7 research outputs found
Data output for: Climate change stimulated agricultural innovation and exchange across Asia, in review.
<p>The GitHub repository for this project does not contain the output<br>
generated by the script—3.2 GB of compressed data. All output data is<br>
available as this Zenodo archive.</p>
<p>The `vignettes/` directory contains all data generated by the<br>
`guedesbocinsky2018.Rmd` RMarkdown vignette:</p>
<p>Â - `data/raw_data` contains data downloaded from web sources for this<br>
  analysis<br>
 - `data/derived_data/` contains tables of the raw site chronometric<br>
  data without locational information, and the modeled chronometric<br>
  probability and niche information for each site.<br>
 - `data/derived_data/models/` contains R data objects describing the<br>
  Kriging interpolation models across the study area<br>
 - `data/derived_data/recons/` contains NetCDF format raster bricks of<br>
  the model output (i.e., the reconstructed crop niches)<br>
 - `figures/` contains all figures output by the script, including<br>
  videos of how each crop niche changes over time<br>
 - `figures/site_densities/` contains figures of the estimated<br>
  chronometric probability density for each site in our database<br>
 - `submission/` contains all of the figures, tables, movies, and<br>
  supplemental datasets included with d’Alpoim Guedes and Bocinsky<br>
  (2018)</p
The Impact of Climate on the Spread of Rice to North-Eastern China: A New Look at the Data from Shandong Province
<div><p>Moving crops outside of their original centers of domestication was sometimes a challenging process. Because of its substantial heat requirements, moving rice agriculture outside of its homelands of domestication was not an easy process for farmers in the past. Using crop niche models, we examine the constraints faced by ancient farmers and foragers as they moved rice to its most northerly extent in Ancient China: Shandong province. Contrary to previous arguments, we find that during the climatic optimum rice could have been grown in the region. Climatic cooling following this date had a clear impact on the distribution of rice, one that may have placed adaptive pressure on rice to develop a temperate phenotype. Following the development of this temperate phenotype, rice agriculture could once again become implanted in select areas of north-eastern China.</p></div
The coefficient of variation in the distribution of growing degree-days across Shandong.
<p>Map relief from ETOPO1 [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130430#pone.0130430.ref006" target="_blank">6</a>]; country and province outlines from Natural Earth (naturalearthdata.com).</p
The thermal niche of temperate and tropical <i>O. japonica</i> at a series of different temperature perturbations.
<p>The area in red represents the area in which tropical <i>O. japonica</i> can be grown. The area in white represents the area in which temperate <i>O. japonica</i> can be grown. Sites represented by black dots are sites where only millet has been recovered from the assemblage. Sites with a black square represent sites where rice has been unearthed in contexts dating to 6000–5000 cal. BC. Sites with an open circle are sites where rice has been unearthed between 5000–3000 cal. BC, however come from poor or undated contexts. Sites with a black triangle represent finds of rice that date between 2600–2000 cal. BC. Sites with a diamond represents sites where rice has been found that post-dates 1800 cal. BC. Map relief from ETOPO1 [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130430#pone.0130430.ref006" target="_blank">6</a>]; country and province outlines from Natural Earth (naturalearthdata.com).</p
The thermal niche of foxtail millet.
<p>At all temperature perturbations it is possible to practice foxtail millet within the area of Shandong. The area in red represents the area in which foxtail can be grown with certainty. The area in white represents the area in cooler adapted varieties of foxtail millet can be grown. Sites represented by black dots are sites where only millet has been recovered from the assemblage. Sites with a black square represent sites where rice has been unearthed in contexts dating to 6000–5000 cal. BC. Sites with an open circle are sites where rice has been unearthed between 5000–3000 cal. BC, however come from poor or undated contexts. Sites with a black triangle represent finds of rice that date between 2600–2000 cal. BC. Sites with a diamond represents sites where rice has been found that post-dates 1800 cal. BC. Map relief from ETOPO1 [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130430#pone.0130430.ref006" target="_blank">6</a>]; country and province outlines from Natural Earth (naturalearthdata.com).</p
The northern hemisphere temperature anomaly and presence of rice in Shandong during the Holocene.
<p>Temperature anomaly (black line) and confidence intervals (orange band) are as reported by Marcott [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130430#pone.0130430.ref023" target="_blank">23</a>]. Gray regions indicate periods of probable rice cultivation in Shandong.</p