This paper applies the concept of natural capital stock, and identifies its
critical elements, in a regional sustainable development context in order
to assess its conceptual and practical relevance. Assessment of the physica
l stock of natural capital was undertaken for Central Region in Scotland. I
t was found that the concept can be a useful way of assessing, and giving g
reater recognition to natural resources at a regional or local level. Howev
er, identification of critical levels of resources was less straightforward
. The lack of clear guidelines relating to criteria of criticality, natural
capital category aggregation issues, and conflicts between types of critic
al natural capital were encountered as major issues. The application of an
absolute preservation rule was found to suffer from the same general disadv
antages as any absolute rule. Nevertheless, the assessment of natural capit
al and identification, where possible, of critical elements were thought to
be a useful adjunct to sustainable development work. (C) 1999 Elsevier Sci
ence B.V. All rights reserved.