In situ method for measurements of community clearance rate on shallow water bivalve populations

Benni Winding Hansen, Per Dolmer, Bent Vismann

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

An open-top chamber was designed for measuring ambient community clearance rate on undisturbed bivalve populations in the field. The chamber was pressed 5-10 cm down in the sediment on the mussel bed. It holds approximately 30-40 cm water column equal to a volume of 43-77 L. It was provided with an air lift connected to a SCUBA diver pressure tank generating a continuous and gentle water circulation. This ensures a complete mixture of suspended particles, and thereby, a maximum filtration by the bivalves. An in situ fluorometer was mounted to record plant pigment reduction due to mussel clearance in real-time. To calibrate the in situ fluorometer triplicate water samples were obtained initially in each of the bivalve filtration measurements. The water samples were filtrated, extracted, and later analyzed for plant pigment concentration on a laboratory spectrophotometer. The main conclusion is that bivalve community clearance was an order of magnitude lower than predicted from laboratory extrapolations, which we explain by a natural variable activity level among the individuals in a given bivalve assemblage.

OriginalsprogEngelsk
TidsskriftLimnology and Oceanography: Methods
Vol/bind9
Sider (fra-til)454-459
ISSN1541-5856
DOI
StatusUdgivet - 2011

Citer dette

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title = "In situ method for measurements of community clearance rate on shallow water bivalve populations",
abstract = "An open-top chamber was designed for measuring ambient community clearance rate on undisturbed bivalve populations in the field. The chamber was pressed 5-10 cm down in the sediment on the mussel bed. It holds approximately 30-40 cm water column equal to a volume of 43-77 L. It was provided with an air lift connected to a SCUBA diver pressure tank generating a continuous and gentle water circulation. This ensures a complete mixture of suspended particles, and thereby, a maximum filtration by the bivalves. An in situ fluorometer was mounted to record plant pigment reduction due to mussel clearance in real-time. To calibrate the in situ fluorometer triplicate water samples were obtained initially in each of the bivalve filtration measurements. The water samples were filtrated, extracted, and later analyzed for plant pigment concentration on a laboratory spectrophotometer. The main conclusion is that bivalve community clearance was an order of magnitude lower than predicted from laboratory extrapolations, which we explain by a natural variable activity level among the individuals in a given bivalve assemblage.",
author = "Hansen, {Benni Winding} and Per Dolmer and Bent Vismann",
year = "2011",
doi = "10.4319/lom.2011.9.454",
language = "English",
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pages = "454--459",
journal = "Limnology and Oceanography: Methods",
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publisher = "John Wiley & Sons, Inc.",

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In situ method for measurements of community clearance rate on shallow water bivalve populations. / Hansen, Benni Winding; Dolmer, Per; Vismann, Bent.

I: Limnology and Oceanography: Methods, Bind 9, 2011, s. 454-459.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - In situ method for measurements of community clearance rate on shallow water bivalve populations

AU - Hansen, Benni Winding

AU - Dolmer, Per

AU - Vismann, Bent

PY - 2011

Y1 - 2011

N2 - An open-top chamber was designed for measuring ambient community clearance rate on undisturbed bivalve populations in the field. The chamber was pressed 5-10 cm down in the sediment on the mussel bed. It holds approximately 30-40 cm water column equal to a volume of 43-77 L. It was provided with an air lift connected to a SCUBA diver pressure tank generating a continuous and gentle water circulation. This ensures a complete mixture of suspended particles, and thereby, a maximum filtration by the bivalves. An in situ fluorometer was mounted to record plant pigment reduction due to mussel clearance in real-time. To calibrate the in situ fluorometer triplicate water samples were obtained initially in each of the bivalve filtration measurements. The water samples were filtrated, extracted, and later analyzed for plant pigment concentration on a laboratory spectrophotometer. The main conclusion is that bivalve community clearance was an order of magnitude lower than predicted from laboratory extrapolations, which we explain by a natural variable activity level among the individuals in a given bivalve assemblage.

AB - An open-top chamber was designed for measuring ambient community clearance rate on undisturbed bivalve populations in the field. The chamber was pressed 5-10 cm down in the sediment on the mussel bed. It holds approximately 30-40 cm water column equal to a volume of 43-77 L. It was provided with an air lift connected to a SCUBA diver pressure tank generating a continuous and gentle water circulation. This ensures a complete mixture of suspended particles, and thereby, a maximum filtration by the bivalves. An in situ fluorometer was mounted to record plant pigment reduction due to mussel clearance in real-time. To calibrate the in situ fluorometer triplicate water samples were obtained initially in each of the bivalve filtration measurements. The water samples were filtrated, extracted, and later analyzed for plant pigment concentration on a laboratory spectrophotometer. The main conclusion is that bivalve community clearance was an order of magnitude lower than predicted from laboratory extrapolations, which we explain by a natural variable activity level among the individuals in a given bivalve assemblage.

U2 - 10.4319/lom.2011.9.454

DO - 10.4319/lom.2011.9.454

M3 - Journal article

VL - 9

SP - 454

EP - 459

JO - Limnology and Oceanography: Methods

JF - Limnology and Oceanography: Methods

SN - 1541-5856

ER -