↓ Skip to main content

PNAS

Article Metrics

Increasing homogeneity in global food supplies and the implications for food security

Overview of attention for article published in Proceedings of the National Academy of Sciences of the United States of America, March 2014
Altmetric Badge

About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (99th percentile)
  • High Attention Score compared to outputs of the same age and source (99th percentile)

Citations

dimensions_citation
369 Dimensions

Readers on

mendeley
1075 Mendeley
citeulike
2 CiteULike
Title
Increasing homogeneity in global food supplies and the implications for food security
Published in
Proceedings of the National Academy of Sciences of the United States of America, March 2014
DOI 10.1073/pnas.1313490111
Pubmed ID
Authors

C. K. Khoury, A. D. Bjorkman, H. Dempewolf, J. Ramirez-Villegas, L. Guarino, A. Jarvis, L. H. Rieseberg, P. C. Struik

Abstract

The narrowing of diversity in crop species contributing to the world's food supplies has been considered a potential threat to food security. However, changes in this diversity have not been quantified globally. We assess trends over the past 50 y in the richness, abundance, and composition of crop species in national food supplies worldwide. Over this period, national per capita food supplies expanded in total quantities of food calories, protein, fat, and weight, with increased proportions of those quantities sourcing from energy-dense foods. At the same time the number of measured crop commodities contributing to national food supplies increased, the relative contribution of these commodities within these supplies became more even, and the dominance of the most significant commodities decreased. As a consequence, national food supplies worldwide became more similar in composition, correlated particularly with an increased supply of a number of globally important cereal and oil crops, and a decline of other cereal, oil, and starchy root species. The increase in homogeneity worldwide portends the establishment of a global standard food supply, which is relatively species-rich in regard to measured crops at the national level, but species-poor globally. These changes in food supplies heighten interdependence among countries in regard to availability and access to these food sources and the genetic resources supporting their production, and give further urgency to nutrition development priorities aimed at bolstering food security.

Twitter Demographics

The data shown below were collected from the profiles of 287 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 1,075 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 17 2%
Colombia 6 <1%
Germany 6 <1%
United Kingdom 6 <1%
Italy 5 <1%
Sweden 4 <1%
Netherlands 4 <1%
Switzerland 4 <1%
Brazil 4 <1%
Other 34 3%
Unknown 985 92%

Demographic breakdown

Readers by professional status Count As %
Researcher 263 24%
Student > Ph. D. Student 200 19%
Student > Master 168 16%
Student > Bachelor 94 9%
Other 61 6%
Other 198 18%
Unknown 91 8%
Readers by discipline Count As %
Agricultural and Biological Sciences 412 38%
Environmental Science 189 18%
Social Sciences 89 8%
Economics, Econometrics and Finance 46 4%
Earth and Planetary Sciences 35 3%
Other 155 14%
Unknown 149 14%

Attention Score in Context

This research output has an Altmetric Attention Score of 721. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 01 September 2020.
All research outputs
#11,911
of 15,881,303 outputs
Outputs from Proceedings of the National Academy of Sciences of the United States of America
#422
of 86,102 outputs
Outputs of similar age
#112
of 190,670 outputs
Outputs of similar age from Proceedings of the National Academy of Sciences of the United States of America
#5
of 998 outputs
Altmetric has tracked 15,881,303 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 86,102 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 28.6. This one has done particularly well, scoring higher than 99% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 190,670 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 998 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 99% of its contemporaries.