An unusual wind map

I was awakened by the wind, so I thought I'd share this unusual wind map. Click on the image below to see the dynamic version.

Chestnut leaves!

American chestnut leaves on March 14, 2012

I keep a few little American chestnuts (Castanea dentata) growing in pots for school visits and other demonstrations.  After two 80-degree days this week, I noticed today that one of the little chestnuts had leaves!

Trees in pots are more influenced by ambient temperatures.  The temperature extremes in regular soil are buffered, whereas potted soil can be warmed almost uniformly.  So, for the same reason that potted plants' roots are vulnerable to extreme cold, this little tree's leaves emerged as a response to warming, presumably triggered by a drop in abscisic acid and a corresponding increase in gibberellin levels.

Experiments in Spring Flooding

February 26, 2012

By inserting a modest weir and natural rocks in our smaller channel (lower left of top photo) before anticipated minor flooding, we hoped to reverse slow erosion and instead foster sediment deposit so we can add willow stakes and silver maple and sycamore seedlings.

The idea is to slow, stall or gently reverse the flow along the area vulnerable to erosion.  Before we began work, the channel-left bank (river-left or channel-left is always from the perspective of someone traveling downstream, so that means the bank on the right from the cameras perspective in these photos) had a five foot to eight-foot dropoff.

In the second photo you can see the swift flow in the center channel, with pooled water in the area of concern.

I'll share "after" photos when the water recedes.

First sightings - Robins, Narcissus and Bluebirds

American Robin Bill Purcell.  Next.

fronteraaudubon.org

I travel between Zones 6b and 7a several times a week, so I can often predict what's coming for Hampshire County at least one week in advance.

Last week I saw  American Robins (Turdus migratorius) and Daffodils (Narcissus spp.) in the city.  On a long walk on Saturday in Hampshire County I saw the first robin, many daffodil leaves, and another member of the thrush family, Eastern Bluebirds (Sialia sialis).  


This morning along the South Branch, there were robins and bluebirds everywhere.

Daffodils - February, 2012

Eastern Bluebird parents. Paula Apro of Eastford CT. 

First Crocuses

Shoots from bulbs are triggered almost entirely by sustained increase in temperature of the surrounding soil.  So in mild winters like this one, it's likely they will appear earlier this Spring.  We saw daffodil shoots (Narcissus sp.) over the weekend, and we saw our first crocus blooms (Crocus sp.) this morning.


Crocus is a genus of perennials in the iris family with about 80 species. Crocuses are native to Europe, the Middle East and Central Asia, and south to North Africa.  They are successful at nearly all altitudes, and that's one reason why they do well in the mid-Atlantic.

You've probably seen photos of crocuses blooming in the snow, and it sounds like we'll get the chance to see that tomorrow.

Frosty Mornings

First light on a frosty morning.

Diane and the dogs crossing the big field.

My oldest dog Korry stops back to check on why I'm kneeling.

Most people in the mid-Atlantic region will tell you that witnessing the change of season is important to them.  Of course, that's an underlying theme of this blog.  Based on my current understanding of others' interpretations of climate change data, we may have an increasingly warmer climate, but that will likely be experienced through irregular weather patterns, more snow rather than less, and increases in both flooding and drought.

As an educator, I also align more with those who are putting their energy into climate adaptation, rather than what may or may not be possible in reversing climate trends, which may be entirely due to anthropogenic causes.      I don't look forward to droughts or floods, but I certainly look forward to more snow.  I'm surprised we're still seeing temperature swings in January of 30 oF or more.

But for now it seems will have to settle for frosty and foggy mornings rather than snow.  

Eagles in the City

I was commenting that it has been more than three weeks since we've seen a Bald Eagle (Haliaeetus leucocephalus) along the South Branch.  Then today I received an email from my neighbor Greg in the Clarendon neighborhood of Arlington, VA (most densely populated county in the U.S.) that there was an eagle in his tree, and our neighbor Joan got these two great photos.







Best of all, there is good reason to believe the eagle may have been surveying Greg's flock of plastic flamingos, although I wish it would pick off some of the neighbor's free-roaming cats.   What might this mean for the Arlington Egg / Backyard Hen Initiative?  I learned there was another eagle spotted above the Arlington Career Center last month.

American (Common) Merganser

Mergansers in flight
Source: U.S. Fish and Wildlife Service 

Today was the first time we've seen Common Mergansers (Mergus merganser americanus), the american subspecies of the merganser known as the Goosander (M. m. merganser Linnaeus) in Europe.  These diving ducks always seem to appear just after we notice the South Branch of the Potomac has turned that familiar shade of winter green.


Mergansers have serrated bills, and like other diving ducks, their legs are positioned further back along their body.  This facilitates diving but also requires a running start to get up and out of the water.  They fish cooperatively and have a lot of other behaviors similar to cormorants, but they also nest in tree cavities.  I think of cormorants as among our most primitive birds, so it's interesting to consider these beautiful mergansers as modern semi-aquatic flying reptiles.

