Advertisement

Topics

Development and application of a multispecies toxicity test with tropical freshwater microalgae.

08:00 EDT 21st March 2019 | BioPortfolio

Summary of "Development and application of a multispecies toxicity test with tropical freshwater microalgae."

Microalgae are commonly used in ecotoxicity testing due to their ease of culturing and rapid cell division rates. These tests generally utilise a single species of algae; however, microalgae occur in the environment as complex communities of multiple species. To date, routine multispecies toxicity tests using tropical microalgae have not been available. This study investigated four tropical freshwater microalgal species for use in a chronic multispecies toxicity test based on the population growth (cell division) rate: Pediastrum duplex, Monoraphidium arcuatum, Nannochloropsis-like sp. and Chlorella sp. 12. Flow cytometric analysis identified the different fluorescence and light scattering properties of each algal species and quantified each species within multispecies mixtures. Following optimisation of test media nutrients and pH, a toxicity testing protocol was developed with P. duplex, M. arcuatum and Nannochloropsis-like sp. There were no significant differences in growth rates of each alga when tested over 72 h as single species or in multispecies mixtures. Atrazine and imazapic, two herbicides with different modes of action, were used to assess the sensitivity of the multispecies toxicity test. Atrazine was toxic to all species with 72-h IC10 values of 7.2, 63 and 280 μg/L for P. duplex, M. arcuatum and Nannochloropsis-like sp. respectively, while imazapic was not toxic to any species at concentrations up to 1100 μg/L. The toxicity of atrazine and imazapic to each microalgal species in the multispecies toxicity test was the same as that determined from single-species toxicity tests indicating that the presence of these microalgae in a mixture did not affect the toxicity of these two herbicides. This study is the first to develop a multispecies tropical microalgal toxicity test for application in freshwaters. This time- and cost-effective tool can be utilised to generate data to assist environmental decision making and to undertake risk assessments of contaminants in tropical freshwater environments.

Affiliation

Journal Details

This article was published in the following journal.

Name: Environmental pollution (Barking, Essex : 1987)
ISSN: 1873-6424
Pages: 97-106

Links

DeepDyve research library

PubMed Articles [23008 Associated PubMed Articles listed on BioPortfolio]

Freshwater chronic ammonia toxicity: a tropical-to-temperate comparison.

The chronic toxicity of ammonia to tropical freshwater species is under-represented, leading to the use of temperate species to derive water quality guideline values (GV) for tropical regions. Such pr...

Effect of algal surface area and species interactions in toxicity testing bioassays.

Single and multispecies algal bioassays were assessed using copper toxicity with three green algae (Scenedesmus subspicatus, Scenedesmus quadricauda and Ankistrodesmus angustus) and one blue-green alg...

The effect of various natural dissolved organic carbon on copper lability and toxicity to the tropical freshwater microalga, Chlorella sp.

This study adds further critical information to the limited body of knowledge on the ameliorative ability of Australian DOC, reinforcing the importance of DOC source and concentration as significant f...

Ecotoxicological assessment of synthetic and biogenic surfactants using freshwater cladoceran species.

Surfactants have been continuously detected within aquatic environments as a consequence of their use on a global scale. Lipopeptides are biosurfactants naturally produced by Bacillus subtilis that ha...

FISH EMBRYO TESTS AND ACUTE FISH TOXICITY TESTS ARE INTERCHANGEABLE IN THE APPLICATION OF THE THRESHOLD APPROACH.

A database was compiled for algal (OECD 201 Test Guideline [TG]), Daphnia magna (OECD 202 TG), acute fish toxicity (AFT, OECD 203 TG), and fish embryo toxicity (FET, OECD 236 TG) to assess the suitabi...

Clinical Trials [9024 Associated Clinical Trials listed on BioPortfolio]

The Effect of a Multispecies Probiotic on Hypersensitivity in Irritable Bowel Syndrome (IBS) Patients

The purpose of this study is to determine whether a specifically designed multispecies probiotic decreases visceral hypersensitivity in IBS-patient (defined by an increased pain tolerance ...

Schistosomiasis in Senegal

Schistosomiasis is a flatworm transmitted from freshwater snails to humans in the tropics. In addition to this infectious disease, tropical developing countries are faced with malnutrition...

The Effect of a Multispecies Probiotic on Reducing the Incidence of Antibiotic-associated Diarrhoea in Children.

In this trial, the investigators aim to assess the effectiveness of a multispecies probiotic consisting of 2 strains of Bifidobacterium (B. bifidum W23, B. lactis W51) and 6 strains of Lac...

Testing and Development of a Sleep Training Mobile Health Application

The specific aims of this study are : 1) To pilot test the alpha build prototype of the sleep training smartphone application using a sample of parents looking for sleep training advice on...

An Oral Dose-Ranging Finding Study in Patients With HIV Disease, CDC Classification Groups IIB, III, and IV-C2

To establish the relationship between the oral dose of zidovudine (AZT) and its hematologic toxicity. AZT has preliminarily been shown to decrease significant events and death in a group o...

Medical and Biotech [MESH] Definitions

Tests designed to assess language behavior and abilities. They include tests of vocabulary, comprehension, grammar and functional use of language, e.g., Development Sentence Scoring, Receptive-Expressive Emergent Language Scale, Parsons Language Sample, Utah Test of Language Development, Michigan Language Inventory and Verbal Language Development Scale, Illinois Test of Psycholinguistic Abilities, Northwestern Syntax Screening Test, Peabody Picture Vocabulary Test, Ammons Full-Range Picture Vocabulary Test, and Assessment of Children's Language Comprehension.

A genus of freshwater mussel in the family MYTILIDAE, class BIVALVIA. It is found in tropical and warm temperate coastal waters. Most species have green in their shells.

An application that must be submitted to a regulatory agency (the FDA in the United States) before a drug can be studied in humans. This application includes results of previous experiments; how, where, and by whom the new studies will be conducted; the chemical structure of the compound; how it is thought to work in the body; any toxic effects found in animal studies; and how the compound is manufactured. (From the "New Medicines in Development" Series produced by the Pharmaceutical Manufacturers Association and published irregularly.)

The study of life and ECOLOGIC SYSTEMS in bodies of FRESHWATER.

Epicutaneous or intradermal application of a sensitizer for demonstration of either delayed or immediate hypersensitivity. Used in diagnosis of hypersensitivity or as a test for cellular immunity.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topic

Tropical Medicine
Tropical Medicine is the study of diseases more commonly found in tropical regions than elsewhere. Examples of these diseases are malaria, yellow fever, Chagas disease, Dengue, Helminths, African trypanosomiasis, Leishmaniasis, Leprosy, Lymphatic filaria...


Searches Linking to this Article