Landscape Development Intensity Index (LDI) of Important National Wetlands

Themes

Terrestrial protected areas

PSBR model type

State (S)

Corresponding targets

SDGs

15.1 By 2020, ensure the conservation, restoration, and sustainable use of terrestrial and inland freshwater ecosystems and their services, in particular forests, wetlands, mountains, and drylands, in line with obligations under international agreements.

Aichi Biodiversity Targets

Target 19: By 2020, knowledge, the science base and technologies relating to biodiversity, its values, functioning, status and trends, and the consequences of its loss, are improved, widely shared and transferred, and applied.

Biodiversity Action Plan

D21020 Complete the plan of monitoring system on terrestrial, wetland, and marine biodiversity, including the confirmation of monitoring places and methods Key performance indicator of the action plan:

• Determine the plan of locations and methods of national biodiversity monitoring

Background

Wetland is the habitat environment that many wild animals and plants depend on for their livelihoods and plays an important role in the ecosystem. In addition, wetland also has the benefits of providing locations for sightseeing and recreation and improving the resilience of the land to flood. In recent years, the environment around the wetlands has changed drastically due to the rapid increase in urbanization. Therefore, it has become an important topic to keep updated on changes in the wetland ecosystem landscape.

Definition and Calculation

First, pair the land-use data of the Third Level Category 103 with the data of other land-use categories in the National Land-Use Survey, and assign an appropriate LDI coefficient. Second, overlay the layer of Important National Wetlands onto the layer of the National Land-Use Survey for analysis. Then, based on the Taiwan Wetlands of Importance (Weng, 2007), classify the wetlands according to their locations and size of the area. At the same time, a layer of land-use from the survey on wetland and its surrounding area of 100 meters outward was used as the range to calculate LDI value. The LDI value is calculated by adding all the results of area percentages multiplied by the LDI coefficient of each land-use category, and its calculation formula is: LDItotal = Σ(%LUi × LDIi) (Brown and Vivas 2005) LDI value represents the disturbance of human activity. The greater the value, the greater the degree of exploitation, and vice versa.

The data and temporal range

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Trends

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Data Management Authorities

Coastal Restore Division, Urban and Rural Development Branch, Construction and Planning Agency, and Nonprofit Organization

References

• Brown, M. T. and Vivas M. B. (2005). Landscape Development Intensity Index. Environmental Monitoring and Assessment 101:289–309
• Chen, T. S. and Lin, H. J. (2011). Application of a Landscape Development Intensity Index for Assessing Wetlands in Taiwan. Wetlands. 31:745–756
• Chen, T. S. and Lin, H. J. (2012). Development of a framework for landscape assessment of Taiwanese wetlands. Ecological Indicators. 25:121–132
• Chen, T. S. (2013). Landscape Assessment of Important Wetlands in Taiwan.
• Chen, T. S. and Lin, H. J. (2010) Application of a Landscape Development Intensity Index for Assessing Wetlands in Taiwan, The 11th Symposium on Taiwan Wetland Ecosystem.