A practical modification of horizontal line sampling for snag and cavity tree inventory

$50.00 plus tax (Refund Policy)

Buy Article:

Abstract:

Snags and cavity trees are important structural features in forests, but they are often sparsely distributed, making efficient inventories problematic. We present a straightforward modification of horizontal line sampling designed to facilitate inventory of these features while remaining compatible with commonly employed sampling methods for the living overstory. The method is simpler in its implementation than traditional horizontal line sampling. We develop unbiased estimators and present methods for dealing with special cases, including boundary overlap. A field test of the method shows it to have time efficiency comparable with or better than ordinary prism cruising, and it requires far fewer sample locations to achieve similar confidence limits. The method may also be useful for inventorying other rare or unusual trees.

Les chicots et les arbres avec des cavités sont des éléments structuraux importants dans les forêts mais ils sont souvent dispersés, ce qui les rend difficiles à inventorier de façon efficace. Nous présentons une modification simple de l'échantillonnage en ligne horizontale dans le but de faciliter l'inventaire de ces éléments tout en demeurant compatible avec les méthodes d'échantillonnage communément utilisées pour le couvert formé par les arbres vivants. La méthode est plus simple à appliquer que l'échantillonnage en ligne horizontale traditionnel. Nous développons des estimateurs non biaisés et présentons des méthodes pour tenir compte des cas particuliers, incluant le chevauchement des contours. En terme d'investissement en temps, un essai sur le terrain montre que la méthode est aussi efficace, sinon plus, que l'inventaire habituel au prisme et requière beaucoup moins de points d'échantillonnage pour obtenir les mêmes limites de confiance. Cette méthode peut être utile pour inventorier d'autres arbres rares ou inhabituels.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: July 1, 2002

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
Related content

Tools

Favourites

Share Content

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
X
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