Processing of C-13-labelled phytoplankton in a fine-grained sandy-shelf sediment (North Sea)

relative importance of different macrofauna species

A Kamp*, U Witte

*Corresponding author for this work

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

On-board and in situ experiments with C-13-labelled diatoms were carried out to investigate the processing of algal carbon by the macrofauna community of a fine sandy-shelf site in the southern German Bight (North Sea). The time series (12, 30, 32 and 132 h incubations) was supplemented by additional laboratory experiments on the role of the dominant macrofauna organism, the bivalve Fabulina fabula (Bivalvia: Tellinidae), for particulate organic matter subduction to deeper sediment layers. The specific uptake of algal C-13 by macrofauna organisms was visible after 12 h and constantly increased during the incubation periods. F. fabula, a facultative (surface) deposit- and suspension-feeder, Lanice conchilega (Polychaeta: Terebellidae), a suspension-feeder and the (surface) deposit-feeder Echinocardium cordatum (Echinodermata: Spatangidae) were responsible for the majority of macrofaunal carbon processing. Predatory macrofauna organisms like Nephtys spp. (Polychaeta: Nephtyidae) also quickly became labelled. The rapid subduction of fresh organic matter by F fabula down to ca. 4 to 7 cm sediment depth could be demonstrated, and it is suggested that entrainment by macrofauna in this fine-grained sand is much more efficient than advective transport.

Original languageEnglish
Pages (from-to)61-70
Number of pages10
JournalMarine Ecology Progress Series
Volume297
Publication statusPublished - 2005

Keywords

  • carbon processing
  • macrofauna
  • sandy sediments
  • C-13 labelling stable isotopes
  • North Sea
  • German bight
  • LANICE-CONCHILEGA
  • STABLE-ISOTOPES
  • ORGANIC-MATTER
  • IMPACT
  • DEGRADATION
  • DIATOMS
  • PHYTODETRITUS
  • DELTA-N-15
  • DELTA-C-13
  • COMMUNITY

Cite this

@article{292ad9df8994464687eb6a8d4e985531,
title = "Processing of C-13-labelled phytoplankton in a fine-grained sandy-shelf sediment (North Sea): relative importance of different macrofauna species",
abstract = "On-board and in situ experiments with C-13-labelled diatoms were carried out to investigate the processing of algal carbon by the macrofauna community of a fine sandy-shelf site in the southern German Bight (North Sea). The time series (12, 30, 32 and 132 h incubations) was supplemented by additional laboratory experiments on the role of the dominant macrofauna organism, the bivalve Fabulina fabula (Bivalvia: Tellinidae), for particulate organic matter subduction to deeper sediment layers. The specific uptake of algal C-13 by macrofauna organisms was visible after 12 h and constantly increased during the incubation periods. F. fabula, a facultative (surface) deposit- and suspension-feeder, Lanice conchilega (Polychaeta: Terebellidae), a suspension-feeder and the (surface) deposit-feeder Echinocardium cordatum (Echinodermata: Spatangidae) were responsible for the majority of macrofaunal carbon processing. Predatory macrofauna organisms like Nephtys spp. (Polychaeta: Nephtyidae) also quickly became labelled. The rapid subduction of fresh organic matter by F fabula down to ca. 4 to 7 cm sediment depth could be demonstrated, and it is suggested that entrainment by macrofauna in this fine-grained sand is much more efficient than advective transport.",
keywords = "carbon processing, macrofauna, sandy sediments, C-13 labelling stable isotopes, North Sea, German bight, LANICE-CONCHILEGA, STABLE-ISOTOPES, ORGANIC-MATTER, IMPACT, DEGRADATION, DIATOMS, PHYTODETRITUS, DELTA-N-15, DELTA-C-13, COMMUNITY",
author = "A Kamp and U Witte",
year = "2005",
language = "English",
volume = "297",
pages = "61--70",
journal = "Marine Ecology Progress Series",
issn = "0171-8630",
publisher = "Inter-Research",

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TY - JOUR

T1 - Processing of C-13-labelled phytoplankton in a fine-grained sandy-shelf sediment (North Sea)

T2 - relative importance of different macrofauna species

AU - Kamp, A

AU - Witte, U

PY - 2005

Y1 - 2005

N2 - On-board and in situ experiments with C-13-labelled diatoms were carried out to investigate the processing of algal carbon by the macrofauna community of a fine sandy-shelf site in the southern German Bight (North Sea). The time series (12, 30, 32 and 132 h incubations) was supplemented by additional laboratory experiments on the role of the dominant macrofauna organism, the bivalve Fabulina fabula (Bivalvia: Tellinidae), for particulate organic matter subduction to deeper sediment layers. The specific uptake of algal C-13 by macrofauna organisms was visible after 12 h and constantly increased during the incubation periods. F. fabula, a facultative (surface) deposit- and suspension-feeder, Lanice conchilega (Polychaeta: Terebellidae), a suspension-feeder and the (surface) deposit-feeder Echinocardium cordatum (Echinodermata: Spatangidae) were responsible for the majority of macrofaunal carbon processing. Predatory macrofauna organisms like Nephtys spp. (Polychaeta: Nephtyidae) also quickly became labelled. The rapid subduction of fresh organic matter by F fabula down to ca. 4 to 7 cm sediment depth could be demonstrated, and it is suggested that entrainment by macrofauna in this fine-grained sand is much more efficient than advective transport.

AB - On-board and in situ experiments with C-13-labelled diatoms were carried out to investigate the processing of algal carbon by the macrofauna community of a fine sandy-shelf site in the southern German Bight (North Sea). The time series (12, 30, 32 and 132 h incubations) was supplemented by additional laboratory experiments on the role of the dominant macrofauna organism, the bivalve Fabulina fabula (Bivalvia: Tellinidae), for particulate organic matter subduction to deeper sediment layers. The specific uptake of algal C-13 by macrofauna organisms was visible after 12 h and constantly increased during the incubation periods. F. fabula, a facultative (surface) deposit- and suspension-feeder, Lanice conchilega (Polychaeta: Terebellidae), a suspension-feeder and the (surface) deposit-feeder Echinocardium cordatum (Echinodermata: Spatangidae) were responsible for the majority of macrofaunal carbon processing. Predatory macrofauna organisms like Nephtys spp. (Polychaeta: Nephtyidae) also quickly became labelled. The rapid subduction of fresh organic matter by F fabula down to ca. 4 to 7 cm sediment depth could be demonstrated, and it is suggested that entrainment by macrofauna in this fine-grained sand is much more efficient than advective transport.

KW - carbon processing

KW - macrofauna

KW - sandy sediments

KW - C-13 labelling stable isotopes

KW - North Sea

KW - German bight

KW - LANICE-CONCHILEGA

KW - STABLE-ISOTOPES

KW - ORGANIC-MATTER

KW - IMPACT

KW - DEGRADATION

KW - DIATOMS

KW - PHYTODETRITUS

KW - DELTA-N-15

KW - DELTA-C-13

KW - COMMUNITY

M3 - Article

VL - 297

SP - 61

EP - 70

JO - Marine Ecology Progress Series

JF - Marine Ecology Progress Series

SN - 0171-8630

ER -