Marsh Mailing-09/06
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Spring2008 MadronaMarshPreserveandNatureCenter CallsintheNight The day had been long and its last light was quickly flooded my ears! The fading into night. Tired, I drove to the Maple Sepulveda frog songs had begun Sump—I needed to check the water level after a day of and they were so loud pumping water up to the Preserve. In the half-light of I could no longer hear the evening, walking along the uneven gravel road my the cars driving along feet kicked up pebbles. I watched them scatter ahead of Sepulveda! Over- me. Actually the pebbles seemed to hop on ahead of come with joy, I started me––just like frogs. I began wondering about the frogs using my cell phone to ––had the last two years of drought caused them to die call people. I just had off? Would there be any this year? I had only heard a to share the momen- few to date––the chorus I had heard a few days earlier tous occasion! With seemed quiet and far away. And I had found so many the speakerphone dead ones over the past six-months that a real amount turned to full volume, of worry had built up in me. I yelled, “Hey, can you hear that? They’re Our Pacific Tree Frog The water level was fine. I shut down the pump for back – they have sur- Photo by Jack Ludwick. the night, and headed back along the road toward my vived!” ––T.D. car. All of a sudden, an overwhelming number of calls TheProgramsofJanuaryandFebruary I have received a few calls asking why there has a long story short, four of the seven Madrona Marsh Staff not been a “Month in Review” for several months. To make have suffered a loss or serious illness in their families over the last five months. Nonetheless, showing tremen- dous strength of character and dedication to the Pre- serve, we have run all programs scheduled over those months. Many of them were given by us––the remain- der by the Friends of Madrona Marsh. In many ways the support of a few of the Friends has carried us during this very difficult time. I cannot think of words to express my sincere gratitude to my staff and to the Friends for their selfless assistance and encouragement. Please know you are greatly appreciated…. The programs at Madrona over the past few months have been amazing! The beauty of the spring, the mag- nificence of the water in the lush green wetlands and the Preserve’s growing popularity all have combined to cause a surge in both visitors to the Marsh and attendance in programs. ––Tracy Drake Into the Wetlands. Photo by Andre, Age 13. Manager/Naturalist -1- New“AskUs”Feature — Bill Arrowsmith Visitors to Madrona Marsh ask many interesting eases. Vector Control could spray chemicals to con- questions, and we’d like to share some of the better trol the mosquitoes, but the preferred method is a more ones, and their answers, with the readers of Marsh natural, and less dangerous, one. As soon as we have Mailing. Starting with this issue we have begun a new pools of standing water on the Marsh, Vector Control feature called “Ask Us” (with apologies to the Daily stocks the pools with a tiny fish, about the size of a Breeze, whom we blatantly copy). If you have a ques- guppy, called gambusia (gambusia affinis), or tion about the preserve or the Nature Center, please mosquitofish. The mosquitofish love to eat the larvae send it to us at: P.O. Box 5078, Torrance, CA 90510, of the mosquito, as fast as the larvae hatch from eggs; or drop it off at the Nature Center. they can eat 100 a day! Question: I was recently on the preserve and That’s great, but what does it have to do with noticed a chicken coop, with a half dozen chickens, the chickens? This is where it gets interesting. right in the center, next to some storage sheds. Why is there a chicken coop on the Marsh? Fact 3: Mosquitoes like to bite some birds as much as (or more than) they like to bite us humans, Answer: Good question, but first a few back- and chickens are birds that they love to bite. ground facts: But before you feel too sorry for the chickens, con- Fact 1: As you may know, Madrona Marsh typi- sider: cally is covered with anywhere from 5 to 20 acres of water in the winter and spring, after the winter rains. Fact 4: Chickens do not become ill from encepha- This water comes entirely from rainfall, and slowly litis or West Nile Virus, because they are able to form evaporates and percolates into the ground until it com- antibodies which protect them from the disease. The pletely disappears, usually by mid summer. To sum- chickens in the coop on the Marsh are called “Sentinel