TY - JOUR
T1 - Specific growth rates of heterotrophic plankton organisms in a eutrophic lake during a spring bloom
AU - Hansen, Benni
AU - Christoffersen, Kirsten
N1 - Funding Information:
providing chlorophyll and primary production data. We are grateful to T.Ki0rboe for comments on the manuscript, and to S.Christiansen, H.Melby and N.Willumsen for technical assistance. This study was supported by the Danish Natural Science Research Council project no. 118348.
PY - 1995/2
Y1 - 1995/2
N2 - The in situ growth of the dominating pelagic organisms at several trophic levels was investigated during a spring bloom characterized by well-mixed cold water. The study includes primary production and the carbon flow through the nano-, micro- and mesozooplankton populations based on population dynamics and specific growth rates. The phytoplankton biomass and production were totally dominated by small algae <20 μm. of which ̃5% were <3μm. potentially a food source for the nano- and microzooplankton. The mean carbon-specific primary production was 0.15 day-1 and was regulated solely by light. The mean volume-based specific growth rate of bacterioplankton was modest. 0.1 day-1. and probably controlled by the low temperature. The volume-based specific growth rates of heterotrophic nanoflagellates. ciliates. rotifers and copepods were 0.35. 0.13. 0.16 and 0.03 day-1, respectively. The observed growth of the heterotrophic plankton was generally not food limited, but was controlled by temperature. The stable temperature during the experiment therefore allows a cross-taxonomic comparison of specific growth rates. The b exponent in the allometric relationship (G = aVth) between volume-specific growth rate (G) and individual body size (V) was -0.15 ± 0.03 for all filtrating zooplankton. indicating an in situ scaling not far from the physiological principles onginally demonstrated for laboratory populations.
AB - The in situ growth of the dominating pelagic organisms at several trophic levels was investigated during a spring bloom characterized by well-mixed cold water. The study includes primary production and the carbon flow through the nano-, micro- and mesozooplankton populations based on population dynamics and specific growth rates. The phytoplankton biomass and production were totally dominated by small algae <20 μm. of which ̃5% were <3μm. potentially a food source for the nano- and microzooplankton. The mean carbon-specific primary production was 0.15 day-1 and was regulated solely by light. The mean volume-based specific growth rate of bacterioplankton was modest. 0.1 day-1. and probably controlled by the low temperature. The volume-based specific growth rates of heterotrophic nanoflagellates. ciliates. rotifers and copepods were 0.35. 0.13. 0.16 and 0.03 day-1, respectively. The observed growth of the heterotrophic plankton was generally not food limited, but was controlled by temperature. The stable temperature during the experiment therefore allows a cross-taxonomic comparison of specific growth rates. The b exponent in the allometric relationship (G = aVth) between volume-specific growth rate (G) and individual body size (V) was -0.15 ± 0.03 for all filtrating zooplankton. indicating an in situ scaling not far from the physiological principles onginally demonstrated for laboratory populations.
UR - http://www.scopus.com/inward/record.url?scp=0028992465&partnerID=8YFLogxK
U2 - 10.1093/plankt/17.2.413
DO - 10.1093/plankt/17.2.413
M3 - Journal article
AN - SCOPUS:0028992465
VL - 17
SP - 413
EP - 430
JO - Journal of Plankton Research
JF - Journal of Plankton Research
SN - 0142-7873
IS - 2
ER -