Stemflow estimation in a redwood forest using model‐based stratified random sampling

Lewis, Jack

doi:10.1002/env.603

Cited by 13 publications

(6 citation statements)

References 22 publications

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“…A careful analysis of both gaseous and particulate compounds in the air (samples taken at a height of 3.5 m), in rainwater (pH bulk at a height of 1.5 m, throughfall in shielded 5 l funnels and stemflow in 5 l spiral type collectors), and in living and dead leaves/needles has been performed from 1993 onwards. Rainwater samples were collected every 14 days in a model-based stratified random sampling design (Lewis, 2003) of 20 trees in a 1-ha stand (10 oaks and 10 pines). Next to the precipitation volume, conductivity and pH, Cd and Cu are measured by graphite furnace atomic absorption spectrometry (GFAAS), and Zn by inductive coupled plasma atomic absorption spectrometry (ICPAAS).…”

Section: Laboratory Proceduresmentioning

confidence: 99%

Evaluating the impact of pollution on plant-Lepidoptera relationships

et al. 2005

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SUMMARYWe monitored the biodiversity of plants, adult butterflies and leaf-miners in a Dutch nature reserve over a period of six years (1994)(1995)(1996)(1997)(1998)(1999) within the International Co-operative Programme on Integrated Monitoring on Air Pollution Effects (ICP-IM). Butterfly abundance decreased steadily over the period, indicating a negative diversity trend, while the number of leaf-mining larvae of Microlepidoptera remained fairly constant. Also the concentration of pollutants (NH 4 , NO 3 , SO 4 , Cd, Cu and Zn) was determined in air, leaves, litter, throughfall and stemflow. We have no reason to expect a negative impact of acidification in rainwater or climate change, as temperature and ozone show no significant trends across the six years.It is shown that the nectar-plants of adult butterflies are much more sensitive to heavy metals than the nectarplants of moths and other pollinating insects. It is hypothesized that the butterfly decline is a secondary effect of heavy metal stress on local plants, not resulting in a decrease in the number of host-plants, but in a selective pressure of pollutants on the plant vigour, subsequently affecting their pollinators ( p < 0.001). An alternative explanation, such as the possible coexistence of a direct effect of xenobiotics on the adult Lepidoptera occurring in the study area, is not supported by our data ( p > 0.05).

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Section: Laboratory Proceduresmentioning

confidence: 99%

Evaluating the impact of pollution on plant-Lepidoptera relationships

et al. 2005

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“…Annual throughfall ranged from 78 to 72 percent over three years of measurement at IVE and averaged 75.1 percent. Lewis (2003) found that stemflow at IVE accounts for 2.5 percent of annual rainfall, leaving 22.3 percent to be trapped by foliage interception. For each species, event-based stemflow data show linear relations between event size and stemflow volumes, and this information was combined with Lewis' (2003) relations between tree diameter and annual stemflow to estimate stemflow for the plot for each event.…”

Section: Resultsmentioning

confidence: 99%

“…We implemented a study at the Caspar Creek Experimental Watersheds to measure interception in a 120-year old redwood forest, and to determine whether the process might be capable of influencing peakflow discharges and landsliding. The study is described in more detail by Lewis (2003), Reid and Lewis (in review), and Steinbuck (2002).…”

Section: Introductionmentioning

confidence: 99%

Proceedings of the Redwood Region Forest Science Symposium: what does the future hold?

Standiford¹,

Giusti²,

Valachovic³

et al. 2007

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The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD).

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“…While we do not directly measure evapotranspiration (ET), it is reasonable to assume that due to the stark differences in vegetation average ET rates are lower for LS than for VH, which further contribute to wetter conditions observed year round at LS. Another vegetation‐related hydrologic process that we were not able to consider is stemflow, which is very difficult to measure (Lewis, ). However, it is recognized that relative to direct precipitation reaching the land surface, stemflow is both slower and more gradual, yet because of direct connectivity with preferential flow paths along root systems and macropores, stemflow can also result in deeper infiltration and better drainage (Band et al, ; Ghestem et al, ).…”

Section: Discussionmentioning

confidence: 99%

Hydrologic Impacts of Landslide Disturbances: Implications for Remobilization and Hazard Persistence

Mirus

Smith

Baum

2017

Water Resources Research

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Landslides typically alter hillslope topography, but may also change the hydrologic connectivity and subsurface water‐storage dynamics. In settings where mobile materials are not completely evacuated from steep slopes, influences of landslide disturbances on hillslope hydrology and susceptibility to subsequent failures remain poorly characterized. Since landslides often recur at the site of previous failures, we examine differences between a stable vegetated hillslope (VH) and a recent landslide (LS). These neighboring hillslopes exhibit similar topography and are situated on steep landslide‐prone coastal bluffs of glacial deposits along the northeastern shore of Puget Sound, Washington. Our control hillslope, VH, is mantled by a heterogeneous colluvium, supporting a dense forest. In early 2013, our test hillslope, LS, also supported a forest before a landslide substantially altered the topography and disturbed the hillslope. In 2015, we observed a clay‐rich landslide deposit at LS with sparse vegetation and limited root reinforcement, soil structures, and macropores. Our characterization of the sites also found matrix porosity and hydraulic conductivity are both lower at LS. Continuous monitoring during 2015–2016 revealed reduced effective precipitation at VH (due to canopy interception), an earlier seasonal transition to near‐saturated conditions at LS, and longer persistence of positive pore pressures and slower drainage at LS (both seasonally and between major storm events). These differences, along with episodic, complex slope failures at LS support the hypothesis that, despite a reduced average slope, other disturbances introduced by landsliding may promote the hydrologic conditions leading to slope instability, thus contributing to the persistence of landslide hazards.

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Stemflow estimation in a redwood forest using model‐based stratified random sampling

Cited by 13 publications

References 22 publications

Evaluating the impact of pollution on plant-Lepidoptera relationships

Evaluating the impact of pollution on plant-Lepidoptera relationships

Proceedings of the Redwood Region Forest Science Symposium: what does the future hold?

Hydrologic Impacts of Landslide Disturbances: Implications for Remobilization and Hazard Persistence

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