Deep underwater seismic explosion experiments and their possible ecological impact - The case of Lake Arenguade-Central Ethiopian highlands

作者：Girma Misgina Belachew; Kifle Demeke; Jebessa Habte^*

来源：Limnologica, 2012, 42(3): 212-219.

DOI：10.1016/j.limno.2011.12.002

• Arenguade
• Bishoftu
• Seismic explosion
• Arthrospira
• Anabaenopsis
• Ethiopia

The study was conducted in Lake Arenguade (Lake Haro Hadho) from 2008 to 2009 and results were compared with previous studies conducted by different authors since the 1960s. The study included the chemistry and chlorophyll-a biomass in micrograms per liter (mu g L-1). Results showed that chlorophylla biomass dramatically decreased since the 1960s. Previous studies indicated that the phytoplankton community of Lake Arenguade was dominated by a single cyanobacterium species, Arthrospira fusiforrnis (Voronichin) Komarek et Lund (syn. Spirulina fusiformis Voronichin) while the present study showed co-dominance of the lake%26apos;s phytoplankton by another cyanobacterium species, Anabaenopsis elenkinii Miller. The trend shows that A. fusiformis is on the verge of disappearance from Lake Arenguade. While other factors can be responsible for such a change, the contribution of underwater seismological detonation experiments carried out repeatedly cannot be ruled out. Based on the results, recommendations were forwarded for possible full-fledged environmental impact assessment of explosion experiments in Lake Arenguade; and other lakes in which similar explosion experiments were carried out.

• 出版日期2012-9