Data/hora: 02/06/2024 06:46:08

Provedor de dados: | 27
País: | Belgium
Título: | Distribution and adaptations of sea ice inhabiting &lt;i&gt;Harpacticoida&lt;/i&gt; (Crustacea, Copepoda) of the Weddell Sea (Antarctica)
Autores: | Dahms, H.-U.; Bergmans, M.; Schminke, H.K.
Data: | 1990
Ano: | 1990
Palavras-chave: | Biogeography Dormancy Ecology Life history Salinity tolerance Harpacticoida PSW; Weddell Sea.
Resumo: | Seven harpacticoid species were found to be associated with sea ice collected during 5 Antarctic cruises of the &lt;i&gt;RV Polarstern&lt;/i&gt;. Their distribution within the fast ice and pack ice zones of the Weddell Sea is presented. Whereas some individuals probably become entrapped into the ice only accidentally, at least 4 species are genuinely sympagic. These have evolved remarkable adaptations, as evidenced by field and laboratory studies of &lt;i&gt;Drescheriella glacialis&lt;/i&gt;, which is by far the most abundant. Such adaptations include: the ability to penetrate deep into ice; a comparatively high salinity tolerance allowing it to endure large salinity fluctuations associated with ice crystal formation and melting; good swimming ability, necessary both for horizontal dispersal and for a planktonic intermezzo after annual melting of the sea ice. &lt;i&gt;D. glacialis&lt;/i&gt; is the first polar non-vertebrate metazoan to be cultivated through its entire life cycle. Its life history suggests an r-strategy; this would be the first indication of such a trait in the polar environment. A new species of &lt;i&gt;Drescheriella&lt;/i&gt;, on the other hand, exhibits resting stages (CIV-V) known to date only for &lt;i&gt;Calanoida&lt;/i&gt; but not reported for &lt;i&gt;Harpacticoida&lt;/i&gt;.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3067
Fonte: | %3Ci%3EMar.+Ecol.+%28Berl.%29+11%283%29%3C%2Fi%3E%3A+207-226
Fonte: | info:eu-repo/semantics/restrictedAccess