Nkebi ahịrịokwu 1: Na mpaghara ahụ enwere ala aja aja mesotrophic na eutrophic, ala aja aja calcareous, mkpọda dị elu, okwute dị n'akụkụ ala a na-emepebeghị emepe, na agba aja aja. Nkebi ahịrịokwu nke abụọ: Na mpaghara ahụ, e nwere ụrọ na-acha aja aja na-acha aja aja na-acha aja aja, ala na-acha aja aja, mkpọda dị larịị, ugwu ndị dị n'akụkụ ala ndị a na-emepebeghị emepe na ebe ndị a na-akpọ mesotrophic. Ajụjụ: Ọ̀ bụ otu ihe ka ahịrịokwu nke mbụ na nke abụọ pụtara? Ee ma ọ bụ Ee e?
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