What is the menu today in a subantarctic kelp food web from the Kerguelen Islands? Phytodetritus, phytoplankton and phytobenthos; not living kelp
peer reviewed Kelp forests dominated by Macrocystis pyrifera are widely distributed in coastal waters from boreal, temperate and subantarctic regions. This widespread distribution may result in regional differences in food web structure and functioning. In temperate northern regions, where most stud...
Published in: | Marine Biology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Science and Business Media Deutschland GmbH
2022
|
Subjects: | |
Online Access: | https://orbi.uliege.be/handle/2268/294887 https://doi.org/10.1007/s00227-022-04105-z |
id |
ftorbi:oai:orbi.ulg.ac.be:2268/294887 |
---|---|
record_format |
openpolar |
spelling |
ftorbi:oai:orbi.ulg.ac.be:2268/294887 2024-04-21T08:06:28+00:00 What is the menu today in a subantarctic kelp food web from the Kerguelen Islands? Phytodetritus, phytoplankton and phytobenthos; not living kelp Le Bourg, Baptiste Saucède, Thomas Charpentier, Anouk Lepoint, Gilles Michel, Loïc 2022-09 https://orbi.uliege.be/handle/2268/294887 https://doi.org/10.1007/s00227-022-04105-z en eng Springer Science and Business Media Deutschland GmbH https://link.springer.com/content/pdf/10.1007/s00227-022-04105-z.pdf 10.15468/frpbz6 urn:issn:0025-3162 urn:issn:1432-1793 https://orbi.uliege.be/handle/2268/294887 info:hdl:2268/294887 doi:10.1007/s00227-022-04105-z scopus-id:2-s2.0-85137583091 embargoed access http://purl.org/coar/access_right/c_f1cf info:eu-repo/semantics/embargoedAccess Marine Biology, 169 (9) (2022-09) Benthic communities Food web Kelp forests Mixing models Stable isotopes Ecology Evolution Behavior and Systematics Aquatic Science Life sciences Aquatic sciences & oceanology Environmental sciences & ecology Zoology Sciences du vivant Sciences aquatiques & océanologie Sciences de l’environnement & écologie Zoologie journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2022 ftorbi https://doi.org/10.1007/s00227-022-04105-z 2024-03-27T14:57:31Z peer reviewed Kelp forests dominated by Macrocystis pyrifera are widely distributed in coastal waters from boreal, temperate and subantarctic regions. This widespread distribution may result in regional differences in food web structure and functioning. In temperate northern regions, where most studies on kelp forest benthic food webs have been conducted, kelp grazing is a well-documented phenomenon and can lead to the overgrazing of M. pyrifera by sea urchins when their predators (e.g., sea otters) are absent. In contrast, little is known about their counterparts in subantarctic areas. The present study aimed to reconstruct the benthic food web of a kelp forest dominated by M. pyrifera in a subantarctic environment using stable isotope analysis. Stable carbon (δ13C), nitrogen (δ15N) and sulfur (δ34S) isotope ratios were measured from food sources (macrophytobenthos, suspended particulate organic matter SPOM, and sediment) and consumers (sponges, bivalves, gastropods, sedentary and mobile polychaetes, arthropods and echinoderms) which were sampled in a kelp forest of the Kerguelen archipelago. Mixing models highlighted two interconnected trophic pathways which were either supported by SPOM and resuspended macrophytobenthos detritus (bentho-pelagic), or by live micro/macrophytobenthos (phytobenthos-based). No major prey were highlighted for several consumers, indicating the existence of potential supplementary trophic pathways. No consumer relying primarily on living M. pyrifera was highlighted by the mixing models. The investigated kelp forest is hence a complex ecosystem supporting multiple trophic pathways, and direct consumption of M. pyrifera is limited. Nonetheless, M. pyrifera and other macrophytobenthos species may constitute a pool of detritus supporting several trophic pathways. Effects of global change on the marine benthos and habitats in Kerguelen Islands (PROTEKER) Refugia and Ecosystem Tolerance in the Southern Ocean (RECTO project) Article in Journal/Newspaper Kerguelen Islands Southern Ocean University of Liège: ORBi (Open Repository and Bibliography) Marine Biology 169 9 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Benthic communities Food web Kelp forests Mixing models Stable isotopes Ecology Evolution Behavior and Systematics Aquatic Science Life sciences Aquatic sciences & oceanology Environmental sciences & ecology Zoology Sciences du vivant Sciences aquatiques & océanologie Sciences de l’environnement & écologie Zoologie |
spellingShingle |
