Sample sufficiency for environmental impact studies on benthic macroinvertebrate community in irrigated rice fields

Ciência Rural

Avila, Luis Antonio de¹  Baumart, Joele Schmitt²  Soares, Camille Flores⁴  Santos, Sandro²  Marchesan, Enio⁴  Pires, Mateus Marques³  Wandscheer, Alana Cristina Dorneles⁴ 

[1] Universidade Federal de Pelotas, Pelotas, Brazil;UFSM, Santa Maria, Brazil;Universidade do Vale do Rio dos Sinos, São Leopoldo, Brazil;Universidade Federal de Santa Maria, Santa Maria, Brazil

关键词:  collector curve;    sampling;    diversity indices;    aquatic invertebratesMacroinvertebrados bentônicos são organismos que habitam os substratos de fundo nos habitats de água doce;    ao menos parte do seu ciclo de vida;    e que podem ser retidos em peneira de malha ≥200 a 500µm (ROSENBERG & RESH;    1993);    representados por espécies de Insecta;    Annelida;    Nemertinea;    Crustacea;    Mollusca e alguns Turbellaria e Bryozoa (KUHLMANN et al;   

DOI  :  10.1590/0103-8478cr20131218

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

:The objective of this study was to determine the sample sufficiency in environmental impact studies on the benthic macroinvertebrate community in irrigated rice fields (Oryza sativa L.). Soil samplings were conducted with a cylindrical collector in the agricultural years of 2007/08 and 2012/13. Individuals were sorted out and identified up to family level. Data were analyzed through the collector curve, Shannon's Diversity and Pielou's Evenness Index were calculated for the total number of samples and the number of samples defined by the collector curve in each year. Considering the results observed in this study, we indicate a minimum of 12 replicates to obtain the largest number of families without loss of information, in environmental impact studies on benthic macroinvertebrate community in irrigated rice fields.

【 授权许可】

Unknown