Catalog Search Results
1) Ecosystems
Description
In this video lesson, Paul Andersen explains how ecosystems interact with biotic and abiotic factors. He explains and gives examples of food chains and food webs. He shows how limiting factors eventually lead to logistic growth. Real data from Yellowstone Park is used to show how populations interact. He ends the lesson by showing how human impacts can eventually lead to changes within an ecosystem.--Publisher.
Description
In this video lesson, Paul Andersen differentiates between biotic and abiotic factors. He explains how both abiotic and biotic factors can affect organisms at the level of the cell, the population and even the ecosystem. The complexities of biofilms, predator-prey relationships, and food webs are given as illustrative examples.--Publisher.
4) Communities
Description
In this video lesson, Paul Andersen explains the major classification terms in ecology and how a community can be measured by species composition and species diversity. The symbiosis of leaf cutter ants is included. The lesson ends with a discussion of population growth.--Publisher.
5) Populations
Description
In this video lesson, Paul Andersen explains how populations interact in an ecosystem. The symbiosis of several populations is based on effects that may be neutral, positive, or negative. Interactions like mutualism, commensalism, and parasitism are discussed. Human impacts to ecosystems are also considered using the invasive species kudzu.--Publisher.
Description
Gain valuable practice answering questions about biomass production, decomposition, nutrient cycling, and other topics related to the interactions of the biotic and abiotic components of ecosystems. This exercise includes 15 questions, plus detailed answer explanations that break down the key concepts for each question.
Author
Description
"To newly minted biologist James Estes, the sea otters he was studying in the leafy kelp forests off the coast of Alaska appeared to have an unbalanced relationship with their larger environment. Gorging themselves on the sea urchins that grazed among the kelp, these small charismatic mammals seemed to give little back in return. But as Estes dug deeper, he unearthed a far more complex relationship between the otter and its underwater environment,...
10) How Nature Works
Description
As an island nation in the Pacific, New Zealand is biologically diverse due to a number of very specific geologic, climatic, and geographic variables. In this episode, viewers will learn how these variables have affected New Zealand's flora and fauna and see how through the mapping of these changes we are better able to predict what the future may hold.
Author
Description
"The living world runs on genomic software-- what Dawn Field and Neil Davies call the 'biocode'- -the sum of all DNA on Earth. In Biocode, they tell the story of a new age of scientific discovery: the growing global effort to read and map the biocode, and what that might mean for the future"--Publisher's web site.
13) Deserts and Life
Author
Description
"We live on an unexplored planet, ignorant of more than eighty percent of the species that share our world. In this illustrated book, two eminent ecologists discuss the biological diversity of Earth, showing how the natural systems that surround us play an essential role in protecting our basic life-support systems." "Andrew Beattie and Paul Ehrlich tell us about the millions of species providing ecosystem services that maintain the quality of our...
Description
Journeying into the heart of equatorial Africa, this program joins Spanish primatologist Magdalena Bermejo and her husband, cinematographer German Illera, as Bermejo conducts groundbreaking research into the lives of western lowland gorillas. Viewers come to understand the discipline and perseverance required for such observation, as numerous challenges (including swarms of sweat bees and roving ants) try the patience of the researchers. Ultimately,...
16) Water Worlds
Description
This program begins high in the mountains of Iceland and ends at the coral reefs of the Maldives in an exploration of aquatic biomes that includes mountain streams, wetlands and swamps, coral reefs, and deep ocean. Along the way, viewers discover South America's Pantanal, the world's greatest wetland, and the Sundarbans - an immense mangrove swamp at the mouth of the Ganges in Bangladesh. Finally, sailing far out into the deep ocean, the video explains...
Description
Increasingly, marine researchers are finding that there are far more jellies and jellyfish in the world's oceans than previously believed. Indeed, these creatures may play an unexpectedly large role in ocean ecosystems. This science bulletin, which features spectacular underwater footage, follows scientists at the Monterey Bay Aquarium Research Institute as they retrieve jellies from the deep.
18) Seasonal Forest
Description
The ecosystems of seasonal forests undergo drastic change twice a year. In spring and autumn, the entire biotic community must transform itself at exactly the same time - and it can only do this if all its animal life is working together in perfect accord. This program observes the vast biome of North America's seasonal forests over the course of one year. Highlights include footage of flying squirrels leaping from tree to tree in the fall, a lynx's...
19) Grassland
Description
This program travels to the savannas of Kenya, the grasslands of Australia, and the Cerrado of Brazil to study the remarkable interaction of plants and animals in the grassland biome. Viewers learn about an ecosystem built around the acacia tree, and the role of rhinos in making the savanna fit for antelope in East Africa. In the Cerrado, the video reveals how maned wolves get by on a low nitrogen diet with the help of a fruit called the wolf apple....
Description
The boreal biome, the sweeping band of conifer forest just south of the Arctic Circle, is a key region for studying climate change - and not just the impacts. Certainly, with boreal forest fires growing more frequent and boreal permafrost melting dramatically, the area is responding very visibly to the rise of carbon in the atmosphere. Yet the trees and permafrost themselves are vast reservoirs of carbon. Ecologists like Scott Goetz of the Woods Hole...
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