A paper by Jessica Blois, Jack Williams, and co-authors is now available online early at Ecography (link). This paper paired fossil pollen assemblages across eastern North America from the Neotoma database with paleoclimatic simulations to model the climatic drivers of fossil pollen dissimilarity across space over the past 21,000 years. We found that the set of climate variables associated with dissimilarity between fossil pollen assemblages across eastern North America changed over the past 21,000 years. Higher magnitudes of climate change between time periods meant lower prediction strength when projecting spatial models of community dissimilarity to different time periods.
Posted by Jessica Blois on 10/29
TaxaMapper is a web application that enables you to map occurrences of taxa from the Neotoma database at different time periods. Create multiple layers of taxon versus time, combine them into new layers with AND/OR operations, and customize layer symbology to visually analyze spatiotemporal patterns. Additional features coming soon include search wildcards (e.g. Bison*) and minimum pollen abundance thresholds.
Posted by Brian Bills on 09/05
Several of us (Eric, Jessica, Brian and myself) contributed to a general article on databases in veretbrate paleontology which has been submitted to the Journal of Vertebrate Paleontology for publication. Our contribution featured FAUNMAP and Neotoma.
Posted by Russ Graham on 05/10
The revised age models for late Quaternary pollen sites in eastern North America are now available! A zip file containing the age models and additional information can be downloaded in the 'Documents' section of the Neotoma website. If you have any questions or feedback, please contact Jessica Blois or Jack Williams.
Posted by Jessica Blois on 02/15
The new pending data repository provides access to data that have been sent to Neotoma but not yet incorporated into its relational database. Files here include new author submissions awaiting processing by Neotoma data stewards as well as miscellaneous datasets that do not yet fit into the Neotoma database structure. The repository provides search and sortable browsing of datasets via their basic metadata.
Posted by Brian Bills on 10/06
The Neotoma Explorer web application has been updated and now features interactive stratigraphic diagramming. When viewing a pollen dataset, select the "Diagram" tab to try out the new tool. Users may customize the y-axis, taxa grouping, and 5x exaggeration options. Also, mousing over the plot lines will display the underlying abundance data values.
Posted by Brian Bills on 07/18
A paper by Jessica Blois, Jack Williams, Eric Grimm, Steve Jackson, and Russ Graham has just been published in Quaternary Science Reviews. This paper uses the Neotoma database to assess the amount of temporal uncertainty in late Quaternary pollen cores from eastern North America. The authors then identify particularly well-dated and well-sampled sites ('benchmark' sites), and use them to update the age-models of nearby, non-benchmark sites. Read the paper here (subscription required) or e-mail Jessica Blois for a reprint.
Posted by Jessica Blois on 07/12
The Taxonomic Name Resolution Service (TNRS) is a new web application for checking spelling errors and currently accepted taxonomic plant names. It uses a fuzzy matching algorithm to find misspelled names. Lists of up to 5000 names can be submitted at a time by pasting the names into an online form. The website is here: Taxonomic Name Resolution Service
Read a recent article about TNRS in Nature.
Posted by Blake Ketchum on 06/20