A distance limited method for sampling downed coarse woody debris

Gove, Jeffrey H.; Ducey, Mark J.; Valentine, Harry T.; Williams, Michael S.

doi:10.1016/j.foreco.2012.06.014

Cited by 13 publications

(4 citation statements)

References 25 publications

(35 reference statements)

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“…Another new method is perpendicular distance sampling (PDS) which samples logs using probability proportional to volume concepts Gove et al 2012;Williams and Gove 2003). With PDS, the total volume of the logs on a landscape can be estimated from counts of logs at various sample points.…”

Section: Distance Samplingmentioning

confidence: 99%

“…This method is most effective for measuring only one fuel component, CWD (Gove et al 2012), but Ducey et al (2008) demonstrated how PDS can be used to estimate other ecological attributes, perhaps finding a future use in FWD loading estimation. Several studies have compared traditional sampling techniques and PDS methods and variants to evaluate their performance, accuracy, and bias in measuring CWD (Bate et al 2004;Delisle et al 1988;Lutes 1999;Jordan et al 2004;Woldendorp et al 2004).…”

Section: Distance Samplingmentioning

confidence: 99%

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Wildland Fuel Fundamentals and Applications

Keane

2015

153

149

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Section: Distance Samplingmentioning

confidence: 99%

Section: Distance Samplingmentioning

confidence: 99%

Wildland Fuel Fundamentals and Applications

Keane

2015

153

149

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“…As we stated earlier, the smaller the quantity of woody debris considered, the more the sampling transect length should be extended. It should be noted, however, that for large logs in harvested stands, to achieve desired precision levels, much longer transects should be used (up to 3000 to >4000 m [45]) or other protocols could be applied [24,41,46,47].…”

Section: Trueness Precision and Efficiency Of Fas And Lismentioning

confidence: 99%

How to Evaluate Downed Fine Woody Debris Including Logging Residues?

Korboulewsky

Bilger

Bessaad

2021

Forests

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Volume or biomass estimates of downed woody debris are crucial for numerous applications such as forest carbon stock assessment, biodiversity assessments, and more recently for environmental evaluations of biofuel harvesting practices. Both fixed-area sampling (FAS) and line-intersect sampling (LIS) are used in forest inventories and ecological studies because they are unbiased and accurate methods. Nevertheless, most studies and inventories take into account only coarse woody debris (CWD, >10 cm in diameter), although fine woody debris (FWD) can account for a large part of the total downed biomass. We compared the LIS and FAS methods for FWD volume or biomass estimates and evaluated the influence of diameter and wood density measurements, plot number and size. We used a Test Zone (a defined surface area where a complete inventory was carried out, in addition to FAS and LIS), a Pilot Stand (a forest stand where both LIS and FAS methods were applied) and results from 10 field inventories in deciduous temperate forest stands with various conditions and amounts of FWD. Both methods, FAS and LIS, provided accurate (in trueness and precision) volume estimates, but LIS proved to be the more efficient. Diameter measurement was the main source of error: using the mean diameter, even by diameter class, led to an error for volume estimates of around 35%. On the contrary, wood density measurements can be simplified without much influence on the accuracy of biomass estimates (use of mean density by diameter class). We show that the length and number of transects greatly influences the estimates, and that it is better to apply more, shorter transects than fewer, longer ones. Finally, we determined the optimal methodology and propose a simplification of some measurements to obtain the best time-precision trade-off for FWD inventories at the stand level.

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“…Forests naturally produce woody residues through the fall of dead branches and trunks or whole trees (Cruz & Silva, 2009). This vegetal detritus, known as necromass, constitute a crucial component of the forest structure acting both in quantitative aspect and in the functioning of the ecosystem (Sanchez et al, 2009;Gove et al, 2012;Bassett et al, 2015). Necromass stores a considerable amount of carbon (Russell et al, 2015;Iwashita et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Plant Necromass Component: Methodological Approaches and Estimates in Atlantic Forest, Northeast Brazil

2019

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Necromass is a crucial component for the forest structure. However, there are few studies of necromass quantification in tropical rainforests and lack of efficient sampling methods. This research aimed at verifying the accuracy and effectiveness of sampling methods (Line-intersect sampling-LIS versus fixed area plots-FA) for the estimation of necromass in a tropical rainforest. The accuracy and efficiency of the methods were evaluated through descriptive statistics, paired t-test, ANOVA and relative efficiency. LIS method was more accurate and efficient, but it requires high sampling to meet sample error of 15%. Necromass at the forest fragment studied accounted for about 12.28% of the tree biomass. These findings show the importance of this compartment inclusion when quantifying carbon stocks in humid tropical forests, which acts as a true reservoir of carbon.

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A distance limited method for sampling downed coarse woody debris

Cited by 13 publications

References 25 publications

Wildland Fuel Fundamentals and Applications

Wildland Fuel Fundamentals and Applications

How to Evaluate Downed Fine Woody Debris Including Logging Residues?

Evaluation of the Plant Necromass Component: Methodological Approaches and Estimates in Atlantic Forest, Northeast Brazil

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