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Functional response...
Functional response of Oikopleura dioica to house clogging due to exposure to algae of different sizes
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- Tiselius, Peter, 1958 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för marin ekologi,Department of Marine Ecology
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Petersen, J. K. (author)
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Nielsen, T. G. (author)
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Maar, M. (author)
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Moller, E. F. (author)
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Satapoomin, S. (author)
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Tonnesson, K. (author)
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Zervoudaki, T. (author)
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Christou, E. (author)
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Giannakourou, A. (author)
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Sell, A. (author)
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Vargas, C. (author)
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(creator_code:org_t)
- 2003
- 2003
- English.
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In: Marine Biology. - 0025-3162. ; 142:2, s. 253-261
- Related links:
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https://gup.ub.gu.se...
Abstract
Subject headings
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- The functional response of the appendicularian Oikopleura dioica was investigated with a unialgal diet (Isochrysis galbana, 0-1,600 mug Cl-1) and with additions of specific concentrations of algae either smaller than the incurrent filter mesh size (Rhodomonas baltica, 90 mug Cl-1; Thalassiosira weissflogii, 60 mug Cl-1) or larger algae (Ceratium lineatum, 8 mug Cl-1; C. tripos, 52 mug C l(-1)). Clearance ranged from 0.13 to 3.3 ml mug C-1 h(-1) and followed a Michaelis-Menten curve corresponding to a maximum filtration rate (particles collected by both animal and house), FRmax = 164 ng C mug C-1 h(-1) and K-m = 64 mug C l(-1). Maximum pellet production was 9 pellets ind(-1) h(-1) and occurred at 100 mugC (-1). Pellet production was proportional to filtration rate below this level, but declined at higher concentrations. House production ranged from 0.5 to 5.5 houses ind(-1) day(-1) and the corresponding curve fit resulted in H-max = 4.6 houses ind(-1) day(-1) and K-m house = 32 mug Cl-1. Addition of edible small algae caused increased internal clogging of the houses, evidenced by significantly higher pigment concentrations in abandoned houses than in houses produced with I.. galbana as a single food. House production was not affected. In contrast, larger algae caused a significantly higher house production, but the algae were not collected on the houses. Increased levels of edible algae will not have negative effects on O. dioica at ecologically realistic concentrations. Ambient bloom concentrations of larger algae may, however, have a negative effect on the growth of O. dioica populations, owing to the compensatory increased house production.
Subject headings
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- appendicularia
- rates
- tunicata
- phytoplankton
- vanhoeffeni
- mechanisms
- impact
- waters
- bloom
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Tiselius, Peter, ...
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Petersen, J. K.
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Nielsen, T. G.
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Maar, M.
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Moller, E. F.
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Satapoomin, S.
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show more...
-
Tonnesson, K.
-
Zervoudaki, T.
-
Christou, E.
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Giannakourou, A.
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Sell, A.
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Vargas, C.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
- Articles in the publication
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Marine Biology
- By the university
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University of Gothenburg