Debate between bird and fish Debate between bird and fish The Debate between bird and fish is a literature essay of the Sumerian language, on clay tablets from the mid to late 3rd millennium BC. Seven ""debate"" topics are known from the Sumerian literature, falling in the category of 'disputations'; some examples are: The Debate between Winter and Summer; Debate between sheep and grain; the Tree and the Reed; bird and fish; and "The Dispute between Silver and Mighty Copper", etc. These topics came some centuries after writing was established in Sumerian Mesopotamia. The debates are philosophical and address humanity's place in the world. Some
Common species because common species shape ecosystems, contribute disproportionately to ecosystem functioning, and can show rapid population declines, conservation should look more closely at how the trade-off between species extinctions and the depletion of populations. Common species Common species and uncommon species are designations used in ecology to describe the population status of a species. Commonness is closely related to abundance. Abundance refers to the frequency with which a species is found in controlled samples; in contrast, species are defined as common or uncommon based on their overall presence in the environment. A species may be locally abundant without being common. However,