Application-rate-dependent impacts of a fire retardant on zooplankton community structure of temporary ponds
David G. Angeler A B , Silvia Martín A , Marta Rodríguez A and José M. Moreno AA University of Castilla – La Mancha, Institute of Environmental Sciences, Avenida Carlos III s/n, E-45071 Toledo, Spain.
B Corresponding author. Email: david.angeler@uclm.es
Marine and Freshwater Research 56(2) 197-202 https://doi.org/10.1071/MF04271
Submitted: 10 November 2004 Accepted: 20 January 2005 Published: 12 April 2005
Abstract
In the present study, we employed dry sediments in a temporary-pond microcosm experiment to evaluate the response of the zooplankton community after exposure to different application rates of the commercially available fire retardant, Fire-Trol 934. Application rates were selected to reflect ranges used during fire control/prevention operations in grasslands and shrublands in Mediterranean areas. Results show loss of water quality in terms of increased nutrient (total phosphorus and total nitrogen) concentrations, electrical conductivity and water colour. The magnitude of water-quality impact depended on FRC application rate and was most severe in the highest application rate treatment. The zooplankton community was significantly affected by the FRC treatments. In the control, a diverse assemblage of cladocerans, rotifers and ostracods developed, whereas the zooplankton community in all FRC treatments was depauperate, consisting only of a few species of rotifers. The lack of cladocerans, which are effective grazers of phytoplankton, could negatively affect ecosystem functioning and foster eutrophication effects through excessive algal growth, at least during the first weeks after temporary ponds fill with winter rains.
Extra keywords: impact assessment, temporary wetlands.
Acknowledgments
We are most grateful to the Tablas de Daimiel National Park staff, especially M. Carrasco and C. Ruiz, for providing sediments for this study. Financial support was provided through the European Community project ‘ERAS’(EVG1–2002–00019). Two anonymous referees provided constructive criticism that improved the paper.
Angeler, D. G. , Chow-Fraser, P. , Hanson, M. A. , Sánchez-Carrillo, S. , and Zimmer, K. D. (2003). Biomanipulation: a useful tool for freshwater wetland mitigation? Freshwater Biology 48, 2203–2213.
| Crossref | GoogleScholarGoogle Scholar |
Barry, M. J. , and Davies, W. (2004). Effects of invertebrate predators and a pesticide on temporary pond microcosms used for aquatic toxicity testing. Environmental Pollution 131, 25–34.
| Crossref | GoogleScholarGoogle Scholar | PubMed |
Cairns, J., (1986). The myth of the most sensitive species. Bioscience 36, 670–672.
Johnston, C. A. (1991). Sediment and nutrient retention by freshwater wetlands: effects on surface water quality. Critical Reviews in Environmental Control 21, 491–565.
Neill, W. E. (1975). Experimental studies on microcrustacean competition, community composition and efficiency of resource utilization. Ecology 56, 809–826.
Tan, L.-W. , and Shiel, R. J. (1993). Response of rotifer communities to inundation. Hydrobiologia 225, 361–369.
| Crossref | GoogleScholarGoogle Scholar |
Van Donk, E. , Prins, H. , Voogd, H. M. , Crums, S. J. H. , and Brock, T. C. M. (1995). Effects of nutrient loading and insecticide application on the ecology of Elodea-dominated freshwater microcosms. 1. Response of plankton and zooplanktivorous insects. Archiv für Hydrobiologie 133, 417–439.
Zedler, P. H. (2003). Vernal pools and the concept of “isolated wetlands”. Wetlands 23, 597–607.