Effect of increasing climatic water deficit on some leaf and stomatal parameters of wild and cultivated almonds under Mediterranean conditions

2011 ◽  
Vol 127 (3) ◽  
pp. 234-241 ◽  
Author(s):  
Salvatore Camposeo ◽  
Marino Palasciano ◽  
Gaetano A. Vivaldi ◽  
Angelo Godini
Keyword(s):  
Water Deficit ◽  
Climatic Water Deficit ◽  
Stomatal Parameters ◽  
Mediterranean Conditions

scholarly journals Cross-scale interaction of host tree size and climatic water deficit governs bark beetle-induced tree mortality

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Michael J. Koontz ◽  
Andrew M. Latimer ◽  
Leif A. Mortenson ◽  
Christopher J. Fettig ◽  
Malcolm P. North
Keyword(s):  
Water Deficit ◽  
Sierra Nevada ◽  
Bark Beetle ◽  
Ponderosa Pine ◽  
Tree Mortality ◽  
Mortality Rates ◽  
Dendroctonus Brevicomis ◽  
Scale Interactions ◽  
Climatic Water Deficit ◽  
Host Mortality

AbstractThe recent Californian hot drought (2012–2016) precipitated unprecedented ponderosa pine (Pinus ponderosa) mortality, largely attributable to the western pine beetle (Dendroctonus brevicomis; WPB). Broad-scale climate conditions can directly shape tree mortality patterns, but mortality rates respond non-linearly to climate when local-scale forest characteristics influence the behavior of tree-killing bark beetles (e.g., WPB). To test for these cross-scale interactions, we conduct aerial drone surveys at 32 sites along a gradient of climatic water deficit (CWD) spanning 350 km of latitude and 1000 m of elevation in WPB-impacted Sierra Nevada forests. We map, measure, and classify over 450,000 trees within 9 km2, validating measurements with coincident field plots. We find greater size, proportion, and density of ponderosa pine (the WPB host) increase host mortality rates, as does greater CWD. Critically, we find a CWD/host size interaction such that larger trees amplify host mortality rates in hot/dry sites. Management strategies for climate change adaptation should consider how bark beetle disturbances can depend on cross-scale interactions, which challenge our ability to predict and understand patterns of tree mortality.

Combining the standardized precipitation index and climatic water deficit in characterizing droughts: a case study in Romania

2008 ◽  
Vol 97 (3-4) ◽  
pp. 219-233 ◽  
Author(s):  
Cr. Paltineanu ◽  
I. F. Mihailescu ◽  
Zoia Prefac ◽  
Carmen Dragota ◽  
Felicia Vasenciuc ◽  
...  
Keyword(s):  
Water Deficit ◽  
Standardized Precipitation Index ◽  
Precipitation Index ◽  
Climatic Water Deficit ◽  
The Standardized Precipitation Index

scholarly journals Gas Exchange of Mimosa tenuiflora (Willd.) Poiret Under Water Deficit and Rewatering

2019 ◽  
Vol 7 (2) ◽  
pp. 297
Author(s):  
Francisco Jose Basilio Alves ◽  
Antonio Lucineudo Oliveira Freire
Keyword(s):  
Water Stress ◽  
Stomatal Conductance ◽  
Water Deficit ◽  
Water Availability ◽  
Physiological Responses ◽  
Soil Mixture ◽  
Relative Water ◽  
Stomatal Parameters ◽  
Variable Water ◽  
Mimosa Tenuiflora

This research aimed to evaluate the physiological responses of Mimosa tenuiflora plants submitted to variable water availability conditions during the nursery stage. Twelve-month-old plants kept in plastic pots containing 5 kg of the substrate composed of the subsoil soil mixture and bovine manure (2:1) were submitted to two treatments: irrigated (control) and water stress, which was imposed through the suspension of irrigation, rewatering after seven days of stress. The relative water content (RWC) and stomatal parameters were evaluated. The M. tenuiflora plants responded quickly to the irrigation suspension, promoting the closure of the stomata, occurring reduction in stomatal conductance, transpiration rate and photosynthesis. The instantaneous efficiency in water use of plants under water deficit remained high only until the middle of the period when irrigation was suspended, and then declined until the last day of the water deficit. After rehydration, the plants showed recovery in all evaluated parameters, indicating that the level of stress imposed did not cause irreversible damages in the cells and tissues.

Climatic water deficit and surplus between the Carpathian Mountains and the Dniester River (1961–2012)

2017 ◽  
Vol 189 (11) ◽  
Author(s):  
Dumitru Mihăilă ◽  
Petruț-Ionel Bistricean ◽  
Liliana Gina Lazurca ◽  
Andrei-Emil Briciu
Keyword(s):  
Water Deficit ◽  
Carpathian Mountains ◽  
Climatic Water Deficit

Functionally relevant climate variables for arid lands: a climatic water deficit approach for modelling desert shrub distributions

2015 ◽  
Vol 42 (10) ◽  
pp. 1986-1997 ◽  
Author(s):  
Thomas E. Dilts ◽  
Peter J. Weisberg ◽  
Camie M. Dencker ◽  
Jeanne C. Chambers
Keyword(s):  
Water Deficit ◽  
Arid Lands ◽  
Climate Variables ◽  
Desert Shrub ◽  
Climatic Water Deficit

scholarly journals Tree size and climatic water deficit control root to shoot ratio in individual trees globally

2017 ◽  
Vol 217 (1) ◽  
pp. 8-11 ◽  
Author(s):  
Alicia Ledo ◽  
Keryn I. Paul ◽  
David F. R. P. Burslem ◽  
John J. Ewel ◽  
Craig Barton ◽  
...  
Keyword(s):  
Water Deficit ◽  
Tree Size ◽  
Shoot Ratio ◽  
Climatic Water Deficit ◽  
Control Root ◽  
Root To Shoot Ratio ◽  
Individual Trees

scholarly journals The Climatic Water Deficit in South Oltenia Using the Thornthwaite Method

2011 ◽  
Vol X (1) ◽  
pp. 140-148 ◽  
Author(s):  
Carmen-Sofia Dragotă ◽  
Monica Dumitraşcu ◽  
Ines Grigorescu ◽  
Gheorghe Kucsicsa
Keyword(s):  
Water Deficit ◽  
Climatic Water Deficit
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