The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Maksym Polyakov - One of the best experts on this subject based on the ideXlab platform.
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The geographical distribution of Plantation forests and land resources potentially available for pine Plantations in the U.S. South
Biomass & Bioenergy, 2010Co-Authors: Daowei Zhang, Maksym PolyakovAbstract:Abstract In this paper, we provide an assessment of Plantation forests and private land resources potentially available for pine Plantation development in 11 southern states of the United States. After a sustained growth for 50 years, Plantation forests (softwood and hardwood on both private and public lands) amounted to 18 million ha or 24 percent of all timberlands in these states in 2007. The vast majority of the Plantation forests were established on private lands with fast-growing loblolly pines and slash pines. While purposeful hardwood Plantations were rare, there were hardwood stands growing on failed pine Plantation sites. Using a two-stage Markov land use transition model, we forecast that private forest land in these states will decline about 7 percent or from 66 million ha in 1997 to 61 million ha in 2027, primarily due to urbanization, and that private pine Plantations will rise nearly 40 percent from 11 million ha to 16 million ha. Further, growth in pine Plantations will decline in coming decades, and states with low population and population growth have the greatest increase in Plantations. These Plantations, along with other woody biomass, are expected to play an important role in the emerging bio-energy sector.
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The geographical distribution of Plantation forests and land resources potentially available for pine Plantations in the U.S. South
Biomass and Bioenergy, 2010Co-Authors: Daowei Zhang, Maksym PolyakovAbstract:In this paper, we provide an assessment of Plantation forests and private land resources potentially available for pine Plantation development in 11 southern states of the United States. After a sustained growth for 50 years, Plantation forests (softwood and hardwood on both private and public lands) amounted to 18 million ha or 24 percent of all timberlands in these states in 2007. The vast majority of the Plantation forests were established on private lands with fast-growing loblolly pines and slash pines. While purposeful hardwood Plantations were rare, there were hardwood stands growing on failed pine Plantation sites. Using a two-stage Markov land use transition model, we forecast that private forest land in these states will decline about 7 percent or from 66 million ha in 1997 to 61 million ha in 2027, primarily due to urbanization, and that private pine Plantations will rise nearly 40 percent from 11 million ha to 16 million ha. Further, growth in pine Plantations will decline in coming decades, and states with low population and population growth have the greatest increase in Plantations. These Plantations, along with other woody biomass, are expected to play an important role in the emerging bio-energy sector. © 2010 Elsevier Ltd. All rights reserved.
Florencia Montagnini - One of the best experts on this subject based on the ideXlab platform.
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facilitating regeneration of secondary forests with the use of mixed and pure Plantations of indigenous tree species
Forest Ecology and Management, 2002Co-Authors: Nelida J Carnevale, Florencia MontagniniAbstract:Abstract The establishment of tree Plantations on degraded lands can facilitate the regeneration of native species that could not otherwise grow in open micro sites or in competition by herbaceous species. The present research investigated tree regeneration under mixed and pure Plantations of native species at La Selva Biological Station in the Atlantic humid lowlands of Costa Rica. The highest abundance of regenerating tree individuals was found in the understory of the mixed Plantation (composed of Hieronyma alchorneoides+Vochysia ferruginea+Balizia elegans+Genipa americana) with 10,156 individuals/ha, followed by pure Plantation of H. alchorneoides with 7891, V. ferruginea with 5703, B. elegans with 4219, G. americana with 1484, and the natural regeneration control with 703 individuals/ha. The highest mean number of species was found in the understory of the mixed Plantation (11 species in 32 m2), followed by pure Plantation of V. ferruginea (8.0), H. alchorneoides (7.0), B. elegans (5.0), G. americana (3.0) and control (1.0). Melastomataceae was the most abundant family in the understory of the mixed Plantation and in the pure Plantation of V. ferruginea, while Rubiaceae was the most abundant under H. alchorneoides. In constrast, Piperaceae was the most abundant family under pure Plantations of G. americana and B. elegans. In addition, species of primary forest of the region were found in the understory of the mixed Plantation and under the pure Plantations of H. alchorneoides and V. ferruginea. These are promising indicators for the use of these Plantations as accelerators of natural forest succession in the region. Very few woody species were found in the control, natural regeneration plots. Factors that may impede the establishment of woody species in the control may be the lack of perches for seed dipersers and invasion by herbaceous vegetation which outcompetes the tree seedlings in their growth.
Meixiang Shao - One of the best experts on this subject based on the ideXlab platform.
