Ecophysiological responses of native invasive woody Juniperus virginiana L. to resource availability and stand characteristics in the semiarid grasslands of the Nebraska Sandhills

Title:

Ecophysiological responses of native invasive woody Juniperus virginiana L. to resource availability and stand characteristics in the semiarid grasslands of the Nebraska Sandhills

Creator:

Msanne, J., Awada, T., Bryan, N. M., Schacht, W., Drijber, R., Li, Y., Zhou, X., Okalebo, J., Wedin, D., Brandle, J., and Hiller, J.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:28da3d10-cdfa-41b1-be07-20413f2c2c79
uuid:28da3d10-cdfa-41b1-be07-20413f2c2c79
issn:0300-3604
doi:10.1007/s11099-016-0683-y

Subject:

fluorescence, karboxylační rychlost, východní červený cedr, transport elektronů, výměna plynu, půdní živiny, jalovec viržinský, carboxylation velocity, eastern red cedar, electron transport, gas exchange, isotope ratio, soil nutrients, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Vegetation in grasslands is changing at an unprecedented rate. In the Nebraska Sandhills, this shift is attributed in part to encroachment of the woody species Juniperus virginiana. We investigated changes in resource availability and their feedback on seasonal trends in photosynthetic characteristics of J. virginiana trees scattered in open grasslands vs. a dense 57-year-old stand. Dense stand exhibited lower volumetric soil water content, NH4+, NO3-, and δ13C, as well as foliage δ13C, δ15N, and N content, compared to grasslands. Water potential was higher in trees in grasslands compared to dense stand. J. virginiana in dense stand exhibited similar trends to trees in grasslands for net photosynthetic rate (PN), stomatal conductance, transpiration, maximum photochemical efficiency of PSII, maximum carboxylation velocity, and maximum rate of electron transport. PN peaked early summer and declined in the fall, with trees in open grasslands lagging behind those in dense stand. Plasticity of this species may place it at a competitive advantage in the Sandhills, further altering grasslands vegetation and ecosystem processes., J. Msanne, T. Awada, N. M. Bryan, W. Schacht, R. Drijber, Y. Li, X. Zhou, J. Okalebo, D. Wedin, J. Brandle, J. Hiller., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

219-230

Source:

Photosynthetica | 2017 Volume:55 | Number:2

Harvested from:

CDK

Metadata only:

false