10.5061/DRYAD.482M400
Hall, Sharon J.
Arizona State University
Huber, David P.
Agricultural Research Service
Hughes, R. Flint
Pacific Southwest Research Station
Data from: Invasion of Hawaiian rainforests by an introduced amphibian
predator and N2-fixing tree increases soil N2O emissions
Dryad
dataset
2019
June-August 2006
Nitric oxide
nitrous oxide
N-oxide
Trophic
Metrosideros polymorpha
Nitrification
Falcataria moluccana
Albizia
Eleutherodactylus coqui
N trace gas
2019-07-23T00:00:00Z
2019-07-23T00:00:00Z
en
https://doi.org/10.1002/ecs2.2416
118394 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Invasions of introduced species have homogenized ecological communities
worldwide, leading to losses of native species and the services they
provide. Some of these invaders substantially alter nutrient cycling,
which changes conditions for all other organisms, but less is known about
the potential influence of these species on nitrogen (N) trace gas
emissions that affect atmospheric processes. We used a natural experiment
to explore whether the establishment of an introduced nitrogen (N) fixing
tree (Falcataria moluccana) and recent invasion of an amphibian predator,
the Caribbean tree frog (Eleutherodactylus coqui), into native Hawaiian
rainforests has affected soil emissions of nitrous oxide (N2O) and nitric
oxide (NO), two atmospherically important trace gases produced by soil
microorganisms. Soil N2O and NO emissions and rates of soil N cycling were
significantly higher in F. moluccana-dominated stands compared to native
Metrosideros polymorpha (Ohi’a) stands. Additionally, invasion of E. coqui
frogs moderately increased soil N2O emissions, primarily in non-native F.
moluccana forests where soil N availability was already elevated. N2O
emissions were positively and significantly related to net potential N
mineralization, and total N2O+NO fluxes increased with soil nitrate (NO3-)
concentration and rates of nitrification. Previous work in these Hawaiian
rainforest sites has shown that F. moluccana substantially increases N
availability by increasing ecosystem N supply compared to uninvaded
stands, and E. coqui accelerates N availability and litter decomposition,
although moderately, due to enhanced fluxes of nutrient-rich waste
products. Here, we show that acceleration of nutrient cycling by
introduced species can also alter biosphere-atmosphere exchange of
N-oxides.
AlbiziaCoqui_GasesN2O and NO gas data used in Hall, Huber, and Hughes (in
press). Invasion of Hawaiian rainforests by an introduced amphibian
predator and N2-fixing tree increases soil N2O emissions.
EcosphereCoquiAlbizia_SoilsSoils data used in Hall, Huber, and Hughes.
Invasion of Hawaiian rainforests by an introduced amphibian predator and
N2-fixing tree increases soil N2O emissions. Ecosphere, in press.
HI
USA
Eastern Hawai'i Island