The effect of heat waves, elevated [CO2] and low soil water availability on northern red oak (Quercus rubraL.) seedlings

2012 ◽  
Vol 19 (2) ◽  
pp. 517-528 ◽  
Author(s):  
Ingvar Bauweraerts ◽  
Timothy M. Wertin ◽  
Maarten Ameye ◽  
Mary Anne McGuire ◽  
Robert O. Teskey ◽  
...  
Keyword(s):  
Soil Water ◽  
Elevated Co2 ◽  
Water Availability ◽  
Heat Waves ◽  
Soil Water Availability ◽  
Red Oak ◽  
Northern Red Oak

scholarly journals Response of lentil to high temperature under variable water supply and carbon dioxide enrichment

2018 ◽  
Vol 69 (11) ◽  
pp. 1103 ◽  
Author(s):  
Audrey Delahunty ◽  
James Nuttall ◽  
Marc Nicolas ◽  
Jason Brand
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
High Temperature ◽  
Soil Water ◽  
Elevated Co2 ◽  
Water Availability ◽  
Significant Interaction ◽  
Heat Waves ◽  
Soil Water Availability ◽  
Grain Number

Lentil (Lens culinaris Medik.) production in arable, Mediterranean-type climates is limited by heat waves and unreliable rainfall. Under climate change scenarios, increased atmospheric carbon dioxide (CO2) concentration will increase plant growth; however, the net effect of increasing occurrence and intensity of heat waves and drought is unclear. This study tested the response of combined acute high temperature (>32°C) at the early pod-filling stage and (i) crop-available soil water, and (ii) elevated CO2 on three lentil genotypes in two experiments. The three lentil genotypes selected were commercial cultivar PBA Bolt and two landraces sourced from the Australian Grains Genebank, AGG 71457 and AGG 73838. High soil-water availability (0.42 Mg m–3) throughout the growing season increased yield by 28% compared with low soil-water availability (0.35 Mg m–3). Across contrasting water treatments, there was no difference in patterns of crop response to high temperature during the early pod-filling phase (5 days at 42°C daytime, 25°C night), where yields were reduced by 45%. A significant interaction between high temperature response and genotype was observed, where reduction in grain number was higher for AGG 73838 (0.20% per degree-hour >32°C) than for AGG 71457 (0.07% per degree-hour >32°C) or PBA Bolt (0.10% per degree-hour >32°C). For heat and CO2 effects, there was no significant interaction between high temperature (3 days at 38°C daytime, ambient night temperature) and CO2 treatment on yield components. There was, however, an overall trend of increased biomass, grain number and yield due to elevated CO2. Although non-limiting soil water did not reduce the impact of high temperature in this study, the range in response across genotypes to high temperature supports opportunity for increased adaptation of lentil toward increasing yield stability under effects of climate change.

scholarly journals Understorey productivity in temperate grassy woodland responds to soil water availability but not to elevated [CO2]

2018 ◽  
Vol 24 (6) ◽  
pp. 2366-2376 ◽  
Author(s):  
Luke Collins ◽  
Ross A. Bradstock ◽  
Victor Resco de Dios ◽  
Remko A. Duursma ◽  
Sabrina Velasco ◽  
...  
Keyword(s):  
Soil Water ◽  
Elevated Co2 ◽  
Water Availability ◽  
Soil Water Availability

Acclimation effects of heat waves and elevated [CO2] on gas exchange and chlorophyll fluorescence of northern red oak (Quercus rubra L.) seedlings

Plant Ecology ◽  
2014 ◽  
Vol 215 (7) ◽  
pp. 733-746 ◽  
Author(s):  
Ingvar Bauweraerts ◽  
Maarten Ameye ◽  
Timothy M. Wertin ◽  
Mary Anne McGuire ◽  
Robert O. Teskey ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Elevated Co2 ◽  
Quercus Rubra ◽  
Heat Waves ◽  
Red Oak ◽  
Northern Red Oak

scholarly journals Above- and below-ground responses of C3 -C4 species mixtures to elevated CO2 and soil water availability

2003 ◽  
Vol 9 (3) ◽  
pp. 452-460 ◽  
Author(s):  
JUSTIN D. DERNER ◽  
HYRUM B. JOHNSON ◽  
BRUCE A. KIMBALL ◽  
PAUL J. PINTER ◽  
H. Wayne POLLEY ◽  
...  
Keyword(s):  
Soil Water ◽  
Elevated Co2 ◽  
Water Availability ◽  
Soil Water Availability ◽  
C4 Species ◽  
Below Ground ◽  
Species Mixtures

scholarly journals Characterizing Growing Season Length of Subtropical Coniferous Forests with a Phenological Model

Forests ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 95
Author(s):  
Yuan Gong ◽  
Christina L. Staudhammer ◽  
Susanne Wiesner ◽  
Gregory Starr ◽  
Yinlong Zhang
Keyword(s):  
Climate Change ◽  
Soil Water ◽  
Prescribed Fire ◽  
Water Availability ◽  
Longleaf Pine ◽  
Growing Season ◽  
Soil Water Availability ◽  
Future Climate Change ◽  
Short Term ◽  
Phenological Model

Understanding plant phenological change is of great concern in the context of global climate change. Phenological models can aid in understanding and predicting growing season changes and can be parameterized with gross primary production (GPP) estimated using the eddy covariance (EC) technique. This study used nine years of EC-derived GPP data from three mature subtropical longleaf pine forests in the southeastern United States with differing soil water holding capacity in combination with site-specific micrometeorological data to parameterize a photosynthesis-based phenological model. We evaluated how weather conditions and prescribed fire led to variation in the ecosystem phenological processes. The results suggest that soil water availability had an effect on phenology, and greater soil water availability was associated with a longer growing season (LOS). We also observed that prescribed fire, a common forest management activity in the region, had a limited impact on phenological processes. Dormant season fire had no significant effect on phenological processes by site, but we observed differences in the start of the growing season (SOS) between fire and non-fire years. Fire delayed SOS by 10 d ± 5 d (SE), and this effect was greater with higher soil water availability, extending SOS by 18 d on average. Fire was also associated with increased sensitivity of spring phenology to radiation and air temperature. We found that interannual climate change and periodic weather anomalies (flood, short-term drought, and long-term drought), controlled annual ecosystem phenological processes more than prescribed fire. When water availability increased following short-term summer drought, the growing season was extended. With future climate change, subtropical areas of the Southeastern US are expected to experience more frequent short-term droughts, which could shorten the region’s growing season and lead to a reduction in the longleaf pine ecosystem’s carbon sequestration capacity.

Screening optimum population density in response to soil water availability in dryland wheat: From laboratory to field

2021 ◽  
Vol 257 ◽  
pp. 107147
Author(s):  
Sai-Yong Zhu ◽  
Zheng-Guo Cheng ◽  
Tao Tian ◽  
Dong-Shan Gong ◽  
Guang-Chao Lv ◽  
...  
Keyword(s):  
Population Density ◽  
Soil Water ◽  
Water Availability ◽  
Soil Water Availability ◽  
Optimum Population
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