A Conspiracy at the Mudflats

My daughter pointed out that the water level was noticeably higher when we arrived at the Newport Mudflats on Thursday. It is one of the few remaining estuaries in California, and I had read that several times, but it wasn't until today that I actually learned what that really meant.



After some searching, I found a lab manual from Fullerton College discussing the ecology of this area and here are some interesting things it says about this area:

...an estuary is an embayment along the coast of an ocean, with a generally steady supply of freshwater washed down from rivers. An estuary is a sort of mixing zone where water from the sea and water from the land meet each other.

The water environments in Upper Newport Bay are always changing. For example, during a flood tide (when the tide is coming in), sea water pushes into the bay, raises the water level and salinity, and changes the water temperature. During ebb tide, sea water retreats, the water level and salinity are lowered, and water temperature changes again. Tides strongly influence activity in the estuary. Each day, the bay experiences two high tides and two low tides.

The zone where these two water resources meet and mix is called the Null Zone. It consists of brackish water — less salty than sea water, and more salty than freshwater.

You can read the rest of the manual here. So interesting to read after knowing it first.

There were many shorebirds - I recognized willets, there were probably sandpipers, dowitchers, and godwits as well.



And here is a 'conspiracy' of black skimmers - the only bird in the US with a bigger lower mandible than upper. They drag their lower bills through the water to catch small fish.





Mudsnails...




We found a bunch of these Bermuda Sorrel - aka Bermuda Buttercup, African Woodsorrel, Sourgrass by the head of the trail where we park. The kids love the sour taste of their stems.