Tag Archives: niobrara

Photo of the Week – July 28, 2016

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Those of you who have followed this blog for a while know about the big wildfire that swept across The Nature Conservancy’s Niobrara Valley Preserve back in 2012.  One of the results of that fire was the death of almost all of the Preserve’s ponderosa pines on the bluffs north of the river.  I’ve posted several times about the recovery of that portion of the site, which we are watching closely and learning from.  We haven’t seen any new pines coming in yet, but grasses, sedges, wildflowers, and deciduous shrubs are all flourishing.

Bark beetle galleries beneath the bark of a pine killed in the 2012 wildfire. The Nature Conservancy's Niobrara Valley Preserve.

Bark beetle galleries beneath the bark of a pine killed in the 2012 wildfire. The Nature Conservancy’s Niobrara Valley Preserve.

As new plants colonize the site, the old skeletons of pines and eastern red cedars are starting to break down.  Some of those dead trees are tipping over completely, while others are breaking off further up the trunk.  The result is a landscape that is a little more difficult to walk through (and dangerous on windy days), but one that is still very pretty.  The gradual degradation of the tree skeletons is a necessary part of the recovery and transition of this area to a different ecological community.  We think that pines will eventually recolonize the site, but it’s going to be many years before that happens to any great extent.  In the meantime, there is a great abundance of wildlife, insects, and wildflowers living between the falling trees.

While up at the Niobrara Valley Preserve earlier this summer, I spent a little time wandering in, ruminating about, and photographing the area where the old trees are breaking down.  Here is some of what I saw.

More and more pines are breaking off at the base and falling.

More and more pines are breaking off at the base and falling.

Some trees are falling, but many others are just losing their tops, creating a more ragged look to ridge tops.

Some trees are falling, but many others are just losing their tops, creating a more ragged look to ridge tops.

Despite the fact that the trees are dead, I still find them aesthetically pleasing, including as foreground for sunset light.

Despite the fact that the trees are dead, I still find them aesthetically pleasing, including as foreground for sunset light.

I’ve always enjoyed looking at the patterns I find in ponderosa pine park.  It’s hard to resist photographing them.  This last trip, I was seeing specific images in some of the patterns, so I photographed a few and present them here for your consideration.  They are a kind of Rorschach test, I suppose.  What images do you see?

Bark Pattern A - what do YOU see in it?

Bark Pattern A – what do YOU see in it?

Bark Pattern B. Lots to see in this one...

Bark Pattern B. Lots to see in this one…

A Crappy Job But Somebody’s Got To Do It

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Oh man, there are so many choices for titles when writing a blog post about dung beetles…

While my wife and I were hiking around the Niobrara Valley Preserve a few weeks ago, Kim spotted a couple dung beetles rolling a ball of bison dung through the Sandhills.  It was really fun to watch them and it was my first good opportunity to photograph dung beetles in action.  The light was nice and the beetles seemed fine with me watching them.  As it happened, once I started following the first pair with my camera, I ended up seeing two other pairs of beetles within a few yards of the first.  I wish I’d had the time to follow them longer and see where they went with their booty.

Dung beetles with bison dung at the Niobrara Valley Preserve, Nebraska.

Dung beetles with bison dung at the Niobrara Valley Preserve, Nebraska.

Dung beetles don’t often get a lot of attention, but when they do, it’s the “rollers” that usually get it.  In fact, there are three general categories of dung beetles: rollers, dwellers and tunnelers.  Dwellers just live inside manure piles (ick).  Tunnelers burrow beneath manure piles and bury some of it for their larvae to feed on (boring).  But ROLLERS!!  Rollers make a neat round ball out of manure and roll that ball across the ground for our enjoyment.  (Oh, and also so they can find just the right place to bury it and lay eggs with it.)

Essentially, rollers, dwellers, and tunnelers are all doing the same job: they feed on manure and help break it down and return it to the soil.  Clearly, however, dung beetles that roll poop balls across the ground do that job in the most entertaining way!

The strength and agility of these beetles was pretty amazing to watch. They moved their ball over and through grass litter and other obstacles without too much trouble. It was particularly impressive since only one beetle seemed to be doing the work while the other just rode along on the ball (maybe providing counterbalance?).

The strength and agility of these beetles was pretty amazing to watch. They moved their ball over and through grass litter and other obstacles without too much trouble. It was particularly impressive since the ball had to weigh many times more than the beetles and only one beetle seemed to be doing the work while the other just rode along on the ball.  I couldn’t tell if the beetle on the ball was providing counterbalance to help get over obstacles or if it was just along for the ride.

To be serious for a moment, there are apparently 50 or so species of dung beetles here in Nebraska, and they really do play a really important role in converting manure into productive soil.  Strong populations of dung beetles can also break down manure piles before parasites on cattle and bison can lay their eggs in them – helping to control those parasite populations.  Ironically, chemical treatments used to reduce parasite loads in livestock can be hard on dung beetle populations because the pesticides remain in the manure.  Even more ironically, some  people are now advocating the introduction of dung beetles from other continents to bolster declining populations of beetles in U.S. pastures.  Humans sure are silly sometimes.

On the other hand, we don’t roll big balls of poop around…