TITLE:
Knowledge to Ecological Preferences in a Tropical Epiphytic Algae to Use with Eutrophication Indicators
AUTHORS:
Yimmy Montoya-Moreno, Néstor Aguirre-Ramírez
KEYWORDS:
Algae; Epiphyton; Bioindicator; Tropical Environment
JOURNAL NAME:
Journal of Environmental Protection,
Vol.4 No.11A,
November
20,
2013
ABSTRACT: In Ayapel floodplain periphyton
associated to macrophyte roots on the basis of material was collected in fourteen
sampling sites in nine moments of compilation. From the analysis of the samples
were recorded 550 algal species, of which 56% were diatoms. Furthermore it was
valued relative abundances of taxa and the average physicochemical variables to
identify the optimal values and tolerance ranges of species. In the case of
nitrates optimal value was below 2 mg/L for all algae except for Actinella sp. and Euastrum sinuosum which optimal values were close to
zero with low variability. Regarding all species the algal nitrite
concentration showed optimum values below 2 mg/L except Encyonema minutum and E.
sinuosum whose optimum were 0.4 and 0.5 mg/L respectively. About nitrogen
as ammonia was repeated the above situation, i.e. optimum
values below 2 mg/L except for E. minutum and E. sinuosum. Respect to phosphorus the species
with optimum greater than 0.6 mg/L are the diatoms, in contrast, the lowest
values were optimal for E. sinuosum and Actinella sp. From the viewpoint
of bioindication high abundance of Synedra
goulardii indicates high transparency, Ulnaria
ulna and Planothidium lanceolatum indicate lower concentration of dissolved
oxygen and water temperature between 29°C - 30°C, Actinella aff. robusta, E. minutum, Cylindrospermopsis raciborski, Lyngbya cf. limnetica, Eunotia naegueli, Navicula cryptocephala, Diadesmis confervaceae, Frustulia
rhomboides and Aulacoseira granulata.(For more information,please refer to the PDF.)