Study the indicator taxa of benthonic algae communities: An Assessment proposal and their use in the Magdalena river, Mexico City
Por:
Carmona Jimenez, Javier, Ramirez Rodriguez, Rocio, Guadalupe Bojorge-Garcia, Miriam, Gonzalez Hidalgo, Beatriz, Cantoral-Uriza, Enrique A.
Publicada:
1 may 2016
Resumen:
The application and development of environmental laws governing
watershed management requires identification of biological indicators,
parameters and measures to establish its ecological status, for which
the present study aims to characterize the ecological indicator value of
stream benthic algae in an urban area of Mexico City. Six sites of the
Magdalena river were studied in the most contrasting seasons: dry-warm,
rainy and dry-cold. At each site the physicochemical parameters of water
were recorded and 10 samples were collected: Five with visible algal
growths and five with diatoms. The environmental quality of each site
was determined by the trophic status and its confirmation with the
richness and benthic algal diversity, through a canonical correspondence
analysis and the calculation of the indicator value of species (IndVal).
According to the trophic status, three groups of sites were recognized.
The first group (G1) was assessed as reference of the oligotrophic
conditions and presented 11 species with the highest IndVal, protruding:
Encyonema silesiacum, Gomphonema parvulum, Navicula cryptocephala,
Planothidium lanceolatum, Vaucheria bursata, Placoma regulare and Nostoc
parmelioides. A second group (G2) was associated with 15 species
considered detectors, which were tolerant to increased nutrients in at
least one season, such as Diatoma mesodon and Prasiola mexicana. The
third group (G3) included sites with species that had a wide range of
tolerance to pollution: Fistulifera saprophila, Nitzschia minuta,
Nitzschia palea, Nitzschia recta and Phormidium autumnale. The species
IndVal of Magdalena River has established reference sites of good
environmental quality and those that are altered by human activities,
therefore they are recommended as the first step in a methodological
proposal for a long-term biomonitoring through a biological index.
Filiaciones:
Carmona Jimenez, Javier:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Ecol & Recursos Nat, Lab Ecosistemas Ribera, Campus Ciudad Mexico,Circuito Exterior S-N, Mexico City 04510, DF, Mexico
Ramirez Rodriguez, Rocio:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Ecol & Recursos Nat, Lab Ecosistemas Ribera, Campus Ciudad Mexico,Circuito Exterior S-N, Mexico City 04510, DF, Mexico
Guadalupe Bojorge-Garcia, Miriam:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Lab Ecol Acuat & Algas, Campus Juriquilla,Bulevar Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
Gonzalez Hidalgo, Beatriz:
Univ Autonoma Metropolitana, Div Ciencias Biol & Salud, Dept Prod Agr & Anim, Herbario Univ Autonoma Metropolitana, Campus Xochimilco Calzada Hueso 110, Mexico City 04960, DF, Mexico
Cantoral-Uriza, Enrique A.:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Lab Ecol Acuat & Algas, Campus Juriquilla,Bulevar Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
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