نتایج جستجو برای: rangeland health condition
تعداد نتایج: 1266231 فیلتر نتایج به سال:
Invasive plants reduce the capacity of ecosystems to provide goods and services required by society, alter ecological processes, and can displace desirable species. They can reduce wildlife habitat quality, riparian area integrity, rangeland economic value, and enterprise net returns. The invasion process is regulated by characteristics of the invading plant and the community being invaded. The...
Soil characteristics and functions are critical determinants of rangeland systems and the ecosystem services that they provide. Rangeland soils are extremely diverse, but an emerging understanding is that paradigms developed in more mesic forest ecosystems may not be applicable. Vascular plants, biological soil crusts, and the soil microbial community are the three major functional groups of or...
..........................................................................................................45 INTRODUCTION .................................................................................................46 METHODS ............................................................................................................51 RESULTS ...................................................
We conducted a 5-year study on the impact of nutrients, depending on stream and season. grazing on stream-channel bare ground and erosion, and a © CSA 3-year study of cattle-trail erosion on intermittent stream channels draining grazed oak (Quercus)-woodland 450. Correlations of stocking with the cryptogamic soil watersheds. These studies were conducted on the San crust of a semi-arid rangeland...
background: mobile health is one of the new technologies for the utilization of health information. for its successful implementation as well as any other system, we must primarily measure the adoption and use of its factors. the purpose of this study was to systematically investigate published articles about the factors affecting the adoption of mobile health and categorizing the factors affec...
In order to investigate the effects of range management plans on species diversity, richness and evenness in Semirum rangelands, 52 sites (28 with treated plan and 24 without treated plan) were selected. The non-parametric indices for species richness (Margalof, Menhinick, Jacknife and counting method) and species diversity (Simpson, Camargo, Smith and Wilson and modified Nee) were compared in ...
Growth data were collected over 4 yr from 349 Brahman-Hereford F1, first-calf, lactating females that had been allotted as weanlings to either semiarid extensive rangeland (Uvalde) or humid improved Bermudagrass pasture (Overton) and to one of four herbage allowance levels at each location as yearlings. Heifers were wintered according to systems in local practice and maintained on allotted fora...
When choosing which environmental attributes to monitor in assessing disturbance, it is important to consider not onlywhichmetric will provide themost sensitive indicator of disturbance, but also the spatial considerations of where in the landscape thatmetric will bemost responsive to change.Degradation in landscapes is often unevenly expressed because: (i) disturbance is spatially localised, (...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید