| Title: |
Multiple configurations and fluctuating trophic control in the Barents Sea food-web |
| Authors: |
Sivel, Elliot; Planque, Benjamin; Lindstrøm, Ulf; Yoccoz, Nigel G. |
| Publisher Information: |
Public Library of Science |
| Publication Year: |
2021 |
| Collection: |
University of Tromsø: Munin Open Research Archive |
| Subject Terms: |
VDP::Mathematics and natural science: 400::Zoology and botany: 480; VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
| Description: |
The Barents Sea is a subarctic shelf sea which has experienced major changes during the past decades. From ecological time-series, three different food-web configurations, reflecting successive shifts of dominance of pelagic fish, demersal fish, and zooplankton, as well as varying trophic control have been identified in the last decades. This covers a relatively short time-period as available ecological time-series are often relatively short. As we lack information for prior time-periods, we use a chance and necessity model to investigate if there are other possible configurations of the Barents Sea food-web than those observed in the ecological time-series, and if this food-web is characterized by a persistent trophic control. We perform food-web simulations using the Non-Deterministic Network Dynamic model (NDND) for the Barents Sea, identify food-web configurations and compare those to historical reconstructions of food-web dynamics. Biomass configurations fall into four major types and three trophic pathways. Reconstructed data match one of the major biomass configurations but is characterized by a different trophic pathway than most of the simulated configurations. The simulated biomass displays fluctuations between bottom-up and top-down trophic control over time rather than persistent trophic control. Our results show that the configurations we have reconstructed are strongly overlapping with our simulated configurations, though they represent only a subset of the possible configurations of the Barents Sea food-web. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
Sivel, E. (2022).Investigating the drivers of the Nordic Seas food-web dynamics using Chance and Necessity modelling. (Doctoral thesis). https://hdl.handle.net/10037/24705 .; PLOS ONE; info:eu-repo/grantAgreement/RCN/NANSEN/276730/Norway/The Nansen Legacy//; FRIDAID 1926449; https://hdl.handle.net/10037/22110 |
| DOI: |
10.1371/journal.pone.0254015 |
| Availability: |
https://hdl.handle.net/10037/22110; https://doi.org/10.1371/journal.pone.0254015 |
| Rights: |
openAccess ; Copyright 2021 The Author(s) |
| Accession Number: |
edsbas.771ACB49 |
| Database: |
BASE |