Be sure to use the database link in the upper right corner of this blog page to report what you're seeing.

South Branch Reached Action Level

I'm having difficulty determining just how much rainfall we received last week.  Our own South Branch Science Consortium Weather Station doesn't archive readings online, and with the Oldtown Bridge flooded, I didn't take the time to go to the Wood House from Romney and back on Thursday night.  I went to Romney for the watershed meeting hosted by Melissa Merritt for WVCA, but had to get back to Washington, D.C for meetings the next morning, and I couldn't afford the extra 90 minutes to get the data from the supporting laptop there.

My wife takes our more primitive rain gauges inside for the winter so the ice doesn't destroy them.  I'm a little suspicious of my annual accumulations too, as I've registered less than 30 inches this year, and I'll bet it's the wettest of the seven years I've been in Hampshire.

Every stream I passed from Goose Creek to the North River was significantly swollen, so I wasn't surprised by the spike on the South Branch at Springfield.

South Branch flooding, fresh tracks

(Click the photo to enlarge)

We always look forward to walking the beaches of the South Branch of the Potomac after the water recedes.  We have a particular spot where we always find a fresh collection of mammalian, avian and reptilian tracks.

If you recognize any tracks in this photo, post a comment.  Some of the tracks are from our German short-haired  pointers, who always beat us to the river on our walks.

Deer Management

This is the last week of deer season in Hampshire County until the brief winter private-property season at the end of December.  I've estimated between 40-55 deer per square mile around our area in northern Hampshire County.

Piebald white-tailed deer at Patuxent Wildlife Research Ctr.

Many deer management plans aim to reduce that population to under 20 deer per square mile.  Some metropolitan areas suffer from whitetailed populations over 100/mile2!

We're surrounded by the river on three sides and mountains on all four sides, so we have less immigration/emigration than most places.  As a result, we occasionally see evidence of a shrinking gene pool like unusual antlers and piebald deer.  Of course we also see a lot of tree damage.


This also suggests greater vulnerability to disease.  Not only do greater deer densities mean more interaction and the potential for spreading disease, but a reduced gene pool can also mean lesser resistance to all environmental challenges.

Venison Pizza

Hunting remains the best available option, particularly if you can convince hunters to harvest does.  I've lost enough young trees to antler rubs to appreciate harvest the bucks too, but harvesting a recently impregnated doe is much better for population management. 

My schedule this semester has been too busy to squeeze in any hunting, but my co-worker Shari brought in some ground venison this week.  I used over 1/2 pound, mixed with jalapeno peppers, on a single pizza. 

Ailanthus Fungus?

This is the first time I have ever seen a fungus growing on a living Ailanthus tree (Ailanthus altissima, Tree of Heaven).  I know we'd all love to see a natural attacker of these trees, but we could also expect that whatever killed a nearly invincible Ailanthus tree would likely be devastating to many other species.

I don't yet know what this fungus is, but it didn't take much research to discover there are several fungi and diseases of Ailanthus.  Joanne Rebbeck, of the U.S.Forest Service Northern Research Station in OH describes Verticillium wilt,  caused by Verticillium albo-atrum.  It was first detected in Pennsyvlania in 2002, and is caused by a soil-fungus that infects the vascular tissues of Ailanthus trees. She reports the infected trees die rapidly, typically within a growing season, and that it shows promise as a potential biological control agent of Ailanthus!  Unfortunately, Virginia Cooperative extension reports other vulnerable trees include, but are not limited to, maple, redbud, quince, ash, sassafras and slippery elm.  A few species have demonstrated resistance, including fir, hackberry, dogwood, fig, beech, sycamore, white oak and willow.  Read more here.



On the BugwoodWiki, I found lists of 32 arthropods and 13 fungi that are associated with the genus Ailanthus in China. The fungal species directly associated only with A. altissima include Phyllactinia ailanthi, Cercospora glandulosa, Phyllosticta ailanthi, and Pseudocercospora ailanthicola, Alternaria ailanthi, Aecidium ailanthi, and one unidentified Coleosporium species.

An article by Peter Feret in the Journal of Arboriculture mentions there are six species of fungi that attack
the foliage, and ten that attack the stem and vascular system, with another five species of decay fungi that have
been found in Ailanthus roots and rotting trunks.  But he doesn't provide any details, but cites a 1971 paper by Hepting that I haven't yet found.


Non-natural Controls


I don't know anyone that trusts USDA to introduce anything (sorry, APHIS and IPM friends!).   I favor the non-natural controls for Ailanthus. While I prefer Glyphos and Roundup mixes over the restricted use Garlon triclopr pesticides, my friends know my favorite product is almost the most fun:  T-190 by Ingersoll Rand. 

Big Sycamores

 

American sycamore, Green Spring / Levels, WV

Hampshire County is loaded with big sycamore trees (Platanus occidentalis).  Even small sycamores seem to have unusually large leaves, but even after many years we sometimes find leaves that are still impressive.  Of course, big green leaves mean there's more chlorophyll by which to convert sunlight to carbohydrates that make these trees grow fast and large.  So like most things in nature, their are both obvious and not so obvious correlations and causation among observable phenomena.

