Elevated CO2 does not offset effects of competition and drought on growth of shea (Vitellaria paradoxa C.F. Gaertn.) seedlings

Tom-Dery, Damian; Eller, Franziska; Fromm, Jörg; Jensen, Kai; Reisdorff, Christoph

doi:10.1007/s10457-018-0286-7

Cited by 5 publications

(2 citation statements)

References 58 publications

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“…This might have been the result of decreased transpiration rate under eCO 2 . Previous studies have shown that eCO 2 increased water use efficiency by lowering the transpiration rate and moisture depletion at eCO 2 ( Schmid et al, 2016 ; Tom-Dery et al, 2019 ; Hebbar et al, 2020 ; Ma et al, 2020 ). For example, photosynthetic activities and water use efficiency of invasive A. mangium were reported to be stimulated by eCO 2 when compared to that with native B. arborescens and D. suffruticosa ( Ibrahim et al, 2020 ).…”

Section: Discussionmentioning

confidence: 94%

Effects on Photosynthetic Response and Biomass Productivity of Acacia longifolia ssp. longifolia Under Elevated CO2 and Water-Limited Regimes

et al. 2022

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It is known that the impact of elevated CO2 (eCO2) will cause differential photosynthetic responses in plants, resulting in varying magnitudes of growth and productivity of competing species. Because of the aggressive invasive nature of Acacia longifolia ssp. longifolia, this study is designed to investigate the effect of eCO2 on gas exchange parameters, water use efficiency, photosystem II (PSII) activities, and growth of this species. Plants of A. longifolia ssp. longifolia were grown at 400 ppm (ambient) and 700 ppm (elevated) CO2 under 100 and 60% field capacity. Leaf gas exchange parameters, water use efficiency, intrinsic water use efficiency, instantaneous carboxylation efficiency, and PSII activity were measured for 10 days at 2-day intervals. eCO2 mitigated the adverse effects of drought conditions on the aforementioned parameters compared to that grown under ambient CO2 (aCO2) conditions. A. longifolia, grown under drought conditions and re-watered at day 8, indicated a partial recovery in most of the parameters measured, suggesting that the recovery of this species under eCO2 will be higher than that with aCO2 concentration. This gave an increase in water use efficiency, which is one of the reasons for the observed enhanced growth of A. longifolia under drought stress. Thus, eCO2 will allow to adopt this species in the new environment, even under severe climatic conditions, and foreshadow its likelihood of invasion into new areas.

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Section: Discussionmentioning

confidence: 94%

Effects on Photosynthetic Response and Biomass Productivity of Acacia longifolia ssp. longifolia Under Elevated CO2 and Water-Limited Regimes

et al. 2022

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“…In planter bags without competition, seedlings were thinned over that same period until a single individual remained in each bag (one individual grown in 45 L of soil). The protocol of manipulating the number of individuals in a fixed amount of soil has been used by others in recent years to examine the effects of competition/competition removal in tandem with drought on plant productivity (Fernando et al, 2019; Fitzpatrick et al, 2019; Loydi et al, 2018; Tom‐Dery et al, 2018). This arrangement was selected over the “replacement” design for competition experiments where the total density of plants was maintained constant.…”

Section: Methodsmentioning

confidence: 99%

Plant functional traits affect competitive vigor of pasture grasses during drought and following recovery

et al. 2022

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Grassland biomass production is strongly linked with the timing and intensity of precipitation events. While the direct effects of precipitation patterns on grasses are well‐studied, less is known regarding plant–plant interactions during different phases of drought (i.e., dry down vs. recovery). Here, we examined how the intensity and timing of drought affected biomass production, traits related to growth rate and competitive vigor (specific leaf area [SLA], leaf dry matter content [LDMC], and height [HT]), and competitive effects in three common pasture grasses. Each species was grown alone (one individual per 45‐L planter) or with competition (one individual of each species per 45‐L planter) under three different drought types: (1) “short‐term” drought where water was withheld until the first species reached stomatal closure; (2) “prolonged” drought where water was withheld until all three species reached stomatal closure; and (3) “repeated” short‐term drought where water was withheld until the first species reached stomatal closure, plants were rewatered to capacity, and then, the drought was repeated. In all three drought types, replicates were assessed for biomass and traits pre‐ and post‐rewatering to represent the “resistance” and “recovery” phases of drought, respectively. Overall, we found (1) competitive interactions during phases of drought were primarily mediated by plant HT and LDMC, not SLA; (2) the severity and frequency of drought were key factors in describing plant–plant interactions during phases of drought; and (3) interspecific differences in traits and trait responses to drought phases were key in predicting plant–plant competition. Such shifts in competition interactions associated with interspecific trait responses to drought and during recovery from drought are likely to have significant effects on the productivity and composition of multispecies, grass‐dominated plant communities.

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Shea (Vitellaria paradoxa C.F.Gaertn.) seedlings recovery after fire: gas-exchange, growth and biomass partitioning assessment

Tom-Dery

Jensen

Reisdorff

2019

Forests, Trees and Livelihoods

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Elevated CO2 does not offset effects of competition and drought on growth of shea (Vitellaria paradoxa C.F. Gaertn.) seedlings

Cited by 5 publications

References 58 publications

Effects on Photosynthetic Response and Biomass Productivity of Acacia longifolia ssp. longifolia Under Elevated CO2 and Water-Limited Regimes

Effects on Photosynthetic Response and Biomass Productivity of Acacia longifolia ssp. longifolia Under Elevated CO2 and Water-Limited Regimes

Plant functional traits affect competitive vigor of pasture grasses during drought and following recovery

Shea (Vitellaria paradoxa C.F.Gaertn.) seedlings recovery after fire: gas-exchange, growth and biomass partitioning assessment

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