Invasion of Pacific oysters (Crassostrea gigas) in the Wadden Sea : competitive advantage over native mussels
Pacific oysters have been introduced into the northern Wadden Sea by aquaculture in the 1980s and subsequently established. As oyster larvae need hard substrates for settlement, they are overgrowing resident epibenthic mussel beds (Mytilus edulis). The impact of C. gigas on the native ecosystem was...
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ftunivkiel:oai:macau.uni-kiel.de:diss_mods_00001690 2024-06-23T07:52:15+00:00 Invasion of Pacific oysters (Crassostrea gigas) in the Wadden Sea : competitive advantage over native mussels Diederich, Susanne Reise, Karsten Wahl, Martin 2005 https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-16906 https://macau.uni-kiel.de/receive/diss_mods_00001690 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001690/d1690.pdf eng eng https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-16906 https://macau.uni-kiel.de/receive/diss_mods_00001690 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001690/d1690.pdf https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess ddc:590 thesis introduced species Crassostrea gigas Mytilus edulis coexistence survival growth predation ecology Wadden Sea dissertation Text doc-type:PhDThesis 2005 ftunivkiel 2024-06-12T14:21:16Z Pacific oysters have been introduced into the northern Wadden Sea by aquaculture in the 1980s and subsequently established. As oyster larvae need hard substrates for settlement, they are overgrowing resident epibenthic mussel beds (Mytilus edulis). The impact of C. gigas on the native ecosystem was assessed by investigating the population development and the scope for coexistence with M. edulis. The invasion of C. gigas started slowly with abundances remaining low for about 15 years. Only a succession of three summers with anomalous high water temperatures led to a massive population increase. Field experiments revealed differential settlement of both species and faster growth of C. gigas compared to M. edulis. A high survival rate of juvenile oysters was presumably caused by low predation pressure by the main benthic predators, shore crabs and starfish, which both strongly preferred mussels to oysters. As C. gigas is well adapted to the recipient ecosystem and competitive superior to their native congeners, the development of massive oyster reefs on the expense of mussel beds is expected. Doctoral or Postdoctoral Thesis Crassostrea gigas MACAU: Open Access Repository of Kiel University Pacific |
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Open Polar |
collection |
MACAU: Open Access Repository of Kiel University |
op_collection_id |
ftunivkiel |
language |
English |
topic |
ddc:590 thesis introduced species Crassostrea gigas Mytilus edulis coexistence survival growth predation ecology Wadden Sea |
spellingShingle |
ddc:590 thesis introduced species Crassostrea gigas Mytilus edulis coexistence survival growth predation ecology Wadden Sea Diederich, Susanne Invasion of Pacific oysters (Crassostrea gigas) in the Wadden Sea : competitive advantage over native mussels |
topic_facet |
ddc:590 thesis introduced species Crassostrea gigas Mytilus edulis coexistence survival growth predation ecology Wadden Sea |
description |
Pacific oysters have been introduced into the northern Wadden Sea by aquaculture in the 1980s and subsequently established. As oyster larvae need hard substrates for settlement, they are overgrowing resident epibenthic mussel beds (Mytilus edulis). The impact of C. gigas on the native ecosystem was assessed by investigating the population development and the scope for coexistence with M. edulis. The invasion of C. gigas started slowly with abundances remaining low for about 15 years. Only a succession of three summers with anomalous high water temperatures led to a massive population increase. Field experiments revealed differential settlement of both species and faster growth of C. gigas compared to M. edulis. A high survival rate of juvenile oysters was presumably caused by low predation pressure by the main benthic predators, shore crabs and starfish, which both strongly preferred mussels to oysters. As C. gigas is well adapted to the recipient ecosystem and competitive superior to their native congeners, the development of massive oyster reefs on the expense of mussel beds is expected. |
author2 |
Reise, Karsten Wahl, Martin |
format |
Doctoral or Postdoctoral Thesis |
author |
Diederich, Susanne |
author_facet |
Diederich, Susanne |
author_sort |
Diederich, Susanne |
title |
Invasion of Pacific oysters (Crassostrea gigas) in the Wadden Sea : competitive advantage over native mussels |
title_short |
Invasion of Pacific oysters (Crassostrea gigas) in the Wadden Sea : competitive advantage over native mussels |
title_full |
Invasion of Pacific oysters (Crassostrea gigas) in the Wadden Sea : competitive advantage over native mussels |
title_fullStr |
Invasion of Pacific oysters (Crassostrea gigas) in the Wadden Sea : competitive advantage over native mussels |
title_full_unstemmed |
Invasion of Pacific oysters (Crassostrea gigas) in the Wadden Sea : competitive advantage over native mussels |
title_sort |
invasion of pacific oysters (crassostrea gigas) in the wadden sea : competitive advantage over native mussels |
publishDate |
2005 |
url |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-16906 https://macau.uni-kiel.de/receive/diss_mods_00001690 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001690/d1690.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_relation |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-16906 https://macau.uni-kiel.de/receive/diss_mods_00001690 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001690/d1690.pdf |
op_rights |
https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess |
_version_ |
1802643512860082176 |