How much do trees vary in the way they suck carbon dioxide from the air and use it to make roots, trunks, branches and leaves? The answer to that question is an important one because it has a huge impact on our ability to predict how destroying or creating forests influences climate change. And the correct answer is a surprising one, according to two related studies published in the Proceedings of the National Academy of Sciences this week by University of Minnesota forest ecologist Peter Reich and colleagues in Minnesota, Arizona, Australia, China, Poland and Germany.
Conventional models used to assess the impact of forests on greenhouse gas concentrations in the atmosphere assume that the way trees use carbon to build roots, leaves and trunks is fairly constant across a range of conditions — that is, that trees everywhere devote the same fraction of new growth to each component and that components have the same durability everywhere. However, analyzing massive amounts of data gathered from around the globe, Reich and colleagues documented predictable differences in key properties of forests across north-south climate gradients. Continue reading
YouTube is usually a one-stop shop for movie trailers, music and cat videos. But one family is using the popular website to educate viewers on earth and climate science, one video at a time.
Last March, brothers Henry and Alex Reich, along with their father, IonE resident fellow Peter Reich, created the YouTube channel MinuteEarth, featuring one- to three-minute animated videos focusing on topics ranging from fisheries management to atmospheric science. The three shared their experience at the Institute on the Environment’s first Frontiers in the Environment presentation of the semester – “Science Communication: Teach, Entertain or Inspire?” – Wednesday, Jan. 29 at the University of Minnesota in St. Paul.
Climate change and overconsumption of Earth’s resources have a huge impact on humans, but understanding how these issues affect wildlife populations and behavior is important as well.
That was the topic of the Institute on the Environment’s final Frontiers in the Environment talk of the semester Dec. 11 when James Forester, IonE resident fellow and assistant professor of fisheries, wildlife and conservation biology, discussed “Tracking Animals through Space and Time: Understanding the Consequences of a Changing World on Wildlife Populations.”