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Trophic groups in the communities of soil nematodes in eight different landuse systems in the savannah Brazilian central region Grupos Troficos da Comunidade de Nematoides do Solo em oito Sistemas de Uso da Terra nos Cerrados do Brasil Central


Nematologia Brasileira. December; 303: 267-273
Trophic groups in the communities of soil nematodes in eight different landuse systems in the savannah Brazilian central region Grupos Troficos da Comunidade de Nematoides do Solo em oito Sistemas de Uso da Terra nos Cerrados do Brasil Central
Trophic groups of soil nematode communities were studied in eight different land use systems in the savannah of the central region of Brazil: 'cerrado', 'cerradao', 'gallery forest, 'native grassland', eucalypts, coffee, corn and tomato. Soils samples were collected from five different localities for each landuse system during the rainy season. Five replications for each location, and five soil cores composed one replication. Nematodes were counted for their total number in each sample, and 100 randomly picked individuals were identified to the generic level. The relative abundance of nematodes was processed to calculate trophic functions, trophic diversity, trophic dominance and decomposition pathway. These parameters were further submitted to statistical analysis though ANOVA program and Tukey test. In general, plant parasites and bacterial feeders dominated the nematode communities. The former group were prevalent in the four native systems, whereas the latter ones were on the crop systems, except corn. The lowest number of predators were found in tomato soil. Trophic diversity and trophic dominance distinguished native and cultivated systems, perennial and annual systems and also among annuals, corn and tomato. Tomato showed the lowest trophic diversity.

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Accession: 038852453



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