Species trait diversity sustains multiple dietary nutrients supplied by freshwater fisheries.
Nature's contributions to people
biodiversity loss
biodiversity-ecosystem function
ecological stoichiometry
functional traits
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Nov 2023
Nov 2023
Historique:
revised:
21
08
2023
received:
27
10
2022
accepted:
23
08
2023
medline:
1
11
2023
pubmed:
6
9
2023
entrez:
6
9
2023
Statut:
ppublish
Résumé
Species, through their traits, influence how ecosystems simultaneously sustain multiple functions. However, it is unclear how trait diversity sustains the multiple contributions biodiversity makes to people. Freshwater fisheries nourish hundreds of millions of people globally, but overharvesting and river fragmentation are increasingly affecting catches. We analyse how loss of nutritional trait diversity in consumed fish portfolios affects the simultaneous provisioning of six essential dietary nutrients using household data from the Amazon and Tonlé Sap, two of Earth's most productive and diverse freshwater fisheries. We find that fish portfolios with high trait diversity meet higher thresholds of required daily intakes for a greater variety of nutrients with less fish biomass. This beneficial biodiversity effect is driven by low redundancy in species nutrient content profiles. Our findings imply that sustaining the dietary contributions fish make to people given declining biodiversity could require more biomass and ultimately exacerbate fishing pressure in already-stressed ecosystems.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1887-1897Informations de copyright
© 2023 John Wiley & Sons Ltd.
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