A note on abiotic factors that constrain periphyton growth in alpine glacier streams

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2001
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Robinson, Christopher T.
Uehlinger, Urs
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International Review of Hydrobiology. 2001, 86(3), pp. 361-366. ISSN 0020-9309. eISSN 1522-2632. Available under: doi: 10.1002/1522-2632(200106)86:3<361::AID-IROH361>3.0.CO;2-Z
Zusammenfassung

Periphyton growth limitation experiments were conducted in five glacier streams during the main ice melt period in late summer using nutrient diffusing substrata (NDS) that contained nitrate and/or phosphate. Periphyton net growth was determined as chlorophyll a accrual after an exposure time of 4 weeks. In addition, primary water chemistry and physical parameters of the study streams were measured. These chemical and physical parameters characterised the sites as kryal (glacial) systems. Neither nutrient limitation nor a significant correlation between water chemistry and physical data and chlorophyll a values were apparent. A comparison between current velocity and ln-transformed chlorophyll a values revealed a typical optimum curve with highest periphyton accrual at 0.5 m s–1 on NDS. During the summer ablation period, the net growth of periphyton in these glacial streams appeared to be controlled primarily by current velocity.

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570 Biowissenschaften, Biologie
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glacier streams, periphyton, nutrient limitation, current velocity, nutrient diffusingsubstrata
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ISO 690RINKE, Karsten, Christopher T. ROBINSON, Urs UEHLINGER, 2001. A note on abiotic factors that constrain periphyton growth in alpine glacier streams. In: International Review of Hydrobiology. 2001, 86(3), pp. 361-366. ISSN 0020-9309. eISSN 1522-2632. Available under: doi: 10.1002/1522-2632(200106)86:3<361::AID-IROH361>3.0.CO;2-Z
BibTex
@article{Rinke2001abiot-17748,
  year={2001},
  doi={10.1002/1522-2632(200106)86:3<361::AID-IROH361>3.0.CO;2-Z},
  title={A note on abiotic factors that constrain periphyton growth in alpine glacier streams},
  number={3},
  volume={86},
  issn={0020-9309},
  journal={International Review of Hydrobiology},
  pages={361--366},
  author={Rinke, Karsten and Robinson, Christopher T. and Uehlinger, Urs}
}
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    <dcterms:abstract xml:lang="eng">Periphyton growth limitation experiments were conducted in five glacier streams during the main ice melt period in late summer using nutrient diffusing substrata (NDS) that contained nitrate and/or phosphate. Periphyton net growth was determined as chlorophyll a accrual after an exposure time of 4 weeks. In addition, primary water chemistry and physical parameters of the study streams were measured. These chemical and physical parameters characterised the sites as kryal (glacial) systems. Neither nutrient limitation nor a significant correlation between water chemistry and physical data and chlorophyll a values were apparent. A comparison between current velocity and ln-transformed chlorophyll a values revealed a typical optimum curve with highest periphyton accrual at 0.5 m s–1 on NDS. During the summer ablation period, the net growth of periphyton in these glacial streams appeared to be controlled primarily by current velocity.</dcterms:abstract>
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