English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Genomic data are rapidly resolving the tree of living species calibrated totime, the timetree of life, which will provide a framework for research indiverse fields of science. Previous analyses of taxonomically restrictedtimetrees have found a decline in the rate of diversification in many groups oforganisms, often attributed to ecological interactions among species. Here wehave synthesized a global timetree of life from 2,274 studies representing50,632 species and examined the pattern and rate of diversification as well asthe timing of speciation. We found that species diversity has been mostlyexpanding overall and in many smaller groups of species, and that the rate ofdiversification in eukaryotes has been mostly constant. We also identified, andavoided, potential biases that may have influenced previous analyses ofdiversification including low levels of taxon sampling, small clade size, andthe inclusion of stem branches in clade analyses. We found consistency intime-to-speciation among plants and animals, approximately two million years,as measured by intervals of crown and stem species times. Together, thisclock-like change at different levels suggests that speciation anddiversification are processes dominated by random events and that adaptivechange is largely a separate process.

Tree of life reveals clock-like speciation and diversification