search results for "Fauna"
showing 10 items of 513 documents
Alimentació a l'Eivissa púnica (segles V a II a.E.)
2015
L’objecte d’estudi d’aquesta tesi ha estat la recerca sobre els diferents patrons alimentaris tant en una geografia com una cronologia molt concreta: l’illa d’Eivissa durant els segles V al II, en el període denominat púnic clàssic i tardà. L’abundant informació arqueològica, així com les fonts clàssiques, han sigut essencials per discernir les diverses conductes nutricionals segons els diversos àmbits i períodes analitzats. Igualment, hem prestat especial atenció als estudis específics sobre la fauna, les analítiques de continguts de recipients ceràmics i els isòtops estables a ossos humans. No hem dubtat en recórrer a altres situacions paral·leles que podem trobar en altres jaciments púni…
Ģeogrāfija. Ģeoloģija. Vides zinātne: referātu tēzes
2011
Zooloģijas muzeja raksti, Nr. 2 Vertebrata
1968
Osgillazioni eustatiche, biocronologia dei depositi continentali quaternari e neotettonica nella Sicilia nord-occidentale (penisola di San Vito lo Ca…
1999
Vengono presentati i risultati di uno studio interdisciplinare condotto nella Penisola di San Vito lo Capo, Sicilia nord - occidentale. In questa area i terreni quaternari sono rappresentati da depositi marini e di spiaggia distribuiti a varie quote e da depositi continentali contenenti resti di vertebrati. Questi terreni si rinvengono all'interno di solchi e grotte marine, dove sono state riconosciute anche fasce a fori di litodomi, o costituiscono corpi sedimentari che giacciono sopra superfici di abrasione marina. Le associazioni a mammiferi presenti in tali terreni appartengono al complesso faunistico a Elephas falconeri del primo Pleistocene medio, al complesso a Elephas mnaidriensis d…
Predicting the stream macroinvertebrate fauna across regional scales: influence of geographical extent on model performance
2008
AbstractPredictive modeling is used increasingly often in freshwater bioassessment. These models are routinely applied across broad geographical areas, yet the influence of spatial extent on model performance has not been assessed directly. We examined the influence of changing geographical extent on the performance of River InVertebrate Prediction and Classification System (RIVPACS)–type predictive models of benthic macroinvertebrates in boreal headwater streams representative of reference conditions. Separate models were constructed for 2 hierarchical extents: within ecoregions (middle boreal and north boreal) and across ecoregions. We assessed the accuracy and precision of the models usi…
ATTIVITÀ E DISTRIBUZIONE DELLA CHIROTTEROFAUNA IN ECOSISTEMI RURALI DELLA SICILIA CENTRO-OCCIDENTALE
2012
Biodiversità associata ai reef a vermeti: effetti dell'acidificazione sulla malacofauna
2014
La continua e prevista Acidificazione degli Oceani (AO) potrebbe rappresentare un ampio fattore di stress per molti organismi marini, soprattutto calcificanti. La principale causa dell’acidificazione degli oceani è legata all’aumento della CO₂ antropogenica. I Reef a Vermeti, a causa della loro eterogeneità, la locazione intertidale e gli alti livelli di biodiversità che supportano, rappresentano un Habitat chiave in Mediterraneo. Attraverso un esperimento di trapianto sono state valutate possibili variazioni in composizione e struttura del popolamento a molluschi associato lungo un gradiente naturale di pH.
Biotic recovery after the end-Triassic extinction event: Evidence from marine bivalves of the Neuquén Basin, Argentina
2017
We analyze the Late Triassic extinction and Early Jurassic recovery of bivalve faunas within marine environments in the Atuel River area of the Neuquén Basin, Argentina. Data were collected from a hundred samples with invertebrates in a well-exposed uppermost Triassic to lower Jurassic section in the Neuquén Basin (southern Mendoza Province, Argentina) and allow a high-resolution reconstruction of the local diversity dynamics. The nearly continuous presence of marine stenohaline major taxa such as cnidarians, rhynchonelliform brachiopods, echinoderms and cephalopods indicates normal salinity throughout. All bivalve species were identified, and each occurrence was recorded in meters above th…
Habitat geometry of benthic substrata: effects on arrival and settlement of mobile epifauna
1996
Abstract The effect of substratum complexity on the early stages of colonization by mobile epifauna was assessed through a comparative study based on the architecture of artificial substrata. We conducted field observations over 4 years, on six types of small plastic substrata placed in the low intertidal zone of an exposed rocky shore, for varied immersion periods (1, 2, 4 and 12 wk). The use of artificial substrata allowed us to manipulate independently structural and spatial features of the habitat, such as total area, amount of folds, intercepting area, total volume, and interstitial volume. The invertebrate fauna colonizing over 300 sample units was recorded, and their densities compar…
Fossil micromammals of the early Pliocene locality of Almenara MB: biostratigraphical and palaeoecological implications
2020
In this work, we have studied the fossil rodent, insectivore and chiropteran faunas, of a new locality from the AlmenaraCasablanca karstic complex, named ACB MB (Castellón, east Spain). We consider an early Ruscinian age for this site, close to the Miocene/Pliocene boundary, and infer warm and relatively humid conditions from the analysis of the micromammal assemblage. We remark the presence of two species of Eliomys in ACB MB, rare in localities of this age, and the lack of any gerbil remains, fossil markers of faunal interchanges between Africa and Europe in the context of the Messinian Salinity Crisis, recorded in the nearby late Miocene site of ACB M