Biological features of an aestival pond in Western Canada

✍ Scribed by Graham R. Daborn

• Book ID: 104655810
• Publisher: Springer
• Year: 1974
• Tongue: English
• Weight: 578 KB
• Volume: 44
• Category: Article
• ISSN: 1573-5141
• DOI: 10.1007/bf00187278

✦ Synopsis

The seasonal changes in flora and fauna in an aestival pond in central Alberta, Canada, were studied through a complete annual cycle during which an exceptional decrease in water volume occurred in response to lower than normal rainfall . Substantial changes took place between successive summers in the species composition of the phytoplankton, Rotifera, Oligochaeta, Copepoda and Zygoptera . Some of the incoming species, particularly Chaetogaster diaphanus (Oligochaeta) and three species of Lestes (Zygoptera) are often associated with more temporary habitats of the region . The instability of species composition and productivity of the community is discussed in terms of the trophic position of aestival lakes and ponds .