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carbon storage capacity of monoculture and mixed species Plantations in subtropical china
Forest Ecology and Management, 2013Co-Authors: Youjun He, Zhiyong Li, Xingyun Liang, Meixiang ShaoAbstract:Abstract Mixed-tree Plantations can be a good silvicultural alternative to large-scale monoculture coniferous Plantations for climate change mitigation, which is facilitated by the sequestration of atmospheric carbon dioxide. To evaluate the impacts of tree species compositions on the carbon storage capacity of Plantation ecosystems, we measured the above and belowground biomass, as well as the carbon content, in three 27-year old forest Plantations of monoculture Castanopsis hystrix (CH stand), monoculture Pinus massoniana (PM stand), and mixed C. hystrix and P. massoniana (mixed CH/PM stand) stands. We developed an allometric equation to estimate tree carbon storage. The carbon storage levels of understory, litter, and soil components were also estimated. Results show that biomass is positively correlated with carbon storage. The ecosystem carbon storage of the mixed CH/PM stand (327.03 Mg ha −1 ) was higher than those of the CH (314.59 Mg ha −1 ) and PM (293.60 Mg ha −1 ) stands. The majority of carbon storage was found in the soil pool (84.73%, 63.54%, and 75.80% in the CH, PM and mixed CH/PM stands, respectively). Almost 40% of soil carbon at a depth of 0–60 cm was stored in the upper 20 cm of the soil pool. Except for the vegetation layer, each layer of the CH and mixed CH/PM stands consisted of a higher amount of carbon than did the layers of the PM stand. These findings suggest that mixed CH/PM Plantation stands or valuable indigenous CH Plantation stands more substantially improve carbon storage in litter, soil, and ecosystems than do monoculture PM Plantation stands. The results also imply that developing valuable indigenous tree species is a good silvicultural option for enhancing carbon sequestration and valuable timber cultivation in subtropical China.
Micai Zhong - One of the best experts on this subject based on the ideXlab platform.
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ecosystem carbon storage and soil organic carbon stability in pure and mixed stands of cunninghamia lanceolata and michelia macclurei
Plant and Soil, 2013Co-Authors: Qingkui Wang, Silong Wang, Micai ZhongAbstract:Background and aims Across the world, about 264 million ha forest Plantations are monospecific. This practice has been found to cause site productivity and soil fertility decline in the regions where forests have been harvested several times. To mitigate these problems, mixed-species Plantations, especially with broadleaved and coniferous species, are preferred. Understanding the effects of introducing broadleaved tree in monospecific coniferous Plantation on ecosystem carbon (C) storage and soil organic C (SOC) stability is critical to improve our understanding of forest C sequestration and C cycle.
Jonathan M Adams - One of the best experts on this subject based on the ideXlab platform.
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Impact of logging and forest conversion to oil palm Plantations on soil bacterial communities in borneo
Applied and Environmental Microbiology, 2013Co-Authors: Larisa Lee-cruz, David P. Edwards, Binu M Tripathi, Jonathan M AdamsAbstract:Tropical forests are being rapidly altered by logging and cleared for agriculture. Understanding the effects of these land use changes on soil bacteria, which constitute a large proportion of total biodiversity and perform important ecosystem functions, is a major conservation frontier. Here we studied the effects of logging history and forest conversion to oil palm Plantations in Sabah, Borneo, on the soil bacterial community. We used paired-end Illumina sequencing of the 16S rRNA gene, V3 region, to compare the bacterial communities in primary, once-logged, and twice-logged forest and land converted to oil palm Plantations. Bacteria were grouped into operational taxonomic units (OTUs) at the 97% similarity level, and OTU richness and local-scale α-diversity showed no difference between the various forest types and oil palm Plantations. Focusing on the turnover of bacteria across space, true β-diversity was higher in oil palm Plantation soil than in forest soil, whereas community dissimilarity-based metrics of β-diversity were only marginally different between habitats, suggesting that at large scales, oil palm Plantation soil could have higher overall γ-diversity than forest soil, driven by a slightly more heterogeneous community across space. Clearance of primary and logged forest for oil palm Plantations did, however, significantly impact the composition of soil bacterial communities, reflecting in part the loss of some forest bacteria, whereas primary and logged forests did not differ in composition. Overall, our results suggest that the soil bacteria of tropical forest are to some extent resilient or resistant to logging but that the impacts of forest conversion to oil palm Plantations are more severe.
