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Journal articles on the topic 'Seedling dynamics'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Chen, Jian Neng, Jia Wei Wu, Jun Ye, Xiang Fu, and Xiao Fu Fang. "Dynamic Modeling and Analysis of Seven-Bar Seedling Planting Mechanism of Transplanting Machine." Applied Mechanics and Materials 574 (July 2014): 230–38. http://dx.doi.org/10.4028/www.scientific.net/amm.574.230.

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Seven-bar seedling planting mechanism is one kind of developed transplanting mechanism of vegetable seedling transplanting machines. Dynamic equations of the link rods were established and analysis program was compiled so as to analyze the dynamic characteristics of the mechanism; Meanwhile, simulation model of the mechanism was established and corresponding virtual dynamic test was conducted based on Adams. The consistency between calculation results based on kinematic theory model and simulation results achieved from Adams was proved through comparison, which verified the dynamics model was

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El-Keblawy, Ali, K. H. Shaltout, J. Lovett-Doust, and A. Ramadan. "Population dynamics of an Egyptian desert shrub, Thymelaea hirsuta." Canadian Journal of Botany 75, no. 12 (1997): 2027–37. http://dx.doi.org/10.1139/b97-914.

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Natural populations of the evergreen shrub, Thymelaea hirsuta (L.) Endl., were studied over 6 years at five desert habitats, in terms of seedling recruitment and adult survival and as a function of plant size and gender class. Habitat and time significantly influenced mortality of both reproductive and non-reproductive plants. Plant size also significantly affected adult mortality. Seedling recruitment varied significantly with habitat and year and approached zero some years. Significant among-year and among-population variation in population growth rates were observed over the 6 years of stud

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Burton, Philip J., Jesy Simons, Steve Brittingham, Daniel B. Thompson, Darin W. Brooks, and Lawrence R. Walker. "Regeneration dynamics of Great Basin bristlecone pine in southern Nevada." Canadian Journal of Forest Research 50, no. 6 (2020): 589–94. http://dx.doi.org/10.1139/cjfr-2019-0404.

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Great Basin bristlecone pine (Pinus longaeva D.K. Bailey) is an important and long-lived tree species found at high elevations in the interior southwest of the United States, but little is known about its regeneration requirements and response to disturbance. We conducted extensive surveys of seedling regeneration and environmental attributes of regeneration sites in undisturbed forest dominated by this species in the Spring Mountains of southern Nevada. Additional surveys tallied new seedling densities and site attributes 4 years after a wildfire in the same area. Seedlings, saplings, and juv

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4

Arrieta, S., and F. Suárez. "Seedling diversity and spatially related regenaration dynamics in holly woodlands and surrounding habitats." Web Ecology 2, no. 1 (2001): 38–46. http://dx.doi.org/10.5194/we-2-38-2001.

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Abstract. Spatial patterns of seedling distribution and diversity were analysed in small fragments of holly Ilex aquifolium L. woodlands and in their surrounding areas. Two sampling locations with similar structure were selected for this study: Oncala and Robregordo. They consist of nearly monospecific Ilex stands surrounded by grasslands with high scrub abundance. The seedling appearance of woody species was quantified from March to November 1998. Sampled areas were: 1) closed holly canopy; 2) open holly canopy or small forest gaps; 3) holly woodland edge; 4) surrounding grassland; 5) under i

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5

de Steven, Diane. "Tropical tree seedling dynamics: recruitment patterns and their population consequences for three canopy species in Panama." Journal of Tropical Ecology 10, no. 3 (1994): 369–83. http://dx.doi.org/10.1017/s0266467400008038.

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ABSTRACTA study of seedling demography of three shade-tolerant canopy tree species (Quararibea asterolepis, Trichilia tuberculata, and Tetragastris panamensis) was initiated to integrate with long-term studies of tree fruit production and of tree population dynamics on Barro Colorado Island, Panama. Over a five-year period, all seedlings (height <50 cm) and small saplings (height ≥50 cm to dbh 1 cm) were measured and monitored in permanent tree-centred transects (N = 10–11 trees per species). Survival rates increased with plant size class and were similar among species. Maximum height growt

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Martín, Guiomar, and Paula Duque. "Tailoring photomorphogenic markers to organ growth dynamics." Plant Physiology 186, no. 1 (2021): 239–49. http://dx.doi.org/10.1093/plphys/kiab083.

