Nom du corpus

Corpus Systématique Animale

Titre du document

Physiological basis of the species abundance-salinity relationship in molluscs: A speculation

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Mollusques_v2b_00124
Auteur(s)
  • L. F. Gainey Jr. 1,2
  • M. J. Greenberg 1
Affiliation(s)
  • 1) Department of Biological Sciences, Florida State University, Tallahassee, Florida, USA
  • 2) Department of Biological Sciences, The University of Maine at Portland-Gorham, 04103, Portland, Maine, USA
Résumé

The relationship between the osmotic pressures of the blood and the ambient medium was determined for 4 species of bivalve molluscs whose habitats represent distinct salinity regimes within the range from fresh to full seawater. These organisms included 3 corbiculids: Corbicula manilensis (freshwater); Polymesoda caroliniana (brackish-water); Pseudocyrena floridana (marine) and 1 unionid: Elliptio lanceolata. On the basis of the data and similar measurements from the literature, we have placed the molluscs into 5 categories: marine stenohaline, marine euryhaline, oligohaline, fresh-water euryhaline and freshwater stenohaline. Marine stenohaline and euryhaline species are osmoconformers. They differ only in the size of the free amino acid pool available for intracellular volume regulation, and thus in the range of salinities that they tolerate. Oligohaline species tolerate salinities from seawater down to freshwater; they not only possess a large capacity for volume regulation, but can also osmoregulate below 3‰ S. Freshwater species also osmoregulate below 3‰ S, but they are usually limited to salinities below 2‰. Presumably, in evolving from the marine to the freshwater habit, they have lost the ability to volume-regulate in response to hyperosmotic stress. We propose that the varying physiological characteristics underlie the well-known relationship that species abundance declines from both freshwater and full seawater to a minimum between 3 and 5‰ S. We have related this species minimum to physical-chemical discontinuities in the ionic composition of seawater which are, again, reflected in the physiological mechanisms of the molluscs.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - invertebres
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Ecology
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
Identifiant ISTEX
083FBAE3FC43234F4AA79C749BBA6533A49A6A47
Revue

Marine Biology

Année de publication
1977
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.856
Sous-corpus
  • Mollusques
Type de publication
Journal
ark:/67375/1BB-0K2KFBGK-H
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