Conclusions

Protozoa and nematodes are pivotal organisms in agroecosystems because their predation upon bacteria increases mineralization of nutrients necessary for plant growth. Since biodiversity stabilizes community and ecosystem processes (Tilman, 1996), maintaining and increasing protozoan biodiversity will contribute to more sustainable agriculture. Ecofarming and organic fertilizer management enhance protozoan activity.

Protozoa have several unique features, such as rapid sensitivity to environmental changes and ubiquity, that favor their use as bioindicators. Protozoan biodiversity reflects the condition of an agroecosystem and can be used to monitor the effects of environmental changes.

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