Genetic effects on stand-level uniformity and above- and belowground dry mass production in juvenile loblolly pine

Aspinwall, Michael J.; King, John S.; McKeand, Steven E.; Bullock, Bronson P.

doi:10.1016/j.foreco.2011.04.029

Cited by 50 publications

(33 citation statements)

References 44 publications

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“…This suggests that many of these processes and interactions could be important in monocultures that are heterogeneous, especially uneven-aged monocultures. However, just as tree species diversity does not necessarily increase productivity, structural diversity has also been found to have negative effects on productivity, and in some forest types increasing size heterogeneity can reduce productivity by 20% Ryan et al 2010;Stape et al 2010;Aspinwall et al 2011;Luu et al 2013;Bourdier et al 2016;Soares et al 2016). In such stands, the heterogeneous size structure enables larger trees to acquire higher quantities of a given resource than smaller trees, which they also use more efficiently than smaller trees.…”

Section: Tree Diversity Effects On Biomass Productionmentioning

confidence: 99%

Forest biodiversity, ecosystem functioning and the provision of ecosystem services

et al. 2017

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Forests are critical habitats for biodiversity and they are also essential for the provision of a wide range of ecosystem services that are important to human well-being. There is increasing evidence that biodiversity contributes to forest ecosystem functioning and the provision of ecosystem services. Here we provide a review of forest ecosystem services including biomass production, habitat provisioning services, pollination, seed dispersal, resistance to wind storms, fire regulation and mitigation, pest regulation of native and invading insects, carbon sequestration, and cultural ecosystem services, in relation to forest type, structure and diversity. We also consider relationships between forest biodiversity and multifunctionality, and trade-offs among ecosystem services. We compare the concepts of ecosystem processes, functions and services to clarify their definitions. Our review of published studies indicates a lack of empirical studies that establish quantitative and causal relationships between forest biodiversity and many important ecosystem services. The literature is highly skewed; studies on provisioning of nutrition and energy, and on cultural services, delivered by mixed-species forests are under-represented. Planted forests offer ample opportunity for optimising their composition and diversity because replanting after harvesting is a recurring process. Planting mixed-species forests should be given more consideration as they are likely to provide a wider range of ecosystem services within the forest and for adjacent land uses. This review also serves as the introduction to this special issue of Biodiversity and Conservation on various aspects of forest biodiversity and ecosystem services.

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Section: Tree Diversity Effects On Biomass Productionmentioning

confidence: 99%

Forest biodiversity, ecosystem functioning and the provision of ecosystem services

et al. 2017

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“…Em povoamentos clonais todas as plantas possuem a mesma capacidade genética de capturar recursos e convertê-los em estoque de biomassa (ASPINWALL et al, 2011). Porém, o seu suprimento parcial ou heterogêneo por falhas na assertividade das recomendações e na execução das operações florestais pode levar ao crescimento heterogêneo das plantas RYAN et al, 2010).…”

