The effect of aluminum in soft water at low pH on osmoregulation and ionic balance in the dragonfly Libellula julia uhler |
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| Institution: | 1. NatureServe, 2550 South Clark Street, Suite 930, Arlington, VA 22202, USA;2. Vermont Department of Fish & Wildlife, 5 Perry Street, Suite 40, Barre, VT 05641, USA;3. New Hampshire Audubon, 84 Silk Farm Road, Concord, NH 03301, USA;4. New York Natural Heritage Program, 625 Broadway, Albany, NY 12233, USA;1. Shoals Marine Laboratory, School of Marine Sciences and Ocean Engineering, University of New Hampshire, Durham, NH 03824, USA;2. Biodiversity Research Institute, 276 Canco Road, Portland, ME 04103, USA;3. IPEN, Första Långgatan 18, 413 28 Göteborg, Sweden;4. Arnika Association, Chlumova 17, Prague 3 130 00, Czech Republic;5. The Intelligence Group LLC, 443 North Franklin St., Suite 220, Syracuse, NY 13204, USA;6. Eco-Accord Center for Environment and Sustainable Development, P.O. Box 43, Moscow 129090, Kuusinena Str. 21 B, Russia |
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| Abstract: | - 1.1. To determine the physiological impact of Al on an organism stressed by low pH, the acid tolerant Libellula Julia was exposed to 30 mg/l Al at a pH of 2.3, 0.3 of a pH unit above its 96 hr lc50.
- 2.2. Aluminum at low pH, in comparison to low pH alone, caused highly significant losses of wet and ash weight and of body burdens of Na+ and Ca2+.
- 3.3. Since at the test pH Al exists as the ion, it would seem that a biological impact can be exerted not only by the ionized and unionized hydroxides, but also by Al3+.
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