Tag-Archive for » trees «

March 16th, 2010 | Author: sarcozona

A few weeks ago, a friend told me he was coming over with a book that I absolutely had to read.  He showed up a few minutes later and launched immediately into a rapturous description of The Wild Trees. He wouldn’t even visit very long so that I could start reading right away.   I didn’t start reading right away and that’s a good thing – I had a test the next day and once I started reading, I couldn’t stop.

From the Institute for Redwood Ecology

The Wild Trees is about redwood research and the people that pioneered the field.  Until very recently, we had no idea what was up there and a lot of it is still a mystery.

I love popular science books, but I usually find them simply intellectually exciting and rarely get emotionally involved.  This book was different for a few reasons.  First of all, the scientists are portrayed as humans and the way their personal lives influence their professional lives (and vice versa) is a large part of the book.  So often scientists are portrayed as dull or unnaturally obsessed, but this book shows how very human we are – from the connections we have with our families, to breakups and sex, to the awe and wonder we feel when presented with something so incredible as a redwood.

And that’s the second reason this book is so different from the normal nonfiction I read: a lot of time was spent describing the trees, the forest, and the experience of climbing the trees so that their magnificence and beauty really came through.  By the end of the book, I was ready to sign up for a tree climbing class just so I could see for myself what was up there.

It was also kind of thrilling to have a sort of connection to these trees.  I work with a scientist who studies redwoods and he has cores from many of these trees.  To get a core, you use a special hollow drill to extract a bit of wood the size of a very, very long straw from a tree.  You can sand the straw flat to see the growth rings:

Redwood rings under a microscope

I don’t study redwoods now, but I learned all about dendrochronology, or tree ring science, with redwoods.  Tree rings are a fascinating archive of stress, climate, competition, and more – an autobiography of a tree, if you will.  The language may be hard to interpret, but the information is there.

Every tree that is cored is given a name and most of the time the names are dull (SP032, for example).  But redwoods are given names like Thor, Atlas, and Kronos.  I always gave the tree a personality I associated with that name as I counted and counted and counted (and counted and counted) the rings.  The Wild Trees describes the discovery of many of the trees whose cores I analyzed and what it was like to climb them, what fascinating communities live within their canopies, even human drama that occurred in their branches.  I feel honored and grateful to have learned to read the stories trees tell from such ancient and stately behemoths.

December 31st, 2009 | Author: sarcozona

Scientists are masters of understatement:

Findings of relatively slow tree migration rates in response to historical changes in climate (potentially < 100 m per year) are unfortunate in light of model predictions of how fast tree species will need to migrate to track current climates under climate change scenarios.*

Dead Conifers on West Mesa after Cedar Fire (May, 2004)                          Photo by Heather Karnes-Schmalbach

Dead Conifers on West Mesa after Cedar Fire (May, 2004) Photo by Heather Karnes-Schmalbach

Dead trees in Thornham, Norfolk

Dead trees in Thornham, Norfolk

Aerial view of the once lush forests of the  Kenai Peninsula, Alaska.

Aerial view of the once lush forests of the Kenai Peninsula, Alaska.

Dead trees show the beetles' paths through an otherwise healthy forest. (USDA Forestry Service)

Dead trees show the beetles' paths through an otherwise healthy forest. (USDA Forestry Service)

Peter Essick/Getty Images

Peter Essick/Getty Images

Dead ponderosa

Dead ponderosa

*Aitken, S N, S Yeaman, J A Holliday, T Wang, and S Curtis-McLane. “Adaptation, Migration or Extirpation: Climate Change Outcomes for Tree Populations.” Evolutionary Applications 1, no. 1 (2008): doi:10.1111/j.1752-4571.2007.00013.x.

February 11th, 2009 | Author: sarcozona

This is old news, but if you haven’t checked out the latest edition of Berry Go Round at Watching the World Wake Up, go!  My favorite entry this month was about the oldest tree on earth.

I’ll be hosting the next edition of the carnival in a few weeks, so email your submissions to enchantressofnumbers (at) gmail.

July 03rd, 2008 | Author: sarcozona

I’m too busy to write anything substantial, so I’m just linking to another carnival today.  Festival of the Trees is longer than the latest Berry Go Round, but obviously not as good since it doesn’t include me!  FotT links to the 12 most magnificent trees in the world.  That made me think of the sycamore that I used to love to climb when I was growing up.  Maybe it doesn’t qualify as magnificent, but it was certainly well loved.

June 01st, 2008 | Author: sarcozona

There’s a new edition of Festival of the Trees up at Wrenaissance Reflections.  Go read it!

The best bits:

May 02nd, 2008 | Author: sarcozona

The 23rd edition of Festival of the Trees is up at 10,000 Birds. Of course, you also think trees are almost the best part of the world we live in and will go read every entry. Just in case you don’t, though, the best bits are right here:

From the intro this post on magnolias got, I was expecting much larger trees!  This author has obviously never visited the southern US.

The world’s oldest known tree – a spruce almost 10,000 years old.

Good tree planting advice:

1. Plant trees where trees belong.

2. Plant trees that belong where you’re planting them.

Morphology of baby leaves.

Tree roots are bizarre.

March 06th, 2008 | Author: sarcozona

ResearchBlogging.orgNothofagus dombeyi, or coihue, is a large tree that grows in the Andes. In the late 90s, northern Patagonia was hit with a pretty severe drought that killed many of these trees. So what was the difference between the trees that kicked it and the trees that are still going strong?

Some trees constantly live with higher water stress than others. This is usually due to where they’re growing. If a tree is on a particularly steep patch of ground, the water runs off before it can suck it up. If a tree is growing in shallow soil or on a very sunny slope, it’s going to be a lot thirstier than your average tree in the forest.

The authors of this study thought that these trees might be the ones to be hit hardest during the drought since they were already stressed. They also considered the possibility that the trees growing in more water stressed areas are different and better able to cope with drought. The trees used to the good life might have invested more in their tops than their roots, which could be bad news in a drought. A tree with a smaller root system might not be able to suck up enough water to support all its branches in a very dry year.

The authors also wondered if there were a way to look at a tree and use where and how its growing to predict whether or not it will survive a drought.

So, what did they find?

more…

June 15th, 2007 | Author: sarcozona

Means more food (for trees!)

The climate is getting warmer and winter is coming later. This means fungi have more time to grow. And fungi make tree food!

Fungi play a key role in forest ecosystems, breaking down leaf litter and returning nutrients to trees via their roots. The expanded fruiting season implies a major increase in nutrients available to trees and thus increased tree growth.