Sustainable yield
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The sustainable yield of
Sustainable yield is an important component of sustainable forest management. In the forestry context it is the largest amount of harvest activity that can occur without degrading the productivity of the stock. The idea of sustainable yield of forests had shifted focus from only output, to include maintaining production capacity and maintaining the natural renewal capacity of forest vegetation[1]
This concept is important in fishery management, in which sustainable yield is defined as the number of fish that can be extracted without reducing the base of fish stock, and the maximum sustainable yield is defined as the amount of fish that can be extracted under given environmental conditions.[2] In fisheries, the basic natural capital or virgin population, must decrease with extraction. At the same time productivity increases. Hence, sustainable yield would be within the range in which the natural capital together with its production are able to provide satisfactory yield.[3] It may be very difficult to quantify sustainable yield, because every dynamic ecological conditions and other factors not related to harvesting induce changes and fluctuations in both, the natural capital and its productivity.[2]
In the case of groundwater there is a safe yield of water extraction per unit time, beyond which the aquifer risks the state of overdrafting or even depletion.
See also
- Sustainable yield in fisheries
- Maximum sustainable yield
- Hans Carl von Carlowitz, who pioneered the mathematics behind sustained yield with his 1713 treatise
References
- S2CID 153325794.
- ^ a b Ricker, W.E. (1975). "Computation and Interpretation of Biological Statistics of Fish Populations". Bulletin of the Fisheries Research Board of Canada. 191.
- ISBN 978-0-521-78733-8.