Seasonal Changes in Tissue Water Relations of Three Woody Species of the Quercus-Carya Forest Type

Ecology ◽  
1982 ◽  
Vol 63 (5) ◽  
pp. 1259-1267 ◽  
Author(s):  
William C. Parker ◽  
Stephen G. Pallardy ◽  
Thomas M. Hinckley ◽  
Robert O. Teskey
Keyword(s):  
Water Relations ◽  
Seasonal Changes ◽  
Forest Type ◽  
Woody Species ◽  
Tissue Water

scholarly journals Water relations and hydraulic architecture in Cerrado trees: adjustments to seasonal changes in water availability and evaporative demand

2008 ◽  
Vol 20 (3) ◽  
pp. 233-245 ◽  
Author(s):  
Sandra J. Bucci ◽  
Fabian G. Scholz ◽  
Guillermo Goldstein ◽  
Frederick C. Meinzer ◽  
Augusto C. Franco ◽  
...  
Keyword(s):  
Water Potential ◽  
Water Relations ◽  
Seasonal Changes ◽  
Soil Water Potential ◽  
Woody Species ◽  
Dry Season ◽  
Hydraulic Architecture ◽  
Wet Season ◽  
Evaporative Demand ◽  
Water Deficits

We determined adjustments in physiology and morphology that allow Neotropical savanna trees from central Brazil (Cerrado) to avoid water deficits and to maintain a nearly constant internal water balance despite seasonal changes in precipitation and air saturation deficit (D). Precipitation in the study area is highly seasonal with about five nearly rainless months during which D is two fold higher compared to wet season values. As a consequence of the seasonal fluctuations in rainfall and D, soil water potential changes substantially in the upper 100 cm of soil, but remains nearly constant below 2 m depth. Hydraulic architecture and water relations traits of Cerrado trees adjusted during the dry season to prevent increasing water deficits and insure homeostasis in minimum leaf water potential ψL and in total daily water loss per plant (isohydry). The isohydric behavior of Cerrado trees was the result of a decrease in total leaf surface area per tree, a strong stomatal control of evaporative losses, an increase in leaf-specific hydraulic conductivity and leaf hydraulic conductance and an increase in the amount of water withdrawn from internal stem storage, during the dry season. Water transport efficiency increased in the same proportion in leaves and terminal stems during the dry season. All of these seasonal adjustments were important for maintaining ψL above critical thresholds, which reduces the rate of embolism formation in stems and help to avoid turgor loss in leaf tissues still during the dry season. These adjustments allow the stems of most Cerrado woody species to operate far from the point of catastrophic dysfunction for cavitation, while leaves operate close to it and experience embolism on a daily basis, especially during the dry season.

scholarly journals Seasonal changes in tissue-water relations for eight species of ferns during historic drought in California

2016 ◽  
Vol 103 (9) ◽  
pp. 1607-1617 ◽  
Author(s):  
H. I. Holmlund ◽  
V. M. Lekson ◽  
B. M. Gillespie ◽  
N. A. Nakamatsu ◽  
A. M. Burns ◽  
...  
Keyword(s):  
Water Relations ◽  
Seasonal Changes ◽  
Tissue Water

Facing drought in a Mediterranean post-fire community: tissue water relations in species with different life traits

2004 ◽  
Vol 25 (1-2) ◽  
pp. 67-72 ◽  
Author(s):  
Marco Borghetti ◽  
F. Magnani ◽  
A. Fabrizio ◽  
A. Saracino
Keyword(s):  
Water Relations ◽  
Tissue Water ◽  
Life Traits

Leaf water relations and structural traits of four temperate woody species occurring in serpentine and non‐serpentine soil

2019 ◽  
Vol 34 (4) ◽  
pp. 485-496 ◽  
Author(s):  
Kiyosada Kawai ◽  
Haruka Saito ◽  
Hirofumi Kajino ◽  
Wataru Nakai ◽  
Ryosuke Nakamura ◽  
...  
Keyword(s):  
Water Relations ◽  
Woody Species ◽  
Serpentine Soil ◽  
Leaf Water ◽  
Leaf Water Relations ◽  
Structural Traits

scholarly journals Natural Regeneration of the Tree Stand in the Bilberry Spruce Forest—Clear-Cutting Ecotone Complex in the First Post-Logging Decade

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1542
Author(s):  
Nadezhda V. Genikova ◽  
Viktor N. Mamontov ◽  
Alexander M. Kryshen ◽  
Vladimir A. Kharitonov ◽  
Sergey A. Moshnikov ◽  
...  
Keyword(s):  
Natural Regeneration ◽  
Forest Canopy ◽  
Forest Cover ◽  
Forest Type ◽  
Ground Cover ◽  
Woody Species ◽  
Forest Edge ◽  
Tree Canopy ◽  
Clear Cut ◽  
Clear Cutting

Bilberry spruce forests are the most widespread forest type in the European boreal zone. Limiting the clear-cuttings size leads to fragmentation of forest cover and the appearance of large areas of ecotone complexes, composed of forest (F), a transition from forest to the cut-over site under tree canopy (FE), a transition from forest to the cut-over site beyond tree canopy (CE), and the actual clear-cut site (C). Natural regeneration of woody species (spruce, birch, rowan) in the bilberry spruce stand—clear-cut ecotone complex was studied during the first decade after logging. The effects produced by the time since cutting, forest edge aspect, and the ground cover on the emergence and growth of trees and shrubs under forest canopy and openly in the clear-cut were investigated. Estimating the amount and size of different species in the regeneration showed FE and CE width to be 8 m—roughly half the height of first-story trees. Typical forest conditions (F) feature a relatively small amount of regenerating spruce and birch. The most favorable conditions for natural regeneration of spruce in the clear-cut—mature bilberry spruce stand ecotone are at the forest edge in areas of transition both towards the forest and towards the clear-cut (FE and CE). Clear-cut areas farther from the forest edge (C) offer an advantage to regenerating birch, which grows densely and actively in this area.

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