نتایج جستجو برای: annual forbs
تعداد نتایج: 110865 فیلتر نتایج به سال:
BACKGROUND Transparent calculation methods are crucial when investigating trends in antimicrobial consumption over time and between populations. Until 2011, one single standardized method was applied when quantifying the Danish pig antimicrobial consumption with the unit "Animal Daily Dose" (ADD). However, two new methods for assigning values for ADDs have recently emerged, one implemented by D...
High plant functional group diversity has been hypothesized to reduce resource concentrations based on the assumption that species from one functional group acquire resources similarly to one another, while species from other functional groups acquire resources dissimilarly. To determine if functional groups use soil nutrients different from one another, we investigated the impact of removing i...
Over eight years we measured the effects of plant community composition, vegetation structure, and livestock grazing on occurrence of three grassland bird species-Western Meadowlark (Sturnella neglecta), Horned Lark (Eremophila alpestris), and Grasshopper Sparrow (Ammodramus savannarum)-at sites in central California during breeding season. In California's Mediterranean-type climatic region, co...
Emeritus Professor Alan Glasper, from the University of Southampton, discusses the Care Quality Commission's annual report looking at health and social care in England.
Presents a summary report of journal operations compiled from the 2016 annual reports of the Council of Editors and from Central Office records. Also includes a summary report of division journal operations compiled from the 2016 annual reports of the division journal editors. (PsycINFO Database Record
Quantitatively estimating the grazing intensity (GI) effects on vegetation in semiarid hilly grassland of Loess Plateau can help to develop safe utilization levels for natural grasslands, which is a necessity maintaining livestock production and sustainable development grasslands. Normalized difference index (NDVI), field data, 181 days (one goat per day) GPS tracking were combined quantify spa...
Big sagebrush (Artemisia tridentata Nutt.) occupies large portions of the western United States and provides valuable wildlife habitat. However, information is lacking quantifying differences in native perennial forb characteristics between mountain big sagebrush [A. tridentata spp. vaseyana (Rydb.) Beetle] and Wyoming big sagebrush [A. tridentata spp. wyomingensis (Beetle & A. Young) S.L. Wels...
Woody vegetation encroachment in natural grasslands is a concern in many parts of the world. We evaluated the effect of Baccharis uncinella (Asteraceae) encroachment on grassland vegetation in southern Brazil, in terms of plant composition and richness. We conducted a vegetation survey in 12 plots of 10 × 10 m. The study site was a forest-grassland mosaic where management practices have been ex...
Germination response to fluctuating temperatures is a mechanism by which seeds detect gaps in vegetation canopies and depth of burial in soil, and it is very important for plants. Thus, studies on the effect of fluctuating temperature on germination at the community level are valuable for understanding community structure and biodiversity maintenance. We determined the effects of two alternatin...
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