marize, the Marsh has standing water at least 4 or 5 Chickens”, and they are put there and cared for by the months every year. LA Vector Control District personnel, who use the Sen- tinels (lookouts) to be sure the mosquitofish are doing Fact 2: Any place you have stagnant water, you their job and that we don’t have any bad, disease-bear- run the risk of having mosquitoes breed. And some ing mosquitoes in Madrona Marsh. mosquitoes carry dangerous diseases, such as West Nile Virus or several forms of encephalitis. Once a week personnel come to the Marsh and extract a small amount of blood from the chickens, then So we have a potentially dangerous situation, ev- take the blood to a laboratory and examine it under a ery year, unless something is done to control these mos- microscope to see if it contains any antibodies. If so, quitoes. Here we get help from an agency called Los they know that we have disease-bearing mosquitoes Angeles County Vector Control. Vectors are any ani- on the Marsh and they need to take further action: ei- mals, like mosquitoes, which carry contagious dis- ther additional gambusia or possibly chemical spray- ing. Fortunately, at Madrona Marsh, we have rarely had to take such action; the mosquitofish have done The Marsh Mailing is a quarterly newsletter their job well! designed to provide information about activities and upcoming events at or relating to the Mad- As a footnote: the LA County Vector Control dis- rona Marsh Preserve. Contributions are welcome trict stocks areas of standing water with mosquitofish and may be e-mailed to Diane Gonsalves at all over the county, not just at Madrona Marsh. In fact, [email protected] or Bill Arrowsmith, if you have a problem of stagnant water at your home, [email protected] or dropped off or they will supply mosquitofish free of charge. We are mailed to the Nature Center. quite fortunate to be protected by this agency, their tiny fish, and the Sentinel Chickens! -2- fromthepresident –Bill Arrowsmith Our wonderful Nature Center, now seven years old, I would like to thank all the people who helped to is an integral part of almost every program and activity make this project a great success:Fran Arrowsmith, who at the Marsh, from classes and presentations in the ran the project for the Friends and coordinated with our classroom or laboratory to research projects in the design and fabrication company, Split Rock Studios, and curation lab.It houses a fabulous Gift Shop run by the also with our taxidermist and with the Board; Connie Friends of Madrona Marsh, with all profits used for Marsh Vadheim, who supplied the excellent photographs which programs.And the Director and Naturalist for the Pre- were enlarged to make backgrounds for the cases; Igor serve, Ms. Tracy Drake, has her office and staff here. Carogodin, our prize-winning taxidermist; Split Rock art- ist Carlyn Iverson, whose dioramas are magnificent; Ron But there is one more important area of the center, Libbrecht, who extended his beautiful mural to accom- one that many visitors overlook.And that’s a shame, modate our display case; Tracy Drake, who was sup- because the Exhibit Hall is the very essence of the Na- portive and helpful with every phase of this project; the ture Center, as it provides a basic understanding of what City of Torrance, who paid for our new taxidermy; and Madrona Marsh is, how it formed and what habitats it my Board of Directors, who have been very patient and contains.You can visit the Hall first, so you’ll know what supportive through a project that was much larger than you’re about to see, or stop in after a walk on the Pre- any of us realized.Thank you all! serve to better understand something you encountered. If you have not The Friends of Madrona Marsh, led by Presidents visited Madrona Venora Lee and Bart Tendick and working with natural- Marsh since the ist Walt Wright, were instrumental in helping the City of winter rains, please Torrance plan this excellent interpretive facility. make plans to do so. It is absolutely spec- The Exhibit Hall has always been one of the jew- tacular, with our els of the Center–and it just got even better.The Friends showy seasonal have completed a project that took over a year to plan, visitors:Snowy and design and im- Great Egrets, North- plement.We now ern Shoveler ducks, have five new dis- American Wigeons, play cases for our Cinnamon Teal, Pair of Snowy Egrets taxidermy, each Blue-winged and with a diorama Green-winged Teal, Bufflehead ducks–you get the modeling a different idea.And those are just the water birds.