The temporal response to drought in a Mediterranean evergreen tree: comparing a regional precipitation gradient and a throughfall exclusion experiment

2013 ◽  
Vol 19 (8) ◽  
pp. 2413-2426 ◽  
Author(s):  
Nicolas K. Martin-StPaul ◽  
Jean-Marc Limousin ◽  
Hélène Vogt-Schilb ◽  
Jesus Rodríguez-Calcerrada ◽  
Serge Rambal ◽  
...  
Keyword(s):  
Precipitation Gradient ◽  
Temporal Response ◽  
Exclusion Experiment ◽  
Evergreen Tree ◽  
Throughfall Exclusion

Effects of Throughfall Exclusion on Soil Respiration in a Moso Bamboo Forest Soil in Southeast China

2013 ◽  
Vol 726-731 ◽  
pp. 3762-3766
Author(s):  
Qian Li ◽  
Ben Zhi Zhou ◽  
Xiao Ming Wang ◽  
Xiao Gai Ge ◽  
Yong Hui Cao
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Bamboo Forest ◽  
Monthly Variation ◽  
Exclusion Experiment ◽  
Throughfall Exclusion ◽  
And Control

Both soil temperature and soil water condition are important factors that influence soil respiration at different forest. In this study, a throughfall exclusion experiment was carried out to explore effects of increased soil temperature and decreased soil water content on soil respirations in the bamboo forest in North Zhejiang of China. The results showed that 1) monthly variation in soil respiration ranges from 2.00 to 0.63μmol·m-2·s-1 and 2.20 to 0.66μmolm-2s-1in throughfall exclusion and control plots respectively. The soil respiration monthly variation following the monthly variation of soil temperature and in contrast to the monthly soil water content. 2) Soil temperature can explain 65.5%and 73.9% of the variance of soil respiration in throughfall exclusion and control plots respectively. Multivariate linear model based on temperature and soil water content explained 66.9% and 73.4% of the variance of soil respiration in throughfall exclusion and control plots respectively. Soil water content had no significant relationship with soil respiration. Q10 values of throughfall exclusion and control plots were 5.99 and 4.44.

Drought Effects on Vegetation Carbon Storage in a Moso Bamboo Forest in Northern Zhejiang: Results of a Throughfall Exclusion Experiment

2013 ◽  
Vol 864-867 ◽  
pp. 2715-2718
Author(s):  
Qian Li ◽  
Ben Zhi Zhou ◽  
Xiao Ming Wang ◽  
Xiao Gai Ge ◽  
Yong Hui Cao
Keyword(s):  
Carbon Storage ◽  
Forest Ecosystem ◽  
Moso Bamboo ◽  
Bamboo Forest ◽  
Exclusion Experiment ◽  
Ecosystem Carbon ◽  
Vegetation Carbon ◽  
Vegetation Carbon Storage ◽  
Moso Bamboo Forest ◽  
Throughfall Exclusion

Soil water content is an important factor that influences plant growth of different forests, and then affecting the forest ecosystem carbon storage through the net primary productivity. In this study, a throughfall exclusion experiment was carried out to explore effects of drought on vegetation carbon storage in moso bamboo forest in North Zhejiang of China. The results were showed as follows. The vegetation carbon storage of moso bamboo forest under throughfall exclusion treatment was 14.35% lower than the control plots. And the net CO2 sequestration was 125.07% lower than the control plots. The litterfall in control plots has a tiny drop when compared with the throughfall exclusion plots. These results indicated that drought could reduce forest ecosystem carbon storage and carbon fixation capacity.

scholarly journals Climate Change in Remote Mountain Regions: A Throughfall-Exclusion Experiment to Simulate Monsoon Failure in the Himalayas

2017 ◽  
Vol 37 (3) ◽  
pp. 294 ◽  
Author(s):  
Norbu Wangdi ◽  
Kuenzang Om ◽  
Cheten Thinley ◽  
Dorji Drukpa ◽  
Tshewang Dorji ◽  
...  
Keyword(s):  
Climate Change ◽  
Mountain Regions ◽  
Exclusion Experiment ◽  
Throughfall Exclusion ◽  
Monsoon Failure

Small understorey trees have greater capacity than canopy trees to adjust hydraulic traits following prolonged experimental drought in a tropical forest

2021 ◽  
Author(s):  
A L Giles ◽  
L Rowland ◽  
P R L Bittencourt ◽  
D C Bartholomew ◽  
I Coughlin ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Tropical Forest ◽  
Tropical Forests ◽  
Light Availability ◽  
Future Climate Change ◽  
Hydraulic Systems ◽  
Exclusion Experiment ◽  
Canopy Trees ◽  
Large Trees ◽  
Throughfall Exclusion

