Skip to main content

Simultaneous unbiased estimates of multiple downed wood attributes in perpendicular distance sampling

Buy Article:

$50.00 plus tax (Refund Policy)


Perpendicular distance sampling (PDS) is a fast probability-proportional-to-size method for inventory of downed wood. However, previous development of PDS had limited the method to estimating only one variable (such as volume per hectare, or surface area per hectare) at a time. Here, we develop a general design-unbiased estimator for PDS. We then show how that estimator can be used to develop simple measurement protocols that allow simultaneous, unbiased estimation of multiple downed wood variables, including logs per hectare, length of logs per hectare, surface area or area coverage per hectare, and volume per hectare.

L’échantillonnage à distance perpendiculaire (EDP) est une méthode rapide pour faire l’inventaire du bois au sol dont la probabilité est proportionnelle à la dimension. Cependant, cette méthode d’EDP a jusqu’à maintenant été développée pour estimer une seule variable (telle que le volume à l’hectare ou la superficie à l’hectare) à la fois. Ici, nous développons un estimateur non biaisé et général pour l’EDP. Nous montrons ensuite comment cet estimateur peut être utilisé pour développer des protocoles simples de mesure qui permettent d’obtenir simultanément une estimation non biaisée de plusieurs variables du bois au sol, incluant le nombre de billes à l’hectare, la longueur des billes à l’hectare, la superficie ou la surface couverte à l’hectare et le volume à l’hectare.

Document Type: Research Article

Publication date: July 1, 2008

More about this publication?
  • Published since 1971, this monthly journal features articles, reviews, notes and commentaries on all aspects of forest science, including biometrics and mensuration, conservation, disturbance, ecology, economics, entomology, fire, genetics, management, operations, pathology, physiology, policy, remote sensing, social science, soil, silviculture, wildlife and wood science, contributed by internationally respected scientists. It also publishes special issues dedicated to a topic of current interest.
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Terms & Conditions
  • Sample Issue
  • Reprints & Permissions
  • ingentaconnect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more