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dc.contributor.author
Schmautz, Zala
dc.contributor.supervisor
Frossard, Emmanuel
dc.contributor.supervisor
Smits, Theo H.M.
dc.contributor.supervisor
Junge, Ranka
dc.contributor.supervisor
Kertesz, Michael
dc.date.accessioned
2021-01-22T14:59:16Z
dc.date.available
2021-01-22T14:10:12Z
dc.date.available
2021-01-22T14:59:16Z
dc.date.issued
2020
dc.identifier.uri
http://hdl.handle.net/20.500.11850/464851
dc.identifier.doi
10.3929/ethz-b-000464851
dc.description.abstract
The rapid environmental change during the last years has emphasized the need for new global solutions for food production. However, a substantial increase in food production with a concomitant reduction of its environmental footprint presents a significant challenge and requires the development of nutrient efficient and sustainable strategies. Here, multi-trophic aquaponic systems, which reduce nutrient loss to the environment through the co-cultivation of plants and aquatic animals, may present a solution. These systems consist of various compartments, with each compartment having its own specific function as part of the total system. This compartmentalization of functions creates a range of unique microenvironments, each of which supports the development of a unique microbial community. This high microbial diversity makes aquaponics an attractive soilless model system for the study of nutrient transformation processes. In particular, the nitrogen cycle is of importance, as its disruption is not only detrimental to plant and animal growth but has environment-wide consequences. This dissertation deepens the understanding of aquaponic system-specific nitrogen transformation processes through the characterization of individual interactions in the aquaponic compartments on both a chemical and a microbial level. To this end, next-generation DNA sequencing was used to characterize localized microbial community composition and diversity and was combined with chemical analyses to determine nutrient content and abiotic parameter values. Significant differences in nitrogen composition and abiotic parameters were observed between the individual compartments of the aquaponic system. These differences could be responsible for the unique microenvironments that, in turn, give rise to specific microbial communities and, thus, foster further specialization of compartment function. Notable differences were especially observed between the aerobic and anaerobic compartments regarding archaeal and bacterial composition. While this work investigated both the presence and composition of bacterial and archaeal communities, it also points to the importance of determining their active role in the nitrogen cycle.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
ETH Zurich
en_US
dc.title
Characterization of nitrogen dynamics in an aquaponic system
en_US
dc.type
Doctoral Thesis
dc.date.published
2021-01-22
ethz.size
129 p.
en_US
ethz.code.ddc
DDC - DDC::6 - Technology, medicine and applied sciences::630 - Agriculture
en_US
ethz.identifier.diss
27159
en_US
ethz.publication.place
Zurich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03427 - Frossard, Emmanuel / Frossard, Emmanuel
en_US
ethz.date.deposited
2021-01-22T14:10:19Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Embargoed
en_US
ethz.date.embargoend
2024-01-22
ethz.rosetta.installDate
2021-01-22T14:59:28Z
ethz.rosetta.lastUpdated
2021-02-15T23:30:35Z
ethz.rosetta.versionExported
true
ethz.COinS
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