Edge effects and forest water use: A field study in a mixed deciduous woodland

Herbst, Mathias; Roberts, J. Murray; Rosier, P.; Taylor, M.; Gowing, David

doi:10.1016/j.foreco.2007.05.013

Cited by 78 publications

(44 citation statements)

References 36 publications

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“…However, in contrast to our method, sap flux studies do not account for understorey transpiration, evaporation from the topsoil and transpiration of trees with dbh below 10 cm (Gebauer et al, 2012). In addition, a species-specific calibration for Fraxinus (Herbst et al, 2007) was not applied by Gebauer et al (2012) which leads to an underestimation of water use by Fraxinus trees and thus to an overall lower water use of plots with strong Fraxinus presence.…”

Section: Soil Water Uptakementioning

confidence: 93%

“…Indeed, Fraxinus differs in many characteristics from other tree species. Herbst et al (2007) mention a considerably higher magnitude of sap flux densities of Fraxinus, compared to diffuse-porous species with calibrated sap flux sensors. Also a higher transpiration per unit leaf area of Fraxinus was reported for our area (Hölscher et al, 2005).…”

Section: Soil Water Uptakementioning

confidence: 96%

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Diversity did not influence soil water use of tree clusters in a temperate mixed forest

Meißner¹,

Köhler²,

Hölscher³

2013

Web Ecol.

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Abstract. Compared to monocultures, diverse ecosystems are often expected to show more comprehensive resource use. However, with respect to diversity-soil-water-use relationships in forests, very little information is available. We analysed soil water uptake in 100 tree clusters differing in tree species diversity and species composition in the Hainich forest in central Germany. The clusters contained all possible combinations of five broadleaved tree species in one-, two-and three-species clusters (three diversity levels), replicated fourfold (20 one-species, 40 two-species and 40 three-species clusters). We estimated soil water uptake during a summer dry period in 0-0.3 m soil depth, based on throughfall and soil moisture measurements with a simple budgeting approach. Throughout the whole vegetation period in 2009, soil water uptake was additionally determined at a higher temporal resolution and also for a greater part of the soil profile (0-0.7 m) on a subset of 16 intensive clusters. During the dry spell, mean soil water uptake was 1.9 ± 0.1 mm day −1 in 0-0.3 m (100 clusters) and 3.0 ± 0.5 mm day −1 in 0-0.7 m soil depth (16 clusters), respectively. Besides a slightly higher water use of Fraxinus clusters, we could not detect any effects of species identity or diversity on cluster water use. We discuss that water use may indeed be a conservative process, that differences in tree-species-specific traits may be compensated for by other factors such as herb layer coverage and tree spatial arrangement, and that diversitydriven differences in water use may arise only at a larger scale. We further conclude that with respect to stand water use "tree diversity" alone is not an appropriate simplification of the complex network of interactions between species traits, stand properties and environmental conditions that have varying influence on stand water use, both in space and time.

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Section: Soil Water Uptakementioning

confidence: 93%

Section: Soil Water Uptakementioning

confidence: 96%

Diversity did not influence soil water use of tree clusters in a temperate mixed forest

Meißner¹,

Köhler²,

Hölscher³

2013

Web Ecol.

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“…Moreover, only a few previous works on transpiration have explicitly compared water use by trees located at the edge compared to interior positions (Taylor et al, 2001;Cienciala et al, 2002;Giambelluca et al, 2003;Herbst et al, 2007). These earlier studies generally observed much higher transpiration rates by forest edge trees compared to interior trees.…”

Section: Introductionmentioning

confidence: 99%

Enhanced transpiration by riparian buffer trees in response to advection in a humid temperate agricultural landscape

Hernández‐Santana

Asbjornsen

Sauer

et al. 2011

Forest Ecology and Management

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Riparian buffers are designed as management practices to increase infiltration and reduce surface runoff and transport of sediment and nonpoint source pollutants from crop fields to adjacent streams. Achieving these ecosystem service goals depends, in part, on their ability to remove water from the soil via transpiration. In these systems, edges between crop fields and trees of the buffer systems can create advection processes, which could influence water use by trees. We conducted a field study in a riparian buffer system established in 1994 under a humid temperate climate, located in the Corn Belt region of the Midwestern U.S. (Iowa). The goals were to estimate stand level transpiration by the riparian buffer, quantify the controls on water use by the buffer system, and determine to what extent advective energy and tree position within the buffer system influence individual tree transpiration rates. We primarily focused on the water use response (determined with the Heat Ratio Method) of one of the dominant species (Acer saccharinum) and a subdominant (Juglans nigra). A few individuals of three additional species (Quercus bicolor, Betula nigra, Platanus occidentalis) were monitored over a shorter time period to assess the generality of responses. Meteorological stations were installed along a transect across the riparian buffer to determine the microclimate conditions. The differences found among individuals were attributed to differences in species sap velocities and sapwood depths, location relative to the forest edge and prevailing winds and canopy exposure and dominance. Sapflow rates for A. saccharinumtrees growing at the SE edge (prevailing winds) were 39% greater than SE interior trees and 30% and 69% greater than NW interior and edge trees, respectively. No transpiration enhancement due to edge effect was detected in the subdominant J. nigra. The results were interpreted as indicative of advection effects from the surrounding crops. Further, significant differences were document in sapflow rates between the five study species, suggesting that selection of species is important for enhancing specific riparian buffer functions. However, more information is needed on water use patterns among diverse species growing under different climatic and biophysical conditions to assist policy and management decisions regarding effective buffer design. KeywordsAcer saccharinum, Advection, Edge effect, Riparian buffer system, Sapflow, Tree water use RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. b s t r a c tRiparian buffers are designed as management practices to increase infiltration and reduce surface runoff and transport of sediment and nonpoint source pollutants from crop fields to adjacent streams. Achieving these ecosystem service goals depends, in part, on their ability to remove water from the soil via transpiration. In these systems, edges between crop fields and trees of ...

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“…It is recommended to measure the axial variations in J s with 1 or 2 probes for small trees, and 4 probes for large trees (Herbst et al, 2007). Therefore, in this study, one 30 mm long probe (TDP 30) was deployed at the north aspect of each G. biloba, A. chinensis and M. liliiflora tree.…”

Section: Sap Flow Measurements and Scaled Transpirationmentioning

confidence: 99%