Potential effects of Asian clam (Corbicula fluminea) die-offs on native freshwater mussels (Unionidae) I: water-column ammonia levels and ammonia toxicity

Autor:	Donald S. Cherry, Jennifer L. Scheller, Naomi L. Cooper, Joseph R. Bidwell
Rok vydání:	2005
Předmět:	biology Water flow STREAMS Aquatic Science Unionidae biology.organism_classification Fishery Ammonia chemistry.chemical_compound Water column chemistry Habitat Environmental chemistry Ecosystem Corbicula fluminea Ecology Evolution Behavior and Systematics
Zdroj:	Journal of the North American Benthological Society. 24:369-380
ISSN:	1937-237X 0887-3593
Popis:	The Asian clam (Corbicula fluminea) co-occurs with unionid mussels in many riverine ecosystems. Clam populations can reach high densities and may undergo rapid die-offs, particularly during the low flow and warm temperatures of summer drought. Our study objective was to determine whether ammonia produced by decaying clam tissues during die-offs could affect unionid mussels. We induced C. fluminea die-offs in artificial streams to simulate die-off effects in natural habitats, and measured total and unionized ammonia (NH3-N) and dissolved oxygen (DO) in the overlying water. When water flow was stopped, reductions in DO preceded the onset of mortality in streams having the highest density of clams (∼10,000 clams/m2). NH3-N concentrations in the overlying water increased in association with clam mortality and reached concentrations of up to 5.04 mg/L at 26 ± 2°C. Temperature significantly influenced the rate of DO reduction and NH3-N production in the systems, while resumption of water flow led to rap...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a3ec9751aa4af264991b0a6f40b7e298 https://doi.org/10.1899/04-073.1 Zobrazit plný text záznamu