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Persistent reduced ecosystem respiration after insect disturbance in high elevation forests

Author(s):

David J. P. Moore
Nicole A. Trahan
Phil Wilkes
Tristan Quaife
Britton B. Stephens
Ankur R. Desai
Russell K. Monson

Year:

2013

Publication type:

Scientific Journal (JRNL)

Primary Station(s):

Rocky Mountain Research Station

Source:

Ecology Letters. 16: 731-737.

Description

Amid a worldwide increase in tree mortality, mountain pine beetles (Dendroctonus ponderosae Hopkins) have led to the death of billions of trees from Mexico to Alaska since 2000. This is predicted to have important carbon, water and energy balance feedbacks on the Earth system. Counter to current projections, we show that on a decadal scale, tree mortality causes no increase in ecosystem respiration from scales of several square metres up to an 84 km2 valley. Rather, we found comparable declines in both gross primary productivity and respiration suggesting little change in net flux, with a transitory recovery of respiration 6-7 years after mortality associated with increased incorporation of leaf litter C into soil organic matter, followed by further decline in years 8-10. The mechanism of the impact of tree mortality caused by these biotic disturbances is consistent with reduced input rather than increased output of carbon.

Citation

Moore, David J. P.; Trahan, Nicole A.; Wilkes, Phil; Quaife, Tristan; Stephens, Britton B.; Elder, Kelly; Desai, Ankur R.; Negron, Jose; Monson, Russell K. 2013. Persistent reduced ecosystem respiration after insect disturbance in high elevation forests. Ecology Letters. 16: 731-737.

Publication Notes

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https://www.fs.usda.gov/treesearch/pubs/43812