Search results for "Alpi"

Trend of inter-arrival times of rainfall events for Italian Sub-Alpine and Mediterranean areas

2011

Lake size and fish diversity determine resource use and trophic position of a top predator in high-latitude lakes

2015

Prey preference of top predators and energy flow across habitat boundaries are of fundamental importance for structure and function of aquatic and terrestrial ecosystems, as they may have strong effects on production, species diversity, and food-web stability. In lakes, littoral and pelagic food-web compartments are typically coupled and controlled by generalist fish top predators. However, the extent and determinants of such coupling remains a topical area of ecological research and is largely unknown in oligotrophic high-latitude lakes. We analyzed food-web structure and resource use by a generalist top predator, the Arctic charr Salvelinus alpinus (L.), in 17 oligotrophic subarctic lakes…

SELVICOLTURA ALPINA E SELVICOLTURA APPENNINICA: ELEMENTI DI CONTATTO E DI DIFFERENZIAZIONE

2009

Riassunto Il rapporto tra boschi e popolazioni locali sulle Alpi come sugli Appennini, seppur in momenti storici differenti, è stato caratterizzato dalla distruzione e sfruttamento intensivo, protrattisi fino alla metà del secolo scorso, cui hanno fatto seguito la ricostituzione sia mediante rimboschimenti sia con il miglioramento dei boschi esistenti. Partendo dai presupposti sui quali si è imperniata l’attività forestale che ha caratterizzato, nel corso degli ultimi cinquant’anni, l’approccio selvicolturale nei due contesti e da una puntuale e documentata analisi, nel lavoro vengono evidenziati gli elementi di differenziazione tra la selvicoltura naturalistica applicata in ambiente alpino…

TALPID3/KIAA0586 Regulates Multiple Aspects of Neuromuscular Patterning During Gastrointestinal Development in Animal Models and Human

2021

TALPID3/KIAA0586 is an evolutionary conserved protein, which plays an essential role in protein trafficking. Its role during gastrointestinal (GI) and enteric nervous system (ENS) development has not been studied previously. Here, we analyzed chicken, mouse and human embryonic GI tissues with TALPID3 mutations. The GI tract of TALPID3 chicken embryos was shortened and malformed. Histologically, the gut smooth muscle was mispatterned and enteric neural crest cells were scattered throughout the gut wall. Analysis of the Hedgehog pathway and gut extracellular matrix provided causative reasons for these defects. Interestingly, chicken intra-species grafting experiments and a conditional knockou…

Labile nitrogen, carbon, and phosphorus pools and nitrogen mineralization and immobilization rates at low temperatures in seasonally snow-covered soi…

2006

Surface mineral horizons from four ecosystems sampled in the northwestern Italian Alps were incubated at −3 and +3°C to simulate subnivial and early thaw period temperatures for a seasonally snow-covered area. The soil profiles at these sites represent extreme examples of management, grazed meadow (site M) and extensive grazing beneath larch (site L) or naturally disturbed by avalanche and colonized by alder (site A) and the expected forest climax vegetation beneath fir (site F). Changes in labile pools of nitrogen (N) and phosphorus (P) were active at all sites at both temperatures during 14 days of laboratory incubation. Ammonium was the dominant inorganic form of total dissolved N (TDN),…

Dependence of Arctic char (Salvelinus alpinus L.) on littoral and pelagic energy sources in a subarctic lake, Saanajärvi

2007

"Kamala loppu surkealle elämälle" : itsemurhat uutisartikkeleissa 1880-1899

2016

1800-luvun lopussa tilastotiede kehittyi ja itsemurhia ryhdyttiin systemaattisesti kirjaamaan eri instansseihin. Itsemurhia tehtiin ja niistä käytiin julkista keskustelua kiihtyvään tahtiin. Asenteet itsemurhaa kohtaan olivat murrostilassa. Aikalaiset suhtautuivat tekoon ristiriitaisesti. Joissakin tapauksissa teko aiheutti sääliä, pelkoa ja hämmennystä, kun taas joitakin itsemurhia käsiteltiin suopeasti ja niitä jopa ymmärrettiin. Yhteiskunnan maallistuminen ja modernisaatio aiheuttivat katsantokantojen lieventymistä niin itsemurhia kuin niiden tekijöitä kohtaan. Tutkimuksessani käsittelen 1800-luvun lopussa itsemurhiin suhtautumista tarkastelemalla kolmen sanomalehden itsemurha-artikkelei…

Les effets de l’EPS pour les chasseurs alpins

2020

International audience

Augšējā krīta kaļķakmeņi Untersberga kalna apkārtnē, Alpos: sastāvs, uzbūve un sedimentācijas apstākļu interpretācija

2015

Klievēns E., 2015. Augšējā krīta kaļķakmeņi Untersberga kalna apkartnē, Alpos: sastāvs, uzbūve un sedimentācijas apstākļu interpretācija. Maģistra darbs. Rīga, Latvijas Universitāte. 67 lpp.Maģistra darbā ir raksturots Untersberga kalna apkārtnē esošo augšējā krīta kaļķakmeņu sastāvs, uzbūve un sedimentācijas apstākļi. Darbā veikta zinātniskās literatūras analīze, kaļķakmeņu pieslīpņu un plānslīpējumu izgatavošana, sagatavotā kaļķakmens materiāla fotoskenēšana un datu kamerālā apstrāde, kaļķakmeņu uzbūves un komponentu identifikācija, un aprakstīšana, fāciju un fāciju asociāciju nodalīšana, pētīto kaļķakmeņu veidošanās apstākļu interpretācija. Secināts, ka kaļķakmeņi no Kīferas atradnes lie…