Small-scale Management System Research Articles

“Everyone does it a bit differently!”: Evidence for a positive relationship between micro-scale land-use diversity and plant diversity in hay meadows

High nature-value grasslands including mountain hay meadows are among the most species-rich habitats in Europe. Mountain hay meadows were developed and maintained by traditional, small-scale management systems having high micro-scale land-use diversity (MSLUD), i.e. the parcel-scale diversity of management elements which usually depend on individual decisions and family traditions of local farmers. Detailed studies documenting the effects of micro-scale land-use diversity on vegetation are absent. The main objectives of our study were to analyse the effect of micro-scale land-use diversity and evenness on local plant diversity and cover of the main plant functional types. Field work was carried out in the Gyimes region (Eastern Carpathians, Romania).We conducted semi-structured interviews with the owners and managers of the studied meadow parcels in order to reveal the number of applied management elements (Nm) and applied frequencies of these management elements (e.g. manuring, mowing, seed sowing and weed control) per parcel and to determine the three differently used hay meadow types from interviews. For quantifying MSLUD, the Shannon diversity formula was used, in the case of micro-scale land-use evenness (MSLUE), the original Pielou’s evenness formula was applied. To document parcel-scale vegetation features, 4 × 4-meter quadrats were surveyed in every parcel.We found significant differences in the Nm, MSLUD and MSLUE among the three management types. In models where MSLUD, MSLUE and Nm were built in, we got better model fits and more parsimonious models than in cases where just management type was built into the models. Management elements (e.g. manuring, seed sowing) also had a significant effect on vegetation.Our results highlight that micro-scale land-use diversity plays a significant role in the maintenance of plant diversity in traditional, small-scale farming systems. The main drivers behind the high micro-scale land-use diversity may be farmers’ personal decisions and family traditions. We argue that for an adequate ecological understanding and conservation of these traditional, small-scale land-use systems, the development of adequate ways of evaluation as well as detailed studies of the effects of several different management elements and land-use diversity on vegetation are needed.

Intestinal Protozoan Parasites of Pigs Reared Under Different Management Systems in Morogoro, Tanzania

Abstract Esrony, K., Kambarage, D.M., Mtambo, M.M.A., Muhairwa, A.P. and Kusiluka, L.J.M. 1996. Intestinal protozoan parasites of pigs reared under different management systems in Morogoro, Tanzania. J. Appl. Anim. Res., 10: 25–31. Sixty three piggery units with a total herd size of 424 pigs in the small-scale and semi-intensive management systems from semi arid and tropical highland areas of Morogoro region were screened for intestinal protozoan parasites. Thirtysix percent of the screened animals were positive for eimeriosis and 7.8% for cryptosporidiosis. Prevalences of eimeriosis in the semi-intensive and small-scale management systems were 22% and 48%, respectively. High prevalences of eimeriosis and cryptosporidiosis (60% and 25%, respectively) were observed in the tropical highland climate area (Mgeta) and low rates (26% and 0.3%, respectively) were evident in the semi-arid zone. Ninety five per cent of infected pigs excreted between 100 and 5000 OPG and five per cent were excreting more than 5000 ...