Coldest day

 12 Fahrenheit. 

After weeks of 'unseasonably', pleasantly mild December days in the 50's, 60's and above, a powerful cold front brought 0.75 inch rain and in 24 hours abruptly dropped our dawn temperature to near single digits. I returned to the SW Gate at 2 PM, interested to see how the sudden change had affected the Woods.

I disturbed an owl near the largest cottonwood and it flew silently south through the Woods. Walking east then north, to connect to Two Friends Trl, I passed the old leaning elm I had watched falling apart, for a decade or more. A large portion of the bole that had fallen, had a new distinctive reddish hue from some unusual decay fungus digesting the rotten wood. 

Wandering NW I came to the fallen big cottonwood and found illuminated ice stalactites hanging below the tree at two points. Rain had soaked its way through the massive bole, picking up a caramel colored mixture of decay products, then  dripped out at two points separated by 20 feet. I looked and could not find any reason for the water to have exited at those points. Another example of hidden ecological structure that develops, invisibly until revealed by unusual conditions.

It was a sunny afternoon at the NW pond, with 20 robins gathered at the SE corner, the warmest part of the shoreline where free water had melted and was available.

The Woods were quiet. No human truck noise on this second day of January. No insects or arthropods moving after last night's deep cold. Winds with the front had shaken a few new branches down, but nothing significant.

Quiet peaceful winter Sunday afternoon. Happily.

As I was leaving, a large white dog (stray, no collar) bounded into the Woods from the SW corner, saw me and ran east along the south boundary. It was the same dog I photographed in the Woods weeks ago. Not good that it is still here and using the Woods as part of its range. It could be an effective predator and its scent could intimidate vulnerable wildlife.

Rip Van Winkle Winter Day

 Cold (17F) winter morning. Decided to go to the Woods to see if the NW Pond had frozen over; but prudently waited until the afternoon, when it was a pleasant 38F. Wandered in past the NW pond to the big down cottonwood and decided I would find a sunny, warm, south-facing tree trunk. I sat and rested against a big box elder, with the warm sun on my face. Enjoyed a half hour nap, like Rip Van Winkle. Woke up looking through the forest of green ash and wondered just how many big trees I could see. It seemed like hundreds. Fun question: how many trees in Oliver's Woods? I think I'll try to estimate. Maybe make counts at random locations along twenty 20 m x 5 m transects and extrapolate to 67 acres. I'll guess somewhere between 67,000 and 190,000. 

Sitting quietly I began a 'Seton watch'. From my comfortable sunny seat I noticed strands of gossamer blowing in the wind.. and wondered if the abrupt change in the weather had produced a fluctuation in the local electric field and gotten spiders to go "ballooning" - as suggested by Morley, Gorham and Darwin. 

https://www.pbs.org/newshour/science/spiders-fly-on-the-currents-of-earths-electric-field

Electric Fields Elicit Ballooning in Spiders.  Erica L. Morley and Daniel Robert.  Current Biology 28, 2324–2330  July 23, 2018

I set out on a slow ramble avoiding the trails. I love to get lost in the Woods and see what new things and thoughts I find. Let new questions roll into my head. 

I came to an (unusual) group of four sycamores, two tall and two smaller. One of the trees looks like it could compete for the tallest tree in the Woods. I should start carrying around a forester's prism and recording the heights of the biggest trees I find. It would be interesting to know. Barring violent storm breakage, the sycamores could easily become the largest trees in the Woods. Four centuries ago this species was the largest species in the eastern US. Giant sycamores grew along the Mississippi River.

Patterns in the Woods reveal the past. I came to an old dead juniper with limbs top to bottom, a 'wolf tree' characteristic of trees growing in open fields or trees with lots of room and no over story competition. Then I saw another dead juniper much the same, and a third. They were in a line, suggesting they may have once lined the side of a road through the Woods - then perhaps an open field. It would be fun to map other limby juniper snags in the Woods and see if it was possible to reconstruct a map of where the old wagon roads may have been.

Last week I was wandering in the Woods in dry crackling leaves. Looking down at my feet, there was an accumulation of scores of small shells in a shallow depression, the size of a bathtub. Sphaeriid Fingernail clams and Physella aquatic snails (identified by mollusc experts at Oklahoma Biol Survey). No water for a quarter mile in any direction. Last winter & spring that portion of the Woods had been flooded under a couple inches of water for many months. The flood was contiguous with water from the cattails south of the NW Pond, an area that could normally sustain populations of aquatic molluscs like these two species. They would have been stranded in the small depression when the summer came and the forest dried.

Mild winter days

 Out to the Woods many times these past several days. I love watching how it changes. When the overhead canopy of leaves goes, I enjoy seeing what remains green and still able to carry on photosynthesis, still able to grow. 

