NATIVE TREE SPECIES FOR URBANIZED AND URBANIZING LANDSCAPE: Strategy for Biodiversity Conversation

Professorial Chair Lecture

Metro Manila Commission Professional Chair Lecture

Date

6-2010

Abstract

The greening of urbanized and urbanizing landscapes in the Asia-Pacific region was characterized by extensive use of exotric tree species. Introductions of exotic or so-called alien tree species for economic (i.e., for timber and food) and environmental reasons had a very long history. Great similarity of exotic tree species can be observed in most countries of SEA. Many exotic species had completely adapted and naturalized already and did not cause ceonomic and environmental harm. Moreover, they had committed to restoration and rehabilitation of denuded forest lands, successful establishment of trees and plantations, augmentation of timber supply, and greening of urban areas. Some exotic species, however, had been found to have: invasive characteristics; caused some economic and environmental damage; and association with invasive and destructive insects. The need to rescue and secure threatened, endangered, and near-extinction native tree species (indigenous and endemic) through conversation in their natural habitat, forest-based restoration, and urban greening is now recognized. Native tree species form the very fabric of our surroundings, creating our unique identity and being the pride of the country. Floral diversity of most countries in the region offers a huge opportunity for selection of potential species not only for rural but also for our urban greening, whether the aim is for economic productivity or for aesthetic and environmental enhancement. A lot of public and private institutions, groups, and individuals have already taken the initiative in promoting and using native tree species to ensure their perpetuity for the benefit of future generations. Several requirements to promote the use of native tree species include: research, aggressive information, education, and communication programs; government financial and technical support; establishment of sustained sources of seed like seed production areas (SPAs) in natural forests and seed or clonal orchards by the Department of Environment and Natural Resources; and private sectors; local government to have an urban forestry unit and a comprehensive nationwide greening program.

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