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Restoring forests: regeneration and ecosystem function for the future

Conventions and policies for biodiversity conservation and climate change mitigation state the need for increased protection, restoration and climate change adaptation of forests. Much degraded land may be targeted for large-scale forest restoration, yet challenges include costs, a shortage of regeneration material and the need for restored forests to serve as a resource for...

Allocation of forest biomass across broad precipitation gradients in China’s forests

Forests act as major sinks for atmospheric CO2. An understanding of the relationship between forest biomass allocation and precipitation gradients is needed to estimate the impacts of changes in precipitation on carbon stores. Biomass patterns depend on tree size or age, making it unclear whether biomass allocation is limited by tree age at regional scales. Using a dataset of ten...

Forest regeneration in changing environments

Physiology (Coordinator: Douglass F. Jacobs, United States; Deputies: Barbara J. Hawkins, Canada and Pedro Villar-Salvador, Spain). Overview of papers in special issue The papers submitted and accepted for

Short-day photoperiods affect expression of genes related to dormancy and freezing tolerance in Norway spruce seedlings

Key Message Gene expression analysis showed that prolonged short day (SD) treatment deepened dormancy and stimulated development of freezing tolerance of Picea abies seedlings. Prolonged SD treatment also caused later appearance of visible buds in autumn, reduced risks for reflushing, and promoted earlier spring bud break. Context Short day (SD) treatment of seedlings is a common...

Bottles to trees: Plastic beverage bottles as an alternative nursery growing container for reforestation in developing countries

Reforestation is needed globally to help restore degraded sites, combat desertification, protect watersheds, and provide forest products. This involves planting forest tree seedlings grown in local nurseries, but technologies to produce quality seedlings are lacking in developing countries. Modern nursery containers used to propagate seedlings have internal-surface barriers (ribs...

Plantation performance of chestnut hybrids and progenitors on reclaimed Appalachian surface mines

Reclamation of surface mined sites to forests is a preferred post-mining land use option, but performance of planted trees on such sites is variable. American chestnut (Castanea dentata (Marsh.) Borkh.) is a threatened forest tree in the eastern USA that may become an important species option for mine reclamation. Chestnut restoration using backcross hybrids that incorporate...

Ontogeny influences developmental physiology of post-transplant Quercus rubra seedlings more than genotype

, Department of Forestry and Natural Resources, Purdue University , West Lafayette, IN , USA 2 Douglass F. Jacobs & Key message Seedling ontogeny exerted a greater influence on physiological activity of Quercus

Effects of root competition on development of chestnut and oak regeneration following midstory removal

R. Saunders 0 Douglass F. Jacobs 0 0 Department of Forestry and Natural Resources, Hardwood Tree Improvement and Regeneration Center, Purdue University , West Lafayette, IN 47907 , USA Partial

Forest restoration following surface mining disturbance: challenges and solutions

Many forested landscapes around the world are severely altered during mining for their rich mineral and energy reserves. Herein we provide an overview of the challenges inherent in efforts to restore mined landscapes to functioning forest ecosystems and present a synthesis of recent progress using examples from North America, Europe and Australia. We end with recommendations for...

Exploration of a rare population of Chinese chestnut in North America: stand dynamics, health and genetic relationships

With the transport of plants around the globe, exotic species can readily spread disease to their native relatives; however, they can also provide genetic resistance to those relatives through hybrid breeding programmes. American chestnut (Castanea dentata) was an abundant tree species in North America until its decimation by introduced chestnut blight. To restore chestnut in...

Editorial note

New Forests Douglass F. Jacobs 0 1 0 D. F. Jacobs (&) Hardwood Tree Improvement and Regeneration Center, Department of Forestry and Natural Resources, Purdue University , West Lafayette, IN 47907 ... -2061 , USA 1 Sincerely , Douglass F. Jacobs - It is with great excitement and anticipation that I assume the role of Editor-in-Chief of New Forests. I sincerely appreciate the dedication of Steve

Restoring forests: What constitutes success in the twenty-first century?

boreal forest tree species. Photo: Douglass F. Jacobs Fig. 3 Test plantation of American chestnut (Castanea dentata (Marsh.) Borkh.) trees that have been hybridized with Chinese chestnut (Castanea ... throughout its native range in eastern North America. Photo: Douglass F. Jacobs applications of genetics to forest restoration, i.e., assisted migration of provenances and species (Dawson et al. 2011; Williams

Relationship between above-ground biomass allocation and stand density index in Populus × euramericana stands

The relationships between above-ground stem, branch, leaf masses and stand density index (SDI) were analysed in Populus × euramericana (Dode) Guinier stands in Jiangsu Province, China. The allometric equations developed in this study accurately estimated masses of above-ground and specific above-ground tree components in stands with different SDIs. The relationship between the...