To register, select the event above. To become eligible to take advantage of the member discount for the Strolling Science Seminar Series go to https://crewtrus.mystagingwebsite.com/donate and clickon the DONATE button or call 239-657-2253.
A: Slash Pine in South Florida lacks data, probably because there is not a local lumber industry.
However, Roy DeLotelle, a researcher for Red-cockaded Woodpecker habitat in Collier County, has collected data on the age of pine trees important for the woodpeckers. It comes from coring pines in the woodpecker’s habitat in Picayune Strand in Collier County.
Slash Pines grow a little larger in the drier pine/palmetto forests (mesic flatwoods) than in the wetter pine/grass forests (hydric flatwoods), and there is a good deal of difference between individual trees. Note the variations between the individual dots and the
“average” line in the graph, so a tree’s diameter in DeLotell’s graph below may not tell the precise age.
In the field, biologists use a different indicator of an “old” pine tree: a flat top shape to the pine canopy.
In DeLotells’ graph of his data, DBH is the Diameter at Breast Height. The R-squared values show how well the line fits the data points. R-squared ranges between 0 and 1 with the higher number showing the line is a good fit for the data.
Slash Pines can easily live past 200 years, and there are many that old in Collier County.
Shoreline Fishing Spider (Dolomedes triton) By Dick Brewer
Q: Do all spiders bite, and are they poisonous?
A: There are two problems with this question: a technicality, and a set of false assumptions.
First, the technicality. “Poisonous” and “venomous” are two different things. No spider is poisonous — harmful to eat, breathe, or touch. Mushrooms are sometimes poisonous, but spiders are not. Spiders are venomous; their toxins are proteins which only work when injected.
Second, all spiders do bite, but most local spiders are harmless because they are not aggressive and will not bite indiscriminately, or their fangs are simply too small to nip through our comparatively thick skin. Just because they are venomous does not mean they are
dangerous to people.
Spider venom does not exist to harm creatures which are too large for spiders to eat, like humans. The purpose of spider venom is to subdue the spider’s prey, almost always insects. In brief, it’s an insecticide.
Nevertheless, all larger spiders with a body length of a half inch or more should be treated with caution. Avoid flicking them away from your body. People allergic to bee stings may react more strongly to the bite of a spider than an ordinary person.
Bees and wasps kill more people in the United States in one year than spiders and snakes combined kill in ten years, and dogs and cats kill or injure more people each year than bees and wasps. Yet most people like dogs and cats and fear spiders and snakes.
Below are first hand observations from our volunteer Dick Brewer. Who does weekly visits to Bird Rookery Swamp and very week sends us incredible stories of the magical 12 mile loop. If you would like to see more of his observations visit: http://www.dickbrewer.org/CREW.html
By Dick Brewer
“Water levels are down more, even after the recent rains. Consequently, gator and wading bird numbers are down too.
One Roseate Spoonbill spent most of the day at Ida’s Pond, so visitors coming in had a spoonbill, Banded Water Snake, gators, Anhingas, Red-bellied Turtle, Great Blue Heron, Little Blue Heron, and Great Egrets to greet them.
The “hot spot” for the day was past marker 2 where the barbed wire fence ends and a service road splits to the left. There’s a depressionnat the junction of the main tram and the service road where a River Otter spent time catching and eating Crayfish that were left. A young
Barred Owl was in a cypress overhead, and while I was talking with four women who were enjoying the otter and owl, a Yellow-billed Cuckoo called from behind us. Later, hikers and bikers all commented about the otter and owl, so it was a great day for everyone.
The tram between markers 6 and 3 hasn’t been mowed recently, so the higher grasses are attracting lots of butterfly species, especially skippers”.
With rainy season around the corner wildlife tracks will become more visible. Not everyone will see a Florida Panther in their lifetime but they are more likely to come upon their tracks. Though spotting and identifying a track is definitely harder than identifying a Florida Panther itself. Lucky for us FWC came out with a E-Z guide on how to ID panthers and their tracks:
Q: What should people do if they see a black bear on one of the trails?
