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- W1984017315 abstract "This paper emphasizes some aspects of soil protozoology related to agriculture, viz. farming systems, biocides, and biodiversity. Ecofarming slightly increases abundances and biomasses of soil protozoa and stimulates soil life in general. Agroecosystems are more sensitive to conventional farming practices than grasslands, especially under severe climatic conditions, e.g. water stress. The increased soil life under ecofarming is not associated with an increased crop yield. In contrast, yield decreases more or less distinctly. However, the yield loss is usually partially or completely compensated by the reduced operating expenses (energy input) per crop unit. Thus, ecofarming appears to be a useful practice, especially for sustaining biodiversity. The effects of biocides on soil protozoa can be summarized as follows: (1) The general pattern of reaction of soil protozoa to biocide stress is the same as that of other organisms; (2) Many protozoan species seem to be just as sensitive to pesticides as other more commonly used test organisms; (3) Insecticides are usually more toxic than herbicides and disturb soil protozoa critically, i.e. populations often do not fully recover within 60 days; (4) Fungicides have rather varied effects but most of them very likely do not influence soil protozoa critically. There is still a great need for comprehensive, well-designed field studies on the effects of biocides on soil protozoa, especially testate amoebae. Literature on protozoan species diversity in agroecosystems is sparse, highly scattered, and burdened with misidentifications. Our own data indicate that species richness of ciliates is usually only slightly decreased, and is sometimes even higher, in agroecosystems as compared with neighbouring natural biotopes. This contrasts with species richness of testate amoebae, which is invariably and distinctly (≥ 50%) reduced by agriculture, leaving an impoverished version of the original, much more diverse community. Testate amoebae are thus highly sensitive bioindicators in agroecosystems." @default.
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- W1984017315 date "1997-04-01" @default.
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- W1984017315 title "Protozoa as bioindicators in agroecosystems, with emphasis on farming practices, biocides, and biodiversity" @default.
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- W1984017315 doi "https://doi.org/10.1016/s0167-8809(96)01142-5" @default.
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