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

Msanne, Joseph; Awada, Tala; Bryan, Neal M.; Schacht, Walter H.; Drijber, Rhae A.; Li, Y.; Zhou, Xinhua; Okalebo, Jane; Wedin, David A.; Brandle, James R.; Hiller, Jeremy

doi:10.1007/s11099-016-0683-y

Cited by 20 publications

(12 citation statements)

References 65 publications

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“…On the other hand, in the pluvial year of 2007, the increases of GPP and ET in PG were similar to or greater than those in JEG (Figure 2), which resulted in smaller differences of GPP and ET between JEG and PG ( Figure 4). Eastern redcedar is a species tolerant to drought (Msanne et al, 2017) and can maintain photosynthesis at low water potentials (Eggemeyer, Awada, Wedin, Harvey, & Zhou, 2006;Willson, Manos, & Jackson, 2008). Eastern redcedar is a species tolerant to drought (Msanne et al, 2017) and can maintain photosynthesis at low water potentials (Eggemeyer, Awada, Wedin, Harvey, & Zhou, 2006;Willson, Manos, & Jackson, 2008).…”

Section: Interpretations For Annual and Seasonal Dynamics Of The Chmentioning

confidence: 99%

“…Thus, the change ratios of GPP and ET were low in the pluvial condition than those of drought condition. Under low water availability, eastern redcedar can access the deep soil water and their roots can reach a depth of up to 7 m (Msanne et al, 2017). Under low water availability, eastern redcedar can access the deep soil water and their roots can reach a depth of up to 7 m (Msanne et al, 2017).…”

Section: Interpretations For Annual and Seasonal Dynamics Of The Chmentioning

confidence: 99%

“…Thus, the change ratios of GPP and ET were low in the pluvial condition than those of drought condition. Eastern redcedar is a species tolerant to drought (Msanne et al, 2017) and can maintain photosynthesis at low water potentials (Eggemeyer, Awada, Wedin, Harvey, & Zhou, 2006;Willson, Manos, & Jackson, 2008). Under low water availability, eastern redcedar can access the deep soil water and their roots can reach a depth of up to 7 m (Msanne et al, 2017).…”

Section: Interpretations For Annual and Seasonal Dynamics Of The Chmentioning

confidence: 99%

“…Over the past century, woody plants have been observed worldwide to be increasing in abundance and density in grasslands and savannas, a process termed "woody plant encroachment" (WPE; Archer, Vavra, Laycock, & Pieper, 1994;Archer, 2010;Scott, Jenerette, Potts, & Huxman, 2009). Ecological succession of grasslands to woodlands may alter ecosystem structure and function and can threaten ecosystem services (Msanne et al, 2017;Petrie, Collins, Swann, Ford, & Litvak, 2015). For example, an increase of woody plants in grasslands has been reported to alter animal habitats (Coppedge, Engle, Masters, & Gregory, 2004) and reduce biological diversity (Ratajczak, Nippert, & Collins, 2012;Van Els, Will, Palmer, & Hickman, 2010), forage, and livestock production (Anadon, Sala, Turner, & Bennett, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Enhanced gross primary production and evapotranspiration in juniper‐encroached grasslands

Wang

Xiao

Zhang

et al. 2018

Global Change Biology

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Woody plant encroachment (WPE) into grasslands has been occurring globally and may be accelerated by climate change in the future. This land cover change is expected to alter the carbon and water cycles, but it remains uncertain how and to what extent the carbon and water cycles may change with WPE into grasslands under current climate. In this study, we examined the difference of vegetation indices (VIs), evapotranspiration (ET), gross primary production (GPP), and solar-induced chlorophyll fluorescence (SIF) during 2000-2010 between grasslands and juniper-encroached grasslands. We also quantitatively assessed the changes of GPP and ET for grasslands with different proportions of juniper encroachment (JWPE). Our results suggested that JWPE increased the GPP, ET, greenness-related VIs, and SIF of grasslands. Mean annual GPP and ET were, respectively, ~55% and ~45% higher when grasslands were completely converted into juniper forests under contemporary climate during 2000-2010. The enhancement of annual GPP and ET for grasslands with JWPE varied over years ranging from about +20% GPP (~+30% for ET) in the wettest year (2007) to about twice as much GPP (~+55% for ET) in the severe drought year (2006) relative to grasslands without encroachment. Additionally, the differences in GPP and ET showed significant seasonal dynamics. During the peak growing season (May-August), GPP and ET for grasslands with JWPE were ~30% and ~40% higher on average. This analysis provided insights into how and to what degree carbon and water cycles were impacted by JWPE, which is vital to understanding how JWPE and ecological succession will affect the regional and global carbon and water budgets in the future.

