Responses of three bottomland species with different flood tolerance capabilities to various flooding regimes

Pezeshki, S. R.; Anderson, Peter H.

doi:10.1007/bf02150538

Cited by 52 publications

(29 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, use and replenishment of water stored in this species is not large, allowing G S to be calculated from J S on half-hourly time scales without accounting for modulation by storage. Half-hourly means of G S under sufficient light and low D were within the range of instantaneous g S reported for seedlings (Pezeshki et al 1995;Pezeshki and Anderson 1997). Nevertheless, caution must be used when interpreting early morning data, when J S and D are often immeasurable, but G S may be high.…”

Section: Resultssupporting

confidence: 62%

“…Flood-tolerant species grow well under flooded conditions, and avoid the adverse consequences of an anaerobic rooting zone mostly by producing adventitious roots into the water above the soil (Sena Gomes and Kozlowski 1980;Pezeshki and Anderson 1997). Taxodium distichum (L.) Richard is a highly flood-tolerant species (see Brown and Montz 1986;Megonigal et al 1997), with transpiration that proceeds at high rates under continuous flooding (Brown 1981;Oren et al 1999a).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sensitivity of mean canopy stomatal conductance to vapor pressure deficit in a flooded Taxodium distichum L. forest: hydraulic and non-hydraulic effects

et al. 2001

View full text Add to dashboard Cite

We measured the xylem sap flux in 64-yearold Taxodium distichum (L.) Richard trees growing in a flooded forest using Granier-type sensors to estimate mean canopy stomatal conductance of the stand (G S ). Temporal variations in G S were investigated in relation to variation in vapor pressure deficit (D), photosynthetic photon flux density (Q o ), and the transpiration rate per unit of leaf area (E L ), the latter variable serving as a proxy for plant water potential. We found that G S was only weakly related to Q o below 500 µmol m -2 s -1 (r 2 =0.29), but unrelated to Q o above this value. Above Q o =500 µmol m -2 s -1 and D=0.6 kPa, G S decreased linearly with increasing E L with a poor fit (r 2 =0.31), and linearly with lnD with a much better fit (r 2 =0.81). The decrease of G S with lnD was at a rate predicted based on a simple hydraulic model in which stomata regulate the minimum leaf water potential. Based on the hydraulic model, stomatal sensitivity to D is proportional to stomatal conductance at low D. A hurricane caused an ~41% reduction in leaf area. This resulted in a 28% increase in G S at D=1 kPa (G Sref ), indicating only partial compensation. As predicted, the increase in G Sref after the hurricane was accompanied by a similar increase in stomatal sensitivity to D (29%). At night, G Sref was 20% of the daytime value under non-limiting light (Q o >500 µmol m -2 s -1 ). However, stomatal sensitivity to D decreased only to ~46% (both reductions referenced to prehurricane daytime values), thus having more than twice the sensitivity expected based on hydraulic considerations alone. Therefore, non-hydraulic processes must cause heightened nighttime stomatal sensitivity to D.

show abstract

Section: Resultssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Sensitivity of mean canopy stomatal conductance to vapor pressure deficit in a flooded Taxodium distichum L. forest: hydraulic and non-hydraulic effects

et al. 2001

View full text Add to dashboard Cite

show abstract

“…For instance, a decrease in soil Eh from +540 mV to -225 mV reduced net photosynthesis in nuttall oak (Quercus nuttallii Palmer) and baldcypress (Taxodium distichum (L.) Rich.) by 76 and 19%, respectively (Pezeshki and Anderson 1997).…”

Section: Discussionmentioning

confidence: 99%

Effects of soil moisture regimes on growth and survival of black willow (Salix nigra) posts (cuttings)

