202 research outputs found
I preverbi. Tra sintassi e diacronia
No full textIl volume raccoglie cinque contributi presentati al workshop 'Giornata di studio sui preverbi' (Padova, 2009); i prefissi verbali vengono analizzati dai singoli autori (D. Bertocci, F. Cognola, F.Damonte e A. Padovan, J. Garzonio, C. Poletto) trattando lingue diverse (latino, tedesco, russo, cimbro) in prospettiva sia diacronica sia sintattica, sulla scorta degli studi teorici più recenti
FIGURE 2 in Apseudes talpa revisited (Crustacea; Tanaidacea). The impact on apseudidaen systematics
No full textFIGURE 2. Apseudes talpa, Portugal (reg # MMF41156-3). A, non-ovigerous female/juvenile, B–E, ovigerous simultaneous hermaphrodite. A, lateral view, Scale bar = 1 mm; B, lateral shield of pleonites, dorsal view; C, antennae; D, pleopod; E, uropod. Scale bars = 1 mm.Published as part of Larsen, Kim, Bertocci, Iacopo & Froufe, Elsa, 2011, Apseudes talpa revisited (Crustacea; Tanaidacea). The impact on apseudidaen systematics, pp. 19-30 in Zootaxa 2886 on page 24, DOI: 10.5281/zenodo.27760
Il polimorfismo tra disordine e regolarità: i tipi habù e habiù nei volgari veneti medievali
No full textThe aim of this paper is to discuss some cases of polymorphism
in the empirical domain of the ancient Venetan dialects,
notably the existence of two competing strategies for the formation
of the perfect participles of avere and other verbs. Before dealing
with it, it will be addressed a methodological topic, that is, which
kind of linguistic system can be reconstructed from data where
optionality is in order, especially in morphology. I will propose,
then, to treat polymorphisms in the light of the typological theory
of canonicity, which allows evaluating irregular morphology
according to comparative criteria. Under this view, it will be shown
that the optionality between e.g. the expected form of the perfect
participle habù and the marked form habiù related to the present
subjunctive, is coherent with an analogical trend well attested in the
Northern Italian dialects since the Middle Ages. Having identified
this diachronic pattern is relevant for at least two reasons: first, it
demonstrates that even morphological disorder can be accounted
for within a systemic picture; secondly, it shows that diachronic
issues can give a contribution to the discussion about canonicity.
Beside this, the possibility that under specific conditions subjunctive
stems interfere with the formation of the perfect participle,
allows to consider the relationships within Norther Italian medieval
varieties more carefully
Tipi di preverbazione in latino: la funzionalità aspettuale
No full textLo studio analizza le funzioni aspettuali dei prefissi verbali in latino e propone un'ipotesi per la loro origine, a partire dall'idea che essi fossero elementi sintatticamente indipendenti e dotati di contenuto spaziale. Il mutamento a funzione aspettuale viene spiegato in riferimento alle restrizioni semantico-sintattiche rispetto al verbo
MORPHOLOGY IN ACTION: SOME ISSUES IN THE FORMATION OF THE LATIN PERFECT
No full textLo studio utilizza il framework dealla Nanosynatx per offrire un'analisi della formazione del perfetto latino; in particolare si spiegano le cancellazioni dei morfemi che formano il tema di infectum come conseguenza di restrizioni morfosintattiche predicibili all'interno della teoria
Gender Errors in Aphasia Reveal a Projection for Contextually Dependent Gender in Syntax
No full textThe amphipod assemblages of Sabellaria alveolata reefs from the NW coast of Portugal: An account of the present knowledge, new records, and some biogeographic considerations
No full textAmphipod assemblages associated with the biogenic reefs built by the honeycomb worm Sabellaria alveolata were studied at two sites (Praia da Aguda and Belinho) along the northwestern coast of Portugal. A total of 3909 specimens were collected, comprising 14 different amphipod species. A first record from the northeastern Atlantic coast was registered here for the species Caprella santosrosai, which was, up to now, recorded only along the Mediterranean coast of the Iberian Peninsula. A male specimen collected from the Sabellaria-reef located in Belinho allowed an update to the known distribution of C. santosrosai, thus altering its previous status as an endemic Mediterranean