NDLI: Potamoplankton and primary productivity in the River Danube

Content Provider	Springer Nature Link
Author	Dokulil, Martin T.
Copyright Year	2013
Abstract	Autochthonous production of potamoplankton has recently attracted greater interest as it was incorporated into expanded river concepts such as the flow pulse concept or the riverine productivity model (RPM). This review assembles data on primary production from the River Danube to evaluate the importance of productivity in large rivers. Results indicate positive net production in the middle reach of the river and in impoundments. These sections are characterised by favourable conditions for algal growth. Reduction in flow, reduced concentrations of suspended solids and improved under-water light result in significant increase in plankton biomass. Maximum chlorophyll concentrations were below 20 mg m−3 in 2007 but concentrations up to 130 mg m−3 have been recorded in the past. Since nutrients are not limiting, as in most large rivers, net primary production is largely controlled by availability of photosynthetic active radiation under water, chlorophyll-a, water depth and discharge. Hourly carbon uptake rates of 3–130 mg C m−3 h−1 observed in the Danube are well within the range of 0–790 mg C m−3 h−1 for large rivers of the world. Autochthonous autotrophic production must be regarded as an important feature of large rivers supporting the RPM concept.
Starting Page	209
Ending Page	227
Page Count	19
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	729
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer International Publishing
Publisher Date	2013-06-14
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Review Phytoplankton Species composition Photosynthetic rates Environmental control Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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