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Remote sensing aided monitoring of non-timber forest resources

a literature survey

Löfstrand, Ronny and Olsson, Håkan and Reese, Heather (2000). Remote sensing aided monitoring of non-timber forest resources. Umeå: (S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
, Sveriges lantbruksuniversitet. Arbetsrapport / Sveriges lantbruksuniversitet, Institutionen för skoglig resurshushållning och geomatik ; 66
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Abstract

Forests have traditionally been multiple use areas. However, during the last century the scientific
literature on forests has been dominated by timber related issues. The non-wood forest-based
resources such as recreation, biodiversity, water, wildlife habitat, range and fisheries did not gain
recognition until multiple-use of forests became a renewed concept (Hytonen et al. 1995). That
recognition came when the Multiple Use Sustained Yield Act (USA) was passed in 1960 which
promoted sustained management of all renewable forest resources, including the non-wood ones.
Another catalyst for interest in forests as non-wood resources was the 1992 Convention on
Biological Diversity. These non-wood resources have been treated under different names e.g.
non-wood goods and services (NWGS), non-wood benefits (Wibe 1994) that can all be regarded
synonymous to non-timber forest resources (NTFR) which is the term used in the present project.
The landscape can be thought of as a hierarchically organised system (Forman and Godron
1986). In order to understand the landscape, and to be able to predict changes using this, three
linkages must be known. Each landscape element is linked to the: 1) encompassing element at
the next higher level; 2) nearby elements at the same scale; and 3) component elements at the
next lower level. Each level in the hierarchy represents a single scale, from fine grained to coarse
grained (Forman 1995).
The occurrence of resources and their distributional pattern in the landscape are to a large extent
scale-dependent (Turner 1989). The same can be said about processes, although processes are
usually aspects of biodiversity that are less easy to observe. With processes, the time dimension
should also be included since many processes occur very slowly. In order to determine the
existence of processes or NTFRs, indicators are sometimes used. Indicators work as observable
substitutes for the object or process of interest, the existence for which they provide evidence.
Due to the described hierarchical nature of the landscape, the scale-dependency of monitoring
and mapping resources, and the necessity to use indicators, there is a need to combine different
data sources, i.e. field data, mapped information and when feasible remote sensing data. Usually
when remote sensing data is used, it must be combined with a field sample with known
geographical position.
The objective of the present literature review is to provide an overview of remote sensing related
methods for monitoring NTFR. Our aim is not to produce a complete review of the topic, but
rather to present a sample of studies that can be regarded as good representatives of what has
been achieved and reported in the scientific literature. The focus is on published studies, research
and operational monitoring where remote sensing has been used for monitoring of non-timber
forest resources. The whole NTFR concept is considered, in the event that we find meaningful
studies, but the focus falls primarily on biodiversity monitoring. The scales used in most studies
are from stand (1 ha) up to landscape (100 km by 100 km) level, and using remote sensing data
sources with image elements ranging from 1 to 200m.

Authors/Creators:Löfstrand, Ronny and Olsson, Håkan and Reese, Heather
Title:Remote sensing aided monitoring of non-timber forest resources
Subtitle:a literature survey
Series/Journal:Arbetsrapport / Sveriges lantbruksuniversitet, Institutionen för skoglig resurshushållning och geomatik (1401-1204)
Year of publishing :2000
Number:66
Number of Pages:36
Place of Publication:Umeå
Publisher:Institutionen för skoglig resurshushållning, Sveriges lantbruksuniversitet
ISSN:1401-1204
Language:English
Publication Type:Report
Full Text Status:Public
Agris subject categories.:K Forestry > K10 Forestry production
U Auxiliary disciplines > U40 Surveying methods
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
Agrovoc terms:forest land, remote sensing, mulitple use, landscape, ecology, biodiversity
Keywords:forest land, remote sensing, mulitiple use, landscape, ecology, biodiversity
URN:NBN:urn:nbn:se:slu:epsilon-e-529
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-529
ID Code:8858
Department:(S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
Deposited By: Bo Jonsson
Deposited On:25 May 2012 12:24
Metadata Last Modified:02 Dec 2014 10:50

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