Posts tagged “digital data

You don’t want to build a new tree from scratch?

‘Let the computer do the work’

Creating a phylogenetic tree is no easy task. It usually involves a complex synthesis of multiple datasets, but it leads to much satisfaction when all work is done—until new data come in.

Then, the process typically starts all over again: building a new tree from scratch.

Mark Holder, a professor of statistical phylogenetics at Kansas University and one of the investigators of the Open Tree of Life project, maintains that there is a real need for scientists to have access to digital tools that save them from doing quite a few labor-intensive procedures.

“In the past, researchers combined information from different trees and then analyzed the data. But they never made good computer systems that allowed for continuous updating. They would not be able to see how an entire tree would look like when they added more data or another individual tree. In that case, they had to start over.”

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Puzzling:

Connecting millions of pieces

Creating the entire tree of life is like completing a jigsaw puzzle with more than two million pieces. And to make it even harder; the illustration of how the solved puzzle would look like is missing.

No one knows precisely how all pieces are related.

This disparity is unmistakably demonstrated by disagreements between evolutionary biologists about how certain species and branches are linked together. Throughout the years they have created a large variety of trees with specific groups of species that contradict each other. For example, one researcher maintains that species A is the closest living relative of species B, but another scientist thinks that species C is actually most closely related to B. (more…)


Help!

Wanted: All your favorite trees

With eleven investigators, the Open Tree of Life project is already a large-scale research endeavor. But that does not mean that they can add all 1.9 million known species to a database by themselves. In fact, they are looking for help.

A lot of help.

The main goal of the project is to merge all existing phylogenetic trees in one overarching tree of life. In the past few months, the researchers have been working on software applications to make it possible to store all known species and, more important, to specify how they are all linked to each other in evolutionary terms.

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