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- Q: How did you derive the molecular time
estimates?
- The molecular time estimates were obtained
from scientific literature.
- Q: How do you calculate the summary times?
- Summary time estimates are calculated using
a simple average and a weighted average based
on the number of genes analyzed. The weighted
average for each data type is calculated in
addition to the overall weighted average.
- Q: What search method is employed to locate
molecular time estimates for a pair of taxa?
- When a valid pair of taxa is submitted through
the search page, the TimeTree Database determines
the most inclusive taxonomic groups for each
query taxa. Such groups are one level lower
in the taxonomic classification than the common
taxon that includes both query taxa. Once these
groups are determined, the TimeTree Database
obtains all molecular time estimates in which
a member of the most inclusive group for Taxon
A is compared to a member of the most inclusive
group for Taxon B.
- Q: How do I cite the TimeTree database?
-
Hedges SB, Dudley J, & Kumar S (2006). TimeTree: A public knowledge-base. ( www.timetree.net). Pennsylvania and Arizona State Universities, USA.
- Q: Can I download the TimeTree Database data
on to my computer?
- The TimeTree Database data is currently
not available for download. Methods for making
these data available in the future are currently
under discussion.
- Q: I found an error on the TimeTree website.
How can I report it?
- Errors and suggestions can be submitted
to
- Q: Can I get a list of the literature referenced
by the TimeTree Database?
- Yes, please click here to
view a complete list of references.
- Q: How often is the TimeTree Database updated?
- The TimeTree Database is continually updated.
When new molecular time estimates become available
in the literature they are added to the TimeTree
Database shortly after their publication.
- Q: Can I submit my own, unpublished, molecular time estimate
to the TimeTree Database?
- The TimeTree Database currently relies solely
on published data and is not presently accepting
unpublished time estimates.
- Q: What software was used to create the TimeTree
Database and Website?
- The TimeTree Database was developed using
the PostgreSQL database
server. The web interface was developed with PHP.
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