Method for establishing urban green space pest risk evaluation system

Abstract

The invention provides a method for establishing an urban green space pest risk evaluation system, which comprises the following steps: quantitating an index layer and calculating the weight values of indexes, wherein the index layer comprises a plurality of specific indexes of a plurality of evaluation factors; calculating the index of a factor layer, wherein the factor layer comprises the plurality of evaluation factors; calculating the index of a program layer, wherein the program layer comprises a plurality of evaluation rules of the plurality of evaluation factors; and calculating the index of a target layer and determining risk levels, wherein the target layer comprises comprehensive risk index of foreign species. The method can recognize, evaluate and process uncertain events caused to urban green space ecological safety by the foreign species imported in an urban greening construction process and evaluate the comprehensive risk aroused by the foreign species.

Description

Technical field [0001] The invention relates to a pest risk analysis method, and in particular to a method for establishing a pest risk assessment system for urban green spaces. Background technique [0002] In recent years, the rapid development of urbanization has led to a further increase in the proportion of alien organisms. Take Shanghai as an example. This area was originally a plain formed by alluvial sediments. Indigenous species resources are not abundant. Exotic plants occupy Shanghai’s flora. The proportion of 57.4%. In recent years, in order to increase the variety of green plants in Shanghai, the greening department has introduced a large number of plants from abroad, making this proportion even higher. From 1998 to 2003, the number of green plant varieties in Shanghai increased. 300 species, according to the "Shanghai Greening System Planning", this number will continue to increase. However, when we introduce alien species, we are often blind and rarely consider the...

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Problems solved by technology

Therefore, although the large-scale introduction of urban greening may have an important impact on the improvement of the current poor urban ecological environment in the short term, in the long run, it may also bear the consequences of biological invasion in the unpredictable future. Because biological invasion is a lagging and slow process, its consequences often take quite a long time to manifest

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