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Property Organism Value Units ID Details
Global respiration of flora and fauna Biosphere 4.0 x 10^15 - 4.3 x 10^15 mol O2/year 116115 Duursma EK, Boisson MPRM...
Fraction of world vascular plant flora that Mediterranean-type climate (MTC) regions (covering only about 2.2% of world land area) are home to Biosphere 16.7 % of world vascular plant flora 117260 Rundel PW et al., Fire...
Increase in calorie intake required to maintain body weight in germ-free rats Rat Rattus norvegicus 30 % 102389 Hooper LV, Gordon JI....
Number of bacterial species in gut Human Homo sapiens total >1,000: in gut of any individual ~160 species 113400 Rowland I et al., Gut...
Number of bacterial species-level and genus-level operational taxonomic units (OTUs) in human and worm & phylotype number in termite Metazoa animals species-level OTUs in human ~1,000: genus-level OTUs in worm 832: phylotypes in termite hindgut 216 OTUs/phylotypes per individual 113942 Shapira M. Gut Microbiotas...
Quantity of spores produced in ΔSterne strain after incubation with phages Bacteria Bacillus anthracis ~5×10^8 spores/ml 117015 Fortier LC, Sekulovic...
Percent of indigenous gastrointestinal tract microflora that are obligate anaerobes Human Homo sapiens 99.9 % 105706 Berg RD. The indigenous...
Predominant bacterial species isolated from feces Human Homo sapiens Table - link % 112897 Adrian Lee, 1985, Neglected...
Rate of turnover of e. coli strains in intestine Human Homo sapiens 2-4 weeks 102540 Hartl DL, Dykhuizen DE....
Number of species of bacteria in mammalian large intestine bacteria 400-500 unitless 105655 Peekhaus N, Conway T....
Fraction of 16S rDNAs molecular species that correspond to known organisms in fecal sample Human Homo sapiens 24 % 110959 Suau A et al., Direct...
Moisture content in feces Human Homo sapiens 26 % 110960 Suau A et al., Direct...
Frequency of lysogenization of host cells during infection by temperate phages Bacteriophage 10^-7 - 10^-2 unitless 112567 Letarov A, Kulikov E....
Rate of spontaneous phage production Bacteriophage (host vaginal Lactobacillus) <10^-8 pfu/cell 112568 Letarov A, Kulikov E....
Usual concentration of bacteria in stomach Human Homo sapiens <1,000 cfu/ml 110219 Simon GL, Gorbach SL....
Ratio between number of genes in microbiome and in human Human Homo sapiens 50-100 unitless 102388 Sears CL. A dynamic ...
Number of species in microbiome Human Homo sapiens 500-1000 unitless 102387 Sears CL. A dynamic ...
Overall frequency of plant species that hybridize Plants 0.09 hybrid combinations per nonhybrid species 113466 Yakimowski SB, Rieseberg...
Ratio of anaerobic/aerobic bacteria in faeces Human Homo sapiens 1000 anaerobes/aerobes 112842 A. Lidbeck and C. E. Nord...
Fraction of plant species that hybridize Plants according to floristic surveys ~10: in a township in Massachusets ~3: in the British Isles ~25 % 113465 Yakimowski SB, Rieseberg...