KQED, Teachers' Domain
Video length 7:42 min.Learn more about Teaching Climate Literacy and Energy Awareness»
See how this Video supports the Next Generation Science Standards»
Middle School: 4 Disciplinary Core Ideas, 2 Cross Cutting Concepts
High School: 6 Disciplinary Core Ideas, 2 Cross Cutting Concepts
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About the Science
- The video contains a discussion of the original wildlife surveys done by Grinnell. The specimens collected around 1908 have provided a basis of comparison for recent re-surveys in Yosemite. These comparisons indicate that as temperatures rise, low-altitude species are shifting their habitat up in elevation or are dying out. The next effect is a loss of genetic diversity.
Comments from expert scientist:
- Provides history of wildlife surveys and shows the importance of the records
- Shows importance of field notes and maps
- Shows that animals have moved to higher elevations (9 species of small mammals)
- Shows that some animals (alpine chipmunks) have not moved elevation, but rather have died off
- Introduces natural selection and biodiversity significance
About the Pedagogy
- The material is presented in a story-like format with historic photographs and a strong human interest element. It describes the original Grinnell survey, the development of specimen collections, and the comparison with the recent survey.
- A good blend of how science and observations of the past are used in the context of modern science and technology.
- Can be used to teach the nature of science because it shows how data collected in the past can be used with current studies for comparison.
- There is a lesson plan, educator's guide, and background material on the web page for this video.
Next Generation Science Standards See how this Video supports:
Disciplinary Core Ideas: 4
MS-ESS3.C1:Human activities have significantly altered the biosphere, sometimes damaging or destroying natural habitats and causing the extinction of other species. But changes to Earth’s environments can have different impacts (negative and positive) for different living things.
MS-LS2.C1:Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
MS-LS2.C2:Biodiversity describes the variety of species found in Earth’s terrestrial and oceanic ecosystems. The completeness or integrity of an ecosystem’s biodiversity is often used as a measure of its health
MS-LS4.D1:Changes in biodiversity can influence humans’ resources, such as food, energy, and medicines, as well as ecosystem services that humans rely on—for example, water purification and recycling.
Cross Cutting Concepts: 2
MS-C1.2: Patterns in rates of change and other numerical relationships can provide information about natural and human designed systems
MS-C2.2:Cause and effect relationships may be used to predict phenomena in natural or designed systems.
Disciplinary Core Ideas: 6
HS-ESS3.C1:The sustainability of human societies and the biodiversity that supports them requires responsible management of natural resources.
HS-LS2.C1:A complex set of interactions within an ecosystem can keep its numbers and types of organisms relatively constant over long periods of time under stable conditions. If a modest biological or physical disturbance to an ecosystem occurs, it may return to its more or less original status (i.e., the ecosystem is resilient), as opposed to becoming a very different ecosystem. Extreme fluctuations in conditions or the size of any population, however, can challenge the functioning of ecosystems in terms of resources and habitat availability.
HS-LS2.C2:Moreover, anthropogenic changes (induced by human activity) in the environment—including habitat destruction, pollution, introduction of invasive species, overexploitation, and climate change—can disrupt an ecosystem and threaten the survival of some species.
HS-LS4.C3:Adaptation also means that the distribution of traits in a population can change when conditions change.
HS-LS4.C4:Changes in the physical environment, whether naturally occurring or human induced, have thus contributed to the expansion of some species, the emergence of new distinct species as populations diverge under different conditions, and the decline–and sometimes the extinction–of some species.
HS-LS4.D1:Humans depend on the living world for the resources and other benefits provided by biodiversity. But human activity is also having adverse impacts on biodiversity through overpopulation, overexploitation, habitat destruction, pollution, introduction of invasive species, and climate change. Thus sustaining biodiversity so that ecosystem functioning and productivity are maintained is essential to supporting and enhancing life on Earth. Sustaining biodiversity also aids humanity by preserving landscapes of recreational or inspirational value.
Cross Cutting Concepts: 2
HS-C1.1:Different patterns may be observed at each of the scales at which a system is studied and can provide evidence for causality in explanations of phenomena
HS-C2.2:Cause and effect relationships can be suggested and predicted for complex natural and human designed systems by examining what is known about smaller scale mechanisms within the system.