The sustainable yield of natural capital is the economic yield of the capital itself, ie the surplus required to maintain ecosystem services at the same time. This usually yield varied over time with the needs of the ecosystem to Maintain Itself, eg a forest That HAS recently Suffered a blight or flooding or fire will require more of icts own ecological yield to sustain and re-establish a mature forest. While doing so, the sustainable yield may be much less.
In forestry terms it is the largest amount of harvest that can occur without degrading the productivity of the stock.
This concept is significant in fishery management, in qui sustainable yield is defined as the number of fish That Can Be Extracted without Reducing the basis of fish stock, and the maximum sustainable yield is defined as the amount of fish That Can Be Extracted under Given environmental conditions. 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. It can be very difficult to quantify sustainable yield, because of all the economic and ecological conditions and other factors not related to harvesting induce changes and fluctuations in both, the natural capital and its productivity.
In the case of groundwater is a safe yield of water extraction per unit time, beyond which the aquifer risks the state of overdrafting or even depletion.
- Sustainable yield in fisheries
- Sustained yield
- Jump up^ Ricker, WE (1975). „Computation and Interpretation of Biological Statistics of Fish Populations“. Bulletin of the Fisheries Research Board of Canada . 191 .