Vegetation survival and condition in public green spaces after their establishment: Evidence from a semi-arid metropolis

• Published in: International journal of agriculture and natural resources Vol. 47; no. 2; pp. 90 - 104
• Main Authors: Steinfort, Ursula, Contreras, Américo, Albornoz, Francisco, Reyes-Paecke, Sonia, Guilleminot, Paola
• Format: Journal Article
• Language: Portuguese
• Published: Pontificia Universidad Católica de Chile.Facultad de Agronomía e Ingeniería Forestal 01.08.2020
• Subjects: AGRICULTURE, MULTIDISCIPLINARY; AGRONOMY; calidad de áreas verdes; manejo de áreas verdes; urban vegetation; green spaces quality; suelos urbanos; Arbolado urbano; urban soils; ornamental gardening; vegetación urbana; Green spaces management
• ISSN: 2452-5731
• DOI: 10.7764/ijanr.v47i2.2045

Abstract Urban vegetation is generally exposed to adverse environmental conditions, such as high temperatures, compacted soils, low fertility, and a high pollutant concentration. The influence of biophysical and social factors on the survival and condition of trees and nontrees was analyzed using a census of plants in 37 green spaces of the Metropolitan Region of Santiago de Chile (MRS) several years after their establishment. The tree survival rate was higher (77%) than that of other species (24%). Survival was primarily explained by municipality management and species selection, but the relevance of these factors differed between trees and nontrees. Species with low water requirements outperformed species that were more sensitive to water stress. A high mechanical damage rate was observed, with 91% of trees showing severe or medium damage. Soil quality was better than expected, with a bulk density less than 1.0 g m−3 and moderate and high levels of P, and only 8% of sites had low K levels. The N content was highly variable, but most of the sites had levels greater than 20 mg kg−1, which indicates a trend of accumulation that is consistent with urban soils. More in-depth studies are required to establish the factors that explain plant survival in public spaces of the MRS, and irrigation monitoring is especially needed.