by Elio
Nameless orphaned bacteria from a lake sediment. Courtesy of D. E. Caldwell. Previously published on the covers of the 2003 issues of International Microbiology.
"Encyclopedia of Life To Catalogue Species" is the headline in the Washington Post that announces a multi-institutional grant of $12.5 million to list and describe 1.8 million species that have a name (about $7 a species). The estimate is that only 10% of all species fall in this category. From what we're learning about bacteria and archaea, the proportion for "our" organisms is almost certainly much lower. Microbes should get a quantity discount.
Certainly it will cost a lot of dollars before we come to terms with the problem of how to assimilate all the genomic information that is accumulating into a rational classification of all the bacteria and archaea and still have a straightforward way of being able to talk and write about particular forms. Up to now a basis on "types" recognized as species have worked. However the boundaries of species as defined up to now get fuzzier and fuzzier, which seems quite reasonable in a mutagenic world with freedom to exchange nucleotide assemblies. So the molecularly inclined are not happy with species as they see them and have expressed this in a recent Colloquium of the American Academy of Microbiology. Interestingly the contributors come to no conclusion of what must be done except to encourage finding a way and seem to state that there will have to b e some choice of genomic sequences as points of reference for whatever is identified as a recognizable form. Sounds like "types" again and like "species". Plus ça change.....!
Posted by: Bob Murray | May 11, 2007 at 06:28 PM