Search results for "GRAS"
showing 10 items of 727 documents
Digestion of bamboo compared to grass and lucerne in a small hindgut fermenting herbivore, the guinea pig (Cavia porcellus)
2022
Bamboo is an enigmatic forage, representing a niche food for pandas and bamboo lemurs. Bamboo might not represent a suitable forage for herbivores relying on fermentative digestion, potentially due to its low fermentability. To test this hypothesis, guinea pigs (n = 36) were used as model species and fed ad libitum with one of three forages (bamboo, lucerne, or timothy grass) in a fresh or dried state, with six individuals per group, for 3 weeks. The nutrient composition and in vitro fermentation profile of bamboo displayed low fermentation potential, i.e. high lignin and silica levels together with a gas production (Hohenheim gas test) at 12 h of only 36% of that of lucerne and grass. Alth…
Grasslands of Northern Europe and the Baltic States
2020
This chapter deals with the grasslands of Northern Europe (Denmark, Faroe Islands, Finland, Iceland, Norway, Sweden) and the Baltic States (Estonia, Latvia, Lithuania), with a focus on natural and semi-natural grasslands of the lowlands, thus treating arctic-alpine and strongly intensified types only marginally. At present, grasslands cover ca. 7% of the study region, half of which are natural grasslands (mostly arctic-alpine, to a smaller extent also azonal and extra-zonal) and the other half secondary grasslands created by human land use (livestock grazing or haymaking). Both grassland categories have high importance for biodiversity in many taxa. However, particularly the secondary grass…
Soil feedback does not explain mowing effects on vegetation structure in a semi-natural grassland
2009
Due to its ability to create aboveground conditions that favour plant diversity, mowing is often used to preserve the high conservation value of semi-natural species-rich grasslands. However, mowing can also affect belowground conditions. By decreasing plant carbon supply to soil, mowing can suppress the activity of soil decomposers, diminish plant nutrient availability and thus create a feedback on plant growth. In this study, we first documented the effects of three-year mowing on plant community structure in a species-rich grassland. We found that mowing decreased the total areal cover of woody plants and increased the total cover of leguminous forbs. At the species level, mowing further…
Influence of land-use intensity on the spatial distribution of N-cycling microorganisms in grassland soils
2011
A geostatistical approach using replicated grassland sites (10 m × 10 m) was applied to investigate the influence of grassland management, i.e. unfertilized pastures and fertilized mown meadows representing low and high land-use intensity (LUI), on soil biogeochemical properties and spatial distributions of ammonia-oxidizing and denitrifying microorganisms in soil. Spatial autocorrelations of the different N-cycling communities ranged between 1.4 and 7.6 m for ammonia oxidizers and from 0.3 m for nosZ-type denitrifiers to scales >14 m for nirK-type denitrifiers. The spatial heterogeneity of ammonia oxidizers and nirS-type denitrifiers increased in high LUI, but decreased for biogeochemical …
Turnover and availability of soil organic carbon under different Mediterranean land-uses as estimated by13C natural abundance
2013
Summary Soil organic matter (SOM) is an important factor in ecosystem stability and productivity. This is especially the case for Mediterranean soils suffering from the impact of human degradation as well as harsh climatic conditions. We used the carbon (C) exchange resulting from C3-C4 and C4-C3 vegetation change under field conditions combined with incubations under controlled conditions to evaluate the turnover and availability of soil organic C under different land-uses. The 40-year succession of Hyparrenia hirta L. (C4 photosynthesis) after more than 85 years of olive tree (Olea europaea L.; C3 photosynthesis) growth led to the exchange of 54% of soil organic C from C3 to C4 forms. In …
Adventures of Clinical Psychology
2021
Clinical psychology strives to fully grasp the person in his totality and in his individuality, helping him adequately address his own deep internal suffering and discomfort, social uneasiness, and harmonize his own needs, desires and, attachments [...]
Estrategias de migración del género Acrocephalus en la Península Ibérica
2014
El objetivo de esta tesis es profundizar en el conocimiento de las estrategias migratorias de las aves del género Acrocephalus, el carricero común A. scirpaceus y el carricerín común A. shoenobaenus, durante la migración de otoño en la Península Ibérica. Su estudio se aborda a dos niveles: por un lado, la organización espacial de la migración a nivel peninsular y por otro el comportamiento en las áreas de descanso. A nivel peninsular, se observa que los carriceros que pasaron por la zona oeste peninsular presentaron alas más cortas que los carriceros capturados en el centro y este peninsular, sugiriendo que las aves que migran a través de la ruta oeste migran distancias más cortas, lo que e…
El cultivo del olivo y la producción oleícola entre el Neolítico y el Imperio romano, el caso particular de la península ibérica
2015
La cultura del olivo y la producción de aceite, del Neolítico al Imperio romano: el caso particular de la península Ibérica. Mediante este título son puestos de manifiesto los dos ejes principales de esta investigación. El primero retoma la cuestión de la domesticación de la planta, la cual habría tenido lugar en las llamadas “zonas refugio”, espacios climatológicamente protegidos de la cuenca mediterránea. El segundo, trata de manera particular la aparición de las diferentes tecnologías de producción oleícola, su evolución, así como las herencias observadas entre los diferentes pueblos del Mediterráneo, entre el Neolítico y el Imperio romano. Ambas problemáticas son analizadas desde el cas…
Síndromes rares en psicopatologia: revisió bibliogràfica i anàlisi bibliomètrica
2016
espanolLos denominados «sindromes raros» son aquellos que por su etiologia, casuistica, sintomas peculiares o escasa prevalencia poblacional no suelen ser abordados por la literatura cientifica. El objetivo del presente trabajo ha sido realizar una revision bibliografica y un analisis bibliometrico de las publicaciones cientificas que desde 1970 hasta la actualidad se han llevado a cabo en relacion a cuatro de estos sindromes: sindrome de Capgras, sindrome de Cotard, sindrome de Munchausen y Folie a deux. A partir de la consulta de las bases de datos PsycoDOC, PsycINFO y SCOPUS se presentan los resultados obtenidos sobre las caracteristicas clinicas, la epidemiologia, el curso, la comorbili…