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

Author(s)

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]

Affiliation

^[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

• Document type: Journal article
• Source: LIMNOLOGY; v. 19, n. 2, p. 171-176, APR 2018.
• Web of Science Citations: 0

Abstract

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)

• FAPESP's process: 12/21829-0 - ANAEROBIC DECOMPOSITION OF REFRACTORY ORGANIC MATTER IN DIFFERENT TROPHIC CONDITIONS
• Grantee: Flávia Bottino
• Support Opportunities: Scholarships in Brazil - Post-Doctoral