Experiencing the Wonders of Marine Biology

We collected data about sand crabs from Ocean Beach. From the data, we came up with a question about the sand crabs, and supported it with the data we collected. We compared our findings to that of other scientific resources, like the “Pacific Mole Crab” article. We were able to see if sand crabs changed from the time the articles were made to now. When we looked at the findings, we could come up with possible causes. We gathered the information and began to put it into a blog. This process helped us become more confident in science and in writing. It’s amazing that our research is contributing to the scientific world.

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Hey Folks! What’s Up With the Sand Crabs?

Have you ever seen a sand crab at the beach? If not, imagine little creatures with grey shells that wiggle backwards and live underneath the sand. You may ask yourself, why should we care about some tiny sand crabs?  Well the answer is simple, they are actually very important to a beach’s ecosystem, as they are the basis of the food web. By monitoring sand crabs, we can indicate the health of the entire beach.

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Sex in the Beach

Our group research question was, “What is the abundance of Recruits, compared to adult Males and Females, over Time (from 2003-2013) at Ocean Beach from the data collected by a specific school?” Basically, we asked if the number of juvenile sand crabs (aka recruits) has had any significant changes compared to the number of mature adults that are on the beach.

Your initial reaction to this question might be to ask, “Why should we care?”, because until now there’s a large chance you didn’t even know sand crabs existed. To answer that question our group had to take a step back, and understand the crabs role in the marine community. We have since learned that they are important food sources for the shore birds, and local fish so their populations reflect how those predators and even the crabs’ prey are doing. So, by tracking sand crab population,s scientists are able to keep tabs on how healthy places like Ocean Beach are, and to see if that marine community needs more attention.

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