Effects of macrophyte leachate on Anabaena sp and Chlamydomonas moewusii growth in freshwater tropical ecosystems

Autor(es)

Bottino, Flavia ^[1] ; Vargas, Sarah Regina ^[1] ; Poli Miwa, Adriana Cristina ^[1] ; Calijuri, Maria do Carmo ^[1] ; Bianchini, Jr., Irineu ^[2] ; Fernandes Cunha, Davi Gasparini ^[1]

Afiliação do(s) autor(es)

^[1] Escola Engn Sao Carlos, Dept Hidraul & Saneamento, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Hidrobiol, Rodovia Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: LIMNOLOGY; v. 19, n. 2, p. 171-176, APR 2018.
• Citações Web of Science: 0

Resumo

This study reports on the effects of dissolved organic matter (DOM) derived from the aquatic macrophyte Pistia stratiotes (collected from a tropical reservoir) on the mixotrophic growth of two phytoplankton species (Chlamydomonas moewusii and Anabaena sp.). The DOM from P. stratiotes had a mainly aliphatic structure, low molecular weight, low cellulose and lignin content and high carbon content. The addition of DOM (5% v/v) significantly decreased the growth rate of Anabaena sp. but increased the chlorophyll a concentration of C. moewusii. Higher light intensity (100 versus 30 A mu mol m(-2) s(-1)) was important for Anabaena sp., increasing its growth rate and chlorophyll content. The use of DOM from P. stratiotes to mitigate cyanobacterial blooms should be further explored in future studies. (AU)

• Processo FAPESP: 12/21829-0 - Decomposição anaeróbia da matéria orgânica refratária em diferentes condições de trofia
• Beneficiário: Flávia Bottino
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado