October 13, 2024: Anthocyanin

It sounds scary, but anthocyanin is what produces the red and crimson foliage that makes New Hampshire famous this time of year.  

Red Maples are the red champions of the autumn nature show.

Yellow and orange colors in leaves are present year-round but are only revealed in the fall when the leaves stop producing the chlorophyll that conceals their underlying colors. 

Photosynthesis ceases at the leaf tips first and works back towards the stem.

Trees with red leaves, however, actually create the pigment anthocyanin as they shut down photosynthesis in the fall.  They don't do it for our viewing pleasure or to extend the tourist season, but rather because the chemical helps protect plants against cold temperatures.

Black gum are less prevalent than maples but have even deeper red color in their leaves.

They use some of the sugars created over the summer to form this compound.  Anthocyanin is produced by a wide variety of plants with red, blue, and purple coloring including blueberries, tomatoes, red cabbage, beets, grapes, corn, even sweet potato.  It's one of several chemicals in the flavonoid family which are known to have antioxidant and anti-inflammatory benefits to humans.

Indian Cucumber has only a splash of anthocyanin.  The berries aren't edible, but the tubers are.

The color of these plants varies because anthocyanin changes color with pH level:  it is red in acidic conditions, purple in neutral, and yellow in alkaline conditions.  The chemical is thus useful in measuring pH levels - remember pH strips in high school chemistry?  Wikipedia provides lots of information on anthocyanin if you're interesed in learning more.

Jack-in-the-pulpit berries must be quite acidic.

Sumac is another red star this time of year.

Blueberry bushes are known to love acidic soil, and their leaves also turn dark red in the fall.

These were at 2400' elevation on the ledges up to Black Mountiain.

Black Mountain State Forest is in Haverhill and Benton, NH, and though the foliage there seemed past peak that far north on Friday, it was still pretty.

Thank you TB for the recommendation - it was a great hike!  

Around the Lakes Region, the maples are still at peak color.  I'll end with a few sights from around Lake Wicwas.

It's not too lake to take it all in!

October 6, 2024: Wildife in Action

Fall is progressing, most evident by the cooler temperatures and changing leaves.

North from the White Mountain Ledge on a perfect October day.

Wildlife is noting the changes too and their behavior is seen in many ways.  For some time now the songbirds have greatly reduced their singing.  Some have already left the Lakes Region, and much of the sounds of those remaining are the raucous alert calls of birds grouping up to drive off something they sense as a threat.  Chick-a-dees and Blue Jays are loud examples of this.  Sometimes I can determine what they're concerned about - crows, raptors, or even my presence in their house - but other times I have no idea.  I never realized just how acrobatic crows are until I saw a mob of them fighting over nesting rights on the cell tower atop Eastman Hill yesterday.

There were at least ten crows circling and dive bombing here.  The nest is in the center.

The Red Squirrels also get annoyed as I walk a trail through their home.

"Who's in my forest?!"

Beavers have resumed their daily cruises across the lake as they prepare for winter by searching out material for their homes, food for their winter pantries, and marking their territories to dissuade other beavers from entering their claimed domain.  Beavers' actions on land aren't easily observed as they work under the safety of the dark of night, so when I saw a scent mound being formed on the shoreline I set up a camera to see if I could catch the action.  Sure enough, that night the landowners stopped by.  

A big beaver at a small scent mound.

First, at 2:20 in the morning one beaver came by to check on and freshen its scent mound.  

Rubbing scent from its musk glands on the mound.

Then later a pair of friendly beavers were there, with at least one of them having an evening snack.  The camera took video of both moments:

As an added bonus, I got some daytime pictures of Gray Squirrels at the shoreline, including a couple that appeared to be getting a little frisky one morning.

It appears our three banded loons are still on the lake, and one of them is starting to lose its bright summer plumage, another sign of the season.

Breeding plumage is fading fast.

This is our south male as shown by the bands visible in the last photo.

The north male is still here as well and has been seen a few times fishing with another loon.  He hasn't started to change his appearance much.

Still looking dapper in his formal suit.

He's quite accomplished in his fishing skills.

Down he goes.

On one dive he came up with a keeper, way too big to swallow underwater which loons do with most of the fish they catch.

Yes, he's going to swallow that whole.

This big sunfish had to be worn out before swallowing so he wouldn't have a large fish thrashing around in his gullet:

There's a lot of activity to be seen as wildlife - as well as we humans - prepare for the change in season, some moving south for the winter and those that stay put preparing to survive the New England winter.  Trees have to stay here; deciduous trees prepare by storing in their roots the energy their leaves generated all summer and then letting the leaves go.  That process gives us the great fall foliage which should be just about at peak for the upcoming holiday weekend.

Here's hoping for good leaf-peeping weather over the coming week!

A foggy sunrise on this fine Sunday morning.