species. The most common species collected during the study were Microdeutopus chelifer (n = 1828), Jassa ocia (n = 1426), and Hyale stebbingi (n = 452). Forty-three percent of the total recorded species were encountered in both study sites, whereas the remaining 57 % were restricted to a single site (Belinho). The majority of the collected species (93 %) showed an Atlantic-Mediterranean distribution, confirming the close affinity between eastern Atlantic and Mediterranean amphipod assemblages and the role of the Portuguese coast as a transition zone through which numerous warm-water species, coming from North Africa and the Mediterranean Sea, could enter into the Atlantic and possibly get mixed with species coming from the North Sea and the Arctic, typically having affinity for colder waters
Symbiont dynamics during thermal acclimation using cnidarian-dinoflagellate model holobionts
No full textWarming oceans menace reef ecosystems by disrupting symbiosis between cnidarians and Symbiodinium zooxanthellae, thus triggering bleach episodes. Temperature fluctuations promote adjustments in physiological variables and symbiont composition, which can cause stress responses, but can also yield adaptation if fitter host–symbiont homeostasis are achieved. To understand such processes manipulative studies are required, but many reef-building cnidarians pose limitations to experimental prospects. We exposed Exaiptasia anemones to Gradual Thermal Stress (GTS) and Heat Shock (HS) exposures and monitored chlorophyll and symbiont dynamics to test the phenotypic plasticity of these photosynthetic holobionts. GTS enhanced chlorophyll concentrations and decreased Symbiodinium proliferation. A recovery period after GTS returned chlorophyll to lower concentrations and symbiont divisions to higher rates. HS triggered a stress response characterized by intense symbiont declines through degradation and expulsion, algal compensatory proliferation, and chlorophyll accumulation. Anemones pre-exposed to GTS displayed more acute signs of symbiont paucity after HS, demonstrating that recurrent stress does not always induce bleaching-resistance. Our study is the first documenting Symbiodinium C and D, along with the predominant Clade B1 in Exaiptasia anemones. C subclades found in outdoor specimens faded under laboratory exposures. Clade D emerged after HS treatments, and especially after GTS pre-exposure. This highlights the thermotolerance of D subclades found in E. pallida and shows that bleaching-recovery can involve shifts of background symbiont phylotypes. This study enlightens the capability of Exaiptasia anemones to acclimate to gradually increased temperatures, and explores into how thermal history influences in subsequent stress tolerance in symbiotic cnidarians
Comparison between epiphyte assemblages of leaves and rhizomes of the seagrass Posidonia oceanica subjected to different levels of anthropogenic eutrophication
No full textThis paper aimed to compare epiphyte assemblages of leaves and rhizomes of Posidonia oceanica exposed to different levels of concentration of nutrients. The same design including a potentially impacted meadow and two reference meadows was used in each of two locations, characterized by the presence of a city or of suspended cages of a fish farm, respectively. This allowed to test for the consistency of responses of epiphytic assemblages to different sources of eutrophication. In both studies, results documented differences in patterns of composition and abundance of epiphytic assemblages on leaves between disturbed and reference meadows, while assemblages on rhizomes did not appear sensitive to this kind of disturbance. Moreover, in potentially impacted meadows, both assemblages showed different patterns of spatial variability compared to reference assemblages. Species composition and abundance of epiphyte assemblages seemed suitable for detecting moderate nutrient increases, even if adequate sampling designs are needed to separate patterns related to the large natural spatial variability of these systems from those related to changes in environmental conditions
Comparison between epiphyte assemblages of leaves and rhizomes of the seagrass Posidonia oceanica subjected to different levels of anthropogenic eutrophication
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