Demography of Grazed Tussock Grass Populations in Patagonia
نویسندگان
چکیده
منابع مشابه
Lamb performance from grazed grass in 2013
In mid-season prime lamb production it is essential to optimise lamb performance from grazed pasture to minimise costs and so improve margins from sheep production. This is achieved by continuously supplying high feed value herbage for the duration of the grazing season. Feed value is a combination of nutritive value (i.e. digestibility) and intake characteristics (which is a combination of her...
متن کاملSpatiotemporal Genetic Structure within White Clover Populations in Grazed Swards
tion of rare seedling recruitment and clonal growth (Barrett and Silander, 1992; Chapman, 1983; Fothergill White clover (Trifolium repens L.) populations exhibit high genetic et al., 1997; Grime et al., 1988). In addition, somatic and clonal diversity, but often exist for many decades in grazed swards at northern midlatitudes. This study was conducted to determine mutations during vegetative pr...
متن کاملThe structured demography of open populations in fluctuating environments
1. At the spatial scale relevant to many field studies and management policies, populations may experience more external recruitment than internal recruitment. These sources of recruitment, as well as local demography, are often subject to stochastic fluctuations in environmental conditions. Here, we introduce a class of stochastic models accounting for these complexities and provide analytic m...
متن کاملGrazed grass herbage intake and performance of beef heifers with predetermined phenotypic residual feed intake classification.
Data were collected on 85 Simmental and Simmental × Holstein-Friesian heifers. During the indoor winter period, they were offered grass silage ad libitum and 2 kg of concentrate daily, and individual dry matter intake (DMI) and growth was recorded over 84 days. Individual grass herbage DMI was determined at pasture over a 6-day period, using the n-alkane technique. Body condition score, skeleta...
متن کاملDemography and ecology drive variation in cooperation across human populations.
Recent studies argue that cross-cultural variation in human cooperation supports cultural group selection models of the evolution of large-scale cooperation. However, these studies confound cultural and environmental differences between populations by predominantly sampling one population per society. Here, we test the hypothesis that behavioral variation between populations is driven by enviro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Rangeland Ecology & Management
سال: 2005
ISSN: 1550-7424,1551-5028
DOI: 10.2111/1551-5028(2005)58[466:dogtgp]2.0.co;2