English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  δ¹³C and δ¹⁵N reveal significant differences in the coastal foodwebs of the seas surrounding Trinidad and Tobago

Mallela, J., & Harrod, C. (2008). δ¹³C and δ¹⁵N reveal significant differences in the coastal foodwebs of the seas surrounding Trinidad and Tobago. Marine Ecology Progress Series, 368, 41-51. doi:10.3354/meps07589.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D667-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D668-8
Genre: Journal Article

Files

show Files
hide Files
:
mallela_2008.pdf (Publisher version), 285KB
 
File Permalink:
-
Name:
mallela_2008.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute for Evolutionary Biology, Plön; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Mallela, Jennie1, Author              
Harrod, Chris1, 2, Author              
Affiliations:
1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              
2Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445635              

Content

show
hide
Free keywords: stable isotope; trophic; energetic subsidy; filter-feeder; grazer; marine; Orinoco
 Abstract: This study assessed nearshore, marine ecosystem function around Trinidad and Tobago (TT). The coastline of TT is highly complex, bordered by the Atlantic Ocean, the Caribbean Sea, the Gulf of Paria and the Columbus Channel, and subject to local terrestrial runoff and regional riverine inputs (e.g. the Orinoco and Amazon rivers). Coastal organisms can assimilate energy from allochthonous and autochthonous sources. We assessed whether stable isotopes δ13C and δ15N could be used to provide a rapid assessment of trophic interactions in primary consumers around the islands. Filter-feeding (bivalves and barnacles) and grazing organisms (gastropods and chitons) were collected from 40 marine sites during the wet season. The flesh of organisms was analysed for δ13C and δ15N. Results indicate significant variation in primary consumers (by feeding guild and sampling zone). This variation was linked to different energy sources being assimilated by consumers. Results suggest that offshore production is fuelling intertidal foodwebs; for example, a depleted δ13C signature in grazers from the Gulf of Paria, Columbus Channel and the Caribbean and Atlantic coastline of Tobago indicates that carbon with an offshore origin (e.g. phytoplankton and dissolved organic matter) is more important than benthic or littoral algae during the wet season. Results also confirm findings from other studies indicating that much of the coastline is subject to cultural eutrophication. This study revealed that ecosystem function is spatially variable around the coastline of TT. This has clear implications for marine resource management, as a single management approach is unlikely to be successful at a national level.

Details

show
hide
Language(s): eng - English
 Dates: 2008-09-25
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 378639
DOI: 10.3354/meps07589
Other: 2632/S 38898
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Marine Ecology Progress Series
  Alternative Title : Mar Ecol Prog Ser
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 368 Sequence Number: - Start / End Page: 41 - 51 Identifier: ISSN: 0171-8630 (print)
ISSN: 1616-1599 (online)