Search results for "SID"
showing 10 items of 6756 documents
Los foros y las redes sociales ayudan a descubrir especies exóticas en Europa y monitorear su propagación: el caso de Exaireta spinigera (Wiedemann, …
2018
La mosca soldado Exaireta spinigera (Wiedemann, 1830) (Diptera, Stratiomyidae) es originaria de Australia y se introdujo en Hawái, América del Norte y se está extendiendo rápidamente por Europa. Comentamos el conocimiento sobre su presencia en Italia y publicamos los primeros registros de Sicilia. El conocimiento existente sobre la llegada y distribución de esta especie en Italia se fundamenta exclusivamente en datos proporcionados por ciudadanos a través de foros de internet y grupos de Facebook sobre biodiversidad, que así han demostrado ser una ayuda útil para la difícil detección de especies invasoras.
Lewinskya transcaucasica(Orthotrichaceae, Bryopsida)sp. nov. A contribution to the bryophyte flora of Georgia
2017
A new orthotrichaceous species, Lewinskya transcaucasica Eckstein, Garilleti & F.Lara, is described, based on several samples collected in the Georgian territories of Greater Caucasus and Lesser Ca...
Lewinskya lamyanasp. nov. (Orthotrichaceae, Bryopsida), a Distinct Moss from an Exceptional Habitat in the Southern Iberian Peninsula
2018
A new species, Lewinskya lamyana F.Lara, Garilleti, Draper & Mazimpaka, is described. It is a mainly epiphytic moss, so far exclusively found in southernmost Spain on the summit area of Sierra Bermeja, a coastal mountain, which is exceptional in several environmental aspects. The new moss is characterized by a set of morphological traits, most of them easily observed: medium to large plants; leaves lanceolate and acuminate with recurved margins; calyptra campanulate with scattered stout hairs; capsule fully immersed, brown, cylindrical, with 8 broad and prominent ribs; exostome of 8 pairs of teeth easily splitting, all fused basally in a continuous low ring; teeth opaque, cream-coloured, re…
Antioxidant activity and enzymes inhibitory properties of several extracts from two Moroccan Asteraceae species
2018
Abstract The present work reports investigation on phenolic compounds, antioxidant activity and enzyme inhibitory activities (acetylcholinesterase, butyrylcholinesterase, tyrosinase, α-amylase and α-glucosidase) of different extracts from two Moroccan Asteraceae species; Bubonium imbricatum Cav. and Cladanthus arabicus (L.) Cass. B. imbricatum extracts contained the highest amounts of phenolics and flavonoids, and also exhibited higher antioxidant activity. In this species, the highest total phenolic (1611.13 ± 14.23 μmolGAE/gextract) and flavonoid (376.11 ± 8.22 μmolQE/gextract) contents were observed in aqueous-methanol extract obtained by maceration. Further, UHPLC–MS analysis of C. arab…
Influence of pulsed electric field processing on the quality of fruit juice beverages sweetened with Stevia rebaudiana
2017
Abstract A fruit juice-stevia beverage was processed using pulsed electric fields (PEF), a non-thermal preservation technology, with the purpose of investigating the feasibility of PEF for bioactive compounds and steviol glycosides enhancement and its impact on physicochemical properties. Variable ranges of response surface methodology were 20–40 kV/cm (electric field strength), 100–360 μs (treatment time) and 0–2.5% (w/v) stevia. After PEF, ascorbic acid was retained by more than 74%. Some of the analyzed PEF treatments resulted in an enhancement of total anthocyanins and carotenoids. The best results for rebaudioside A/stevioside ratio were obtained when PEF was applied at 30 kV/cm for 23…
Isolation of a novel linalool disaccharide glycoside from Raspberry fruit
1991
Abstract A new linalool disaccharide glycoside ( 1a ) was isolated from raspberry fruit ( Rubus idaeus , cv. Heritage) and characterized as S-(+)-linalool 3-O-α-L-arabinopyranosyl-(1→6)-β-D-glucopyranoside by means of spectroscopic studies.
Cost-efficient strategies to preserve dead wood-dependent species in a managed forest landscape
2016
Negative consequences of intensive forest management on biodiversity are often mitigated by setting aside old forest, but alternative strategies have been suggested. We have compared using simulations the consequences of two of these alternatives setting aside young forests or extending rotation periods - to that of current practice in managed boreal forest In all scenarios we applied a constant conservation budget and predicted forest development and harvesting over 200 years. As a proxy for biodiversity conservation, we projected the extinction risk of a dead wood-dependent beetle, Diacanthous undulatus, in a 50 km(2) landscape in central Sweden, using a colonization-extinction model. Dur…
Resilience of the seagrass Posidonia oceanica following pulse-type disturbance.
2020
Understanding the response of species to disturbance and the ability to recover is crucial for preventing their potential collapse and ecosystem phase shifts. Explosive submarine activity, occurring in shallow volcanic vents, can be considered as a natural pulse disturbance, due to its suddenness and high intensity, potentially affecting nearby species and ecosystems. Here, we present the response of Posidonia oceanica, a long-lived seagrass, to an exceptional submarine volcanic explosion, which occurred in the Aeolian Archipelago (Italy, Mediterranean Sea) in 2002, and evaluate its resilience in terms of time required to recover after such a pulse event. The study was carried out in 2011 i…
Population Trends of Cave-Dwelling Bats in the Eastern Iberian Peninsula and the Effect of Protecting Their Roosts
2017
Populations trends of cave-dwelling bats in the Eastern Iberian Peninsula and the effect of placing a perimeter fencing around their roosts (to avoid human disturbance on breeding colonies) were evaluated from 1997 to 2014. The species with the highest relative abundance was Miniopterus schreibersii (62.4%), followed by Myotis myotis/blythii (18%), and both populations showed positive trends. On the other hand, Myotis capaccinii (6.2%), M. escalerai (4.8%) and M. emarginatus (0.9%) showed significant, but minor increases, particularly in recent years. Rhinolophus mehelyi (0.2%) displayed no significant trends, while a moderate population decline was recorded for R. euryale (5.1%). Rhinoloph…
Sex pheromones and trail-following pheromone in the basal termites Zootermopsis nevadensis (Hagen) and Z. angusticollis (Hagen) (Isoptera: Termopsida…
2010
In the context of an evolutionary study of the chemical communication in termites, sex pheromones and trail-following pheromones were investigated in two Termopsidae, Zootermopsis nevadensis and Z. angusticollis. In these species, in which the presence of sex-specific pheromones has been demonstrated previously, the chemical structure of the female sex pheromone has now been identified as (5E)-2,6,10-trimethylundeca-5,9-dienal and the male sex pheromone as (+)- or (-)-syn-4,6-dimethyldodecanal. The amount of sex pheromone was estimated at 5-10 ng per individual in females and 2-5 ng in males. Because these two sympatric species do not differ in their pheromonal chemical composition, reprodu…