Mole

656 Words2 Pages

This project delves into a sandy beach ecosystem, especially in regards to the intertidal zone, otherwise known as the “swash zone”. Although the intertidal is a very unstable habitat it is home to a variety of organisms which play a key role in the ecosystem. Mole crabs for examples thrive in this habitat between land and sea. Because many animals, including fish, and birds eat Mole crabs, they can serve as a major indicator species and can help to determine the health of the environment. During this project our goal is to prove whether or not it is true that the commonly larger female mole crabs are located lower in the swash zone than the generally smaller male mole crabs, and why this may or may not be. This goal brings us to our scientific question. Is there a significant difference between the position and size of male and female mole crabs located in the swash zone? and why?
Because of the constantly shifting sand which is in a consistent state of change due to factors such as waves, tides, wind, seasons, and storms, “sandy beaches are some of the most demanding habitats of the marine world” (Anderson Genevieve, 2003 Sandy Beaches). However, despite the extreme conditions, a variety of organisms unique to sandy beaches are found in hefty numbers. Because of the rough environment, the inhabitants have evolved some interesting adaptations.
Sandy beaches have a variety of organisms which inhabit the shifting environment. “High tide waves tend to pile up drifting seaweed along the berm crest” (Anderson Genevieve, 2003 Sandy Beach Life). Beached seaweed attracts the attention of many beach critters. Kelp flies often swarm around the irresistible rotting piles of seaweed. Some other species that enjoy the kelp are tiny red mit...

... middle of paper ...

...lude various shorebirds such as Willets, Sanderlings, and Gulls, Blue Crabs, Ghost Crabs, and some fish"(Patricia B. Mitchell, 2008). The orange eggs on the bellies of female mole crabs make them especially delectable to fish. "The barred surfperch is a very common fish in the surf zone, and sand crabs have been found to make up 90% of its diet"(Farallones, The Pacific Mole Crab).
"The intertidal habitats along the West Coast of the United States are among the most diverse and productive of any region in the world" (LiMPETS, "Why Monitor?"). The environmental and education program known as LiMPETS(Long-term Monitoring Program and Experimental Training for Students) is a hands on program for students, educators and volunteer groups. In order to properly evaluate the health of California's intertidal systems, long-term monitoring is required to carry out this agenda.

Open Document