Suscetibilidade do cedro ao ataque de pragas em Floresta Estacional Decidual

Pereira, Lílian Daniel; Meyer, Evandro Alcir; Lanzarin, Karina; Wolf, Karina Marques

doi:10.1590/s0100-204x2016000500022

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…Therefore, the recovery of cedar at subtropical latitudes at the extreme north of its distribution (Hidalgo, Mexico) could be even slower. Similar results were observed in the extreme southern distribution of C. odorata in Brazil, where a low survival rate and higher pest susceptibility to Hypsipyla grandella Zeller were found, particularly in trees with a diameter lower than 8 to 12 cm (Pereira et al, 2016). This increased pest susceptibility of C. odorata at the limits of its natural distribution range was corroborated by Cavers et al (2003) and it might be related to low genetic variation (Calixto et al, 2015).…”

Section: Logging Conditionsupporting

confidence: 72%

Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations

et al. 2018

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Background and Aims: Cedrela odorata (Spanish cedar) is a tropical tree native to America with an important international trade market. In this study, the morphological variation of C. odorata was compared among three conditions: logging, plantations, and natural populations, with the objective to evaluate the current condition of managed populations after harvesting and in plantations, in contrast to relatively well-preserved populations.Methods: Two sites were chosen for each condition. The population density and four morphological attributes were measured: diameter at breast height, height, angle of branch insertion and crown form. A multivariate approach was used to compare the morphological variation among conditions (generalized discriminant factors analysis) and determine total variation distributed among size classes (cluster analysis), as well as assignment of these classes to each condition (canonical correspondence analysis).Key results: Four significantly different size classes were identified among all populations with specific association to condition. Strongest correlations were between highest trees with natural populations and small trees with plantations. Forest management, including harvesting and plantation conditions, reduced the phenotypical variation and modified the dasometrical attributes of C. odorata. The logging of the better shaped phenotypes increased the smaller size trees frequency compared to commercial size individuals, and changed the forest composition favoring small categories.Conclusions: The forest exploitation generates homogenization in median height-class and the plantation in lower height-class. In both cases, the harvestable trees are scarce, even after 20 years of management; and they are non-existent in plantations of 15 years. These results suggest that the removal of the highest trees, as well as forest plantations, are not being effective to wood production since they do not reach commercial sizes in the time of recovery or projected growth.

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Section: Logging Conditionsupporting

confidence: 72%

Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations

et al. 2018

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“…As exigências fisiológicas da espécie contemplam certa quantidade de sombra para seu desenvolvimento (INOUE, 1977). A ocorrência de eventos de supressão do crescimento pode estar relacionada a ocorrência de ataques da broca-do-cedro (Hypsipyla grandella), especialmente no início da vida de indivíduos em áreas de clareira e de menor densidade de árvores (PEREIRA et al, 2016). A baixa sincronicidade entre eventos de liberação e supressão não revelaram claras evidências de mudanças drásticas nos padrões do crescimento induzidas por eventos extremos no clima (BRIENEN et al, 2010).…”

Section: Resultsunclassified

PADRÕES DE CRESCIMENTO DE Araucaria angustifolia E Cedrela fissilis NO CENTRO-SUL DO PARANÁ

Marcon

Longhi-Santos

Botosso

et al. 2019

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RESUMOA avaliação dos padrões de crescimento das árvores pode resgatar informações e indicar características do comportamento ecológico das espécies, importantes tanto para a conservação quanto para o seu manejo. A hipótese deste estudo é que os ciclos de corte de florestas do Sul do país resultaram em eventos de liberação do crescimento nas árvores remanescentes. Os objetivos foram identificar os padrões de crescimento, compará-los com a autoecologia das espécies e verificar o sincronismo dos eventos de liberação ou supressão. Foram coletadas 3 amostras não destrutivas de lenho de cada uma das 30 árvores por espécie, com uso de trado de incremento. As amostras de lenho foram secas e polidas, para posterior delimitação e mensuração da largura dos anéis anuais de crescimento. Para verificar alterações no incremento, foram calculados os incrementos diamétricos relativos, buscando detectar padrões de liberação e/ou supressão do crescimento, bem como a sincronicidade destes eventos. Os resultados indicaram diferentes padrões de crescimento para ambas as espécies. Para A. angustifolia, a maioria das árvores não registrou eventos de liberação ou supressão. Para C. fissilis, a maioria das árvores passou por, pelo menos, um evento de supressão. A sincronicidade entre eventos de liberação e supressão foi baixa, indicando que eventos individuais, e não de grande escala, atuaram. Não foi possível identificar liberações do crescimento relacionadas ao ciclo histórico de corte seletivo ocorrido na região Sul do Brasil. PALAVRAS-CHAVE: Anéis de crescimento, Crescimento relativo, Dendrocronologia, Floresta Ombrófila Mista, Liberação e supressão.ABSTRACT Lifetime growth patterns analysis could retrieve past data and indicate species ecological behavior, essential information for nature conservation and sustainable use. We hypothesized that trees have a growth pattern according to their light demand and the cutting cycles of natural forests in the southern region resulted in growth releases. Our main objectives were to identify the lifetime growth patterns, compare with species autecology and check synchronously of suppressions and releases. We collected three wood samples from 30 trees per species using an increment borer. Wood samples were dried and polished for subsequent measurement of tree ring width. To verify changes in medium-term, we calculated the percentage growth change for year, seeking to detect suppressions, releases and their synchronicity. Our results indicated different growth patterns. For A. angustifolia, most of trees did not experience releases or suppressions. For C. fissilis, most of trees experienced at least one suppression. Releases and suppressions synchronously were low, indicating that individual and non-large-scale events have acted on radial growth. It was not possible to identify growth releases related with historic cutting cycles in the southern region of Brazil.

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“…( A n a c a r d i a c e a e ) (Mesquita et al, 2017), Cedrela fissilis Vell. (Meliaceae) (Pereira et al, 2016), and Ocotea puberula (Rich.) Nees (Lauraceae) (Witeck Neto et al, 2015, Lemes et al, 2015.…”

Section: Discussionmentioning

confidence: 99%

Oncideres saga Dalman: first record damaging Stryphnodendron adstringens Mart. Coville (Fabaceae) in Brazil

et al. 2022

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Oncideres females girdle tree branches of the Fabaceae family, interrupting the sap flow and turning the wood conditions ideal for their larvae development. The bark of Stryphnodendron adstringens (Mart.) Coville, a species native to the Brazilian Cerrado, is widely used in the traditional medicine. The objectives were to report, for the first time, Oncideres saga (Dalman), using S. adstringens as a host and to describe the pattern of branch girdling and oviposition distribution by this insect on these branches. The diameter at the base and the length of the girdled branches were measured and the number of incisions made by the O. saga females to oviposit, per branch section (basal, median and apical), counted. The emerged specimens were counted and the diameter of the exit holes measured. The average diameter at the base of the girdled branches was 2.5 ± 0.16 cm and the length was 90.6 ± 4.6 cm. The average number of incisions per branch was 37.7 ± 2.7. Damage by O. saga can reduce the growth and cause losses on S. adstringens, a tree with great extractivism potential.,

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Suscetibilidade do cedro ao ataque de pragas em Floresta Estacional Decidual

Cited by 7 publications

References 12 publications

Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations

Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations

PADRÕES DE CRESCIMENTO DE Araucaria angustifolia E Cedrela fissilis NO CENTRO-SUL DO PARANÁ

Oncideres saga Dalman: first record damaging Stryphnodendron adstringens Mart. Coville (Fabaceae) in Brazil

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