The occurrence and ecology of a marine hydrobiid mudsnail in the southern hemisphere: the Knysna Estuary, South Africa
Abstract Earlier published records of the gastropod Hydrobia from the warm temperate Knysna Lagoon on the Indian Ocean coast of South Africa are in error. Nevertheless, an animal hitherto identified as an Assiminea (Assimineidae) or as a Tomichia (Pomatiopsidae) is in fact a Hydrobia s.l., and it do...
Published in: | African Journal of Ecology |
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Online Access: | http://dx.doi.org/10.1046/j.1365-2028.2002.00375.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2028.2002.00375.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2028.2002.00375.x |
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crwiley:10.1046/j.1365-2028.2002.00375.x 2024-06-02T08:02:18+00:00 The occurrence and ecology of a marine hydrobiid mudsnail in the southern hemisphere: the Knysna Estuary, South Africa Barnes, R. S. K. 2002 http://dx.doi.org/10.1046/j.1365-2028.2002.00375.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2028.2002.00375.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2028.2002.00375.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor African Journal of Ecology volume 40, issue 3, page 289-294 ISSN 0141-6707 1365-2028 journal-article 2002 crwiley https://doi.org/10.1046/j.1365-2028.2002.00375.x 2024-05-03T11:03:47Z Abstract Earlier published records of the gastropod Hydrobia from the warm temperate Knysna Lagoon on the Indian Ocean coast of South Africa are in error. Nevertheless, an animal hitherto identified as an Assiminea (Assimineidae) or as a Tomichia (Pomatiopsidae) is in fact a Hydrobia s.l., and it does occur intertidally within the Knysna system. The same species also occurs in salt pans in the cool temperate Great Berg Estuary on the Atlantic coast of South Africa. This extends the distribution of confirmed species of the dominant coastal hydrobiid mudsnails of the northern hemisphere into the southern hemisphere. H. knysnaensis (Krauss) occurs patchily at low density near the head of the Knysna Estuary in waters of low salinity. This appears to be a suboptimal habitat, and it is suggested that Hydrobia is restricted to this zone as a result of interference competition from potamidid mudwhelks and ocypodid crabs. The prevalence of potamidids and ocypodids in the tropics and in the temperate southern hemisphere may account for the rareness or absence of hydrobiids in these areas. Unlike its equally intertidal relative, the widespread North Atlantic/Arctic H. ulvae , H. knysnaensis develops directly like other Hydrobia . Article in Journal/Newspaper Arctic Atlantic Arctic Atlantic-Arctic North Atlantic Wiley Online Library Arctic Indian African Journal of Ecology 40 3 289 294 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Earlier published records of the gastropod Hydrobia from the warm temperate Knysna Lagoon on the Indian Ocean coast of South Africa are in error. Nevertheless, an animal hitherto identified as an Assiminea (Assimineidae) or as a Tomichia (Pomatiopsidae) is in fact a Hydrobia s.l., and it does occur intertidally within the Knysna system. The same species also occurs in salt pans in the cool temperate Great Berg Estuary on the Atlantic coast of South Africa. This extends the distribution of confirmed species of the dominant coastal hydrobiid mudsnails of the northern hemisphere into the southern hemisphere. H. knysnaensis (Krauss) occurs patchily at low density near the head of the Knysna Estuary in waters of low salinity. This appears to be a suboptimal habitat, and it is suggested that Hydrobia is restricted to this zone as a result of interference competition from potamidid mudwhelks and ocypodid crabs. The prevalence of potamidids and ocypodids in the tropics and in the temperate southern hemisphere may account for the rareness or absence of hydrobiids in these areas. Unlike its equally intertidal relative, the widespread North Atlantic/Arctic H. ulvae , H. knysnaensis develops directly like other Hydrobia . |
format |
Article in Journal/Newspaper |
author |
Barnes, R. S. K. |
spellingShingle |
Barnes, R. S. K. The occurrence and ecology of a marine hydrobiid mudsnail in the southern hemisphere: the Knysna Estuary, South Africa |
author_facet |
Barnes, R. S. K. |
author_sort |
Barnes, R. S. K. |
title |
The occurrence and ecology of a marine hydrobiid mudsnail in the southern hemisphere: the Knysna Estuary, South Africa |
title_short |
The occurrence and ecology of a marine hydrobiid mudsnail in the southern hemisphere: the Knysna Estuary, South Africa |
title_full |
The occurrence and ecology of a marine hydrobiid mudsnail in the southern hemisphere: the Knysna Estuary, South Africa |
title_fullStr |
The occurrence and ecology of a marine hydrobiid mudsnail in the southern hemisphere: the Knysna Estuary, South Africa |
title_full_unstemmed |
The occurrence and ecology of a marine hydrobiid mudsnail in the southern hemisphere: the Knysna Estuary, South Africa |
title_sort |
occurrence and ecology of a marine hydrobiid mudsnail in the southern hemisphere: the knysna estuary, south africa |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1046/j.1365-2028.2002.00375.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2028.2002.00375.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2028.2002.00375.x |
geographic |
Arctic Indian |
geographic_facet |
Arctic Indian |
genre |
Arctic Atlantic Arctic Atlantic-Arctic North Atlantic |
genre_facet |
Arctic Atlantic Arctic Atlantic-Arctic North Atlantic |
op_source |
African Journal of Ecology volume 40, issue 3, page 289-294 ISSN 0141-6707 1365-2028 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2028.2002.00375.x |
container_title |
African Journal of Ecology |
container_volume |
40 |
container_issue |
3 |
container_start_page |
289 |
op_container_end_page |
294 |
_version_ |
1800746800350494720 |