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<h1>Exploring With Neotoma</h1>

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<h1>Neotoma Explorer</h1>

A map based explorer, search directly, or through URL

<img src="./images/explorer_window.png">

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<h1>Direct navigation</h1>

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<iframe width=100% src="https://www.youtube-nocookie.com/embed/8xTNtrdFeoI?rel=0" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

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<h1>Search for Data</h1>

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<li id="buttons">Basic Search</li>

<li id="buttons">Enter <em>Age Range</em></li>

<li id="buttons">Enter <em>Taxon</em></li>

<li id="buttons">Enter <em>Abundance</em></li>

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<strong>What state has the southernmost location of *Picea* in this search?</strong>

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<h1>Search for Sites</h1>

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<li>Use the Search dialog window

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<li><b>Advanced</b> tab</li>

<li><b>Metadata</b> subtab</li>

<li><b>Site Name</b> field</li>

<li>find "Devil's Lake, WI".</li>

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<li id="buttons">Once you've performed the search, click on the point that appears. A window will pop up with some information about this record.</li>

<summary>What is the latitude and longitude of Devil's Lake? What is the Site ID?</summary>

The lat/long is XXXX.

<h1>View Data</h1>

<ul id="buttons">

<li id="buttons">Find Devil's Lake (WI) again. Click on the site.</li>

<li id="buttons">In the popup window with metadata for Devil's Lake, note that the bottom includes a list of datasets available at the site.</li>

<li id="buttons">Hold the mouse over the pollen dataset.</li>

<li id="buttons">View the Devil's Lake pollen dataset.</li>

<li id="buttons">Samples: A data table. Each row is a different variable and each column is a stratigraphic depth.</li>

<li id="buttons">Diagram: Plots a stratigraphic diagram. Change the Primary Axis to 'COHMAP Chron 2' (this switches the vertical axis from a depth axis to time axis; more about depth vs. time later) then click 'Draw.'</li>

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<summary>What was the most abundant plant taxon at Devil's Lake during the end of the Pleistocene?</summary>

The most abundant taxon at Devil's Lake was <em>Picea</em>.

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<summary>What has been the most abundant taxon during the Holocene? (from 11,000 years ago to present)</summary>

*Note: Here we are assuming that plant with the most abundant pollen in sediments is also the most abundant on the landscape. This isn't necessarily a good assumption; we'll save that challenge for another day.*

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<details>

<summary>

Using the information in the Chronology tab, how many age controls are stored for Devil's Lake? How many of these are radiocarbon dates?

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This is the answer

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<details>

<summary>What publications are listed for Devil's Lake?</summary>

Here's the answer.

</details>

<section>

<h1>Find All Work by a PI</h1>

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<strong>In which states has Lou worked?</strong>

<h1>Find All Datasets by Type</h1>

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<p>The generation of fossil pollen records is labor intensive and hence expensive - *e.g.* the costs of fieldwork, the money spent on radiocarbon dates, the time required for a trained analysis to identify and count pollen data, etc. A rough time/cost estimate for a single fossil pollen record is on the order of two years and $30,000. Given this, give an order-of-magnitude estimate of the number of person-years and dollars it took to generate these fossil pollen records now stored in Neotoma. (Order-of-magnitude = 10 person-years? 100 person-years? 1000? etc.)</p>

<p>Notice there is a fairly dense network of fossil pollen sites in an arc stretching from Minnesota to Nova Scotia. Why might there be such a dense network in this region?</p>

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<h1>Show/Hide Search Results</h1>

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<h1>Download Data</h1>

<ul>

<li>In the popup window with metadata for Devil's Lake, hold the mouse over the pollen dataset. Note that an eyeball and '+' appear to the right. Click on the '+'. This adds the dataset to a 'Datasets' tray.

<li>Find the icon for the 'Saved Datasets Tray' and click on it.

<li>Hover over the dataset then click on the Save icon to the right. The dataset will be saved as a text file in CSV (comma separated value) format.

<li>Open the downloaded CSV file in Excel or a text editor (e.g. Notepad, Wordpad) to look at it.

It's this taxon.

<h1>Synthesizing With Neotoma</h1>

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<h1>Multi-Taxon Search</h1>

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1. Find all sites with at least 20% *Picea* pollen between 15,000 and 12,000 years ago.

2. Find all sites with Mammut (mastodon) between 15,000 and 12,000 years ago.

1. For Mammut, use the 'Advanced Taxon Selection' which you can use by clicking on the gears icon to the right of the 'Taxon' field in the 'Search' window.

2. In the ATS window, choose 'Mammals' for Taxa Group and then enter Mammut into the 'Search for' window. Then click 'Go'

3. Note that the search returned taxon names for both Mammut (mastodon) and Mammuthus (mammoth). Click all boxes for all variants of Mammut but do not click the Mammuthus boxes

4. Enter a search name (e.g. 'Mammut - all') and click Save

5. In the general search window, click 'Search'

* **QUESTION 6** Does mastodon tend to live in places with spruce, or without spruce? Suggest two hypotheses that might explain the observed association.

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<h1>Multi-Time Search</h1>

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* **QUESTION 7** Describe the history of *Picea* distributions in eastern North America over the last 21,000 years (i.e. ignore the Rockies and points west). What environmental change(s) might be causing this shift in *Picea* distributions? Given that trees are sessile (immobile) organisms, what processes might allow the observed range shifts?