Invited review: A position on the Global Livestock Environmental Assessment Model (GLEAM)

M.J. MacLeod, T. Vellinga, C. Opio, A. Falcucci, G. Tempio, B. Henderson, H. Makkar, A. Mottet, T. Robinson, H. Steinfeld, P.J. Gerber

Research output: Contribution to journalReview articleAcademicpeer-review

6 Citations (Scopus)

Abstract

The livestock sector is one of the fastest growing subsectors of the agricultural economy and, while it makes a major contribution to global food supply and economic development, it also consumes significant amounts of natural resources and alters the environment. In order to improve our understanding of the global environmental impact of livestock supply chains, the Food and Agriculture Organization of the United Nations has developed the Global Livestock Environmental Assessment Model (GLEAM). The purpose of this paper is to provide a review of GLEAM. Specifically, it explains the model architecture, methods and functionality, that is the types of analysis that the model can perform. The model focuses primarily on the quantification of greenhouse gases emissions arising from the production of the 11 main livestock commodities. The model inputs and outputs are managed and produced as raster data sets, with spatial resolution of 0.05 decimal degrees. The Global Livestock Environmental Assessment Model v1.0 consists of five distinct modules: (a) the Herd Module; (b) the Manure Module; (c) the Feed Module; (d) the System Module; (e) the Allocation Module. In terms of the modelling approach, GLEAM has several advantages. For example spatial information on livestock distributions and crops yields enables rations to be derived that reflect the local availability of feed resources in developing countries. The Global Livestock Environmental Assessment Model also contains a herd model that enables livestock statistics to be disaggregated and variation in livestock performance and management to be captured. Priorities for future development of GLEAM include: improving data quality and the methods used to perform emissions calculations; extending the scope of the model to include selected additional environmental impacts and to enable predictive modelling; and improving the utility of GLEAM output.
LanguageEnglish
Pages383-397
JournalAnimal
Volume12
Issue number2
DOIs
Publication statusPublished - 1 Feb 2018

Fingerprint

environmental assessment
livestock
environmental impact
raster data
herds
Food and Agriculture Organization
United Nations
supply chain
greenhouse gas emissions
economic development
products and commodities
natural resources
developing countries
crop yield

Keywords

  • climate change
  • environmental assessment
  • life-cycle analysis
  • livestock
  • models

Cite this

MacLeod, M.J. ; Vellinga, T. ; Opio, C. ; Falcucci, A. ; Tempio, G. ; Henderson, B. ; Makkar, H. ; Mottet, A. ; Robinson, T. ; Steinfeld, H. ; Gerber, P.J. / Invited review: A position on the Global Livestock Environmental Assessment Model (GLEAM). In: Animal. 2018 ; Vol. 12, No. 2. pp. 383-397.
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MacLeod, MJ, Vellinga, T, Opio, C, Falcucci, A, Tempio, G, Henderson, B, Makkar, H, Mottet, A, Robinson, T, Steinfeld, H & Gerber, PJ 2018, 'Invited review: A position on the Global Livestock Environmental Assessment Model (GLEAM)', Animal, vol. 12, no. 2, pp. 383-397. https://doi.org/10.1017/S1751731117001847

Invited review: A position on the Global Livestock Environmental Assessment Model (GLEAM). / MacLeod, M.J.; Vellinga, T.; Opio, C.; Falcucci, A.; Tempio, G.; Henderson, B.; Makkar, H.; Mottet, A.; Robinson, T.; Steinfeld, H.; Gerber, P.J.

In: Animal, Vol. 12, No. 2, 01.02.2018, p. 383-397.

Research output: Contribution to journalReview articleAcademicpeer-review

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AU - MacLeod, M.J.

AU - Vellinga, T.

AU - Opio, C.

AU - Falcucci, A.

AU - Tempio, G.

AU - Henderson, B.

AU - Makkar, H.

AU - Mottet, A.

AU - Robinson, T.

AU - Steinfeld, H.

AU - Gerber, P.J.

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KW - environmental assessment

KW - life-cycle analysis

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