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Section: Interpretations For Annual and Seasonal Dynamics Of The Chmentioning

confidence: 99%

Section: Interpretations For Annual and Seasonal Dynamics Of The Chmentioning

confidence: 99%

Section: Interpretations For Annual and Seasonal Dynamics Of The Chmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced gross primary production and evapotranspiration in juniper‐encroached grasslands

Wang

Xiao

Zhang

et al. 2018

Global Change Biology

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“…Improving our understanding of how invasive species interact and respond to changes in the environment, particularly changes in climate and hydrology, can enhance management practices in riparian areas (Margolis, Meko, & Touchan, 2011;Msanne et al, 2017;Mykleby et al, 2016;Rood et al, 2007;Tene et al, 2011). The use of tree-ring methods for ecological purposes, that is, dendroecology, provides the tools to study tree responses to localized biotic and abiotic environment.…”

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confidence: 99%

Tree‐ring stable isotopes show different ecophysiological strategies in native and invasive woody species of a semiarid riparian ecosystem in the Great Plains of the United States

et al. 2019

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Persistent shifts in riparian vegetation associated with the invasion of introducedElaeagnus angustifolia and native nonriparian Juniperus virginiana have been reported in the U.S. Great Plains, with significant impacts on ecosystem services. In Nebraska, these species have been expanding into the native Populus deltoides riparian forests along the Republican River. Using dendrochronological data and stable isotope ratios, we examined the annual growth and acclimation strategies of these three species to climatic and streamflow variability. We hypothesized that the ability of invasive species to grow under a wide range of environmental conditions favour vegetation shifts at the expense of native species. Streamflow was the strongest predictor for performance. When accompanied with above-average annual precipitation, streamflow resulted in peak tree-ring widths in P. deltoides. J. virginiana showed less sensitivity, and E. angustifolia showed no response. δ 18 O values did not differ among species, which indicates that all species compete for the same water source. δ 13 C ratios and WUEi were higher in J. virginiana than in P. deltoides and E. angustifolia and increased in all species over time. E. angustifolia and P. deltoides exhibit a strong stomatal control and response to relative humidity relative to J. virginiana, which showed anisohydric stomatal behaviour. Our results show that once established, J. virginiana and E. angustifolia thrive in the understory of P. deltoides using different adaptive and acclimation strategies. Based on current water flow management, which prevents highflood pulses through the riparian zone, these species will continue to establish and spread throughout the Republican River watershed.

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Photochemistry differs between male and female Juniperus communis L. independently of nutritional availability

Rabska

Robakowski

Ratajczak

et al. 2020

Trees

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Key message Juniperus communis males are better adapted than females to changing, seasonal environmental conditions due to their higher photosynthetic capacity and the higher concentration of photosynthetic pigments in their needles. Males cope with ROS more efficiently than females having greater carotenoids concentration in needles. Abstract In dioecious woody plants, females often exhibit greater reproductive effort than male plants and as a result, they can be more vulnerable to different stressors. We hypothesized that female plants of J. communis L. could have a lower photochemical capacity and a higher level of antioxidant enzyme activity and that these differences between males and females would be more pronounced under conditions where nutrient availability is limited. We also assume that additional stressors connected with different seasons would increase those differences. Male and female plants of J. communis growing in fertilized or non-fertilized soils were used to test this hypothesis. The effect of fertilization and sex on photochemical parameters derived from chlorophyll a fluorescence light curves, and on the concentrations of photosynthetic pigments in needles, was determined in different seasons within 2 years. To assess the tolerance of male and female plants to the nutrient deficit, antioxidant enzyme activity, and the level of reactive oxygen species (ROS) were determined. Results revealed sex-related differences in photochemical parameters, level of antioxidant enzyme activity, H2O2 levels, the concentration of photosynthetic pigments, and in the leaf mass-to-area ratio. This indicates that J. communis males could be better adapted than females to changing, seasonal environmental conditions due to their higher photosynthetic capacity, as reflected by their higher ETRmax, and a higher concentration of photosynthetic pigments in their needles. The sex-related differences concerning photosynthetic capacity and stress response found in our study are constitutive traits of each sex and are genetically based as they occurred independently of fertilization.

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

Cited by 20 publications

References 65 publications

Enhanced gross primary production and evapotranspiration in juniper‐encroached grasslands

Enhanced gross primary production and evapotranspiration in juniper‐encroached grasslands

Tree‐ring stable isotopes show different ecophysiological strategies in native and invasive woody species of a semiarid riparian ecosystem in the Great Plains of the United States

Photochemistry differs between male and female Juniperus communis L. independently of nutritional availability

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