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|a (JST)27798963
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a de Tezanos Pinto, Paula
|e verfasserin
|4 aut
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| 245 |
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|a Interactive effects of N:P ratios and light on nitrogen-fixer abundance
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a Computermedien
|b c
|2 rdamedia
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|a Online-Ressource
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|2 rdacarrier
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|a Nitrogen-fixers can contribute significant amounts of nitrogen (N) and impact ecosystem functioning in diverse aquatic and terrestrial ecosystems. What determines N-fixer abundance still remains poorly understood. Here we experimentally investigate major environmental controls on the abundance of N-fixers: nitrogen to phosphorus (N:P) ratio and light. We grew a N-fixer, cyanobacterium Anabaena flos-aquae, in a multispecies community of freshwater phytoplankton in replicated factorial design treatments with two N:P ratios and two light levels. We show that low N:P ratios promote the dominance of the N-fixer in the community, but only under high light. Under low light, N:P ratio did not have a significant effect on the abundance of the N-fixer. N fixation occurred at low N:P only and increased with increasing light. In contrast, the density of non N-fixing cyanobacteria did not depend on N:P ratios. Green algae dominated under high N:P and high light only, exhibiting the opposite pattern of dominance to N-fixers. These results are consistent with patterns observed in nature and help explain the N-fixer distribution along the environmental gradients of nutrients and light.
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|a © 2010 Oikos
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Botany
|x Marine botany
|x Phycology
|x Algae
|x Cyanobacteria
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| 650 |
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4 |
|a Biological sciences
|x Ecology
|x Biomass
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Marine biology
|x Aquatic organisms
|x Plankton
|x Phytoplankton
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| 650 |
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4 |
|a Physical sciences
|x Chemistry
|x Chemical elements
|x Nitrogen
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| 650 |
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4 |
|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Bodies of water
|x Lakes
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| 650 |
|
4 |
|a Biological sciences
|x Biology
|x Botany
|x Marine botany
|x Phycology
|x Algae
|x Green algae
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| 650 |
|
4 |
|a Biological sciences
|x Ecology
|x Population ecology
|x Synecology
|x Biocenosis
|x Aquatic communities
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| 650 |
|
4 |
|a Biological sciences
|x Ecology
|x Ecological processes
|x Ecological competition
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| 650 |
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4 |
|a Physical sciences
|x Chemistry
|x Chemical elements
|x Phosphorus
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| 650 |
|
4 |
|a Physical sciences
|x Earth sciences
|x Hydrology
|x Limnology
|x Surface water
|x Fresh water
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| 655 |
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4 |
|a research-article
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| 700 |
1 |
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|a Litchman, Elena
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Oikos
|d Nordic Society Oikos, 1949
|g 119(2010), 3, Seite 567-575
|w (DE-627)614095107
|w (DE-600)2526963-X
|x 16000706
|7 nnas
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| 773 |
1 |
8 |
|g volume:119
|g year:2010
|g number:3
|g pages:567-575
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| 856 |
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|u http://dx.doi.org/10.1111/j.1600-0706.2009.17924.x
|3 Volltext
|7 1
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|d 119
|j 2010
|e 3
|h 567-575
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