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Property Organism Value Units ID Details
Time it would take the ~5,400 current mammal species to evolve enough new history to restore net phylogenetic diversity (PD) to preanthropogenic levels Biosphere ~500,000 years 117257 Davis M, Faurby S, Svenning...
Fraction of the 1.9 million known recent species that are recorded as extinct Biosphere 0.04 ((799 species)) % 117269 Régnier C et al., Mass...
Number of predicted protein-coding genes Physcomitrella patens 27949 genes 111377 Lang D, Zimmer AD, Rensing SA...
Fraction of species in breeding avifauna which comprises seabirds Birds in Britain 16 %: globaly ~4 % 116945 Kevin J. Gaston & Tim...
Number of migratory birds lost to hunting and trapping in the Mediterranean countries each year Biosphere 1e+9 birds/year 116946 Kevin J. Gaston & Tim...
Km and kcat values of psychrophilic (P) and mesophilic (M) enzymes Various Table - link N/A 114094 Tony Collins & Charles Gerday...
Estimates for the number of individual birds in Africa and the Nearctic with mean density Birds Table - link N/A 116950 Kevin J. Gaston & Tim...
Fraction of biomass in the pelagic zone that is animals Biosphere ≤80 % 113585 Olivia P. Judson, The...
Activation parameters for activity of psychrophilic enzymes (P) as compared to those of their mesophilic counterparts (M) Various Table - link N/A 114095 Tony Collins & Charles Gerday...
Number of individual seabirds breeding in Britain Birds 6.67e+6 individual birds 116944 Kevin J. Gaston & Tim...
Estimates for the number of individual birds in different countries with mean density Birds Table - link N/A 116943 Kevin J. Gaston & Tim...
Number of birds lost to predation by domestic cats in the USA each year according to different sources Biosphere Winkler et al., 80 million birds/year: Walsberg 319 - 638 birds/year 116947 Kevin J. Gaston & Tim...
Fraction of the four billion species estimated to have evolved on the Earth over the last 3.5 billion years that are extinct Biosphere ~99 % 112752 Barnosky AD et al., Has...
Oxygen concentration below which 50% of coastal marine animal species die Various ~70 μmol/kg 108704 Seibel BA. Critical oxygen...
Estimates of the local density of individual birds (number/km^2) of all species at seven forest sites on five continents Birds Table - link individuals/km^2 116942 Kevin J. Gaston & Tim...
Time scale for appearance of photosynthetic O2 producing cyanobacteria Biosphere 3200 MYA 103790 David L. Nelson, Michael...
Fraction of known animal species that are beetles Biosphere nearly 25 % of all described species 113119 Hunt T et al., A com...
Fraction of earth's surface covered by cold ecosystems (Arctic & Antarctica, non-polar cryosphere, and deep oceans) Biosphere 70 % 114093 Marcelo Baeza, Jennifer...
Size of genome Tree Norway Spruce Picea abies 19.6 (Table - link) Giga base pairs 113647 Nystedt B et al., The...
Number of bird specimens on Earth Biosphere 200 - 400 billion (10^9) birds 116940 Kevin J. Gaston & Tim...