A Florida Black Bear looks, listens, and sniffs the air. By Dick Brewer
A: Florida Black Bears are the only bear species that inhabit Florida. Safety tips are different with different species of bears due to their varying life histories. The following safety tips refer to black bears and not necessarily brown bears, Grizzly bears, or other bear species.
Think of a black bear as a large, stray dog in your neighborhood. Precautions you’d take with a stray dog apply to black bears too. Don’t make direct eye contact (a threat gesture), don’t run, and don’t turn your back to it.
First, make some noise (clapping hands, bell, whistle) so the bear knows that you are there. Surprising any wild animal is not a good thing.
Stand tall and make yourself look larger by raising your hands above your head. Adults should pick up and hold small children.
Then, back away slowly and get a safe distance away from the black bear. Just like dogs, black bears have a chase instinct and will go after something running from them even if they do not mean any harm. Once you are at a safe distance, you can snap a few photos and enjoy the moment.
Black bears in the wild are shy animals and generally not aggressive towards people. Exceptions would be a black bear that is strongly food conditioned and smells any food you are carrying, and a female black bear who is protecting her cubs. If you see a small cub seemingly by itself, back off immediately. The mother black bear is somewhere very close, and she is watching her cub and she is watching you.
A black bear is a large, powerful, wild animal. It pays to be cautious and to not provoke it, so know a little about black bear behavior before meeting one.
If a black bear stands on its hind legs, it’s not a threat; it just wants to get a better look and smell of the situation.
However, stamping its front legs, jaw popping (snapping its jaws together to make a popping noise), huffing (blowing air out of its nose and mouth quickly), or bluff charging (rushing toward a person but stopping before physically making contact) means it is nervous, and you need to back away from the black bear. Allow the black bear plenty of room to escape, which is all it really wants to do.
If a black bear does approach you and attack, hold your ground and fight back.
If camping at CREW, never store food or any heavily scented items (toothpaste, deodorant, etc.) in your tent. Always store it in a hard topped vehicle, hung from a tree at least 10 feet off the ground and 5 feet away from trees, or in a bear proof container that can be purchased at an outdoor recreation store. Food coolers are not bear proof containers. Click here to camp at CREW.
Online resource: http://www.myfwc.com/conservation/you-conserve/wildlife/black-bears
We had a great Strolling Science Seminar (SSS) series this season (say that 5 times fast). The SSS series started in 2011-2012 to provide adults with scientific knowledge from local experts. The experts engaged the participants in outdoor scientific study and enabled them to conduct citizen science as part of local, national, and global projects. Each event is filled with laughter, science, and new knowledge.
This year we were lucky to have:
Mad Batters of CREW- Kathleen Smith, FWC Biologist
Mosquitoes of the Marsh: The Good, the Bad, and the Ugly- Neil Wilkinson, FGCU
Fire & Water: Primal Forces Shaping CREW Wildlife Habitats- Jim Schortemeyer & Joe Bozzo, SFWMD
The Gopher Tortoise: How Protecting One Species Actually Protects Hundreds- Dr. John Herman, FGCU
Birding with the Master- Dr. Bernie Master & Tiffany Thornhill, FWC
We will start planning the 2015-2016 series of strolling science seminars this summer. If you have any ideas, comments, or contacts that you would like to share for a SSS event please email Jessi Drummond at education@crewtrus.mystagingwebsite.com, or call 239-657-2253. All ideas are welcomed!
Free guided walks are offered each Wednesday from 9 a.m.-12 p.m. each season (November through Easter).
Volunteer naturalists will lead a small group along the shell path to our boardwalk while discussing the history of Bird Rookery Swamp, the purpose of the watershed, the importance of the aquifer and the flora and fauna of this unique ecosystem.
Q: How old are the bigger slash pine trees?
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