TY - JOUR
T1 - Elevated CO 2 interacts with herbivory to alter chlorophyll fluorescence and leaf temperature in Betula papyrifera and Populus tremuloides
AU - Nabity, Paul D.
AU - Hillstrom, Michael L.
AU - Lindroth, Richard L.
AU - DeLucia, Evan H.
N1 - Funding Information:
Acknowledgments We thank the members of the DeLucia Laboratory for constructive remarks on an earlier version of this manuscript. We thank the University of Illinois Dissertation Travel Grant for providing travel support to and from Rhinelander, WI, USA, in 2009. Aspen FACE is principally supported by the Office of Science (BER), US Department of Energy, grant no. DE-FG02-95ER62125 to Michigan Technological University, and contract no. DE-AC02-98CH10886 to Brookhaven National Laboratory, the US Forest Service Northern Global Change Program and North Central Research Station, Michigan Technological University, and Natural Resources Canada—Canadian Forest Service. This work was supported by a US Department of Energy (Office of Science, BER) grant (DE-FG02-06ER64232) to E. H. DeLucia and a University of Wisconsin hatch grant (WIS04898) to R. L. Lindroth.
PY - 2012/8
Y1 - 2012/8
N2 - Herbivory can influence ecosystem productivity, but recent evidence suggests that damage by herbivores modulates potential productivity specific to damage type. Because productivity is linked to photosynthesis at the leaf level, which in turn is influenced by atmospheric CO 2 concentrations, we investigated how different herbivore damage types alter component processes of photosynthesis under ambient and elevated atmospheric CO 2. We examined spatial patterns in chlorophyll fluorescence and the temperature of leaves damaged by leaf-chewing, gall-forming, and leaf-folding insects in aspen trees as well as by leaf-chewing insects in birch trees under ambient and elevated CO 2 at the aspen free-air CO 2 enrichment (FACE) site in Wisconsin. Both defoliation and gall damage suppressed the operating efficiency of photosystem II (ΦPSII) in remaining leaf tissue, and the distance that damage propagated into visibly undamaged tissue was marginally attenuated under elevated CO 2. Elevated CO 2 increased leaf temperatures, which reduced the cooling effect of gall formation and freshly chewed leaf tissue. These results provide mechanistic insight into how different damage types influence the remaining, visibly undamaged leaf tissue, and suggest that elevated CO 2 may reduce the effects of herbivory on the primary photochemistry controlling photosynthesis.
AB - Herbivory can influence ecosystem productivity, but recent evidence suggests that damage by herbivores modulates potential productivity specific to damage type. Because productivity is linked to photosynthesis at the leaf level, which in turn is influenced by atmospheric CO 2 concentrations, we investigated how different herbivore damage types alter component processes of photosynthesis under ambient and elevated atmospheric CO 2. We examined spatial patterns in chlorophyll fluorescence and the temperature of leaves damaged by leaf-chewing, gall-forming, and leaf-folding insects in aspen trees as well as by leaf-chewing insects in birch trees under ambient and elevated CO 2 at the aspen free-air CO 2 enrichment (FACE) site in Wisconsin. Both defoliation and gall damage suppressed the operating efficiency of photosystem II (ΦPSII) in remaining leaf tissue, and the distance that damage propagated into visibly undamaged tissue was marginally attenuated under elevated CO 2. Elevated CO 2 increased leaf temperatures, which reduced the cooling effect of gall formation and freshly chewed leaf tissue. These results provide mechanistic insight into how different damage types influence the remaining, visibly undamaged leaf tissue, and suggest that elevated CO 2 may reduce the effects of herbivory on the primary photochemistry controlling photosynthesis.
KW - Climate change
KW - FACE
KW - Photosynthesis
KW - Plant-insect interactions
KW - Thermography
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U2 - 10.1007/s00442-012-2261-8
DO - 10.1007/s00442-012-2261-8
M3 - Article
C2 - 22358995
AN - SCOPUS:84864287717
SN - 0029-8549
VL - 169
SP - 905
EP - 913
JO - Oecologia
JF - Oecologia
IS - 4
ER -