10.5061/DRYAD.J146P05
Piper, Frida I.
Patagonian Ecosystems Investigation Research Center
Gundale, Michael J.
Swedish University of Agricultural Sciences
Fuenzalida, Tomás
Australian National University
Fajardo, Alex
Patagonian Ecosystems Investigation Research Center
Data from: Herbivore resistance in congeneric and sympatric Nothofagus
species is not related to leaf habit
Dryad
dataset
2019
Nothofagus betuloides
Polyphenols
Secondary metabolites
Nothofagus antarctica
Carbon-based defences
outbreaks
tannins
Leaf traits
Ormiscodes amphimone
Nothofagus pumilio
2019-05-29T18:14:48Z
2019-05-29T18:14:48Z
en
https://doi.org/10.1002/ajb2.1293
32501 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Premise of the study Two fundamental hypotheses on herbivore resistance
and leaf habit are the resource availability hypothesis (RAH) and the
carbon-nutrient balance hypothesis (CNBH). The RAH predicts higher
constitutive resistance by evergreens and the CNBH predicts higher induced
resistance by deciduous species. Although support for these hypotheses is
mixed, they have rarely been examined in congeneric species. Methods We
compared leaf constitutive and induced resistance (as leaf polyphenols and
tannin concentrations, and damage level in non-choice experiments) and
leaf traits associated with herbivory of coexisting Nothofagus species
using 1) a defoliation experiment, and 2) a natural defoliation caused by
an outbreak of a common defoliator of Nothofagus species. Key Results In
the defoliation experiment, polyphenol and tannin concentrations were
similar between deciduous and evergreen species; regardless of leaf habit,
polyphenols increased in response to defoliation. In the natural
defoliation survey, N. pumilio (deciduous) had significantly higher
herbivory, lower C/N ratio and leaf mass per area, and higher nitrogen and
phosphorous concentrations than N. betuloides (evergreen); N. antarctica
(deciduous) had intermediate values. Polyphenol concentrations and
herbivore resistance indicated by the non-choice experiment were lower in
N. pumilio than in N. antarctica and N. betuloides, which had similar
values. Conclusions Higher herbivory in N. pumilio was associated with a
higher nutritional value and a lower level of leaf C-based defenses
compared to both the evergreen and the other deciduous species, indicating
that herbivore resistance in Nothofagus species cannot be attributed to
only leaf habit as predicted by the RAH or CNBH. Please be aware that if
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leaf C based defences experiment DryadLeaf concentrations of total
polyphenols and tannins in juvenile trees of Nothofagus pumilio and N.
betuloides subjected to three levels of defoliation during three
years.Dryad data on field studyLeaf traits (N, P, NSC, polyphenols, C/N
and humidity), field herbivory, and relative consumption rate by
Ormiscodes amphimone in non choice experiments of Nothofagus pumilio, N.
antarctica and N. betuloides in Patagonia; relative consumption rate by
Ormiscodes amphimone in non choice experiments with foliage of N. pumilio
and N. antarctica from stands with and without ongoing outbreaks.
Aysen
Chile