Seasonal herbivory and mortality compensation in a swan-pondweed system
Many birds feed on submerged macrophytes during a temporally discrete period every year, for instance during migratory stopover or at the wintering grounds. Hence, seasonal herbivory is a common feature of the life cycle in many aquatic macrophytes. We are interested in the effect of Bewick's s...
Published in: | Ecological Modelling |
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2002
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Online Access: | https://pure.knaw.nl/portal/en/publications/79369050-b97d-4d82-b82d-7347bb29e220 https://doi.org/10.1016/S0304-3800(01)00426-4 https://hdl.handle.net/20.500.11755/79369050-b97d-4d82-b82d-7347bb29e220 |
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ftknawnlpublic:oai:pure.knaw.nl:publications/79369050-b97d-4d82-b82d-7347bb29e220 2024-02-04T09:59:57+01:00 Seasonal herbivory and mortality compensation in a swan-pondweed system Jonzén, N. Nolet, B.A. Santamaría, L. Svensson, M. 2002 https://pure.knaw.nl/portal/en/publications/79369050-b97d-4d82-b82d-7347bb29e220 https://doi.org/10.1016/S0304-3800(01)00426-4 https://hdl.handle.net/20.500.11755/79369050-b97d-4d82-b82d-7347bb29e220 eng eng info:eu-repo/semantics/closedAccess Jonzén , N , Nolet , B A , Santamaría , L & Svensson , M 2002 , ' Seasonal herbivory and mortality compensation in a swan-pondweed system ' , Ecological Modelling , vol. 147 , no. 3 , pp. 209-219 . https://doi.org/10.1016/S0304-3800(01)00426-4 article 2002 ftknawnlpublic https://doi.org/10.1016/S0304-3800(01)00426-420.500.11755/79369050-b97d-4d82-b82d-7347bb29e220 2024-01-10T23:12:46Z Many birds feed on submerged macrophytes during a temporally discrete period every year, for instance during migratory stopover or at the wintering grounds. Hence, seasonal herbivory is a common feature of the life cycle in many aquatic macrophytes. We are interested in the effect of Bewick's swans (Cygnus columbianus bewickii) feeding on the tubers of fennel pondweed (Potamogeton pectinatus) in the Netherlands every autumn. For that purpose, we developed a sequential macrophyte population model, including seasons of tuber production, herbivory and winter mortality as distinct and unambiguously defined events. The model is characterised and parameterised with both field and laboratory data. Tuber consumption inevitably decreases the density of ramets sprouting next spring, but it may actually increase the density of tubers produced in the following autumn. Hence, we can only understand the effect of grazing on the fennel pondweed population by recognising the seasonal structure of density-dependence. The mean density of fennel pondweed and the yield taken by swans are dependent on the foraging threshold below which no grazing takes place. Furthermore, the consumption has a stabilising effect for a wide range of parameter values. [KEYWORDS: aquatic macrophytes, Cygnus columbianus, functional response, Potamogeton pectinatus, sequential density-dependence] Many birds feed on submerged macrophytes during a temporally discrete period every year, for instance during migratory stopover or at the wintering grounds. Hence, seasonal herbivory is a common feature of the life cycle in many aquatic macrophytes. We are interested in the effect of Bewick's swans (Cygnus columbianus bewickii) feeding on the tubers of fennel pondweed (Potamogeton pectinatus) in the Netherlands every autumn. For that purpose, we developed a sequential macrophyte population model, including seasons of tuber production, herbivory and winter mortality as distinct and unambiguously defined events. The model is characterised and parameterised with ... Article in Journal/Newspaper Cygnus columbianus KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) Ecological Modelling 147 3 209 219 |
institution |
Open Polar |
collection |
KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) |
op_collection_id |
ftknawnlpublic |
language |
English |
description |
Many birds feed on submerged macrophytes during a temporally discrete period every year, for instance during migratory stopover or at the wintering grounds. Hence, seasonal herbivory is a common feature of the life cycle in many aquatic macrophytes. We are interested in the effect of Bewick's swans (Cygnus columbianus bewickii) feeding on the tubers of fennel pondweed (Potamogeton pectinatus) in the Netherlands every autumn. For that purpose, we developed a sequential macrophyte population model, including seasons of tuber production, herbivory and winter mortality as distinct and unambiguously defined events. The model is characterised and parameterised with both field and laboratory data. Tuber consumption inevitably decreases the density of ramets sprouting next spring, but it may actually increase the density of tubers produced in the following autumn. Hence, we can only understand the effect of grazing on the fennel pondweed population by recognising the seasonal structure of density-dependence. The mean density of fennel pondweed and the yield taken by swans are dependent on the foraging threshold below which no grazing takes place. Furthermore, the consumption has a stabilising effect for a wide range of parameter values. [KEYWORDS: aquatic macrophytes, Cygnus columbianus, functional response, Potamogeton pectinatus, sequential density-dependence] Many birds feed on submerged macrophytes during a temporally discrete period every year, for instance during migratory stopover or at the wintering grounds. Hence, seasonal herbivory is a common feature of the life cycle in many aquatic macrophytes. We are interested in the effect of Bewick's swans (Cygnus columbianus bewickii) feeding on the tubers of fennel pondweed (Potamogeton pectinatus) in the Netherlands every autumn. For that purpose, we developed a sequential macrophyte population model, including seasons of tuber production, herbivory and winter mortality as distinct and unambiguously defined events. The model is characterised and parameterised with ... |
format |
Article in Journal/Newspaper |
author |
Jonzén, N. Nolet, B.A. Santamaría, L. Svensson, M. |
spellingShingle |
Jonzén, N. Nolet, B.A. Santamaría, L. Svensson, M. Seasonal herbivory and mortality compensation in a swan-pondweed system |
author_facet |
Jonzén, N. Nolet, B.A. Santamaría, L. Svensson, M. |
author_sort |
Jonzén, N. |
title |
Seasonal herbivory and mortality compensation in a swan-pondweed system |
title_short |
Seasonal herbivory and mortality compensation in a swan-pondweed system |
title_full |
Seasonal herbivory and mortality compensation in a swan-pondweed system |
title_fullStr |
Seasonal herbivory and mortality compensation in a swan-pondweed system |
title_full_unstemmed |
Seasonal herbivory and mortality compensation in a swan-pondweed system |
title_sort |
seasonal herbivory and mortality compensation in a swan-pondweed system |
publishDate |
2002 |
url |
https://pure.knaw.nl/portal/en/publications/79369050-b97d-4d82-b82d-7347bb29e220 https://doi.org/10.1016/S0304-3800(01)00426-4 https://hdl.handle.net/20.500.11755/79369050-b97d-4d82-b82d-7347bb29e220 |
genre |
Cygnus columbianus |
genre_facet |
Cygnus columbianus |
op_source |
Jonzén , N , Nolet , B A , Santamaría , L & Svensson , M 2002 , ' Seasonal herbivory and mortality compensation in a swan-pondweed system ' , Ecological Modelling , vol. 147 , no. 3 , pp. 209-219 . https://doi.org/10.1016/S0304-3800(01)00426-4 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/S0304-3800(01)00426-420.500.11755/79369050-b97d-4d82-b82d-7347bb29e220 |
container_title |
Ecological Modelling |
container_volume |
147 |
container_issue |
3 |
container_start_page |
209 |
op_container_end_page |
219 |
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1789965026795192320 |