Four populations of each species were studied, representing a large proportion of extant populations.
The vertical red lines show the best estimate for the proportion of extant species considered threatened (CR, EN and VU) if Data Deficient species are Threatened in the same proportion as data-sufficient species.
However, this does not necessarily address the major research question of the current study, which is to identify the minimal possible number of founders of mtDNA lineages within the approximately 2,000 year historical time frame relevant to the historical context of the Jewish Diaspora that would explain a large proportion of extant mtDNA variation in that population.
A relatively large proportion of extant biodiversity diverged recently (less than 5 million years old), and these relatively young species may be particularly susceptible to hybridization due to the absence of postzygotic isolation [ 8].
The relative cladogenesis (RC) statistic, which uses a broken-stick distribution to identify branches in the tree ancestral to a greater proportion of extant descendant lineages than expected by chance [ 1, 58], was used to calculate the probability that a particular lineage at time t will have k descendants given the total number of descendants at time 0 (the present).
Based on previously reported qPCR determinations of 16S rRNA gene copy numbers for archaea from the same sample set (Soule et al.2009), AOA can account but for a small proportion of the extant total population of BSC archaea.
Thus many of these results are based on a large proportion of the extant relevant scientific literature.
These results show that a large proportion of the extant diversity of the kinesin superfamily was already established before the radiation of eukaryotes from the LCEA.
Paleobotanists have since continued to make extensive use of Bailey and Sinnott's "index," eventually developing a quantitative method known as leaf-margin analysis, based on linear regressions of extant proportions of untoothed species (NT) and mean annual temperature (MAT) [5] [9].
Our results agree with previous findings showing that baboons display PDPs more similar in overall proportions to those of extant humans rather than those of extant great apes, although being shorter and displaying a larger base (Figure 3).
Shifts in climate tolerance appear to have been more important in this flora than is currently appreciated, and lineages that underwent such shifts went on to contribute a high proportion of the flora's extant species diversity.
