Macroalgae survey compared to water quality in Santos Bay - São Paulo Danielle Garcia Araujo, Ana Luiza Gonçalves Ayres, Fabio Giordano, André Luis Faccini

Abstract

Macroalgae are easily found throughout the marine environment, but with increasing human population and pollution, there is an influence on the biodiversity already seen in previously published works, the increase of ship traffic in the port region is another factor to be considered bringing alien organisms that can adapt to the region. There are no systematic data on water monitoring in the region related to algal species in Santos Bay, such as pH, temperature, dissolved oxygen, dissolved materials such as nitrite, nitrate and phosphate, ammonia and silicate, and the algae found. With the material collected there was a comparison in diversity and which genres were found. Along the Bay of Santos, four points were selected from the twenty already collected by Joly (1957), the first to carry out this type of research, two points at the tip of the beach (Santos) and two points at Porchat Island (São Vicente). Another former work on the area is Oliveira and Berchez (1978) in which the comparison showed at that time great decrease in numbers of genera with an interval of twenty one years, and new genres were found. In this work eleven genera were found, and none of the analyzed parameters were found outside the maximum allowed value.