The relationship between sediment metal concentration and Odonata (Insecta) larvae assemblage structure in Cerrado streams

Autores/as

  • Cyntia Goulart Instituto Estadual de Florestas, Praça Tubal Vilela, 38400-186, Uberlândia, Minas Gerais, Brazil
  • Regina Célia Gonçalves Programa de Pós-Graduação em Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Av. Esperança, Campus Samambaia, 74690-900, Goiânia, Goiás, Brazil.
  • Ademir dos Santos Instituto de Química, Departamento de Química Analítica, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Prof. Francisco Degni, 14800-900, Araraquara, São Paulo, Brazil.
  • Kátia Gomes Facure Instituto de Ciências Exatas e Naturais do Pontal, Universidade Federal de Uberlândia, Rua 20, 1600, 38304- 402, Ituiutaba, Minas Gerais, Brazil.
  • Juliano José Corbi Escola de Engenharia de São Carlos, Universidade de São Paulo, Av. Trabalhador Sancarlense, 13566-590, São Carlos, São Paulo, Brazil
  • Giuliano Buzá Jacobucci Instituto de Biologia, Universidade Federal de Uberlândia, Rua Ceará, 38400-902, Uberlândia, Minas Gerais, Brazil.

Resumen

Metals can be incorporated into stream sediment affecting benthic invertebrate assemblages in different ways. Odonata larvae
have variable tolerances to metals; sublethal levels accumulated in larval tissue can indirectly influence assemblage structure in
environments with differences in types and concentrations of metals in the sediment. This research evaluated the relationship
between Odonata larvae assemblages and sediment metal content in Cerrado streams. We evaluated genus composition, abundance,
richness, Shannon-Wiener (H’) diversity index and Pielou’s evenness index (J’) of the assemblages from 12 streams.
Cluster analysis was used to identify groups of streams according to sediment concentrations of Cu (copper), Zn (zinc), Ni
(nickel), Fe (iron) and Mn (manganese). Canonical Redundancy Analysis (RDA) and Canonical Correspondence Analysis
(CCA) were performed to determine how metals influence Odonata assemblage metrics. Cluster analysis revealed three distinct
groups of streams according to metal concentration in the sediment. RDA showed a negative relation between Pielou evenness
(J’) and the concentration of Ni, Cu, Zn and Mn, while abundance, genus richness and Shannon-Wiener diversity were positively
related with Fe. CCA indicated that some taxa showed an opposite relation with metal concentration, but others were more
abundant in streams subjected to high metal concentrations. Although the increase in iron concentration in streams can lead to
an increase in the abundance of Odonata larvae, high concentrations of coper, zinc and manganese can lead to a reduction in
taxon evenness.

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Publicado

2022-06-20

Número

Vol. 41 Núm. 1 (2022): Limnetica

Sección

Research Paper

Licencia

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