The Pace of Modern Life, Revisited<\/a>,\u201d co-authored by a research team at Brock University.<\/p>\nSuch adaptations can be measured as phenotypic rates of change and allow scientists to predict patterns of \u2018contemporary\u2019 evolutionary change.<\/p>\n
The research by the paper\u2019s co-senior author, Brock University Assistant Professor of Biological Sciences Kiyoko Gotanda, along with colleagues at 10 institutions around the world, shows evolution can be seen within a lifetime.<\/p>\n
\u201cIn some species, anywhere from two to 200 generations is enough to exhibit change,\u201d Gotanda said, pointing out that for fruit flies, 200 generations is approximately six years.<\/p>\n
\u201cWe have come a long way from the old view of evolution as a slow process to the point where we are now realizing that everything is evolving all around us all the time,\u201d said co-senior author Andrew Hendry, Professor of Biology at McGill University.<\/p>\n
Lead author Sarah Sanderson, a PhD candidate in Biology at McGill, says the big question now is \u201chow this rapid phenotypic change matters for populations, communities, ecosystems and nature’s contribution to people.\u201d<\/p>\n
Gotanda\u2019s team compiled many individual studies that have shown this type of evolution. They used the data to answer long-standing questions about how contemporary evolution works and provide a massive dataset of these changes so other investigators can answer related questions.<\/p>\n
The team is responsible for adding 5,676 new estimates of phenotypic change to the list, representing a 77 per cent increase.<\/p>\n
Key to their findings are how human disturbances such as trophy hunting influence change.<\/p>\n
\u201cWe focused on human disturbances and found a small absolute difference in rates of change exists between human disturbed and natural populations,\u201d Gotanda said.<\/p>\n
Analyses of the expanded dataset also confirms previous studies showing: harvesting by humans results in larger rates of change than non-human disturbances; introduced populations have increased rates of change; and body size does not increase through time.<\/p>\n
\u201cOverall, findings from earlier published analyses have largely held-up in analyses of our new dataset that encompass a much larger breadth of species, traits and human disturbances,\u201d Gotanda said.<\/p>\n
The team believes the database will serve as a stepping stone for further analyses to understand patterns of contemporary evolution. For example, postdoctoral researcher Lucas Gorn\u00e9 in Gotanda\u2019s research group and supported through a fellowship from the Faculty of Mathematics and Science is continuing to work with the database to answer more questions about rapid phenotypic change.<\/p>\n
\u201cI\u2019m most interested in in whether disturbances are generating confounding or synergistic effects,\u201d said Gotanda.<\/p>\n
The research is cautious to infer evolution from phenotypic rates of change as more research is needed to discover whether the traits exhibited are truly heritable (coming from parental genes) or plastic (generated by phenotypic changes in the environment within a lifespan).<\/p>\n
\u201cA common garden experiment involving the comparison of genetically distinct strains, families or populations under identical environmental conditions would help to uncover the extent that the rates of change we observe can be attributed to contemporary evolution,\u201d Gotanda said.<\/p>\n
Brock Faculty of Mathematics and Science Dean Ejaz Ahmed said he is looking forward to the discoveries Gotanda\u2019s research supports.<\/p>\n
\u201cThey are now the caretakers of an invaluable list, allowing exploration and expansion for future scientists to build upon,\u201d he said.<\/p>\n","protected":false},"excerpt":{"rendered":"
In response to targeting by trophy hunters, wild populations of bighorn sheep are now growing 10 per cent smaller horns than they did less than 20 years ago as a way to adapt and minimize the risk to their species. That rapid evolutionary interplay between hunter and hunted is an example described in a recently accepted paper in the Journal of Molecular Ecology entitled \u201cThe Pace of Modern Life, Revisited,\u201d co-authored by a research team at Brock University.<\/p>\n","protected":false},"author":57,"featured_media":75680,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[7484,7,41,1,4,5],"tags":[11035,11034,348,10769,11036],"_links":{"self":[{"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/posts\/75681"}],"collection":[{"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/users\/57"}],"replies":[{"embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/comments?post=75681"}],"version-history":[{"count":4,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/posts\/75681\/revisions"}],"predecessor-version":[{"id":75685,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/posts\/75681\/revisions\/75685"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/media\/75680"}],"wp:attachment":[{"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/media?parent=75681"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/categories?post=75681"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/tags?post=75681"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}