Data/hora: 10/06/2024 06:50:47

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
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.