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Abstract When a dark-germinated seedling reaches the soil surface and perceives sunlight for the first time, light signaling is activated to adapt the plant’s development and transition to autotrophism. During this process, functional chloroplasts assemble in the cotyledons and the seedling’s cell expansion pattern is rearranged to enhance light perception. Hypocotyl cells expand rapidly in the dark, while cotyledon cell expansion is suppressed. However, light reverses this pattern by activating cell expansion in cotyledons and repressing it in hypocotyls. The fact that light-regulated develop

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Witharama, W. R. G., Robert E. L. Naylor, and G. P. Whytock. "Influence of Planting Date and Microsite on Weed Dynamics in Sugarcane in Sri Lanka." Weed Science 55, no. 1 (2007): 23–29. http://dx.doi.org/10.1614/ws-05-110.1.

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Experiments were conducted in Sri Lanka to compare weed seedling emergence in three sugarcane plots of 0.1 ha planted in October 1995, January 1996, and April 1996. In each plot, weed seedling emergence was monitored for 20 wk in five permanent quadrats on each of three microsites: on ridges, in furrows, and on adjacent fallow land. Soil moisture (0 to 5 cm) and soil temperature (at 2.5 cm) were also recorded. Only crowfootgrass, swamp millet, and guineagrass (all grasses) occurred in all nine planting time-by-microsite combinations. About half of all seedlings emerging over the three planting

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Marler, Thomas E., and Gil N. Cruz. "Extreme Wind Events Influence Seed Rain and Seedling Dynamics of Guam’s Serianthes nelsonii Merr." Tropical Conservation Science 12 (January 2019): 194008291985376. http://dx.doi.org/10.1177/1940082919853764.

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The seasonal aspects of Guam’s Serianthes nelsonii seed rain quantity, new seedling emergence, and lifespan of newly emerged seedlings were determined by direct observations. Two high wind events in January and September 2013 generated 63% of the annual number of new seeds collected in litterfall. A defoliating tropical cyclone in May 2015 generated an abrupt increase in seedling emergence with 17% of the annual new seedling count emerging during the 4-week period after the tropical cyclone. Of the annual count of seedlings that lived longer than 2 weeks, 8% of them emerged during the 7 months

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9

Seiwa, Kenji, and Kihachiro Kikuzawa. "Phenology of tree seedlings in relation to seed size." Canadian Journal of Botany 69, no. 3 (1991): 532–38. http://dx.doi.org/10.1139/b91-072.

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Vertical growth patterns and leaf dynamics of seedlings of 31 deciduous broad-leaved tree species with different seed sizes were examined under either open or shaded conditions. Seed size positively affected initial seedling height and leaf longevity, and negatively affected duration of leaf emergence and leaf-turnover rate. Large-seeded species completed shoot elongation and almost all of their annual leaf production in a short period, irrespective of shading. Small-seeded species attained maximum heights similar to those of large-seeded species under open conditions by having a longer durati

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Coyle, David R., William J. Mattson, Alexander L. Friend, and Kenneth F. Raffa. "Effects of an invasive herbivore at the single plant scale do not extend to population-scale seedling dynamics." Canadian Journal of Forest Research 44, no. 1 (2014): 8–16. http://dx.doi.org/10.1139/cjfr-2013-0307.

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A complex of nine invasive weevils has established in the northern hardwood forests of the Great Lakes Region. These weevils have become the numerically dominant arthropod fauna in the lower vegetation strata of this ecosystem. Effects of these folivorous adults and rhizophagous larvae on seedling survival and density are unknown. We measured the impact of adult weevil defoliation on individual sugar maple (Acer saccharum Marshall) seedlings, the numerically dominant flora in these stands. Over 14 500 seedlings were measured to examine the effects of larval abundance, adult abundance, and adul

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Magnucka, Elżbieta G., Stanisław J. Pietr, and Robert Zarnowski. "Dynamics of alkylresorcinols during rye caryopsis germination and early seedling growth." Zeitschrift für Naturforschung C 70, no. 3-4 (2015): 71–73. http://dx.doi.org/10.1515/znc-2014-4194.

