Extending large-scale forest inventories to assess urban forests |
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Authors: | Piermaria Corona Mariagrazia Agrimi Federica Baffetta Anna Barbati Maria Vincenza Chiriacò Lorenzo Fattorini Enrico Pompei Riccardo Valentini Walter Mattioli |
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Institution: | (1) The Pennsylvania State University, College Place, DuBois, PA 15801, USA |
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Abstract: | Urban areas are continuously expanding today, extending their influence on an increasingly large proportion of woods and trees
located in or nearby urban and urbanizing areas, the so-called urban forests. Although these forests have the potential for
significantly improving the quality the urban environment and the well-being of the urban population, data to quantify the
extent and characteristics of urban forests are still lacking or fragmentary on a large scale. In this regard, an expansion
of the domain of multipurpose forest inventories like National Forest Inventories (NFIs) towards urban forests would be required.
To this end, it would be convenient to exploit the same sampling scheme applied in NFIs to assess the basic features of urban
forests. This paper considers approximately unbiased estimators of abundance and coverage of urban forests, together with
estimators of the corresponding variances, which can be achieved from the first phase of most large-scale forest inventories.
A simulation study is carried out in order to check the performance of the considered estimators under various situations
involving the spatial distribution of the urban forests over the study area. An application is worked out on the data from
the Italian NFI. |
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