Nom du corpus

Corpus Systématique Animale

Titre du document

Factors influencing the distribution and coexistence of Pachygrapsus crassipes and Hemigrapsus oregonensis (Decapoda: Grapsidae) in a California salt marsh

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Arthropodes_v2b_01910
Auteur(s)
  • S. W. Willason
Affiliation(s)
  • Marine Science Institute, University of California at Santa Barbara, 93106, Santa Barbara, California, USA
Résumé

Pachygrapsus crassipes Randall and Hemigrapsus oregonensis (Dana), coexisting grapsid crabs, were studied in a tidal marsh near Santa Barbara, California, USA. Both species are found in intertidal mud burrows along banks of the slough channels. H. oregonensis occupies the entire intertidal vertical range on the mud banks, whereas P. crassipes inhabits primarily the uppermost zone (above +1.4 m). In areas where both species occur in large numbers, the density of H. oregonensis in the uppermost zone is less than in areas with only a few P. crassipes. P. crassipes does not excavate burrows, but moves into and enlarges the existing burrows of H. oregonensis. P. crassipes also preys upon H. oregonensis, but burrowing provides the latter with partial refuge from predation. Population structures of the two species differ in the number of small crabs that occur in different areas of the slough. Few small specimens of P. crassipes are found along the upstream muddy banks of the slough, whereas young specimens of H. oregonensis are abundant in these areas. Physical factors such as salinity and siltation may restrict settlement or reduce survivorship of small P. crassipes. A balance between the predatory/competitive abilities of P. crassipes and the greater tolerance of H. oregonensis to physical stresses is proposed as a mechanism of coexistence.

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 - psychologie. psychophysiologie
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
5650D182AB9B55DCD507258034B0844714138416
Revue

Marine Biology

Année de publication
1981
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.206
Sous-corpus
  • Arthropodes
Type de publication
Journal
ark:/67375/1BB-FX1WH2MT-L
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