Abstract Future climate change predictions for tropical forests highlight increased frequency and intensity of extreme drought events. However, it remains unclear whether large and small trees have differential strategies to tolerate drought due to the different niches they occupy. The future of tropical forests is ultimately dependent on the capacity of small trees (<10 cm in diameter) to adjust their hydraulic system to tolerate drought. To address this question, we evaluated whether the drought tolerance of neotropical small trees can adjust to experimental water stress and was different from tall trees. We measured multiple drought resistance-related hydraulic traits across nine common neotropical genera at the world’s longest-running tropical forest throughfall-exclusion experiment and compared their responses with surviving large canopy trees. Small understorey trees in both the Control and the throughfall exclusion treatment (TFE) had lower minimum stomatal conductance and maximum hydraulic leaf-specific conductivity relative to large trees of the same genera, as well as greater hydraulic safety margin (HSM), percentage loss of conductivity (PLC) and embolism resistance, demonstrating they occupy a distinct hydraulic niche. Surprisingly, in response to the drought treatment, small trees increased specific hydraulic conductivity by 56.3% and leaf:sapwood area ratio by 45.6%. The greater HSM of small understorey trees relative to large canopy trees likely enabled them to adjust other aspects of their hydraulic systems to increase hydraulic conductivity and take advantage of increases in light availability in the understorey resulting from the drought-induced mortality of canopy trees. Our results demonstrate that differences in hydraulic strategies between small understorey and large canopy trees drive hydraulic niche segregation. Small understorey trees can adjust their hydraulic systems in response to changes in water and light availability indicating natural regeneration of tropical forests following long-term drought may be possible.

Replicated throughfall exclusion experiment in an Indonesian perhumid rainforest: wood production, litter fall and fine root growth under simulated drought

2014 ◽  
Vol 20 (5) ◽  
pp. 1481-1497 ◽  
Author(s):  
Gerald Moser ◽  
Bernhard Schuldt ◽  
Dietrich Hertel ◽  
Viviana Horna ◽  
Heinz Coners ◽  
...  
Keyword(s):  
Root Growth ◽  
Fine Root ◽  
Litter Fall ◽  
Wood Production ◽  
Exclusion Experiment ◽  
Fine Root Growth ◽  
Simulated Drought ◽  
Throughfall Exclusion

Modelling rainfall interception in a mediterranean Quercus ilex ecosystem: Lesson from a throughfall exclusion experiment

2008 ◽  
Vol 357 (1-2) ◽  
pp. 57-66 ◽  
Author(s):  
Jean-Marc Limousin ◽  
Serge Rambal ◽  
Jean-Marc Ourcival ◽  
Richard Joffre
Keyword(s):  
Quercus Ilex ◽  
Rainfall Interception ◽  
Exclusion Experiment ◽  
Throughfall Exclusion

scholarly journals Change in hydraulic properties and leaf traits in a tall rainforest tree species subjected to long-term throughfall exclusion in the perhumid tropics

2011 ◽  
Vol 8 (8) ◽  
pp. 2179-2194 ◽  
Author(s):  
B. Schuldt ◽  
C. Leuschner ◽  
V. Horna ◽  
G. Moser ◽  
M. Köhler ◽  
...  
Keyword(s):  
Tree Species ◽  
Large Scale ◽  
Stem Diameter ◽  
Soil Drought ◽  
Diameter Growth ◽  
The Sun ◽  
Exclusion Experiment ◽  
Throughfall Exclusion ◽  
Stem Diameter Growth

Abstract. A large-scale replicated throughfall exclusion experiment was conducted in a pre-montane perhumid rainforest in Sulawesi (Indonesia) exposing the trees for two years to pronounced soil desiccation. The lack of regularly occurring dry periods and shallow rooting patterns distinguish this experiment from similar experiments conducted in the Amazonian rainforest. We tested the hypotheses that a tree's sun canopy is more affected by soil drought than its shade crown, making tall trees particularly vulnerable even under a perhumid climate, and that extended drought periods stimulate an acclimation in the hydraulic system of the sun canopy. In the abundant and tall tree species Castanopsis acuminatissima (Fagaceae), we compared 31 morphological, anatomical, hydraulic and chemical variables of leaves, branches and the stem together with stem diameter growth between drought and control plots. There was no evidence of canopy dieback. However, the drought treatment led to a 30 % reduction in sapwood-specific hydraulic conductivity of sun canopy branches, possibly caused by the formation of smaller vessels and/or vessel filling by tyloses. Drought caused an increase in leaf size, but a decrease in leaf number, and a reduction in foliar calcium content. The δ13C and δ18O signatures of sun canopy leaves gave no indication of a permanent down-regulation of stomatal conductance during the drought, indicating that pre-senescent leaf shedding may have improved the water status of the remaining leaves. Annual stem diameter growth decreased during the drought, while the density of wood in the recently produced xylem increased in both the stem and sun canopy branches (marginally significant). The sun canopy showed a more pronounced drought response than the shade crown indicating that tall trees with a large sun canopy are more vulnerable to drought stress. We conclude that the extended drought prompted a number of medium- to long-term responses in the leaves, branches and the trunk, which may have reduced drought susceptibility. However, unlike a natural drought, our drought simulation experiment was carried out under conditions of high humidity, which may have dampened drought induced damages.

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