Cyanobacteria-derived nitrogen uptake by benthic invertebrates in Lake Taihu: a mesocosm study using 15N labeling
Eutrophication of lakes can lead to dominance by cyanobacteria, which are hardly used by zooplankton due to their low nutrition value. However, sedimented cyanobacterial detritus may be a useful source for benthic invertebrates. We studied the Microcystis-derived nitr...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2014-01-01
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| Series: | Knowledge and Management of Aquatic Ecosystems |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1051/kmae/2014033 |
| _version_ | 1818057058329559040 |
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| author | Yu J. He H. Liu Z. Li K. Hu Y. Zhong P. Jeppesen E. |
| author_facet | Yu J. He H. Liu Z. Li K. Hu Y. Zhong P. Jeppesen E. |
| author_sort | Yu J. |
| collection | DOAJ |
| description | Eutrophication of lakes can lead to dominance by cyanobacteria, which are hardly used by
zooplankton due to their low nutrition value. However, sedimented cyanobacterial detritus
may be a useful source for benthic invertebrates. We studied the
Microcystis-derived nitrogen incorporation in benthic invertebrates in
Lake Taihu using stable isotopic nitrogen (15N) as a tracer. The δ15N of all
organisms increased significantly with time after addition of the labeled
Microcystis detritus. δ15N values of POM and periphyton peaked
earlier than for benthic invertebrates, and the maximum levels were also higher than
bivalves, snails and worms (Limnodrilus spp.). Among benthic
invertebrates, Radix swinhoei peaked later than other invertebrates, but
the maximum level and the excess 15N of the last sampling day were higher. At the end of the
experiment, approximately 70% of the added 15N was retained in the benthic food web, while only a
small fraction (less than 1%) of the added detritus 15N occurred in the pelagic food
web. Our results suggest that nitrogen from cyanobacteria can be incorporated more in
benthic than pelagic food webs and cyanobacterial blooms may contribute to the development
of benthic animals. |
| first_indexed | 2024-12-10T12:38:42Z |
| format | Article |
| id | doaj.art-3acc4f02fc6b488db2145996536a9fc7 |
| institution | Directory Open Access Journal |
| issn | 1961-9502 |
| language | English |
| last_indexed | 2024-12-10T12:38:42Z |
| publishDate | 2014-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Knowledge and Management of Aquatic Ecosystems |
| spelling | doaj.art-3acc4f02fc6b488db2145996536a9fc72022-12-22T01:48:35ZengEDP SciencesKnowledge and Management of Aquatic Ecosystems1961-95022014-01-0104150710.1051/kmae/2014033kmae140092Cyanobacteria-derived nitrogen uptake by benthic invertebrates in Lake Taihu: a mesocosm study using 15N labelingYu J.He H.0Liu Z.Li K.1Hu Y.2Zhong P.3Jeppesen E.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of SciencesState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of SciencesState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of SciencesDepartment of Ecology and Institute of Hydrobiology, Jinan UniversityEutrophication of lakes can lead to dominance by cyanobacteria, which are hardly used by zooplankton due to their low nutrition value. However, sedimented cyanobacterial detritus may be a useful source for benthic invertebrates. We studied the Microcystis-derived nitrogen incorporation in benthic invertebrates in Lake Taihu using stable isotopic nitrogen (15N) as a tracer. The δ15N of all organisms increased significantly with time after addition of the labeled Microcystis detritus. δ15N values of POM and periphyton peaked earlier than for benthic invertebrates, and the maximum levels were also higher than bivalves, snails and worms (Limnodrilus spp.). Among benthic invertebrates, Radix swinhoei peaked later than other invertebrates, but the maximum level and the excess 15N of the last sampling day were higher. At the end of the experiment, approximately 70% of the added 15N was retained in the benthic food web, while only a small fraction (less than 1%) of the added detritus 15N occurred in the pelagic food web. Our results suggest that nitrogen from cyanobacteria can be incorporated more in benthic than pelagic food webs and cyanobacterial blooms may contribute to the development of benthic animals.http://dx.doi.org/10.1051/kmae/2014033Microcystis detritusBenthic invertebratesnitrogenlabeling experimentfood web |
| spellingShingle | Yu J. He H. Liu Z. Li K. Hu Y. Zhong P. Jeppesen E. Cyanobacteria-derived nitrogen uptake by benthic invertebrates in Lake Taihu: a mesocosm study using 15N labeling Knowledge and Management of Aquatic Ecosystems Microcystis detritus Benthic invertebrates nitrogen labeling experiment food web |
| title | Cyanobacteria-derived nitrogen uptake by benthic invertebrates
in Lake Taihu: a mesocosm study using 15N labeling |
| title_full | Cyanobacteria-derived nitrogen uptake by benthic invertebrates
in Lake Taihu: a mesocosm study using 15N labeling |
| title_fullStr | Cyanobacteria-derived nitrogen uptake by benthic invertebrates
in Lake Taihu: a mesocosm study using 15N labeling |
| title_full_unstemmed | Cyanobacteria-derived nitrogen uptake by benthic invertebrates
in Lake Taihu: a mesocosm study using 15N labeling |
| title_short | Cyanobacteria-derived nitrogen uptake by benthic invertebrates
in Lake Taihu: a mesocosm study using 15N labeling |
| title_sort | cyanobacteria derived nitrogen uptake by benthic invertebrates in lake taihu a mesocosm study using 15n labeling |
| topic | Microcystis detritus Benthic invertebrates nitrogen labeling experiment food web |
| url | http://dx.doi.org/10.1051/kmae/2014033 |
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