Data/hora: 01/06/2024 11:39:22

Provedor de dados: | 5
País: | France
Título: | Eating up the world's food web and the human trophic level
Autores: | Bonhommeau, Sylvain; Dubroca, Laurent; Le Pape, Olivier; Barde, Julien; Kaplan, David; Chassot, Emmanuel; Nieblas, Anne-elise.
Data: | 2013-12
Ano: | 2013
Palavras-chave: | Human ecology; Nutrition transition; Trophic ecology.
Resumo: | Trophic levels are critical for synthesizing species' diets, depicting energy pathways, understanding food web dynamics and ecosystem functioning, and monitoring ecosystem health. Specifically, trophic levels describe the position of species in a food web, from primary producers to apex predators (range, 1-5). Small differences in trophic level can reflect large differences in diet. Although trophic levels are among the most basic information collected for animals in ecosystems, a human trophic level (HTL) has never been defined. Here, we find a global HTL of 2.21, i.e., the trophic level of anchoveta. This value has increased with time, consistent with the global trend toward diets higher in meat. National HTLs ranging between 2.04 and 2.57 reflect a broad diversity of diet, although cluster analysis of countries with similar dietary trends reveals only five major groups. We find significant links between socio-economic and environmental indicators and global dietary trends. We demonstrate that the HTL is a synthetic index to monitor human diets and provides a baseline to compare diets between countries.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00171/28190/26609.pdf

DOI:10.1073/pnas.1305827110

Editor: | Natl Acad Sciences
Relação: | http://archimer.ifremer.fr/doc/00171/28190/
Formato: | application/pdf
Fonte: | Proceedings Of The National Academy Of Sciences Of The United States Of America (0027-8424) (Natl Acad Sciences), 2013-12 , Vol. 110 , N. 51 , P. 20617-20620
Fonte: | 2014 National Academy of Sciences.