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Abstract Among secondary metabolites, alkylresorcinols are considered particularly important for the antimicrobial defense system in cereal grains. Dry rye caryopses and young seedlings contain detectable quantities of resorcinolic lipids. Overall, 11 distinct alkylresorcinol homologues were identified, which showed variable profiles during rye germination and early seedling development, especially with reference to the production of very long homologues and to side chain saturation. Additionally, changes in the alkylresorcinol composition during rye seedling growth are presented for the first

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Oshima, Chiaki, Yuji Tokumoto, and Michiko Nakagawa. "Biotic and abiotic drivers of dipterocarp seedling survival following mast fruiting in Malaysian Borneo." Journal of Tropical Ecology 31, no. 2 (2014): 129–37. http://dx.doi.org/10.1017/s026646741400073x.

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Abstract:South-East Asian tropical rain forests experience sporadic, but profuse, seed production after general flowering, leading to the synchronous emergence of various seedlings and subsequent seedling dynamics, which play a crucial role in determining species distribution and coexistence. We examined the relative importance of both biotic (initial height, conspecific seedling density) and abiotic (canopy openness, per cent sand, soil water content) drivers using survival data for 1842 seedlings of 12 dipterocarp species for 1.5 y following mast fruiting in an old-growth Bornean tropical ra

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Silva, Paulo S. D., Inara R. Leal, Rainer Wirth, Felipe P. L. Melo, and Marcelo Tabarelli. "Leaf-cutting ants alter seedling assemblages across second-growth stands of Brazilian Atlantic forest." Journal of Tropical Ecology 28, no. 4 (2012): 361–68. http://dx.doi.org/10.1017/s0266467412000259.

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Abstract:Secondary forests promote an increased abundance of leaf-cutting ants (LCA) but the consequences on forest dynamics have been poorly addressed. Here we examine seedling assemblage attributes, seed germination and seedling survival across foraging zones of Atta cephalotes colonies inhabiting 15 second-growth patches (25–47 y old) of Atlantic forest. Seeds and seedlings were monitored within foraging zones and control sites over 1 y, including spots around ant nests. Overall, 1862 seedlings from 108 plant species were recorded. Seedling density decreased by 53% in foraging-zone plots (3

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Andrade, Gisiane Camargo de, Cileide Maria Medeiros Coelho, and Matheus Santin Padilha. "Seed reserves reduction rate and reserves mobilization to the seedling explain the vigour of maize seeds." Journal of Seed Science 41, no. 4 (2019): 488–97. http://dx.doi.org/10.1590/2317-1545v41n4227354.

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Abstract: Understanding how the seed reserve dynamics occurs during germination and seedling formation is determinant for advancements on seed technology. The aims of this study were: to verify which accelerated ageing temperature is the most effective to separate the vigour levels of maize seeds and to evaluate the reserves dynamics during germination and seedling formation process. Seven maize cultivars were submitted to the germination rate, accelerated ageing, thousand seed weight, total seedling length, shoot and root length, dry matter of seed and seedling, remaining dry matter in the en

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15

Balke, T., T. J. Bouma, P. M. J. Herman, E. M. Horstman, C. Sudtongkong, and E. L. Webb. "Cross-shore gradients of physical disturbance in mangroves: implications for seedling establishment." Biogeosciences 10, no. 8 (2013): 5411–19. http://dx.doi.org/10.5194/bg-10-5411-2013.

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Abstract. Mangroves may grow in an active sedimentary environment and are therefore closely linked to physical coastal processes. Seedlings colonize dynamic tidal flats, after which mangroves have the potential to change their physical environment by attenuating hydrodynamic energy and trapping sediments. Disturbance from hydrodynamic energy of waves or currents and the resulting sediment dynamics appear to be a critical bottleneck for seedling establishment on tidal flats and at the forest fringe. However, knowledge about the mechanisms at the single plant level and the spatial pattern of dis

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Balke, T., T. J. Bouma, P. M. J. Herman, E. M. Horstman, C. Sudtongkong, and E. L. Webb. "Cross-shore gradients of physical disturbance in mangroves: implications for seedling establishment." Biogeosciences Discussions 10, no. 3 (2013): 5361–83. http://dx.doi.org/10.5194/bgd-10-5361-2013.