Benthic communities Food web Kelp forests Mixing models Stable isotopes Ecology Evolution Behavior and Systematics Aquatic Science Life sciences Aquatic sciences & oceanology Environmental sciences & ecology Zoology Sciences du vivant Sciences aquatiques & océanologie Sciences de l’environnement & écologie Zoologie Le Bourg, Baptiste Saucède, Thomas Charpentier, Anouk Lepoint, Gilles Michel, Loïc What is the menu today in a subantarctic kelp food web from the Kerguelen Islands? Phytodetritus, phytoplankton and phytobenthos; not living kelp |
topic_facet |
Benthic communities Food web Kelp forests Mixing models Stable isotopes Ecology Evolution Behavior and Systematics Aquatic Science Life sciences Aquatic sciences & oceanology Environmental sciences & ecology Zoology Sciences du vivant Sciences aquatiques & océanologie Sciences de l’environnement & écologie Zoologie |
description |
peer reviewed Kelp forests dominated by Macrocystis pyrifera are widely distributed in coastal waters from boreal, temperate and subantarctic regions. This widespread distribution may result in regional differences in food web structure and functioning. In temperate northern regions, where most studies on kelp forest benthic food webs have been conducted, kelp grazing is a well-documented phenomenon and can lead to the overgrazing of M. pyrifera by sea urchins when their predators (e.g., sea otters) are absent. In contrast, little is known about their counterparts in subantarctic areas. The present study aimed to reconstruct the benthic food web of a kelp forest dominated by M. pyrifera in a subantarctic environment using stable isotope analysis. Stable carbon (δ13C), nitrogen (δ15N) and sulfur (δ34S) isotope ratios were measured from food sources (macrophytobenthos, suspended particulate organic matter SPOM, and sediment) and consumers (sponges, bivalves, gastropods, sedentary and mobile polychaetes, arthropods and echinoderms) which were sampled in a kelp forest of the Kerguelen archipelago. Mixing models highlighted two interconnected trophic pathways which were either supported by SPOM and resuspended macrophytobenthos detritus (bentho-pelagic), or by live micro/macrophytobenthos (phytobenthos-based). No major prey were highlighted for several consumers, indicating the existence of potential supplementary trophic pathways. No consumer relying primarily on living M. pyrifera was highlighted by the mixing models. The investigated kelp forest is hence a complex ecosystem supporting multiple trophic pathways, and direct consumption of M. pyrifera is limited. Nonetheless, M. pyrifera and other macrophytobenthos species may constitute a pool of detritus supporting several trophic pathways. Effects of global change on the marine benthos and habitats in Kerguelen Islands (PROTEKER) Refugia and Ecosystem Tolerance in the Southern Ocean (RECTO project) |
format |
Article in Journal/Newspaper |
author |
Le Bourg, Baptiste Saucède, Thomas Charpentier, Anouk Lepoint, Gilles Michel, Loïc |
author_facet |
Le Bourg, Baptiste Saucède, Thomas Charpentier, Anouk Lepoint, Gilles Michel, Loïc |
author_sort |
Le Bourg, Baptiste |
title |
What is the menu today in a subantarctic kelp food web from the Kerguelen Islands? Phytodetritus, phytoplankton and phytobenthos; not living kelp |
title_short |
What is the menu today in a subantarctic kelp food web from the Kerguelen Islands? Phytodetritus, phytoplankton and phytobenthos; not living kelp |
title_full |
What is the menu today in a subantarctic kelp food web from the Kerguelen Islands? Phytodetritus, phytoplankton and phytobenthos; not living kelp |
title_fullStr |
What is the menu today in a subantarctic kelp food web from the Kerguelen Islands? Phytodetritus, phytoplankton and phytobenthos; not living kelp |
title_full_unstemmed |
What is the menu today in a subantarctic kelp food web from the Kerguelen Islands? Phytodetritus, phytoplankton and phytobenthos; not living kelp |
title_sort |
what is the menu today in a subantarctic kelp food web from the kerguelen islands? phytodetritus, phytoplankton and phytobenthos; not living kelp |
publisher |
Springer Science and Business Media Deutschland GmbH |
publishDate |
2022 |
url |
https://orbi.uliege.be/handle/2268/294887 https://doi.org/10.1007/s00227-022-04105-z |
genre |
Kerguelen Islands Southern Ocean |
genre_facet |
Kerguelen Islands Southern Ocean |
op_source |
Marine Biology, 169 (9) (2022-09) |
op_relation |
https://link.springer.com/content/pdf/10.1007/s00227-022-04105-z.pdf 10.15468/frpbz6 urn:issn:0025-3162 urn:issn:1432-1793 https://orbi.uliege.be/handle/2268/294887 info:hdl:2268/294887 doi:10.1007/s00227-022-04105-z scopus-id:2-s2.0-85137583091 |
op_rights |
embargoed access http://purl.org/coar/access_right/c_f1cf info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1007/s00227-022-04105-z |
container_title |
Marine Biology |
container_volume |
169 |
container_issue |
9 |
_version_ |
1796945847075733504 |