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dc.contributor.author
Käslin, Florian
dc.contributor.author
Bauer, Thomas
dc.contributor.author
Meier, Philip
dc.contributor.author
Koller, Patrick
dc.contributor.author
Buchmann, Nina
dc.contributor.author
D'Odorico, Petra
dc.contributor.author
Eugster, Werner
dc.date.accessioned
2018-11-14T16:37:04Z
dc.date.available
2018-10-30T13:16:34Z
dc.date.available
2018-10-31T09:26:09Z
dc.date.available
2018-11-14T16:37:04Z
dc.date.issued
2018-10-18
dc.identifier.other
10.3389/ffgc.2018.00002
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/299733
dc.identifier.doi
10.3929/ethz-b-000299733
dc.description.abstract
Biophysical and biochemical traits of foliage and twigs at the top of tree canopies provide essential information on trees' ecophysiology. Conventional methods used for canopy sampling are typically time consuming and costly, while the very canopy tops are still out of reach unless a canopy crane is used. Thus, we developed a novel twig sampling method using a device attached to a drone that allows to grasp and cut small twigs and bring them to the ground for immediate analysis. This “Flying Tree Top Sampler” (FTTS) complements existing methods used in tree canopy research. This paper describes the method to make it openly available to interested users, provides the necessary technical details, and reports on a proof-of-concept application by probing a single tree during senescence. In this demonstration example we show that the ability to investigate the top part of the tree leads to the clear finding that chlorophyll content of the top leaves is significantly lower than that of leaves in the lower canopy. Without the samples collected by the FTTS, the decrease of chlorophyll content with height would not have been of statistical significance using a p = 0.05 significance threshold. Besides its advantages, the existing limitations of the FTTS are discussed, and suggestions for future developments are provided.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Frontiers
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Tree canopy sampling
en_US
dc.subject
Leaf sample collection
en_US
dc.subject
Ground truthing
en_US
dc.subject
Leaf physiological measurements
en_US
dc.subject
Leaf chlorophyll
en_US
dc.subject
Tree senescence
en_US
dc.subject
Unmanned aerial vehicle
en_US
dc.title
Novel twig sampling method by unmanned aerial vehicle (UAV)
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Frontiers in Forests and Global Change
ethz.journal.volume
1
en_US
ethz.pages.start
2
en_US
ethz.size
6 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.publication.place
Lausanne
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::03648 - Buchmann, Nina / Buchmann, Nina
en_US
ethz.leitzahl.certified
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::03648 - Buchmann, Nina / Buchmann, Nina
en_US
ethz.date.deposited
2018-10-30T13:16:36Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-10-31T09:26:15Z
ethz.rosetta.lastUpdated
2018-11-14T16:37:17Z
ethz.rosetta.versionExported
true
ethz.COinS
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