Section: Introductionunclassified

UNIFORMIDADE ENTRE ÁRVORES DURANTE UMA ROTAÇÃO E SUA RELAÇÃO COM A PRODUTIVIDADE EM Eucalyptus CLONAIS

Hakamada

Stape

Lemos

et al. 2015

CERNE

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RESUMO:Indivíduos de povoamentos clonais possuem a mesma capacidade de crescimento. Porém, falhas silviculturais podem levar ao fornecimento parcial ou heterogêneo de recursos, resultando em perdas de uniformidade. Estudos demonstram que a heterogeneidade entre plantas interfere na produtividade. Apesar disso, poucos trabalhos acompanharam a uniformidade do início ao fim da rotação e determinaram se o nível de uniformidade inicial interfere na produtividade na idade de corte. Assim, objetivou-se investigar o comportamento da uniformidade entre árvores ao longo de uma rotação e sua relação com a produtividade em Eucalyptus clonais. Replicou-se um ensaio em blocos casualizados em três localidades contrastando um tratamento uniforme, com mudas plantadas no mesmo momento, com um tratamento heterogêneo, onde se plantou cada terço das mudas aleatoriamente aos zero, quarenta e oitenta dias. Incremento Médio Anual (IMA) e o PV50, indicador de uniformidade do povoamento, foram determinadas trimestralmente entre 12 e 72 meses. A uniformidade foi máxima no fechamento da copa e reduziu gradualmente até o final da rotação. Porém, desde o início o tratamento heterogêneo apresentou uniformidade inferior ao uniforme. Ao final da rotação, a diferença média do PV50 entre os tratamentos nas três localidades foi de 119%. A uniformidade inicial (12, 18 e 24 meses) foi correlacionada à uniformidade (R² >0,67; p<0,001) e também à produtividade ao final da rotação (72 meses) (R² >0,43; p<0,001), sendo as parcelas mais uniformes aquelas mais produtivas. Os resultados apontam para a importância de uma silvicultura que garanta o fornecimento homogêneo de recursos. UNIFORMITY BETWEEN TREES IN A FULL ROTATION AND ITS RELATIONSHIP WITH PRODUCTIVITY IN CLONAL EucalyptusABSTRACT: Tree clonal plantations have identical growing capability. However, operational failures lead to heterogeneous resources supply, resulting in losses of uniformity. Scientific evidences have shown heterogeneity between plants interfere on wood productivity. Nevertheless, few studies relate uniformity since the beginning of rotation and determine relationship between productivity and uniformity. So, we aim to investigate the behavior of uniformity along a rotation and its relationship with productivity in Eucalyptus clonal plantation. For this, a randomized block experiment was replicated in three experimental sites. A uniform treatment, with all seedlings planted at the same time was contrasted with a heterogeneous treatment, where a third of seedlings were randomly planted on days 0, 40 and 80. Productivity and uniformity were determined quarterly from 12 to 72 months. In both treatments uniformity peaked at the time of canopy closure and was gradually reduced until the end of the rotation. However, since the beginning the heterogeneous treatment was less uniform than the uniform treatment for all sites, reaching an average difference of 119% for the PV50 at the end of rotation. Initial uniformity (12, 18 and 24 months) was highly correlated with final productivity (7...

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“…1). Significant genetic effects on GLD among half-sib, fullsib, and clonal seedling stocks has been reported (Aspinwall et al 2011b). Although the percentage of survival and the height of clonal seedlings were significantly greater than half-sib seedlings ( Fig.…”

Section: Discussionmentioning

confidence: 82%

“…These traits may indicate that the size differential among genotype was still affected by the initial size at time of planting. Other studies have found that initial seedling size affects total tree height and GLD after six years (South & Mason 1993) and after two years (Aspinwall et al 2011b).…”

Section: Discussionmentioning

confidence: 87%

See 1 more Smart Citation

Effect of seedling stock on the early stand development and physiology of improved loblolly pine (Pinus taeda L.) seedlings

Sharma¹,

Adams²,

Schuler³

et al. 2016

iForest

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, Don C Bragg (5) This study assessed the effects of spacing and genotype on the growth and physiology of improved loblolly pine (Pinus taeda L.) seedlings from three distinct genotypes planted in Drew County, Arkansas (USA). Genotype had a significant effect on survival and height. Clone CF Var 1 showed greater height and survival compared to other seedlings. Genotype had significant effects on uniformity in height both years and ground line diameter (GLD) first year. However, genotype had no significant effects on leaf water potential and coefficient variation of leaf water potential. These growth and physiology should be further studied to assess potential genetic differences among seedlings and to determine if they can be identified early for improved growth at later ages.

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Genetic effects on stand-level uniformity and above- and belowground dry mass production in juvenile loblolly pine

Cited by 50 publications

References 44 publications

Forest biodiversity, ecosystem functioning and the provision of ecosystem services

Forest biodiversity, ecosystem functioning and the provision of ecosystem services

UNIFORMIDADE ENTRE ÁRVORES DURANTE UMA ROTAÇÃO E SUA RELAÇÃO COM A PRODUTIVIDADE EM Eucalyptus CLONAIS

Effect of seedling stock on the early stand development and physiology of improved loblolly pine (Pinus taeda L.) seedlings

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