1998

View full text Add to dashboard Cite

A study was conducted under greenhouse conditions to examine the effects of various soil moisture regimes on black willow (Salix nigra) posts (cuttings). Five treatments representing a range of soil moisture regimes, from continuous flooding to mild drought, were imposed separately. A well-watered, welldrained treatment served as the control. Leaf gas exchange (stomatal conductance and net photosynthesis), survival, and biomass production of posts were evaluated. The stomatal conductance and net photosynthesis data clearly demonstrated the sensitivity of willow posts to low oxygen conditions (under flooded treatments) as well as to soil drought. Growth and biomass were also adversely affected by flooding and drought treatments. The patterns of root development along the posts seemed to be associated with the watering regime. Root biomass was depressed in zones subjected to flooding and low soil redox potential. In addition, leaf area, leaf biomass, and shoot (leaf+branch) biomass were significantly lower in the continuously-flooded and drought treatments as compared to control plants. Results indicated that maximum photosynthesis and growth in willow posts required ample soil moisture (but non-waterlogging conditions) and adequate drainage in the top 60 cm of soil. The use of willow posts for streambank restoration remains as a viable strategy; however, considerations should be given to water-table elevations, soil Eh conditions, soil moisture regime, and soil texture in order to improve the prospect for successful results.

show abstract

“…Conductance in T. distichum seedlings nearly or completely recovers to preflooding values after two weeks of transient response (Pezeshki et al 1995, Allen et al 1996, in part because of the production of adventitious roots (Hook 1984, Megonigal and Day 1992, Pezeshki and Anderson 1997. The physiology of mature T. distichum has rarely been studied (but see Brown 1981), but it is known that artificial flooding of mature individuals results in the production of water roots within 3 years following flooding (Harms et al 1980).…”

Section: Introductionmentioning

confidence: 99%

“…Taxodium distichum is a highly flood-tolerant species (Megonigal et al 1997, Hall andHarcombe 1998), particularly under conditions when floodwaters are flowing (Brown andMontz 1986, Pezeshki andAnderson 1997). Conductance in T. distichum seedlings nearly or completely recovers to preflooding values after two weeks of transient response (Pezeshki et al 1995, Allen et al 1996, in part because of the production of adventitious roots (Hook 1984, Megonigal and Day 1992, Pezeshki and Anderson 1997.…”

Section: Introductionmentioning

confidence: 99%

Sap-flux-scaled transpiration responses to light, vapor pressure deficit, and leaf area reduction in a flooded Taxodium distichum forest

et al. 1999

View full text Add to dashboard Cite

SummaryWe used 20-mm-long, Granier-type sensors to quantify the effects of tree size, azimuth and radial position in the xylem on the spatial variability in xylem sap flux in 64-year-old trees of Taxodium distichum L. Rich. growing in a flooded forest. This information was used to scale flux to the stand level to investigate variations in half-hourly and daily (24-hour) sums of sap flow, transpiration per unit of leaf area, and stand transpiration in relation to vapor pressure deficit (D) and photosynthetically active radiation (Q o ). Measurements of xylem sap flux density (J S ) indicated that: (1) J S in small diameter trees was 0.70 of that in medium and large diameter trees, but the relationship between stem diameter as a continuous variable and J S was not significant; (2) J S at 20--40 mm depth in the xylem was 0.40 of that at 0--20 mm depth; and (3) J S on the north side of trees was 0.64 of that in directions 120°f rom the north. Daily transpiration was linearly related to daily daytime mean D, and reached a modest value of 1.3 mm day −1 , reflecting the low leaf area index (LAI = 2.2) of the stand. Because there was no soil water limitation, half-hourly water uptake was nearly linearly related to D at D < 0.6 kPa during both night and day, increasing to saturation during daytime at higher values of D. The positive effect of Q o on J S was significant, but relatively minor. Thus, a second-order polynomial with D explained 94% of the variation in J S and transpiration. An approximately 40% reduction in LAI by a hurricane resulted in decreases of about 18% in J S and stand transpiration, indicating partial stomatal compensation.

show abstract

Responses of three bottomland species with different flood tolerance capabilities to various flooding regimes

Cited by 52 publications

References 21 publications

Sensitivity of mean canopy stomatal conductance to vapor pressure deficit in a flooded Taxodium distichum L. forest: hydraulic and non-hydraulic effects

Sensitivity of mean canopy stomatal conductance to vapor pressure deficit in a flooded Taxodium distichum L. forest: hydraulic and non-hydraulic effects

Effects of soil moisture regimes on growth and survival of black willow (Salix nigra) posts (cuttings)

Sap-flux-scaled transpiration responses to light, vapor pressure deficit, and leaf area reduction in a flooded Taxodium distichum forest

Contact Info

Product

Resources

About