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Abstract. Mangroves grow in an active sedimentary environment and are therefore closely linked to physical coastal processes. Seedlings colonize dynamic tidal flats, after which mangroves have the potential to change their physical environment by attenuating hydrodynamic energy and trapping sediments. Disturbance from hydrodynamic energy of waves or currents and the resulting sediment dynamics appear to be a critical bottleneck for seedling establishment on tidal flats and at the forest fringe. However, knowledge about the mechanisms at the single plant level and the spatial pattern of disturb

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17

Woods, Kerry D. "Living long by staying small: stem layering as an adaptive life-history trait in shade-tolerant tree seedlings." Canadian Journal of Forest Research 38, no. 3 (2008): 480–87. http://dx.doi.org/10.1139/x07-136.

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Suppressed seedling banks are important in replacement dynamics in late-successional forests. However, demographic properties of seedling populations are poorly known, and there has been little attention to traits that might affect fitness in suppressed seedlings. Acer saccharum Marsh., a shade-tolerant dominant in eastern North American forests, frequently develops adventitious roots along prostrate portions of stems (“layering”). Measurements of Acer seedlings in old-growth forests in Michigan indicate that layered seedlings proportionally reduce structural allocations to older layered stem

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18

Chejara, V. K., P. Kristiansen, B. M. Sindel, R. D. B. Whalley, and C. Nadolny. "Seed-bank and seedling dynamics in Hyparrhenia hirta are influenced by herbicide application and mowing management." Rangeland Journal 34, no. 2 (2012): 199. http://dx.doi.org/10.1071/rj11057.

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Hyparrhenia hirta (L.) Stapf (Coolatai grass) is a summer-active, C4 perennial tussock grass, native to southern Africa and the Mediterranean region, which has invaded areas of native flora in Australia in recent decades. Understanding its seed and seedling dynamics and how various management treatments (e.g. mowing, herbicide and no management) affect these may assist in identifying the conditions and management strategies required to limit its invasion. The population dynamics of H. hirta have not been comprehensively studied previously. A 2-year field experiment (December 2005–December 2007

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Pereira, Welison Andrade, Sara Maria Andrade Pereira, and Denise Cunha Fernandes dos Santos Dias. "Dynamics of reserves of soybean seeds during the development of seedlings of different commercial cultivars." Journal of Seed Science 37, no. 1 (2015): 63–69. http://dx.doi.org/10.1590/2317-1545v37n1142202.

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Physiological quality and vigor of the seeds comprise properties that determine a high level of activity and performance during germination and seedling emergence, having a direct relation with the establishment of the stand of a crop. In this context, the assessment of seedling development, including the analysis of the seed reserves mobilization are a reliable method to investigate the physiological potential of seed lots. In this preliminary study, the aim was to investigate the dynamics of seed reserves mobilization of a sample of soybean commercial cultivars. By means of the seedling leng

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20

Kim, Lim, and Yun. "Dynamics of Abies Nephrolepis Seedlings in Relation to Environmental Factors in Seorak Mountain, South Korea." Forests 10, no. 8 (2019): 702. http://dx.doi.org/10.3390/f10080702.

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We present novel evidence of environmental drivers of seedling density in Abies nephrolepis, an alpine and subalpine tree species. Continuous monitoring of natural conditions is required to understand forest ecosystem dynamics. We investigated Abies nephrolepis seedling dynamics in relation to biotic and abiotic factors. The survey, which included the measurement of trees and seedlings, was carried out from March to October in 2016 and 2018. Monitoring sites in the coniferous forests of Seorak Mountain were divided into 27 quadrats. We analyzed relationships using simple and multiple linear re

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Wu, Yun, Margaret R. Gale, Peter J. Cattelino, Dana L. Richter, and Johann N. Bruhn. "Temporal dynamics of ectomycorrhizal populations and seedling characteristics on red pine (Pinusresinosa)." Canadian Journal of Forest Research 23, no. 5 (1993): 810–15. http://dx.doi.org/10.1139/x93-105.

