Benthic microalgae community response to flooding in a tropical salt flat.
This research evaluated the effect of flooding on the microphytobenthos community structure in a microbial mat from a tropical salt flat. Field samples were collected during four consecutive days: on the first three days the salt flat was dry, on the fourth day it was flooded by rain. In order to evaluate the community maintained in flood conditions, samples from this area were collected and kept in the laboratory for 10 days with sea water. The results of total abundance of microphytobenthos varied from 4.2 × 108 to 2.9 × 109 organisms L-1, total density increased one order of magnitude under the effect of water for both situations of precipitation in the salt flat and in experimental conditions, an increase due to the high abundance of Microcoleus spp. Shannon index (H') was higher during the desiccation period. Our data suggest that changes in the abundance of organisms were due to the effect of water. The dominance of the most abundant taxa remained the same under conditions of desiccation and influence of water, and there is probably a consortium of microorganisms in the microbial mat that helps to maintain these dominances.
Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Universidade Federal do Rio de Janeiro, Rio de Janeiro RJ , Brazil, Programa de Pós-graduação em Ciências Biológicas (Microbiologia), Departamento Microbiologia Ambiental, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro - UFRJ, Av. Carlos Chagas Filho, 373, Bloco I, Ilha do Fundão, CEP 21941-590, Rio de Janeiro, RJ, Brazil.|Instituto de Biologia, Universidade Federal do Rio de Janeiro, Universidade Federal do Rio de Janeiro, Rio de Janeiro RJ , Brazil, Laboratório de Biogeoquímica, Instituto de Biologia, Universidade Federal do Rio de Janeiro - UFRJ, Av. Carlos Chagas Filho, 373, Bloco A, Ilha do Fundão, CEP 21941-971, Rio de Janeiro, RJ, Brazil.
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Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Universidade Federal do Rio de Janeiro, Rio de Janeiro RJ , Brazil, Programa de Pós-graduação em Ciências Biológicas (Microbiologia), Departamento Microbiologia Ambiental, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro - UFRJ, Av. Carlos Chagas Filho, 373, Bloco I, Ilha do Fundão, CEP 21941-590, Rio de Janeiro, RJ, Brazil.|Instituto de Biologia, Universidade Federal do Rio de Janeiro, Universidade Federal do Rio de Janeiro, Rio de Janeiro RJ , Brazil, Laboratório de Biogeoquímica, Instituto de Biologia, Universidade Federal do Rio de Janeiro - UFRJ, Av. Carlos Chagas Filho, 373, Bloco A, Ilha do Fundão, CEP 21941-971, Rio de Janeiro, RJ, Brazil.|Department of Environmental Change, Linköping University, Linköpings Universitet, Linköping , Sweden, Department of Environmental Change, Linköping University, 581 83, Linköping, Sweden.
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Enrich-Prast
D000222:Adaptation, Physiological / Q000502:physiology*; D000458:Cyanobacteria; D004784:Environmental Monitoring / Q000379:methods*; D055868:Floods; D019015:Geologic Sediments; D058086:Microalgae / Q000502:physiology*; D011891:Rain; D012623:Seawater; D012965:Sodium Chloride; D014329:Tropical Climate; D014867:Water
D014867:Water; D012965:Sodium Chloride