气候变化领域集成服务门户(CCPortal): Effectiveness of competition indices for understanding growth in an overstocked stand

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DOI	10.1016/j.foreco.2020.118472
	Effectiveness of competition indices for understanding growth in an overstocked stand
	Curto R.D.A.; Mattos P.P.D.; Braz E.M.; Canetti A.; Péllico Netto S.
发表日期	2020
ISSN	0378-1127
卷号	477
英文摘要	The objective of this study was to select and discuss indices to explain competition among trees in an unmanaged stand in order to support decision-making in forest management. The work was carried out in a plantation of Araucaria angustifolia (Bertol.) Kuntze located in a national forest in southern Brazil. The plantation was established in 1946 in 2 × 2 m spacing, with only one thinning that happened sometime between 1970 and 1980. Forty-six sample plots were established using an adaptation of the Prodan method. We tested distance-independent and distance-dependent competition indices that included or excluded crown area variables. An equation was generated to describe the relation between diameter at breast height and crown diameter, since these were highly correlated (r = 0.87); this permitted calculation of the growth space required for the trees in the stand. It is important to carefully choose the variables and competition indices to be tested in each study case. Including crown variables did not improve prediction ability to overcome the performance of the Stage distance-independent index. In general, the distance-independent indices performed better than the distance-dependent ones, even the stand arrangement in our study area was modified through thinning, mortality, and natural regeneration. When the goal is to better understand the ecological significance of a competition index and not only its statistical ability to predict short-term growth, simpler indices are recommended. © 2020 Elsevier B.V.
英文关键词	Araucaria angustifolia; Forest management; Growing space
语种	英语
scopus关键词	Reforestation; Competition index; Diameter-at-breast heights; Highly-correlated; National forests; Natural regeneration; Short-term growth; Southern Brazil; Statistical abilities; Decision making; coniferous forest; coniferous tree; decision making; forest management; growth; stand structure; thinning; tree; Competition; Decision Making; Distance; Growth; Natural Reforestation; Trees; Variables; Brazil; Araucaria angustifolia
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154975
作者单位	Federal Rural University of Rio de Janeiro, Rod. BR 465, KM 07. 23890-000, Seropédica, RJ, Brazil; Embrapa Florestas, Estrada da Ribeira Km 111, Caixa Postal 319, Colombo, PR 83411-000, Brazil; Independent Forestry Consultant, Brazil; Federal University of Paraná, Av. Pref. Lothario Meissner 900, Curitiba, PR 80210-170, Brazil
推荐引用方式 GB/T 7714	Curto R.D.A.,Mattos P.P.D.,Braz E.M.,et al. Effectiveness of competition indices for understanding growth in an overstocked stand[J],2020,477.
APA	Curto R.D.A.,Mattos P.P.D.,Braz E.M.,Canetti A.,&Péllico Netto S..(2020).Effectiveness of competition indices for understanding growth in an overstocked stand.Forest Ecology and Management,477.
MLA	Curto R.D.A.,et al."Effectiveness of competition indices for understanding growth in an overstocked stand".Forest Ecology and Management 477(2020).