Coming Full Circle with LiMPETS

Having grown up in San Francisco, I was exposed to the endless nature that Northern California has to offer. I spent my childhood exploring the waters of Baker Beach, surfing the Northern California coastline and hiking and camping in the beautiful mountains of Desolation Wilderness. Waking up early for school every morning was made more enjoyable by the sound of the foghorn—which I have come to love—and the faint smell of the ocean. My interest in nature and the ocean was ingrained in me from a very young age, and was further developed into a passion through the exposure and experience I gained in my coursework at The Branson School. Each morning, as I crossed the Golden Gate Bridge on my way to school, I took in my surroundings—the fog hugged the tall pillars of the bridge and the rugged cliffs dropped steeply into the churning waters of the vast Pacific Ocean. I watched whales and dolphins splashing in the water from my car window. Questions started to pop up in my head. What caused the fog to concentrate in the bay and then disperse almost immediately upon entering Marin? Why were the whales more active during certain months of the year? How did this whole ecosystem work? My interest was sparked and my curiosity craved answers. 

 

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Oil? Spills? and Crabs? Oh my!

How did the 2007 oil spill in the San Francisco bay affect the population of sand crabs in the area? This question is important because sand crabs are significant to beach ecosystems; they are food for many animals, and they are also an indicator species. This means that scientists and researchers can look at sand crabs to determine the health and sustainability of beaches and other marine ecosystems. More

Crabtivating Sand Crab Distribution at Playa Del Rey Beach

Cleo, Jerome, Kate, and Gloria
Bishop O’Dowd High School

No need to feel clawstrophobic (or get crabby), there is plenty of room for all the sand crabs on Playa del Rey Beach! So, how has sand crab population changed over time on this Southern Californian beach? This question allows us to further understand the Southern California sand crab population.
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What about the Children?

Sand crabbingGianna, Jack, Peter, and Nathan
Bishop O’Dowd High School

After going on a trip to Ocean Beach in San Francisco and gathering data about the local sand crabs, we wondered how many of them were “recruits,” little crabs which are new to life on the beach. How does this number change over time? Once a recruit settles on a beach, it will spend the rest of its life there. So, a healthy recruit population means that there will be a healthy adult population in the future (unless there is an environmental hazard). As long as there are no environmental hazards or strange weather conditions, the portion of recruits can be used to predict future sand crab growth and decline.
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Battle for the Beach-Crustacean Nation

by Miles, Sophia, and Charlie
Bishop O’Dowd High School

A sharp, cold wind rips across the beach, chilling the shivering O’Dowd students to the core. But there is no room for weakness. The research must be conducted at any cost. As the oceans continue to be examined, the relationship between sand crabs and sanderlings remains unclear. The two species are locked in the age-old, evolutionary battle of predator and prey, but the other aspects of their interactions are unknown. Exploring the correlation between the abundance of sand crabs and the abundance of shorebirds on Ocean Beach is a key component of understanding the beach as a whole. This research is vastly important, as sand crabs act as prey for many species on the sandy beaches, and serve as an indicator species, or a species that serves as a gauge for a habitat’s health.
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Itch for Crabs? (Not those crabs!)

Mole crabby Brian, Somari, and Charles
Bishop O’Dowd High School

Have you ever looked down while at the beach, and seen tiny creatures rolling around, and live in the sand? These tiny creatures are called sand crabs and they are quite paramount to their ecosystem. You may be wondering why sand crabs are so important and it is because they are prey for many animals such as shorebirds and fish. As a species, they can determine whether or not the ecosystem will be healthy. sand crabs make up 80-90% of the intertidal invertebrate biomass. Males and females vary in sizes but the females tend to be larger.
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Little Crabs in a Big Storm

Sand crab in sandby Julia, Olivia, and Thomas
Bishop O’Dowd High School

Emerita analoga, or the common Pacific sand crab, is an small animal with a colossal impact on beach ecosystems. We will examine the population trend in sand crabs over time at ocean beach, and examine
possible environmental factors that could have caused this, specifically El Nino. The sand crab is an indicator species, so examining the health of their population will allow us to examine the health of the sandy beach ecosystem as a whole.

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Sand Crabs? That’s so Raven.

Julian, Lucas, and Lily
Bishop O’Dowd High School

Sand crabs are herbivores and an important food source for other beach organisms, specifically shorebirds. We assumed that if the sand crab population is thriving on a beach, then the shorebird population should be doing well too. We looked at data of sand crabs and shorebirds along the north-central California coast over the course of a year. Our original hypothesis was that if the population of sand crabs was high, then naturally the population of shorebirds would also be high. But, contrary to our hypothesis, a flourishing sand crab population means there are less shorebirds… More

Finding Meaningful and Lasting Connections with Our Local Marine Ecosystem

Author: Melea of the Branson School

The wind tickled our noses as we scaled down the steep trail to Duxbury Reef in Bolinas, CA for a monitoring of the rocky intertidal. Thrice a year, our Sustainable Seas club, which participates in the LiMPETS program, monitors Duxbury Reef, which we have adopted asimage3 our monitoring site since 2000. Peers from the Branson School enthusiastically shared anecdotes of past monitorings, marveling at the striking stripes of Anthopleura sola, also known as sunburst anemones, colorful, alien-looking nudibranchs, or stunning magenta sunsets they had witnessed. Scarcely anyone was on their phones (a rare occurrence for teenagers), and people seemed almost giddy to be outside and immersed in the cool, salty ocean air.

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Little Worlds: a day in the life of Sustainable Seas

Authors: Gaby and Jane

You are cruising along Sir Francis Drake Boulevard in a jam-packed suburban, each kid wrapped in infinite layers (of sweaters, hats, gloves, booties, and many many puffy jackets), snacking on homemade brownies, and bellowing the lyrics to one of the many archaic playlists found on old scratched-up CDs. Time flies as the car swerves around corner after corner, speeding through densely wooded forests, dry grasslands, quaint towns, and mountainous landscapes. And then just like that, you’ve arrived!

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