The strength of ecological subsidies across ecosystems: a latitudinal gradient of direct and indirect impacts on food webs.
Allochthonous
apparent interactions
latitude
macroecology
meta-analysis
meta-ecosystem
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Feb 2019
Feb 2019
Historique:
received:
13
09
2018
revised:
06
10
2018
accepted:
23
10
2018
pubmed:
15
12
2018
medline:
8
8
2019
entrez:
15
12
2018
Statut:
ppublish
Résumé
Material and energy flows among ecosystems can directly and indirectly drive ecosystem functions. Yet, how populations of consumers respond to allochthonous inputs at a macroecological scale is still unclear. Using a meta-analysis spanning several biomes, we show that the abundance of recipient populations is 36-57% larger with increased allochthonous inputs. The strength of direct effects on the recipients of these inputs as well as the indirect effects on the consumers of these recipients (i.e. ascending indirect effects) are constant across a latitudinal gradient spanning subtropical, arid, temperate, boreal and arctic ecosystems. However, indirect effect on the in situ resources of the input recipient (i.e. descending indirect effects) decreases with latitude. Our results suggest that the influence of allochthonous inputs can vary across large-scale gradients of ecosystem productivity and may be driven by the types of trophic interactions within recipient food webs.
Types de publication
Letter
Meta-Analysis
Langues
eng
Pagination
265-274Subventions
Organisme : Canada Foundation for Innovation
Organisme : Canada Research Chairs
Organisme : Natural Sciences and Engineering Research Council of Canada
Organisme : Université de Moncton
Organisme : New Brunswick Foundation for Innovation
Organisme : Indian and Northern Affairs Canada
Organisme : Polar Continental Shelf Project
Informations de copyright
© 2018 John Wiley & Sons Ltd/CNRS.