The effect of collector size on forest litter-fall collection and analysis

McShane, Matthew; Carlile, D.W.; Hinds, W.T.

doi:10.1139/x83-138

Cited by 21 publications

(11 citation statements)

References 5 publications

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“…In both forest stands, thirty selfconstructed square litter traps (1 m × 1 m) were used to collect the litter fall at a height of 1 m above the ground level. The size and height of the litter traps were based on the fi ndings of McShane et al (1983) and Morrison (1991). The experimental set-up of the litter traps was concentrated around the spots where hemispherical photographs were taken (Fig.…”

Section: Collection Of Litter Fallmentioning

confidence: 99%

A comparison of optical and direct methods for monitoring the seasonal dynamics of leaf area index in deciduous forests

Mussche¹,

Samson²,

Nachtergale³

et al. 2001

Silva Fenn.

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In this study the direct method is considered to be the reference, giving the most accurate LAI-values. Both the hemispherical photography and the LAI-2000 PCA introduced an underestimation of LAI when the actual canopy leaf distribution in the crown layer deviates from a random distribution of leaf area in space as is found in the mixed oak/beech stand. However, when the condition of random leaf distribution is nearly fulfi lled (ash stand), the LAI-2000 PCA gave LAI-values which were close to the results obtained from the direct method. Regression curves with R 2 > 0.93 could be calculated for both indirect methods.

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Section: Collection Of Litter Fallmentioning

confidence: 99%

A comparison of optical and direct methods for monitoring the seasonal dynamics of leaf area index in deciduous forests

Mussche¹,

Samson²,

Nachtergale³

et al. 2001

Silva Fenn.

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“…The collectors were 20 ϫ 20 cm (0.04 m 2 ) with 5 cm high walls. McShane et al (1983) found that collectors between 0.010 and 0.933 m 2 can be used to estimate litterfall precisely, depending upon the objectives and other costs. The littertraps were made of plastic mesh (0.5 cm) and placed at ground level to obtain estimates of understory litterfall (includes grasses and herbs) as well as litterfall from aspen.…”

Section: Litter Trapsmentioning

confidence: 99%

Soil Nutrient Dynamics in a Boreal Mixedwood Cutover Following the Application of Hexazinone

Maynard

1997

Ecological Applications

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Large-scale human disturbances, primarily harvesting and site preparation, are recent and increasingly frequent activities in the Boreal Mixedwood, and potential impacts on long-term site productivity are unknown. A 7-yr experiment was carried out in a clear-cut Boreal Mixedwood forest to assess the effect of the herbicide hexazinone on soil nutrient dynamics.A completely randomized design with three herbicide treatments (0, 2, and 4 kg of active ingredient (a.i.) per hectare applied as Pronone 10G) and five replicates per treatment was established. The surface organic horizon (L-H) and three mineral horizons (Ah, Ae, and Btnj horizons) were sampled for five years: one year prior to the herbicide application and during the first, second, third, and sixth year after the herbicide was applied. Littertraps and lysimeters were installed and samples collected for the first three years of the study.Total biomass decreased and N concentrations increased in litterfall for at least 2 yr following the application of hexazinone. Other elemental concentrations were affected only in the year of application. Concentrations of ammonium (NH 4 ϩ -N) and nitrate (NO 3 Ϫ -N) in the L-H of the hexazinone treatments were higher relative to the control. Extractable phosphorus (P), sulfur (S), and potassium (K) in the L-H of the herbicide treatments were lower by as much as 25%. These differences persisted for the duration of the study. No changes in extractable calcium (Ca) and magnesium (Mg) were found. Elevated concentrations of NH 4 ϩ -N and K were measured in the Ah and Ae mineral horizons of the highest herbicide treatment, but total soil nutrient pools remained unaffected by the herbicide treatments.Reduced plant uptake of nutrients and the indirect impact of changes to the vegetation on soil mineralization-immobilization processes resulted in the differences in the available nutrient concentrations of the L-H horizon. The short-term results (6 yr) following the hexazinone application indicate that there was little change to the total nutrient pools and that the potential loss of nutrients at this site was minimal.

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“…Studies of spatial variation in litterfall mass have examined the effect of collector size (McShane et al. , Morrison , Búrquez et al. ), design (Búrquez et al.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies of sampling efficiency have focused more on characterizing leaf litter mass than chemistry. Studies of spatial variation in litterfall mass have examined the effect of collector size (McShane et al 1983, Morrison 1991, B urquez et al 1999, design (B urquez et al 1999), position (Welbourn et al 1981, Boerner andKooser 1989), and number (McShane et al 1983, Morrison 1991, B urquez et al 1999, Finotti et al 2003, Dellenbaugh et al 2007). Studies of temporal variation in litterfall mass have addressed seasonal and interannual variability (Gresham 1982, Stocker et al 1995.…”

Section: Introductionmentioning

confidence: 99%

Sampling effort and uncertainty in leaf litterfall mass and nutrient flux in northern hardwood forests

et al. 2017

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Abstract. Designs for litterfall sampling can be improved by understanding the sources of uncertainty in litterfall mass and nutrient concentration. We compared the coefficient of variation of leaf litterfall mass and nutrient concentrations (nitrogen, phosphorus, calcium, magnesium, and potassium) at different spatial scales and across years for six northern hardwood species from 23 stands in the White Mountains of New Hampshire, USA. Stands with steeper slopes (P = 0.01), higher elevations (P = 0.05), and more westerly aspect (P = 0.002) had higher interannual variation in litter mass, probably due to a litter trap design that allowed litter to blow into traps in windy years. The spatial variation of nutrient concentrations varied more across stands than within stands for all elements (P < 0.001). Phosphorus was the most spatially variable of all nutrients across stands (P < 0.001). Litter nutrient concentrations varied less from year to year than litter mass, but the magnitude of difference depended on the element and tree species. We compared the relative importance of variation in mass vs. concentration to estimates of nutrient flux by simulating different sampling intensities of one while holding the other constant. In this dataset, interannual variability of leaf litter mass contributed more to uncertainty in litterfall flux calculations than interannual variation in nutrient concentrations. Optimal sampling schemes will depend on the elements of interest and local factors affecting spatial and temporal variability.

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The effect of collector size on forest litter-fall collection and analysis

Cited by 21 publications

References 5 publications

A comparison of optical and direct methods for monitoring the seasonal dynamics of leaf area index in deciduous forests

A comparison of optical and direct methods for monitoring the seasonal dynamics of leaf area index in deciduous forests

Soil Nutrient Dynamics in a Boreal Mixedwood Cutover Following the Application of Hexazinone

Sampling effort and uncertainty in leaf litterfall mass and nutrient flux in northern hardwood forests

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