Hydraulic Coupling of a Leafless Kauri Tree Remnant to Conspecific Hosts

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aut.relation.journaliScienceen_NZ
aut.researcherBader, Martin
dc.contributor.authorBader, MK-Fen_NZ
dc.contributor.authorLeuzinger, Sen_NZ
dc.date.accessioned2019-08-02T02:00:10Z
dc.date.available2019-08-02T02:00:10Z
dc.date.copyright2019-07en_NZ
dc.date.issued2019-07en_NZ
dc.description.abstractSUMMARY Trees are commonly regarded as distinct entities, but the roots of many species fuse to form natural root grafts allowing the exchange of water, carbon, mineral nutrients, and microorganisms between individuals. Exploiting the phenomenon of leafless (photosynthetically inactive) tree remnants being kept alive by conspecifics, we show tight physiological coupling of a living kauri (Agathis australis) stump to conspecific neighbors. The trunk remnant displayed greatly reduced, inverted daily sap flow patterns compared with intact kauri trees. Its stem water potential showed strong diel variation with minima during daytime and maxima at night, coinciding with peak and minimal sap flow rates in neighbors, respectively. Sudden atmospherically driven changes in water relations in adjacent kauri trees were very rapidly and inversely mirrored in the living stump’s water status. Such intimate hydrological coupling suggests a ‘communal physiology’’ among (conspecific) trees with far-reaching implications for our understanding of forest functioning, particularly under water shortage.
dc.identifier.citationiScience (2019), https://doi.org/10.1016/j.isci.2019.05.009
dc.identifier.doi10.1016/j.isci.2019.05.009en_NZ
dc.identifier.issn2589-0042en_NZ
dc.identifier.urihttps://hdl.handle.net/10292/12713
dc.languageenen_NZ
dc.publisherElsevier BVen_NZ
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S2589004219301464?via%3Dihub
dc.rightsThis is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
dc.rights.accessrightsOpenAccessen_NZ
dc.titleHydraulic Coupling of a Leafless Kauri Tree Remnant to Conspecific Hostsen_NZ
dc.typeJournal Article
pubs.elements-id362536
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Health & Environmental Science
pubs.organisational-data/AUT/Health & Environmental Science/Applied Science
pubs.organisational-data/AUT/Health & Environmental Science/School of Science
pubs.organisational-data/AUT/PBRF
pubs.organisational-data/AUT/PBRF/PBRF Health and Environmental Sciences
pubs.organisational-data/AUT/PBRF/PBRF Health and Environmental Sciences/HA Science 2018 PBRF
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