Benthic oxygen exchange in a live coralline algal bed and an adjacent sandy habitat: an eddy covariance study

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: onr:"swepub:oai:DiVA.org:umu-195849" > Benthic oxygen exch...

1 of 1
Previous record
Next record
To hitlist

Benthic oxygen exchange in a live coralline algal bed and an adjacent sandy habitat : an eddy covariance study

Attard, Karl M. (author)

Stahl, Henrik (author)

Kamenos, Nicholas A. (author): School of Geographical and Earth Sciences, University of Glasgow, Glasgow, UK,UMFpub

Turner, Gavin (author)

Burdett, Heidi L. (author)

Glud, Ronnie N. (author)

show less...

(creator_code:org_t)

Inter-Research, 2015
2015
English.
In: Marine Ecology Progress Series. - : Inter-Research. - 0171-8630 .- 1616-1599. ; 535, s. 99-115

Related links:: https://doi.org/10.3...; show more...; https://umu.diva-por... (primary) (Raw object); https://www.int-res....; https://urn.kb.se/re...; https://doi.org/10.3...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Coralline algal (maerl) beds are widespread, slow-growing, structurally complex perennial habitats that support high biodiversity, yet are significantly understudied compared to seagrass beds or kelp forests. We present the first eddy covariance (EC) study on a live maerl bed, assessing the community benthic gross primary productivity (GPP), respiration (R), and net ecosystem metabolism (NEM) derived from diel EC time series collected during 5 seasonal measurement campaigns in temperate Loch Sween, Scotland. Measurements were also carried out at an adjacent (similar to 20 m distant) permeable sandy habitat. The O-2 exchange rate was highly dynamic, driven by light availability and the ambient tidally-driven flow velocity. Linear relationships between the EC O-2 fluxes and available light indicate that the benthic phototrophic communities were light limited. Compensation irradiance (E-c) varied seasonally and was typically similar to 1.8-fold lower at the maerl bed compared to the sand. Substantial GPP was evident at both sites; however, the maerl bed and the sand habitat were net heterotrophic during each sampling campaign. Additional inputs of similar to 4 and similar to 7 mol m(-2) yr(-1) of carbon at the maerl bed and sand site, respectively, were required to sustain the benthic O-2 demand. Thus, the 2 benthic habitats efficiently entrap organic carbon and are sinks of organic material in the coastal zone. Parallel deployment of 0.1 m(2) benthic chambers during nighttime revealed O-2 uptake rates that varied by up to similar to 8-fold between replicate chambers (from -0.4 to -3.0 mmol O-2 m(-2) h(-1); n = 4). However, despite extensive O-2 flux variability on meter horizontal scales, mean rates of O-2 uptake as resolved in parallel by chambers and EC were typically within 20% of one another.

Subject headings

NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)

Keyword

Benthic oxygen exchange
Benthic primary production
Coastal carbon cycling
Coralline algae
Permeable sediment
Eddy covariance
Benthic chambers

Publication and Content Type

ref (subject category)
art (subject category)

Find in a library

Marine Ecology Progress Series (Search for host publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Attard, Karl M.; Stahl, Henrik; Kamenos, Nichola ...; Turner, Gavin; Burdett, Heidi L ...; Glud, Ronnie N.

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geochemistry

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Ecology

Articles in the publication: Marine Ecology P ...

By the university: Umeå University

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se