List from this past few days: Acer Box Elder (green twigs), Allium Wild Chives (abundant in alluvial soil by wash), Carex Sedge, Cocculus Snailseed vine, Elaeagnus Autumn olive shrubs, Euonymus Strawberry bush/ Spindle trees two species vine and shrub, Geum Avens, Glechoma Creeping Charlie (abundant mixed with chickweed), Hedera English ivy, Ilex Holly,  Juniperus Eastern redcedar trees, Ligustrum Privet shrubs, Lonicera japonica Japanese honeysuckle vines, Lonicera maacki Amur honeysuckle shrubs, Lonicera fragrantissima honeysuckle shrubs, Smilax Greenbriers two species, Stellaria Chickweed (this covers the top quarter of the 12 acre sand dune), Symphoricarpos Coralberry, various moss species, ferns two species Asplenium? and Polypodium? 

.. and a few more:

Clematis, Virgin's bower vine (by Oak Bridge), Liriope Monkey grass, Nandina Heavenly bamboo, Rosa Wild rose (stem), Sambucus Elderberry, Viola violets, some unknown spp of grass and an unknown green herb with oval leaves.

I have enjoyed thinking about immortal trees, willows, oaks, mulberries and others that are pushed over with strong winds, falling far enough over to touch the ground, and root from there, or send up new suckers from the base of the tree. The new shoots can go on to become another full-sized tree (and then repeat the process),  regrowing continuously from the same tree. As long as the roots survive with enough stored starch to produce new shoots, these trees could go on and on. I wonder if there are any really old trees in these Woods.

The Pleurotus oyster mushrooms I noticed and enjoyed on the willows in mid November are gone now, chewed into lace like remnants that mark their former location. Happily, other oysters continue to put up fresh new mushrooms - these from large fallen pecan trees. Daughter Sarah gathered a basket and fried them up fresh with butter. 

And thinking about trees as metronomes for earthquakes or tremors. On Dec 15 at 11:59 CST I was sitting on a long, tilted bur oak stump, fifteen feet from the root ball to the end, when I felt a small shake in my seat. I wondered if the tree could be serving as an amplifier of subtle shaking of the ground from a small local earthquake tremor. At that instant there was also a roaring heavy truck just accelerating up Chautauqua and I thought maybe it was just a little ground shaking from the truck 50 feet away. But then there was a second small shake with no truck. Today I checked a record of local seismic activity and found that there had been small tremors that day in the same Cleveland county. Left me thinking about new forces I had not considered, acting on the many leaning trees in the Woods. Foresters have occasionally remarked on large leaning trees that suddenly crash for no apparent reason, no wind, no rain. I wonder if small tremors (< 1-2 on Richter scale) could explain many of these.

Always something new in the Woods. I am going there now to see what I find.

The Golden Woods is gone

 This early December afternoon I went to the Woods to see the rapid changes. Over the last fortnight there has been a near simultaneous fall of all the canopy leaves elm, pecan, walnut, mulberry, Kentucky coffee tree, southern hackberry, post oak, cottonwood, green ash, red bud and others. With the newly bare canopy, it is interesting to see what green is left. The chittamwood trees holds their leaves late. The biggest bur oaks still have yellow and green leaves. A few exotic invasive species stand out. Bradford pear leaves are golden or red and the few individual young trees are like beacons in the late last light of day. Numerous young invasive Chinese pistache still hold their compound leaves, glowing burnt orange. Two or three Euonymus spindle trees are still fully green as are the climbing green Euonymus vines. Both are producing their 'bursting heart' fruit capsules with red seeds. There are many invasive green privet shrubs widely distributed, although most of these were top-killed in February and have only produced new green leaves in the lower 2-3 feet. The exotic Elaeagnus autumn olive shrubs have fared better. There are a half dozen hollies with evergreen leaves, and of course the native juniper evergreens. But the overall impression is now of a bare canopy, and a bare Woods. It is the time when the shape of the individual trees is most visible. In the summer, with the filled canopy, individual stems are lost in the riot of green. At sunset I paused a while and enjoyed looking up the stems of two or three old persimmons with their pebbly bark to the orange clouds overhead. The curving stem framed the glowing clouds above.

LIfe and death and new sights in the Woods

 The past week of November has been a delightful time to be in the Woods. Cold nights and cool mornings have eliminated worries about ticks and other arthropod pests. The Woods turned gold. For two days, I could stand and watch leaves raining down.. no wind.. leaves completing their abscission and dropping, floating down, thousands and thousands. Soundless, or maybe just the slightest rasp as each leaf joined the leafy forest floor.

  The Woods are dry with another La Nina controlling central Oklahoma weather. The two week Mesonet picture shows zero precipitation here for this month. The prolonged drying created deep open cracks and fissures in the dry forest soil. Who knows how deep these fissures may extend, and what communities of soil invertebrates, springtails, rove beetles, oribatids, rollie pollies, daddy-longlegs and other creatures may shelter there on cold nights? I remember an earlier dry La Nina when a sudden substantial rain finally began to fill the dry soil fissures. I watched as inch deep pools bubbled for two days with the displacement of deep air as water replenished the soil. Forest trees elms, bur oaks, pecan, southern hackberry, walnut, coffee tree, willow, black haw, sycamore, hickory and more need a deep winter drink. They've had a good year of growth from the spring and early summer but are going dormant now with their roots dry.

  This fall there are changes in the Woods. The usual herd of around a half dozen to a dozen white-tailed deer that normally shelter in the Woods during the hunting season is now down to two. I found their beds yesterday morning walking the trail up to the North Rim. There were two fresh depressions, leaves flattened against the soil, about 3 feet apart, where the two deer had spent the night. The new construction and fencing on the south boundary limits the movement of wildlife in and out of the Woods from the wilder river lands. I saw the first cottontail rabbit I'd seen in the Woods in months, when it burst out of a brush pile at my feet and dashed away uphill into the forest.

  There is also death and new life visible, surprises to be found. I was surprised to see a beautiful, recently dead opossum, laying above the trail by the NW pond. It looked so peaceful. I sat and admired it, the details of its coat and feet and head for a quarter of an hour. There was a shed snake skin, looked like maybe a small green snake, thin and about 6 inches. It has been more than two years since I've seen a snake in Oliver's Woods. I know they must be there, but perhaps not common. There were also small clusters of downy feathers, slate gray and white just east of the big catalpa trees. A predator had taken a junco for a meal. There is surprising new life (puzzling) in the Woods too. A single pair of Missouri violets in full bloom, cream white petals, tinged lilac blue with darker sharp lines marking the way to the nectaries of the flower. In the SE Woods, dozens of mulberry trees and red elms with fully flushed bright green big new leaves in the lower canopy. Stealing the opportunity for a little more photosynthesis with the continued mild November days and sudden increase in available light after the fall of the upper canopy leaves.

  On the higher slopes above the East Pond the dully incandescent orange of Chinese pistache tree leaves and the ragged empty crowns of the big pecans and hackberries show they are ready for the coming season.

November's Golden Woods, Treasure hunts.

 After a long warm autumn, we now have cooler days. Fall colors have come - and gone quickly in the Woods. The green ash turned to gold, the elms turned gold and green, the big bur oaks turned gold. Going to the Woods at the end of the day with late light was like walking under canopies of gold. Yesterday I met via Zoom with others that care about the Woods and have worked there. Today I went to the Woods in the cold morning to continue swingblade cutting of trails overgrown from summer and pulling away heavy broken branches blocking trails. Good to get it done when it is too chilly for ticks and other arthropods to be active. In the afternoon I returned to begin again documenting all of the intriguing natural history, old galls on mulberry and sugarberry trees, orange roots of Osage orange, animal burrows needed for cold winter days ahead, the animal and plant worlds changing gears preparing for the cold. At 3  I heard in the trees close-by a barred owl "Who cooks for you? Who cooks for you-all?"  I returned the call but the owl was not impressed. A moment later the call was returned from away south in the Woods. For the past few years there have been at least two barred owls calling in the Woods.

  I decided to go for a treasure hunt and see if I could relocate a small patch of honey locust Gleditsia, the only ones I'd found in the Woods. Despite spending a few hours searching over the past two years, I'd not relocated them. But today my luck changed and I found the small group of four, with golden compound leaves in the general area I had remembered. Now photographed, by the box elder warped with galls, I am happy to know where they are again.

Privet death: seeing but not seeing

 Returned to the Woods Sunday, and I realized I had seen something weeks ago without really seeing it. The Woods seemed a little open and thin for late autumn. Then I noticed the Ligustrum privet. A bright fresh burst of green of new leaves about one or two feet high from the roots. The rest of the seven foot high stem was dead. Privet is one of, if not the, dominant invasive in the Woods. A European shrub, fairly innocuous as invasives go. In summer it provides creamy white flowers with nectar the European honey bees visit. It keeps most of its leaves in the winter. Thickets of privet provide some shelter on the coldest winter nights for birds and other animals from snow and freezing rain. The top 95% of most of the privet I was seeing was dead, most likely killed by the severe winter cold in February 2021.

  Privet competes with the native, natural Symphoricarpos indian currant or deer brush and other under story plants. Privet often wins, and excludes the native species that deer and other wildlife depend upon. The deer brush was less affected by the cold and is currently enjoying vigorous growth.

  It would be interesting to document the changes in the vegetation and condition of the Woods now, eight months after the deep freeze. What suppressed native species are now doing better? How does the insect population (pollinators/ herbivores/ predators) change?

  It is interesting to see the pattern of privet death vs survival. The cold air pooling, low places in the Woods have the highest percentage of dead privet. Raised portions of the forest, or places with good cold air drainage, have more of the live upper privet branches.