Canopy condition: Health indicator of urban trees in the San Juan de Aragón Forest, Mexico City

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-06-16 DOI:10.24294/sf.v5i1.1623

L. D. L. Saavedra-Romero, Dionicio Alvarado-Rosales, Patricia Hernández-de La Rosa, T. Martínez-Trinidad, G. Mora-Aguilera, Jaime Villa-Castillo

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Abstract

Urban green areas provide various services to society and the environment. The Bosque San Juan de Aragón is one of the few green areas in the northeast of Mexico City and the current condition of its trees in terms of health is not known with precision. In the present study, the protocol for the crown condition indicator was implemented and adapted in 28 circular plots of 0.1 ha, randomly established in the aforementioned forest. All trees within each plot were measured for normal diameter (ND) and total height (TA), and their taxonomic classification, crown condition and plantation density were determined. For crown condition, six variables were measured: proportion of live crown (PLC), crown density (CD), crown transparency (CTR), dieback (DB), crown position (CP) and light exposure (LE). The first four were measured in 5% classes and the remaining two were measured on an ordinal scale. A total of 760 trees were evaluated, grouped into 10 families, 11 genera and 12 species. The average values for the crown variables were 56.37% PLC, 44.38% CD, 4.04% DB and 38.4% CTR. Only PLC reached the established standards of tree health found in other studies, while CD was low and CTR and DB values were high.

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树冠状况:墨西哥城圣胡安Aragón森林中城市树木的健康指标

城市绿地为社会和环境提供各种服务。博斯克圣胡安Aragón是墨西哥城东北部为数不多的绿地之一，其树木的健康状况目前尚不清楚。本研究在上述森林中随机建立的28个0.1 ha圆形样地实施并适应了树冠状况指标方案。测定样地内所有乔木的正径(ND)和总高(TA)，确定其分类、树冠状况和人工林密度。对于冠状态，测量了6个变量:活冠比例(PLC)、冠密度(CD)、冠透明度(CTR)、枯梢(DB)、冠位置(CP)和光照(LE)。前四项以5%的等级进行测量，其余两项以序数量表进行测量。共评估了760棵乔木，分为10科11属12种。冠变量的平均值为56.37% PLC, 44.38% CD, 4.04% DB和38.4% CTR。在其他研究中，只有PLC达到了树木健康的既定标准，而CD较低，CTR和DB值较高。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.