Effects of artificial substratum types and exposure time on macroalgal colonization in a tropical stream

Autor(es)

Branco, Ciro C. Z. ^[1] ; Necchi, Jr., Orlando ^[2] ; Peres, Cleto K. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, UNESP, Dept Biol Sci, Lab Aquat Biol, BR-19806900 Assis, SP - Brazil

^[2] Sao Paulo State Univ, UNESP, Dept Bot & Zool, Lab Phycol, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Fundamental and Applied Limnology; v. 178, n. 1, p. 17-27, SEP 2010.
• Citações Web of Science: 9

Resumo

This study examines the development of the macroalgal community in a tropical stream on different artificial substrata (material and surface texture) and over varying periods of time. Our study indicated that the physical structure of the substratum did not affect species richness, but did alter the abundance of the macroalgal community. In addition, our results suggested that the amount of surface roughness could be an important factor driving the development of the macroalgal communities. The presence of a mucilaginous matrix with many diatoms and algal propagules on the surface of the substrata may have accelerated the colonization process. Macroalgal abundance peaked after 21 days of exposure. Generally, macroalgal species richness increased during the study period, however, a reduction in species richness was observed after 105 days of exposure, probably, as a result of competitive interactions. (AU)

• Processo FAPESP: 06/00890-2 - Avaliação da influência de diferentes tipos de substratos artificiais e tempo de exposição para o desenvolvimento de biomassa e estabilidade da composição florística da comunidade de macroalgas em um riacho da região centro-oeste do estado de São Paulo
• Beneficiário: Gustavo Juliano Arantes de Carvalho
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica