Monday, December 10, 2012

Silver lining to a dark cloud - Bat fungus

from today's Washington Post:

Research on stricken bats may help AIDS fight
(Greg Turner/ Pennsylvania Game Commission ) - A small brown bat is seen in May after it came out of hibernation with tearing of its wings. This is an example of what bats with white-nose fungus sometimes suffer in the same way that humans with AIDS do.

In a government lab where scientists slice open dead animals to study the exotic diseases that killed them, Carol Meteyer peered through a microscope at hundreds of little bats and started to notice something very weird.

The bats had managed to survive the white-nose fungus that had killed millions of other bats hibernating in caves, mostly in the Northeast. But they had succumbed to something else that had left their tiny corpses in tatters, their wings scorched and pocked with holes.
Meteyer finally realized what had happened: In the struggle to fight off the fungus that causes white-nose syndrome, the bats were killed by their own hyperaggressive immune systems.

Meteyer, a scientist for the U.S. Geological Survey, had stumbled upon a phenomenon never before seen in mammals in the wild. A similar finding had been observed only once before — in people with AIDS.

Now scientists hope studying the immunology of bats might help in the development of treatments for AIDS.


Read the whole story here.

Tuesday, December 4, 2012

Potomac Watershed Partnership 2012 Winter Information Exchange

December 11, 2012 (9am-3pm) – WVU Robert C. Byrd Health Sciences Center, 2400 Foundation Way, Martinsburg, WV – This year’s theme: Kids in the Wild: Engaging K-12 Students in Environmental Educational Experiences. 

Topics will include environmental literacy strategies, engaging students in local and national parks, classroom preparation for outdoor experiences, field trips, etc. To register, visit:http://www.cacaponinstitute.org/PWP/PWP_winter_2012_information_exchange_RSVP.htm. For more information, contact pwp@cacaponinstitute.org or 304-856-1385.

Friday, November 23, 2012

Gathering Osage Oranges

On a foggy morning my brother Brian and my nephew Luke transport the fruits of the Osage Orange (Maclura pomifera) to places along the flood plain where the seeds will be planted to develop a natural hedgerow/fence.  We have dozens of these trees on our farm, and soon we'll begin seeing the deer and squirrels relying on them for food.

(Click on the photo for a larger image.)

Friday, November 16, 2012

Leonid meteor shower tonight


The Leonid meteor shower will peak between sunset November 16th and dawn on the 17th. It will be visible in all timezones.
This is one of the brightest meteor showers of the year.
The Leonids (named from the constellation Leo, are associated with the comet Tempel-Tuttle as Earth moves through its meteoroid stream of particles ejected as the comet's frozen gases evaporate under the heat of the Sun whenever it's anywhere closer than Jupiter.  These tiny particles give off huge amounts of light when they impact Earth at over 70 km/s (that's 43 miles per SECOND).  

Saturday, November 10, 2012

Milkweed along the South Branch

Milkweed (Asclepias syriaca) along the South branch of the Potomac.  Last year we began culturing milkweed for schools with butterfly programs.


Milkweed sap has toxins called cardiac glycosides. When the caterpillars of the Monarch butterfly (Danaus plexippus) and other milkweed butterflies (subfamily Danainae in the family Nymphalidae) ingest the leaves of milkweed, the glycosides make the caterpillar poisonous to some predators. Adult butterflies retain the glycosides.

This useful table was prepared by students in Fairfax County Public Schools:

Animals Using as Food SourceAnimals Using as ShelterAssociations With Other Plants
OTHER
MonarchGoldenrod SpiderSilver MapleEastern Yellow Jacket Po
Milkweed BugAmerican Dog TickPokeweedChinese Mantid FP
Green LacewingChinese MantidSmooth CrabgrassAmerican Dog TickFP
Eastern Tiger SwallowtailAmerican GoldfinchQueen Anne's LaceRuby-throated Hummingbird Po
Painted LadyBlack and Yellow ArgiopeSmooth SumacEastern Tiger Swallowtail Po
Mourning CloakCarolina ChickadeeRed CloverClouded SulphurPo
Great Spangled FritillaryEastern MoleDevil's Beggar-tickHoney Bee Po
BuckeyeWhite-footed MouseLamb's QuartersMourning Cloak Po
Eastern Black SwallowtailGreen LacewingCommon RagweedPainted Lady Po
Pipevine SwallowtailJimsonweedGolden Northern Bumble Bee Po
Pearl CrescentBlack-eyed SusanGreen LacewingFP
Honey BeeBushy AsterPipevine Swallowtail Po
Golden Northern Bumble BeeKentucky BluegrassMonarch Pa
Black Carpenter AntCommon MulleinOrgan-pipe Mud Dauber Po
Ruby-throated Hummingbird
Cicada Killer
Eastern Yellow Jacket
Fungus Gnat
Clouded Sulphur
Bald-faced Hornet

Monday, November 5, 2012

Smithsonian Chestnuts

I took my dad, who maintains the Boyd American Chestnut nursery in Pennsylvania, to help winterize the Smithsonian Museum's nursery near Front Royal, Virginia.  Other members of the team recorded individual tree data.

The Smithsonian interns got practice driving in four-wheel drive on side slopes.

Saturday, November 3, 2012

Training Young Trees


Structural pruning on young trees will prevent a lot of the storm damage in mature trees.  Now University of California has a great on line video for home use.

Training Young Trees is simplified for home gardeners, but horticulture educators and green industry professionals can also benefit from this resource. The 18-minute video and its shorter chapters are available free at their YouTube Channel:  http://tinyurl.com/trainingyoungtrees.


  • Thumbnail18:53Training Young Trees39 views  1 month ago
  • Thumbnail0:51Chapter 1: Introduction6 views  1 month ago
  • Thumbnail1:20Chapter 2: Why Train Young Trees?1 view  1 month ago
  • Thumbnail0:49Chapter 3: What Does A Well-Trained Tree Look Like?2 views  1 month ago
  • Thumbnail0:55Chapter 4: What's the Investment?1 view  1 month ago
  • Thumbnail0:49Chapter 5: When Do I Prune and How Much?1 view  1 month ago
  • Thumbnail0:52Chapter 6: The 5 Steps to Training Young Trees5 views  1 month ago
  • Thumbnail0:48Chapter 7: Step 12 views  1 month ago
  • Thumbnail1:04Chapter 8: Step 23 views  1 month ago
  • Thumbnail1:14Chapter 9: Step 33 views  1 month ago
  • Thumbnail1:18Chapter 10: Step 41 view  1 month ago
  • Thumbnail0:58Chapter 11: Step 54 views  1 month ago
  • Thumbnail4:41Chapter 12: The 5 Steps in Action2 views  1 month ago
  • Thumbnail1:07Chapter 13: Tree Response to Training Over Time2 views  1 month ago
  • Thumbnail2:14Chapter 14: Summary and Review2 views  1 month ago