Trophic structuring of modularity alters energy flow through marine food webs

Research output: Contribution to journalArticlepeer-review

Standard Standard

Trophic structuring of modularity alters energy flow through marine food webs. / Eskuche-Keith, Patrick; Hill, Simeon L.; Hollyman, Philip et al.
In: Frontiers in Marine Science, Vol. 9, 12.01.2023.

Research output: Contribution to journalArticlepeer-review

HarvardHarvard

Eskuche-Keith, P, Hill, SL, Hollyman, P, Taylor, ML & O’Gorman, EJ 2023, 'Trophic structuring of modularity alters energy flow through marine food webs', Frontiers in Marine Science, vol. 9. https://doi.org/10.3389/fmars.2022.1046150

APA

Eskuche-Keith, P., Hill, S. L., Hollyman, P., Taylor, M. L., & O’Gorman, E. J. (2023). Trophic structuring of modularity alters energy flow through marine food webs. Frontiers in Marine Science, 9. https://doi.org/10.3389/fmars.2022.1046150

CBE

Eskuche-Keith P, Hill SL, Hollyman P, Taylor ML, O’Gorman EJ. 2023. Trophic structuring of modularity alters energy flow through marine food webs. Frontiers in Marine Science. 9. https://doi.org/10.3389/fmars.2022.1046150

MLA

VancouverVancouver

Eskuche-Keith P, Hill SL, Hollyman P, Taylor ML, O’Gorman EJ. Trophic structuring of modularity alters energy flow through marine food webs. Frontiers in Marine Science. 2023 Jan 12;9. doi: 10.3389/fmars.2022.1046150

Author

Eskuche-Keith, Patrick ; Hill, Simeon L. ; Hollyman, Philip et al. / Trophic structuring of modularity alters energy flow through marine food webs. In: Frontiers in Marine Science. 2023 ; Vol. 9.

RIS

TY - JOUR

T1 - Trophic structuring of modularity alters energy flow through marine food webs

AU - Eskuche-Keith, Patrick

AU - Hill, Simeon L.

AU - Hollyman, Philip

AU - Taylor, Michelle L.

AU - O’Gorman, Eoin J.

PY - 2023/1/12

Y1 - 2023/1/12

N2 - Food web interactions govern how ecosystems respond to climate change and biodiversity loss. Modularity, where subgroups of species interact more often with each other than with species outside their subgroup, is a key structural feature which has been linked to food web stability. We sought to address the lack of understanding of how modularity varies among ecosystems by comparing the structure of four highly resolved marine food webs, using a simulated annealing algorithm to identify network modules and Random Forest models to predict the distribution of species across modules based on a set of eight functional traits. Modules in two offshore networks were partitioned largely by trophic level, creating an interdependence among them, whereas modules in two semi-enclosed bays were generally separated into energy channels with less trophic separation and containing distinct basal resources, providing greater redundancy in the flow of energy through the network. Foraging habitat and mobility predicted module membership in all networks, whilst body mass and foraging strategy also differentiated modules in the offshore and bay ecosystems, respectively. Environmental heterogeneity may be a key factor driving the differences in modularity and the relative importance of functional traits for predicting module membership. Our results indicate that, in addition to overall network modularity, the trophic structure of modules within food webs should be considered when making inferences about ecosystem stability.

AB - Food web interactions govern how ecosystems respond to climate change and biodiversity loss. Modularity, where subgroups of species interact more often with each other than with species outside their subgroup, is a key structural feature which has been linked to food web stability. We sought to address the lack of understanding of how modularity varies among ecosystems by comparing the structure of four highly resolved marine food webs, using a simulated annealing algorithm to identify network modules and Random Forest models to predict the distribution of species across modules based on a set of eight functional traits. Modules in two offshore networks were partitioned largely by trophic level, creating an interdependence among them, whereas modules in two semi-enclosed bays were generally separated into energy channels with less trophic separation and containing distinct basal resources, providing greater redundancy in the flow of energy through the network. Foraging habitat and mobility predicted module membership in all networks, whilst body mass and foraging strategy also differentiated modules in the offshore and bay ecosystems, respectively. Environmental heterogeneity may be a key factor driving the differences in modularity and the relative importance of functional traits for predicting module membership. Our results indicate that, in addition to overall network modularity, the trophic structure of modules within food webs should be considered when making inferences about ecosystem stability.

KW - energy channels

KW - functional traits

KW - modules

KW - network structure

KW - predator-prey mass ratio

KW - stability

KW - trophic interactions

U2 - 10.3389/fmars.2022.1046150

DO - 10.3389/fmars.2022.1046150

M3 - Article

VL - 9

JO - Frontiers in Marine Science

JF - Frontiers in Marine Science

SN - 2296-7745

ER -