Frost in the shaded spots

As we walked along our normal trails through and around the wetlands we could see the effect of the sunlight on the frost, even though it was still below 0 C.

Moving indoors

We live in a house constructed from three, 100-year old barns. The design was based on a children's book by Wolo, in which a squirrel escaped a forest fire by jumping on a log and floating down the river to a home inside a tree, where it lived with a variety of other animals.

The Wood House was also designed to be a green home, built so that you could heat it with a candle.  The architect brags about this in his displays at the big Green Festival in Washington, D.C. each year.  I can't even heat it completely with our fancy catalytic re-burner Vermont Castings wood stove.

I don't need an infrared monitor or camera to prove there are gaps and leaks in which air escapes or gets in.  Instead, simply studying the number of critters that make their home in my home tells me all I need to know.  Especially this time of year, we've found plenty of Deer mice (Peromyscus maniculatus) and their close relatives, the White-footed mice (Peromyscus leucopus).  We've also found several flying squirrels (Glaucomys volans).

But we also find Black rat snakes (or "Black snakes", Pantherophis obsoletus), our largest snake in most of the mid-Atlantic.  To the horror of our wonderful house keeper, we find them as often as every two months, sometimes sitting in the middle of the kitchen floor!

I found this young black snake right inside the door.  You'll notice how distinct its pattern is, and you can also see that it had probably never been threatened before, and therefore very comfortable being handled by me.

Morning Fog

I took a few photos during our walk as the fog lifted this morning.  Little arachnids encased these thistles with webs, and I liked how they stood out from the backdrop of the cliffs across the river.

 Jimson Weed (Datura stramonium) is a poisonous plant with an attractive flower.  Some like the look of the rest of the plant (entirely poisonous), but I don't.

The toxins of Jimson Weed produce delirium, where fantasy seems like reality.  Of course that means at one time it probably had many recreational or medicinal uses.

This was a disappointing discovery:  the Mile-a-Minute weed  (Persicaria perfoliata) had produced a bright blue fruit.  I've never seen this before, largely because in previous years we would have removed all the Persicaria by now.

Some Color

The dry summer and wet September apparently wasn't to good for producing leaf color, but this was certainly a nice weekend.

The paw paws (Asimina triloba) along the river have turned a bright yellow.  Elsewhere along the Potomac this is a good time to find paw paw stands to go back next September to collect the very fragile fruit.  My trees are still too young.  Typically fruits begin appearing when the tree is between 3 and 4 inches in diameter.

There's an adult Bald eagle somewhere in the picture above on the left with the blue sky.  We see lots of eagles, but never seem to have a camera ready.

Preparing the Bird Feeders

While repairing and cleaning the bird feeders, we found this one had a surprise inside.  When I split the casing you could see the wasp larvae and their casings.  I'm still trying to determine exactly what species of wasp built this.

The Last Hibiscus Bloom?

I was surprised to see this full bloom on October 11.

Classroom Trees

Back in 2001, I was disappointed to see elementary kids sending pickup truck loads of seeds off to the state nurseries without keeping any to grow themselves.  Most teachers will tell you however, any tree planted on school grounds is vulnerable.  Even in urban areas, rodents, rabbits and deer can wipe out a class project overnight.  And well-meaning custodians sometimes get carried away with their weed-whackers and mowers.

So in 2006 I called the very nice folks at the Potomac Conservancy who ran the Growing Native program and told them about my strategies for growing trees inside classrooms.  We held some teacher workshops over the next few years and now many schools have Grow-Out Stations.  The slides from one of those workshops are still available on the Growing Native website and at TreesInSchools.org.or ChestnutsInSchools.org.


There's not much to it.  I collected more than 40 old recycling bins when Arlington County Virginia distributed larger bins, and gave most away to teachers.  You can find similar size bins anywhere, often for just a few dollars.  I continue witht he recycling theme by using corn-based plastic cups from my morning iced coffees, or from ubiquitous Big Gulp cups for individual planters within the larger bins.

Most tree seeds require cold stratification of 60 days or longer to germinate, easily simulated in a refrigerator. Some also require scarification to weaken the seed coat that allows the embryo to break free.  Others, like white oaks, will germinate almost as soon as they hit the ground.  You can use natural soil if it's loamy, but clay will harden, crack, and fail the plant.  Otherwise, consider potting mixes.

The most important step, particularly if you decide to keep the bins outside, is to protect the seeds from squirrels.  It may not be an exaggeration to say they're watching you while you plant these seeds.  If inside, the major threat seems to be from kids overwatering the young seedlings.

Cool Portable Field Microscopes

As a biology teacher, I was always glad to have a prism field microscope around, but these new hand-held tools are great if you've got a tablet (iPad), iPod, smart phone, or laptop with you.  Magnification is up to 200x.

Click on the top photo and look closely to see the little pollinators within the flower.

I'll post the company details here.