Category Archives: Plankton

Amusing Monday: TED Ed video features Southern Resident orcas

Last week, a new animation was posted online describing the matriarchal social structure of our beloved killer whales, in which elder females serve as guides for generations of their living descendants. (See first video.)

The new video, part of the TED Ed collection of animations, focuses on the 74 Southern Resident orcas and how they stay with their mothers for life. The video’s creator, animal behaviorist Darren Croft, credits the Center for Whale Research with studies that have successfully identified every filial relationship among the Puget Sound orcas for more than 40 years.

The TED Ed collection includes hundreds of animations created by TED Conferences LLC, the media organization responsible for nearly 3,000 online TED Talks. TED combines the concepts Technology, Entertainment and Design (TED) and operates under the slogan “ideas worth spreading.” An annual conference is held in Vancouver, B.C., with smaller events held throughout North America, Europe and Asia.

The Ted Ed series was started six years ago to inspire students to discuss creative ideas, develop innovative concepts and become young leaders. TED Ed has developed a flexible curriculum that can be used by teachers or students themselves. Each video has a “create a lesson” button for teachers or students to adapt the video to their own situation and branch out into other ideas.

Students can organize themselves as a club in an after-school setting, work with a teacher in a classroom, become part of a larger ongoing program. or develop an idea alone or with a partner. The program is designed to teach students from ages 8 to 18 and welcomes participants over age 13. See “Get involved” or review the “frequently asked questions.”

The TED Ed videos cover a multitude of topics, including science, technology, health, history, art, literature, health and even riddles. Some are better than others, but the best ones provide tidbits of information that can actually cause one to change his or her way of thinking. YouTube has a large collection of TED Ed videos.

The new video about orca matrilines offers possible explanations for why female whales have been known to live well beyond their reproductive lifespan. Males and females tend to stay with their mothers for life, although males will interact with other pods for mating. As older females die off, their daughters become the new leaders of the matrilines, which together make up larger pods.

The video, called “The Amazing Grandmothers of the Killer Whale Pod,” has more than 142,000 views so far and more than 300 comments.

Other TED Ed videos I found worth watching include the second video on this page, “When will the next ice age happen?” and the third, “Jellyfish predate dinosaurs. How have they survived so long?” Also check out the following or search for subjects from the full list:

Amusing Monday: Earth becomes art when viewed from satellites

Scientists with the U.S. Geological Survey have created an “Earth-as-Art” collection of brilliant images from space, as seen from Landsat satellites.

Icy Vortex // Image: USGS, Landsat program

Some pictures of Earth formations are reminiscent of actual paintings; some include familiar objects; and some are like abstract creations. Some show the actual colors of earth, sea and sky, while some of the colors are created with filters to highlight natural colors or even to capture light beyond the visible spectrum.

These images remind me of the LIDAR images created by the Washington Department of Natural Resources, which I called works of art in a blog post nearly a year ago. See Water Ways, Dec. 11, 2017. I included images of Puget Sound among some satellite photos posted previously. See Water Ways, Sept.11, 2017.

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Hood Canal avoids a major fish kill following unwelcome conditions

Southern Hood Canal avoided a major fish kill this year, but for a few days in September it looked like conditions were set for low-oxygen waters to rise to the surface, leaving fish in a critical state with no place to go, experts say.

Data from the Hoodsport buoy show the rise of low-oxygen waters to the surface over time (purple color in top two graphs). // Graphic: NANOOS

Seth Book, a biologist with the Skokomish Tribe, has been keeping a close watch on a monitoring buoy at Hoodsport. Dissolved oxygen in deep waters reached a very low concentration near the end of September, raising concerns that if these waters were to rise to the surface they could suddenly lead to a deadly low-oxygen condition. This typically happens when south winds blow the surface waters to the north.

“I started asking around the community to see if anyone had seen evidence of low DO (fish at surface; dead fish; deep fish being observed or found in fishing nets at surface; diver observations) and luckily I had no reports,” Seth wrote to me in an email.

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Getting lost in the tangle of connections called the Puget Sound food web

I’m increasingly amazed at the interwoven nature of the Puget Sound food web. Whenever I become focused on a specific species — Chinook salmon, for example — one of the first questions I ask is: What is this species eating?

I soon learn that the answer depends on the size of the individual doing the eating. Prey for a baby salmon is much different from prey for an adult.

If you really want to learn about why a species is doing well or poorly, you need to look beyond prey availability for your species of interest and find out what the prey are eating as well. Healthy prey must be abundant for any species to do well, so the prey of the prey must also do well.

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Dry weather started early this year amid cloudy conditions

UPDATE:
July 5. Greg Johnson, who lives in Hansville and manages the Skunk Bay Weather station there, said the unusually high rainfall in June for Hansville, compared to the rest of the peninsula, was the result of the Puget Sound convergence zone settling over the area on several occasions. Weather conditions brought localized squalls during the month, he said, adding, “This is very unusual for us.”

The reading at Greg’s weather station, 1.98 inches for the month of June, was somewhat lower than the 2.26 inches recorded at Kitsap PUD’s weather station in Hansville.
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Cool, often cloudy conditions have helped obscure the fact that very little rain has fallen on the Kitsap Peninsula over the past two months.

Precipitation in Holly (click to enlarge)

Now that we are in the fourth quarter of the water year, we can see that rainfall levels for this year will be close to average for most areas on the peninsula. What might not be recognized, however, is that April was well above average, while May and June were well below average.

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