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Wednesday, January 28, 2009

Nurse Log

Or stump actually. New trees often find the rotting corpses of dead trees to be a rich source of nutrients. Forest litter gathers in the niches and crevices of rotting wood, constantly adding more to the stew of decay that nourishes trees.

In this case, young trees are growing out of the stumps of trees harvested 70 years ago, so they are remnant stumps, not logs. The wet temperate rain forest along the north Oregon coast helps the stumps to break down at an accelerated rate. In this case, western hemlock seedlings gained purchase and grew to adult trees suckling on the dead stumps.

The result is rather sculptural, and I dragged some heavy duty studio lights into the forest so I could highlight some of the more interesting visual
characteristics of the nurse logs.

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Here a western hemlock (Tsuga heterophylla) is balancing on the rotting stump of a douglas fir (Pseudotsuga menziesii)

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Below - A sitka spruce (Picea sitchensis) stump is surrounded by adult western hemlock trees, The roots still piercing the rotten wood of the stump.

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Decaying trees are mini ecosystems unto themselves, providing shelter and food for fungi, lichen, small mammals, birds and untold populations of invertebrates. Below, a biologist holds the large larva of a giant root borer (Prionus californicus), which burrows through soft wood of various trees.

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The stumps were photographed at property managed by the North Coast Land Conservancy not far from the Necanicum River on the northern Oregon Coast.

4 comments:

Camera Trap Codger said...

Super photos of a fascinating topic. There's so much in the woods to appreciate, but most people couldn't care less, and can't concentrate very well without their cell phones.

OregonWild said...

Chris, thanks for stopping by. And I agree - there are many beautiful things overlooked in our wilderness. It just takes a bit of time and open eyes.

Bpaul said...

Great photos, but I must say, it's the grub that will stick with me.

Holy moly.

dyana said...

Good photos....

Every one should read this ....
thanks for sharin with us......

________________
DyanaDevis

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Details About Me

Portland, Oregon, United States
Husband, Father, Student Of Natural History, Photographer