Abstract

In the range of nitrite concentrations episodically generated in N-enriched running waters, nitrite has a detrimental effect on the freshwater sponges Ephydatia muelleri and Spongilla lacustris in the laboratory. At pH 7 and nitrite concentrations of 0.75 mg/l NO2-N and higher, the hatching rate of gemmules of Ephydatia muelleri decreases. At pH 6, 1.5 mg/l NO2-N causes malformations in tissue and spicules of Spongilla lacustris. At pH 5 and 1.5 mg/l NO2-N, hatching of both Ephydatia muelleri and Spongilla lacustris stops

Keywords

Spongilla lacustris ; Life cycle ; Morphogenesis ; Hatching ; Gemmule ; Environmental factor ; Nitrites ; Toxicity ; Porifera ; Invertebrata ; Freshwater environment

Published in

Archiv fur Hydrobiologie
1997, Volume: 139, number: 1, pages: 69-81

SLU Authors

• Kahlert, Maria

  • Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Environmental Sciences related to Agriculture and Land-use
Fish and Aquacultural Science


Permanent link to this page (URI)

https://res.slu.se/id/publ/23286