Showing posts with label sanctuary. Show all posts
Showing posts with label sanctuary. Show all posts

Monday, 15 March 2010

Gulf of the Farallones National Marine Sanctuary

Sanctuary Sam and I arrived at the Gulf of the Farallones National Marine Sanctuary offices in San Francisco, California today. This is quite near to the Cordell Banks Sanctuary offices I visited earlier this year. I’ve heard San Francisco is famous for its fog, and it was very dull when I came last, but today it was a beautiful, sunny day, and the Golden Gate Bridge, near the sanctuary offices, glowed a bright orangey-red – not golden at all!


Unlike the offshore Cordell Bank sanctuary, the Farallones sanctuary is right next to San Francisco where about 8 million people live. Lots of people, and lots of wildlife, all living side by side. The Farallones sanctuary protects the waters outside the Golden Gate Bridge and around the Farallon Islands, which are about 27 miles offshore. It also includes some shallow coastal areas, called estuaries, like Tomales Bay, and Bolinas Lagoon.
In this map you can see Gulf of the Farallones National Marine Sanctuary where I am now, the Cordell Banks Sanktuary where I visited before and Moneray Bay (my next destination)

But for now there So much to discover here! First we learned about the local wildlife with a Visitor Center tour. The visitors centre has life-sized replicas of white sharks and giant elephant seals.
I'm glad this great white shark is only a model. I know humans are not their usual prey but a little bear like me could easily be mistaken for a tasty morsel. My buddy Steve, back in the UK, teaches people about sharks and he has written books about sharks as well. Steve also has a seal shaped decoy which has been chewed up by great white sharks that the kids can handle.

The enormous elephant seal replicas were fabulous, and we even listened to recorded whale voices – something Sam has experienced before while actually swimming in the ocean with them! Awesome sounds!

The aquariums have big green and tiny pink anemones. They are so huge they look even more like plants.
 I was so surprised when I first discovered that sea anemones were actually animals. In another aquarium tank there was a monkeyface prickleback eel named Monty, some crabs, and a big abalone.

I learned that this part of the Pacific Ocean is one of the four most productive areas in the world because of something called “upwelling.” Along the coast here, strong springtime winds push the surface waters offshore and that brings cold water, which has lots of nutrients in it, up to the surface. Near the surface, the combination of nutrients and sunlight allows the tiny one-celled plants, called phytoplankton, to grow really fast – just like a garden that’s been fertilized. Lots of different kinds of animals eat this plankton, including little shrimp-like animals called krill. Krill is a very important food, and there’s so much of it here, giant blue whales come here in the summer to feed on and can eat up to four tons of it each day!

But many other kinds of animals live here, too: 36 species of marine mammals (like Sam’s buddies, the California sea lions, seals, sea otters, porpoises and dolphins), and thousands of different fish, birds and invertebrates – sea snails, limpets, sea stars and sea urchins. In fact, there is so much food here, that many animals travel thousands of miles just to come here and feed, including seabirds and even sea turtles. One bird, the Black-footed Albatross, flies here from Hawaii to get food to bring back for its chicks. It takes the bird three weeks to make the trip here and back – that is a really long way to go for a grocery run!

Black footed albatross

The Farallon Islands, a very rocky and jagged group of rocks, aren’t actually part of the sanctuary, but are a National Wildlife Reserve where hundreds of thousands of seabirds nest, and five types of seals and sea lions come ashore to rest or have their pups (babies).


There are no schools or shops on the islands, not even a dock: to get on the island, a crane lifts people and supplies from a boat onto ledge. That must be exciting – and maybe just a bit scary. Only a few scientists can live on the island at a time, to make sure the wildlife won’t be disturbed.

The Sanctuary Visitor Center exhibits gave us just a sneak preview of different animals and habitats of the sanctuary. We got to get an up-close look at some these animals in the visitors centre aquariums, and found some of the same creatures under the dock and among the rocks and sand on the beach outside the visitors centre. We are hoping to encounter even more of them out in the wild during the rest of our visit.

All the animals - the tiniest krill, the birds, seals, fish, whales and even sharks that feed in the sanctuary waters around the islands, and the humans that fish or swim in these waters need a clean, healthy ocean to survive. And that’s why this area is a sanctuary – because things like ocean dumping and oil drilling that would pollute the water, or disturbing wildlife are not allowed. It’s good for them, and good for us.

Wednesday, 27 January 2010

Earthquakes, safety at sea and studying oceans

Hi all

I found out today that it’s not just the oceans that are very complex, the whole planet is. While the earth surface seems to be solid to us the earth’s surface is actually made up of separate pieces which are called plates. They all fit together a bit like a jig-saw puzzle. These plates are constantly moving, but very slowly. In fact in a year the plates will only have moved a few centimeters. The places where these plates fit together are called fault lines. These are also places where earthquakes can occur. This is quite a difficult topic to cover in my blog so if you want to find out more about these plates and fault lines you can check out the web link below.
http://www.moorlandschool.co.uk/earth/tectonic.htm

The reason I mention this is because I found out that California has a major fault line. I discovered this was called the San Andreas fault, which is a fault that runs throughout California and is famous for causing the 1906 earthquake that nearly devastated the city of San Francisco. There are many fault lines in the Bay Area that are active and produce quakes. Jennifer, one of the education people here at Cordell Bank National Marine Sanctuary took me and Sam to see where part of the fault line is. Although you can see the fault lines marked on maps, you can’t see the actual fault line in real life. However, Jennifer showed me the blue poles that mark where the fault line runs.
I was interested to hear that the San Andreas fault separates the continental plate from the Pacific plate, so I could not resist hopping between plates over the fault line and back again!

Unfortunately I was unable to visit Cordell Bank itself, as its 20 miles offshore and the ocean is quite wild here in the winter time. There has been a powerful storm in the area for sometime so the seas have been quite unsafe for me to visit, so instead the staff at Cordell Bank showed me some of the stuff they use to learn about the waters at Cordell Bank National Marine Sanctuary.

Jennifer showed me a special coat called a “float coat”. They don’t come in small bear sizes so I tried on a human sized one which as you can see is a little big for me, but it was still warm and toasty!

These coats have built in flotation for researchers on a boat, so they can be safe and stay warm too. If they do accidentally fall in the water the coat will keep them afloat. Its water proof as well! Sam said the air temperatures out on the Pacific can be quite chilly even during the summer months, so if you don’t have fur like me, layering clothes for warmth is important.

Check out this crazy instrument. This is a CTD, instrument which stands for Conductivity, Temperature, and Depth. The frame houses special sensors which records information about the surrounding water. The instrument is lowered to just above the seafloor and collects data the whole way down to help scientists understand what the water column is like. A water column is an imaginary area of water (column shaped) from surface of the ocean down to the seabed. Apparently when they do this test near shore outside of San Francisco, they can detect the fresh water that runs out of the San Francisco Bay, whereas farther offshore and north away from the bay, there is much less fresh water to be detected.
The staff here also have a special submersible (like a miniature submarine) to help the research team use to help them monitor and explore the seafloor habitats of Cordell Bank.

They gave me a controlled model one for me to see. Of course this one is even too small for me, but you get the idea. In an area like this, where the habitats are too deep to SCUBA dive in, this is a great way to learn about this sanctuary.

Bye for now, Ed