Skip to main content

Free Content Patterns of abundance and seasonality of polychaetes sheltering in southwestern Atlantic estuarine epibenthic shell beds

Download Article:
 Download
(PDF 602.4296875 kb)
 

Abstract:

The purpose of this study was to investigate the spatial and temporal distribution of the polychaete species that inhabit shell cavities in beds of the stout razor clam Tagelus plebeius. Samples were taken bimonthly between July 1996 and September 1997, and an additional one was taken in February 1998. The assemblage was dominated by the amphipod Corophium insidiosum and three polychaete species (Laeonereis acuta, Heteromastus similis and Neanthes succinea). The abundance of L. acuta was higher in summer, simultaneously with the occurrence of juveniles. In contrast, C. insidiosum and H. similis were more abundant in winter together with the occurrence of juveniles of the latter species. The predator N. succinea occurred at the end of the sampling period, concurrently with a decrease in all other macroinfaunal taxa. An estimation based on polychaete predation rates indicated that these decreases in macroinfaunal densities may be the result of consumption by N. succinea. Polychaete distribution along the intertidal slope did not vary along the sampling period. Higher density of polychaetes was found in the internal shell sediment than in the sediment outside them. All the evidence suggests that variability in the intensity of species recruitment and direct or indirect biotic interactions may determine the spatial and temporal distribution of macroinfaunal species in these beds.

Document Type: Research Article

Publication date: 2000-07-01

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more