Population ecology is the study of groups within a species that interact mostly with each other, and it examines how they live together in one geographic area to understand why these populations are different in one time and place than...

When the Bald Eagle population started to decline in the mid-20th century, scientists began to ask why. Population ecology, the study of organisms of the same species, played a big role in answering that question. In this episode of...

In this video Paul Andersen explains how population ecology studies the density, distribution, size, sex ration, and age structure of populations. Intrinsic growth rate and exponential growth calculations are included along with a...

Howcast - Learn why more beauty products aren't organic in this Howcast video featuring Alegre of Green and Greener.

In this video Paul Andersen talks about the impacts of human growth on the environment and on themselves. The population, affluence, and destructive technology of a population impact the environment according to the IPAT equation. An...

In this video Paul Andersen explores population dynamics of the human population. The population has show exponential growth since the industrial revolution and all countries will eventually move through the demographic transition. If...

In this video Paul Andersen explains how the world population has undergone exponential growth since the industrial revolution. Predicting the future world population is difficult because each country will grow at different rates. ...

Some reactions take in energy and some release energy. Why? And what are some common examples of each type of reaction? Chemistry - Reactions - Learning Points. An energy change occurs when reactions take place. Exothermic reactions...

If being alive on Earth were a contest, humans would win it hands down. We're like the Michael Phelps of being alive, but with 250,000 times more gold medals. Today Hank is here to tell us the specifics of why and how human population...

Hank wraps up the Crash Course on ecology by taking a look at the growing fields of conservation biology and restoration ecology, which use all the kung fu moves we've learned about in the past eleven weeks and apply them to protecting...

In this video Paul Andersen explains how ecosystems function. He begins with a description of how life on the planet is ordered from large to small in biomes, ecosystems, communities, population, and individuals. He describes the major...

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...

Learn how Robert Smalls led a daring escape aboard the Confederate ship, the Planter, and delivered 17 enslaved people to freedom. Discover his pivotal role in providing crucial intelligence to the Union, meeting President Lincoln, and...

With a better understanding of population ecology, we are ready to zoom out and look at community ecology, which involves interactions between species, as well as landscape ecology, which will broaden our understanding of ecosystems. How...

It describes the role of biological agents for controlling pests. It describes genetically modified organisms (using Bt microbe) and their uses as biocontrol agents.

In this lesson, students will learn about vertical translations of linear equations. They will explore how these translations affect the graph and algebraic representation of the equations. By understanding the similarities and...

Apprenez à gérer les informations confidentielles, les secrets commerciaux et les cadeaux d’affaires. Un cours de base sur la prise de décision éthique.

The best way to start a study of ecology is to look at the scales of ecology, from the smallest things the field studies, to the biggest. On the small end, ecologists can study individual organisms, as well as populations of those...

This engaging series of videos uses colorful animations and on-location footage to illustrate some of the amazing ways plants reproduce. The reproduction processes in bryophytes, ferns, gymnosperms, and angiosperms are highlighted....

In this video we look at a few keys words that you will come across throughout ecology. An ecosystem is made up of all of the communities that live in it, every single organism from small to big and lots of environmental factors like...

Loathed as a threat and nuisance, the wolf population in Yellowstone National Park was essentially wiped out by the mid 1920's. That changed in 1995, when the National Park Service reintroduced them there, with the goal of restoring a...

Explain ecosystem, environment its biotic and abiotic components, the levels of ecological hierarchy and the branches of ecology.

This video provides a brief overview of the topics covered in the Ecology Fundamentals series. It explains the terms species, population, and community, and emphasizes the importance of understanding the biotic and abiotic components of...

What's the next wave of the technology revolution? How will it affect business and society?