Growth reaction patterns of tree height, diameter, and volume of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) under acute drought stress in Southern Germany

Rais, Andreas; Kuilen, J.W.G. van de; Pretzsch, Hans

doi:10.1007/s10342-014-0821-7

Cited by 77 publications

(42 citation statements)

References 51 publications

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“…We observed that change in stem height was a more sensitive indicator of drought stress than stem diameter in both species (Table 2), as have other authors [28]. Bouriaud et al [29] surmised that tree height is sensitive to water stress because of restricted movement of water to the actively growing extremities.…”

Section: Stem Height and Diametersupporting

confidence: 85%

“…According to Rais et al [28], drought-induced water stress can influence tree growth even before it has an evident effect on physiological processes such as photosynthesis. We observed that change in stem height was a more sensitive indicator of drought stress than stem diameter in both species (Table 2), as have other authors [28].…”

Section: Stem Height and Diametermentioning

confidence: 99%

“…Bouriaud et al [29] surmised that tree height is sensitive to water stress because of restricted movement of water to the actively growing extremities. Moreover, water stressed trees might favor root extension over crown expansion in an attempt to compensate for the water deficit [28] [30].…”

Section: Stem Height and Diametermentioning

confidence: 99%

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Reduction in Water Stress for Tree Saplings Using Hydrogels in Soil

Kargar¹,

Suresh²,

Legrand³

et al. 2017

GEP

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The effect of soil amendment with hydrogel on reducing water stress was tested for Siberian elm (Ulmus pumila) and silver maple (Acer saccharinum) saplings. The trees were planted in soils with one of two concentrations of hydrogel (0.5% or 1% dry weight) as compared to the control soil (0% of hydrogel) and watered either daily, weekly, or bi-weekly. Growth was monitored by measuring height and stem diameter. Stress was monitored by measuring SPAD readings and normalized difference vegetation index (NDVI), as proxy measures of chlorophyll content and photosynthetic activity, respectively. Water stress decreased NDVI (p < 0.05) but did not have a significant effect on SPAD readings. Soil with 0.5% concentration of hydrogel was positively associated with greater height and NDVI (p < 0.01) for both maple and elm trees. Hydrogels had a species-specific effect on SPAD readings. The interaction between hydrogel concentration and the watering regime had a significant effect on the height and NDVI (p < 0.01) of elms, but not maples. The improved performance of water-stressed tree saplings in hydrogel-amended soils was presumably due to the ability of hydrogels to absorb and then gradually release water and nutrients. This is of special interest for urban foresters, because water stress and nutrient deficiency are two important growthlimiting factors for street trees.

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Section: Stem Height and Diametersupporting

confidence: 85%

Section: Stem Height and Diametermentioning

confidence: 99%

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Reduction in Water Stress for Tree Saplings Using Hydrogels in Soil

Kargar¹,

Suresh²,

Legrand³

et al. 2017

GEP

View full text Add to dashboard Cite

show abstract

“…Extreme drought years, such as 2003, can have a great impact on the growth of trees [31]. The effects of extreme droughts on tree growth patterns may persist several years after the drought.…”

Section: Statistical Analysesmentioning

confidence: 99%

“…Although numerous studies regarding the drought tolerance and resilience of forest trees in relation to their site conditions exist [29,31,37,[70][71][72], the behavior of urban trees to drought is rarely researched [33,38,39]. However, urban trees are of great benefit to the climate of a city and the well-being of its citizens.…”

Section: Tree Ring Analysis: Quantification Of Growth Of Urban Trees mentioning

confidence: 99%

The Urban Environment Can Modify Drought Stress of Small-Leaved Lime (Tilia cordata Mill.) and Black Locust (Robinia pseudoacacia L.)

Moser

Rötzer

Pauleit

et al. 2016

Forests

Self Cite

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Abstract:The urban environment characterized by various stresses poses challenges to trees. In particular, water deficits and high temperatures can cause immense drought stress to urban trees, resulting in reduced growth and die-off. Drought-tolerant species are expected to be resilient to these conditions and are therefore advantageous over other, more susceptible species. However, the drought tolerance of urban trees in relation to the specific growth conditions in urban areas remains poorly researched. This study aimed to analyze the annual growth and drought tolerance of two common urban tree species, namely small-leaved lime (Tilia cordata Mill. (T. cordata)) and black locust (Robinia pseudoacacia L. (R. pseudoacacia)), in two cities in southern Germany in relation to their urban growing conditions. Marked growth reductions during drought periods and subsequent fast recovery were found for R. pseudoacacia, whereas T. cordata exhibited continued reduced growth after a drought event, although these results were highly specific to the analyzed city. We further show that individual tree characteristics and environmental conditions significantly influence the growth of urban trees. Canopy openness and other aspects of the surrounding environment (water supply and open surface area of the tree pit), tree size, and tree species significantly affect urban tree growth and can modify the ability of trees to tolerate the drought stress in urban areas. Sustainable tree planting of well adapted tree species to their urban environment ensures healthy trees providing ecosystem services for a high quality of life in cities.

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Drought impact on forest regeneration in the SoutheastUSA

2017

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Abstract. Elevating concentrations of atmospheric greenhouse gases are now widely acknowledged as a major cause of global warming. A warmer climate could increase the frequency, duration, and/or severity of drought and, in turn, could alter the composition, structure, and biogeography of forests in many regions. To explore the regional effects of different drought severities on forest regeneration, we investigated changes in sapling growth and density across the southeastern United States under various drought and stand conditions using 1991-2005 Forest Health and Monitoring plot data from Alabama, Georgia, and Virginia. Drought effects were examined on three species groups (pine, oak + hickory, and mesophytic species) using the Palmer Drought Severity Index. Stand and site variables, including total basal area, total stand density, tree species richness, slope, and stand age, were used to account for drought effects under varying stand conditions. The oak + hickory and mesophytic species groups exhibited significant reductions in annual growth rate with increasing drought severity. However, no significant difference in annual growth rate was observed within the pine species group. Chi-square analysis showed that annual mortality rate was significantly dependent on drought severity for each species group but annual recruitment rate was only significantly dependent on drought severity for the oak + hickory group. Total basal area, tree species richness, and stand age had a negative effect on growth in one or more species groups. The observed differential dynamics of sapling growth, mortality, and recruitment among species groups may alter the trend of forest regeneration in southeastern U.S. forests because of the predicted increases in intensity and frequency of droughts in the future. The significant effects of stand conditions on drought responses observed in our study also suggest that appropriate forest management strategies may be useful to maintain structure features of understory saplings for southeastern U.S. forests.

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Growth reaction patterns of tree height, diameter, and volume of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) under acute drought stress in Southern Germany

Cited by 77 publications

References 51 publications

Reduction in Water Stress for Tree Saplings Using Hydrogels in Soil

Reduction in Water Stress for Tree Saplings Using Hydrogels in Soil

The Urban Environment Can Modify Drought Stress of Small-Leaved Lime (Tilia cordata Mill.) and Black Locust (Robinia pseudoacacia L.)

Drought impact on forest regeneration in the SoutheastUSA

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