Resumo

DIAZ, C.; BELMONTE, M. C. Fernández; VETTORELLO, C. I.  e  APEZTEGUIA, H. P.. Identificación de cianobacterias en suelos de la región noreste de la provincia de Córdoba, Argentina. Agriscientia [online]. 2022, vol.39, n.2, pp.4-4. ISSN 1668-298X.  http://dx.doi.org/10.31047/1668.298x.v39.n2.34491.

The expansion of the agricultural frontier causes losses of biodiversity and native genetic resources, affecting the sustainability of the ecosystem. The presence and diversity of cyanobacteria are considered to be bioindicators sensitive to land use change. The objective of this work was to characterize the communities of cyanobacteria present in the soils in the northeast of the province of Córdoba, comparing soils with implanted pastures and in pristine conditions. Soil samples were taken in three locations, in environments with different levels of salinity: mild, modérate and saline. The samples were cultured in Watanabe medium, under controlled conditions to promote the growth of cyanobacteria. An Olympus BX 50 optical microscope was used for taxonomic identification. It was possible to identify the species of cyanobacteria present at each site, observing a dominance of heterocyst nitrogen fixators in soils with higher salinity. In turn, in the three native forests present at each site, greater species richness was observed. The most sensitive to the change in land use being OscHlator¡a Hmosa and Phormidium constricta. Cyanobacteria constitute a future line of research related to the restoration and productive recovery of saline environments, under the focus of sustaining biodiversity.

Palavras-chave : saline soils; sustainability; biological recovery.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )