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Integrated trophic position decreases in more diverse communities of stream food webs
- Source :
- Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017), Scientific Reports, Scientific Reports, 7
- Publication Year :
- 2017
- Publisher :
- ETH Zurich, 2017.
-
Abstract
- The relationship between biodiversity and ecosystem functioning is an important theme in environmental sciences. We propose a new index for configuration of the biomass pyramid in an ecosystem, named integrated trophic position (iTP). The iTP is defined as a sum of trophic positions (i.e. the average number of steps involved in biomass transfer) of all the animals in a food web integrated by their individual biomass. The observed iTP for stream macroinvertebrates ranged from 2.39 to 2.79 and was negatively correlated with the species density and the Shannon–Wiener diversity index of the local community. The results indicate a lower efficiency of biomass transfer in more diverse communities, which may be explained by the variance in edibility hypothesis and/or the trophic omnivory hypothesis. We found a negative effect of biodiversity on ecosystem functioning.<br />Scientific Reports, 7<br />ISSN:2045-2322
- Subjects :
- 0106 biological sciences
Food Chain
Stable isotope analysis
Ecological pyramid
Science
Biodiversity
Biology
010603 evolutionary biology
01 natural sciences
Article
Food chain
Rivers
Animals
Ecosystem
Biomass
Trophic level
Isotope analysis
Biomass (ecology)
Multidisciplinary
Ecology
010604 marine biology & hydrobiology
Food webs
Models, Theoretical
Invertebrates
Food web
Medicine
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Database :
- OpenAIRE
- Journal :
- Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017), Scientific Reports, Scientific Reports, 7
- Accession number :
- edsair.doi.dedup.....2350e83173ff4b59e2dc5ac93b41746a
- Full Text :
- https://doi.org/10.3929/ethz-b-000191642