CARTA: Humans: The Planet-Altering Apes with David Holway Oliver Ryder and Patricia Hunt
Evolution (Audio)
by UCTV: UC San Diego
2M ago
As humans have evolved, so has our ability to drastically alter the planet we call home. In this collection of talks from the CARTA symposium, "Humans: The Planet-Altering Apes" you will learn about specific examples on how humans have changed Earth and what can be done to prevent its cataclysmic demise. David Holway addresses the challenges of emerging invasive species in our ecosystem. Oliver Ryder discusses the accelerated rate of loss of species due to human activities. Patricia Hunt talks about how human made chemicals and pollutants are impacting global fertility rates. Series: "CARTA ..read more
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CARTA: Humans: The Planet-Altering Apes with Rob Knight Alice Gorman and Asher Rosinger
Evolution (Audio)
by UCTV: UC San Diego
2M ago
As humans have evolved, so has our ability to drastically alter the planet we call home. In this collection of talks from the CARTA symposium, "Humans: The Planet-Altering Apes" you will learn about specific examples on how humans have changed Earth and what can be done to prevent its cataclysmic demise. Rob Knight will talk about how all microbiomes that have been studies are impacted by human activity. Alice Goramn discusses how accumulating space debris surrounding our planet that may prevent us from leaving the Earth in the future. Asher Rosinger addresses the global water challenges that ..read more
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CARTA: Humans: The Planet-Altering Apes with Walter Willett Jessica Thompson David Tilman
Evolution (Audio)
by UCTV: UC San Diego
2M ago
As humans have evolved, so has our ability to drastically alter the planet we call home. In this collection of talks from the CARTA symposium, "Humans: The Planet-Altering Apes" you will learn about specific examples on how humans have changed Earth and what can be done to prevent its cataclysmic demise. Walter Willett will discuss how climate change is having devastating effects that will undermine our ability to feed the world’s growing population. Jessica Thompson talks about humans transformed the environment and the damage it has done to our ecosystem. Finally, David Tilman addresses the ..read more
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CARTA - Humans: The Planet Altering Apes - Questions Answers and Closing Remarks (Margaret Schoeninger)
Evolution (Audio)
by UCTV: UC San Diego
3M ago
This CARTA public symposia will address specific examples of how humans have drastically altered the planet. Acknowledged experts will discuss clearly defined global-scale negative impacts on planet earth, our life support system (other than climate change, population growth and infectious diseases, which are well-known). Each talk will succinctly describe a specific impact, the role that our species has played, and conclude with ongoing or potential approaches to mitigation. In the process, we are coming full circle to Anthropogeny, asking how a single species could have evolved the ability t ..read more
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Triton Talks: How Extinct Cats Help Explain the World
Evolution (Audio)
by UCTV: UC San Diego
3M ago
Why does history keep repeating itself? And what can cats tell us about this? Ashley Poust, Ph.D., is a paleontology researcher at the San Diego Natural History Museum. He focuses on vertebrates and evolutionary biology and explains how the study of extinct cats, like the sabertooth, can help us reconstruct ancient environments, gain a better understanding of our origins, see deeper into life's processes, and at the highest level, have a new view of the world. Series: "Triton Talks" [Science] [Show ID: 38073 ..read more
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CARTA - Humans: The Planet-Altering Apes - Large-scale Human Modification of the Planetary Microbiome with Rob Knight
Evolution (Audio)
by UCTV: UC San Diego
4M ago
Through the Earth Microbiome Program and complementary efforts, we have sampled a broad range of microbiomes from across the planet. All microbiomes that have been studied are impacted by human activity — the effects of industrialization on the human microbiome are best characterized, but capture of animals in zoos, domestication, modification of soils through agricultural practices, and modification of freshwater and marine microbiomes have all been well characterized. Indeed, the pervasive role of environmental microbiomes in biogeochemical cycles necessary to sustain life led to a position ..read more
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CARTA - Humans: The Planet-Altering Apes - Accumulating Space Debris and the Risk of Kessler Syndrome with Alice Gorman
Evolution (Audio)
by UCTV: UC San Diego
5M ago
In 1957, the USSR launched Sputnik 1, the first human object to leave Earth. In the 65 years since then the region of Earth orbit has become filled with satellites and space junk. The proliferation of debris has led to the prediction of Kessler Syndrome, a state where a never-ending cascade of collisions between orbital objects renders parts of space unusable for human purposes. However, there are many different ways to look at the space junk surrounding Earth. For example, it is also an archaeological record of humanity’s first steps into outer space, a cultural landscape created by the combi ..read more
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CARTA - Humans: The Planet-Altering Apes - Loss of Species Loss of Genetic Variation and the Future of Earth’s Biota with Oliver Ryder
Evolution (Audio)
by UCTV: UC San Diego
5M ago
We are experiencing an accelerated rate of loss of species due to human activities. This anthropogenic phenomenon extends beyond extinction. It encompasses an expanded loss of biodiversity as the genetic diversity of species diminish, reducing gene pools to “gene puddles.” We know details of species extinctions events from the fossil record, historical record, and from ancient DNA studies, and that historical processes shape extinction risk. Habitat loss and changing eco-environmental conditions, competition, and other factors produce genomic impacts, also influencing extinction risk. The lega ..read more
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CARTA - Humans: The Planet-Altering Apes - Global Alteration of the Nitrogen Cycles by Humans with David Tilman
Evolution (Audio)
by UCTV: UC San Diego
5M ago
Humans now annually add more biologically available nitrogen to the Earth’s land surfaces than do all natural processes. For 3 billion years, available nitrogen had been the major limiting currency for life on Earth. The recent human disruption of the global nitrogen cycle is causing major environmental harm, including water and air pollution, marine dead zones, 10% of global greenhouse gas emissions, and species extinctions. Three major ways to solve this nitrogen problem are: (1) much more efficient global use of nitrogen fertilizers; (2) shifts to lower-meat and healthier diets; and (3) hal ..read more
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Sea Urchins and Sea Slugs
Evolution (Audio)
by UCTV: UC San Diego
6M ago
Amazing new technologies in developmental biology and genetics research are allowing scientists to begin to answer long standing questions such as – how does a single fertilized egg cell transform into a complex animal? Why does the embryo of a marine organism like a sea slug develop differently from that of a sea urchin? Join Scripps Developmental Biologist Deirdre Lyons as she describes how she and her colleagues are pushing the limits of our knowledge to understand these intriguing questions and the long history and diversity of life on our planet. Series: "Jeffrey B. Graham Perspectives on ..read more
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