Robbie Andrew

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Assessment of multiple ecosystem services in New Zealand at the catchment scale


The ecosystem services approach to resource management considers all services provided by ecosystems to all sections of the community. As such, it could be used to assess sustainability of human development and equity in resource use. To facilitate the approach, tools are required at the level of detail at which policy and management decisions are made. We have developed spatially explicit models of indicators of important ecosystem services in New Zealand: regulation of climate, control of soil erosion, regulation of water flow (quantity), provision of clean water (quality), provision of food and fibre, and provision of natural habitat. The models were developed using lookup tables from process-based models to allow rapid evaluation of land-use scenarios. We demonstrate the application of the models to assess ecosystem services in a simulation of hill-country afforestation in the Manawatu catchment, which has recently seen increasing soil erosion in the hills leading to sedimentation of waterways. Each ecosystem service was assessed by calculating the change in the indicator relative to two extremes. The ecosystem services with the largest relative changes were control of soil erosion, carbon sequestration, and provision of wood.

Services from the environment to our culture


The field of ecosystem services describes how we benefit from the environment, including in intangible ways. While there are some established (albeit debated) methods for putting a value on some services, cultural ecosystem services are often placed in the too-hard basket. In this work, Robbie Andrew provides an overview of cultural ES, discussing the difficulties and presenting some potential solutions. Learn more »

A synthesis of carbon in international trade

In this comprehensive and up-to-date overview of the analysis of carbon embodied in international trade, Glen Peters and colleagues bring together treatments of some of the key issues, and introduce important new analyses. Learn more »

Sharing responsibility

The two prevalent approaches to allocating responsibility for greenhouse gas emissions – production and consumption perspectives – push responsibility to either end of the supply chain. In this study, Robbie Andrew and Vicky Forgie present the first national-level application of the shared responsibility perspective. Learn more »

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