Scale-specific density dependence in North Sea sandeel

Anna Rindorf*, Ole Henriksen, Mikael van Deurs

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Density dependent demographic processes occur in many marine fishes and potentially enhance the stability of local aggregations and regional populations. The degree of density dependence exhibited at the population level is a combination of local density dependent effects acting on different spatial scales. In this study, we searched for density dependence in recruitment, growth and mortality of North Sea sandeel Ammodytes marinus at different spatial scales by analysing data at a spatial resolution specifically reflecting the mosaic of populated habitat patches. Two types of density dependent processes occurred: a shift in spatial distribution towards low mortality areas when overall recruitment was high, and an increase in local mortality as local density increased. When combined, these processes largely compensated for each other and the size of the overall population had little influence on population level mortality. The study points to the necessity of considering both local and regional scale processes in the analyses of density dependence.
Original languageEnglish
JournalMarine Ecology - Progress Series
Volume619
Pages (from-to)97-110
ISSN0171-8630
DOIs
Publication statusPublished - 2019

Keywords

  • Spatial scale dependency
  • Density dependent distribution
  • Demographic processes

Cite this

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title = "Scale-specific density dependence in North Sea sandeel",
abstract = "Density dependent demographic processes occur in many marine fishes and potentially enhance the stability of local aggregations and regional populations. The degree of density dependence exhibited at the population level is a combination of local density dependent effects acting on different spatial scales. In this study, we searched for density dependence in recruitment, growth and mortality of North Sea sandeel Ammodytes marinus at different spatial scales by analysing data at a spatial resolution specifically reflecting the mosaic of populated habitat patches. Two types of density dependent processes occurred: a shift in spatial distribution towards low mortality areas when overall recruitment was high, and an increase in local mortality as local density increased. When combined, these processes largely compensated for each other and the size of the overall population had little influence on population level mortality. The study points to the necessity of considering both local and regional scale processes in the analyses of density dependence.",
keywords = "Spatial scale dependency, Density dependent distribution, Demographic processes",
author = "Anna Rindorf and Ole Henriksen and {van Deurs}, Mikael",
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Scale-specific density dependence in North Sea sandeel. / Rindorf, Anna; Henriksen, Ole; van Deurs, Mikael.

In: Marine Ecology - Progress Series, Vol. 619, 2019, p. 97-110.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Scale-specific density dependence in North Sea sandeel

AU - Rindorf, Anna

AU - Henriksen, Ole

AU - van Deurs, Mikael

PY - 2019

Y1 - 2019

N2 - Density dependent demographic processes occur in many marine fishes and potentially enhance the stability of local aggregations and regional populations. The degree of density dependence exhibited at the population level is a combination of local density dependent effects acting on different spatial scales. In this study, we searched for density dependence in recruitment, growth and mortality of North Sea sandeel Ammodytes marinus at different spatial scales by analysing data at a spatial resolution specifically reflecting the mosaic of populated habitat patches. Two types of density dependent processes occurred: a shift in spatial distribution towards low mortality areas when overall recruitment was high, and an increase in local mortality as local density increased. When combined, these processes largely compensated for each other and the size of the overall population had little influence on population level mortality. The study points to the necessity of considering both local and regional scale processes in the analyses of density dependence.

AB - Density dependent demographic processes occur in many marine fishes and potentially enhance the stability of local aggregations and regional populations. The degree of density dependence exhibited at the population level is a combination of local density dependent effects acting on different spatial scales. In this study, we searched for density dependence in recruitment, growth and mortality of North Sea sandeel Ammodytes marinus at different spatial scales by analysing data at a spatial resolution specifically reflecting the mosaic of populated habitat patches. Two types of density dependent processes occurred: a shift in spatial distribution towards low mortality areas when overall recruitment was high, and an increase in local mortality as local density increased. When combined, these processes largely compensated for each other and the size of the overall population had little influence on population level mortality. The study points to the necessity of considering both local and regional scale processes in the analyses of density dependence.

KW - Spatial scale dependency

KW - Density dependent distribution

KW - Demographic processes

U2 - 10.3354/meps12945

DO - 10.3354/meps12945

M3 - Journal article

VL - 619

SP - 97

EP - 110

JO - Marine Ecology - Progress Series

JF - Marine Ecology - Progress Series

SN - 0171-8630

ER -