Colony Collapse Disorder video and article. 9. Hare and Lynx Populations. Once students understand the concept of populations, it is important to introduce the idea of population change. There are many reasons for population change – limited resources, predator-prey cycles, human ... Summary Once students understand the concept of populations, it is important to introduce the idea of population change. There are many reasons for population change – limited resources, predator-prey cycles, human impact, habitat change – to name but a few. In this activity, students learn to graph population data and then use their graphs to evaluate one of the most famous examples of population change, the predator-prey population cycle of the snowshoe hare and the Canada lynx. Teacher Background After learning about habitats, food webs and food chains, students can begin to discover the relationships between organisms and between organisms and their environment.
Populations are always changing. Another theory is that the lynx population determines the hare population. Food Chain and Food Web Notes and Worksheets. Microscope_activity. Producers_consumers. Tangled Web. EECO Goby Invasion. The Down the Drain Project. BioInteractive. Isle Royale Wolves. The Hidden Forest. Invasive Species Round Goby. Green Energy: Can We Save the Planet and Save Birds? Wildlife-smart wind power may be as close as it gets to "green energy. " But over vast swaths of America, the "smart" part is still more hot air than reality--especially when it comes to raptors. By Ted Williams Published: March-April 2014 "All wind projects, no matter where they are, kill birds.
The questions become how many, what kinds, and is the mortality 'acceptable'? " An accomplished birder himself, Herter also has impeccable credentials as an environmentalist. For such a non-polluting energy source, wind has become surprisingly divisive within the environmental community. When I asked Herter how wind developers can serve both masters, he offered this: "There will always be some form of conflict between renewable-energy projects and wildlife, but that conflict can be minimized with a little common sense.
Advances in turbine technology have made bird- and bat-smart wind projects far more feasible than they were even a decade ago. The U.S. Pesticide Accumulation in Sierra Nevada Frogs (7/26/2013 12:00:00 PM) SACRAMENTO, Calif. — A study on frogs in remote Sierra Nevada mountain habitats including Yosemite National Park and Giant Sequoia National Monument, detected concentrations of pesticides in frog tissue that potentially came from California's Central Valley sources. "Our results show that current-use pesticides, particularly fungicides, are accumulating in the bodies of Pacific chorus frogs in the Sierra Nevada," says Kelly Smalling, a research hydrologist with the U.S. Geological Survey and lead author of the study. "This is the first time we’ve detected many of these compounds, including fungicides, in the Sierra Nevada. The data generated by this study support past research on the potential of pesticides to be transported by wind or rain from the Central Valley to the Sierras.
" Researchers sampled seven sites across Lassen Volcanic National Park, Lake Tahoe, Yosemite National Park, Stanislaus National Forest and Giant Sequoia National Monument.