Tag: algae

The Sex Lives of Nonvascular Plants: Alternation of Generations – Crash Course Biology #36

The Sex Lives of Nonvascular Plants: Alternation of Generations – Crash Course Biology #36

By Micah Moen 100 Comments August 14, 2019

Plants! You’re familiar with their work: They turn all that carbon dioxide that we don’t want into the oxygen we do want, they’re all around us, and they’ve been around for a lot longer than animals. The plants that we see today probably evolved from a single species of algae that noodged itself onshore about […]

Eutrophication Explained

Eutrophication Explained

By Micah Moen 52 Comments August 13, 2019

[birds chirping, water flowing] [music] Plants require several things to grow. Most of us know that they need things like water, sunlight, and CO2, but plants also need a variety of nutrients as well: things like nitrogen and phosphorus. Usually, plants will get all the required nutrients from the soil through their roots. But, when […]

Attack of the killer algae – Eric Noel Muñoz

Attack of the killer algae – Eric Noel Muñoz

By Micah Moen 53 Comments August 12, 2019

We’ve all seen the movies where a monster, created by a scientist in a laboratory, escapes to wreak havoc on the outside world. But what if the monster was not some giant rampaging beast, destroying a city, but just a tiny amount of seaweed with the potential to disrupt entire coastal ecosystems? This is the […]

Life on Earth’s Cold Shoulder – Glacier ecosystems and climate change

Life on Earth’s Cold Shoulder – Glacier ecosystems and climate change

By Micah Moen 2 Comments August 11, 2019

Dr Joseph Cook: Climate change is one of the most important issues facing humans, in the 21st century because it threatens to destabilise everything, from the amount of land we have to live on, our food and water security, environmental hazards and extreme weather, even industry and commerce. The earth’s ice is increasingly being recognized […]

Old & Odd: Archaea, Bacteria & Protists – CrashCourse Biology #35

Old & Odd: Archaea, Bacteria & Protists – CrashCourse Biology #35

By Micah Moen 100 Comments August 11, 2019

We’ve spent the past few months talking about animals here on Crash Course, specifically human animals, because… well, because humans… we love talking about ourselves, and also because animals are just really interesting. But it’s high time that we talked about the rest of the living world. Because I hate to break it to ya, […]

Welcome to Plymouth Marine Laboratory

Welcome to Plymouth Marine Laboratory

By Micah Moen 1 Comment August 4, 2019

The ocean, a vast vibrant world and a major life support system, it underpins all of nature including humankind we all depend upon it but our population is increasing, more waste is produced more and new resources are needed and we’re changing the marine environment so it’s vital we understand and manage society’s impacts on […]

Coral Reefs 101 | National Geographic

Coral Reefs 101 | National Geographic

By Micah Moen 88 Comments August 4, 2019

(gentle music) – [Narrator] Coral reefs, their bright, vivid colors can be seen in tropical ocean waters around the globe. Beyond their brilliant appearance lies a hidden significance. Coral are animals. Though they may look like colorful plants, coral are, in fact, made up of tiny animals called polyps. These invertebrates can range from the […]

Ecological Health of U.S. Streams

Ecological Health of U.S. Streams

By Micah Moen 0 Comment July 31, 2019

[background noise 0:00 to 2:06]Bill Wilber:  Good morning. My name's Bill Wilber. I'm the chief of the US GeologicalSurvey's National Water Quality Assessment Program. It's indeed my pleasure to welcometo you to this briefing that we'll present findings on the ecological health of the nation'sstreams. This is actually the 31st briefing on Capitol Hill that […]

Life on Earth's Cold Shoulder - Glacier ecosystems and climate change

Life on Earth's Cold Shoulder – Glacier ecosystems and climate change

By Micah Moen 2 Comments July 31, 2019

climate change is one of the most important issues facing humans in the 21st century because it threatens to destabilize everything from the amount of land we have available to live on our food and water security environmental hazards extreme weather even industry in commerce the Earth's size has increasingly being recognized as a key […]

ENERGY FLOW THROUGH ECOSYSTEMS: calculations + exam practice

ENERGY FLOW THROUGH ECOSYSTEMS: calculations + exam practice

By Micah Moen 3 Comments July 30, 2019

so before we start to talk about the energy flow through an ecosystem we need to make several definitions first and the first definition is that of the habitat so this is the area or natural environment in which in organism lives and it's made up of two components abiotic factors which are nonliving factors […]