Marginal Zone and Ecological Effect Evaluation of Urban Greening
The existence of marginal areas of urban greening patches from the theoretical,practical and expectational perspectives,as well as the marginal ecological effects which could be exploited were argued.The marginal effect that produced by this type of patches could not only be ignored in the greening construction,but which should be taken advantage of to make urban greening more scientific.Doubt on the assessment survey of urban greening and the assessment indicater of ecological rate of urban greening were put forward and the quantizing steps of ecological rate of urban greening were elabrated.Meanwhile,a comparison between urban greening and the marginal effect of natural conservations was made to make inferences of the design of urban greening,and ultimately three instructive advices about urban greening planning were come up with.
Urban greening patchesEdge effectsEcological effectsProtected areasUrban greening plan