impressions

This was one of those weeks that can only be described as a gift. The little coastal town I live near doesn’t get anything most people can call winter, but it gets cold enough. Even some snow and ice some years, just not this year. Not yet, anyway.

But apparently winter gave a reprieve to some areas this past week, here too. Days were 60s-70s and nights did not get much below 45. So electric bills will be lower. Abundant sun, expansive blue skies, wispy playful contrails and clouds decorating the air.

IMG_0870.JPGCape Fear, upriver

Mindful of Emily Dickinson’s lovely poem, “There’s a Certain Slant of Light” (…Winter afternoons–…)

IMG_0866.JPGRed oak clinging to what is left of autumn

IMG_0867.JPGa closer look at leaf veins with the sun behind the tree trunk

So according to askabiologist.com* the leaves turn when temperatures get colder and the tree starts “breaking down the chlorophyll into smaller particles”, leaving more room for other colors (carotenoids) to make the orange, reds and yellows. Other trees (maples) have anthocyanins that create red, pink and purple colors.

The theory I grew up believing was that leaf colors changed when the days got shorter and there was less sunlight to make green. So that always seemed plausible but days get shorter all over the world and leaves don’t change color in warmer climates. So the cold theory makes more sense now.

I just never thought about it.

It’s interesting when we accept ideas unquestioning. Especially when they are about non-personal things, like nature. Facts are applicable to everything but so much seems subjective. So my ideas about why leaves change color, that I have believed for years (evidently I didn’t pay close attention in botany class) has been corrected.

It makes me wonder how many ideas, theories, concepts I am still holding true without really having it right.

0.jpgPileated woodpecker, base of far left tree hunting insects

Rescue dogs Lily and Lulu always get things right. And they are generous in their opinions, whenever I am at a loss.

IMG_0002.JPG

 

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https://askabiologist.asu.edu/questions/why-do-leaves-change-color

13 thoughts on “impressions

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