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To assess temporal dynamics of ectomycorrhizae (ECM) on red pine (Pinusresinosa Ait.) seedlings, numbers of ECM per gram of dry root were compared with temporal changes in seedling height, basal diameter, above- and below-ground (coarse root) biomass, shootroot ratio, and leaf water potentials. Bare-root red pine seedlings (3-0 stock) planted on three sites in upper Michigan in June of 1984 were destructively sampled on a monthly basis (May–October) from 1985 to 1989. Three morphological types (brown, black, and white) of ECM were observed and counted. Average numbers of total and brown-type E

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Lambers, Janneke Hille Ris, and James S. Clark. "Effects of dispersal, shrubs, and density-dependent mortality on seed and seedling distributions in temperate forests." Canadian Journal of Forest Research 33, no. 5 (2003): 783–95. http://dx.doi.org/10.1139/x03-001.

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Processes limiting recruitment of trees may have large impacts on forest dynamics. In this paper, we determined the effects of dispersal, shrubs (Rhododendron maximum), and density-dependent mortality on seed and seedling distributions of Southern Appalachian trees. We quantified the spatial distribution of seed rain, seed bank densities, first-year seedlings, and older than first-year seedlings in five vegetation plots. We fit models to these data assuming effects of limited dispersal, R. maximum (an understory shrub), and (or) density-dependent mortality (as well as a null model with none of

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McIvor, John G., and Chris J. Gardener. "Population dynamics of Stylosanthes hamata and S. scabra in north-eastern Queensland: effects of superphosphate application, timber treatment, and stocking rate." Australian Journal of Agricultural Research 49, no. 7 (1998): 1027. http://dx.doi.org/10.1071/a98023.

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The effects of pasture management (superphosphate application, timber treatment, stocking rate) on the herbage yields and population dynamics (seed production, seedling numbers, plant longevity) of Stylosanthes hamata cv. Verano and S. scabra cv. Seca grown in grass-legume mixtures were measured from 1982 to 1992 at 2 sites, Hillgrove (extractable phosphorus, 50 mg/kg) and Cardigan (extractable phosphorus, 6 mg/kg), near Charters Towers, north-eastern Queensland. Stylosanthes hamata was higher yielding during the first 3 years at both sites but subsequently S. scabra produced the larger yields

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Koch, Linda. "Epigenome dynamics from seed to seedling." Nature Reviews Genetics 18, no. 11 (2017): 637. http://dx.doi.org/10.1038/nrg.2017.78.

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DiTommaso, Antonio, Lindsey R. Milbrath, Scott H. Morris, Charles L. Mohler, and Jeromy Biazzo. "Seedbank Dynamics of Two Swallowwort (Vincetoxicum) Species." Invasive Plant Science and Management 10, no. 2 (2017): 136–42. http://dx.doi.org/10.1017/inp.2017.10.

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Pale swallowwort and black swallowwort are European viny milkweeds that have become invasive in many habitats in the northeastern United States and southeastern Canada. A multiyear seedbank study was initiated in fall 2011 to assess annual emergence of seedlings and longevity of seeds of pale swallowwort and black swallowwort at four different burial depths (0, 1, 5, and 10 cm) over 4 yr. One hundred swallowwort seeds were sown in seed pans buried in individual pots, and emerged seedlings were counted and removed from May through September each year. A subset of seed pans was retrieved annuall

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Huang, Fengmin, Minxia Liang, Yi Zheng, et al. "Soil nitrogen availability intensifies negative density-dependent effects in a subtropical forest." Journal of Plant Ecology 13, no. 3 (2020): 281–87. http://dx.doi.org/10.1093/jpe/rtaa012.

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Abstract Aims The importance of density-dependent mortality in maintaining tree species diversity is widely accepted. However, density-dependent effects may vary in magnitude and direction with different abiotic conditions in forests. Theoretical predictions surmise that density-dependent effects may vary with soil available nitrogen (AN), but this still needs to be tested. Methods We analyzed the density-dependent effects on survival of newly germinated seedlings for 18 common species based on a long-term seedling census across environmental gradients in a subtropical forest. We also conducte

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Parent, Sylvain, Marie-Josée Simard, Hubert Morin, and Christian Messier. "Establishment and dynamics of the balsam fir seedling bank in old forests of northeastern Quebec." Canadian Journal of Forest Research 33, no. 4 (2003): 597–603. http://dx.doi.org/10.1139/x02-194.

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This study examines balsam fir (Abies balsamea (L.) Mill.) recruitment in old fir stands. Studying the regeneration of these stands is essential to understand the regeneration dynamic of the species in the absence of stand-destroying disturbances. The objectives were (1) to obtain substrateseedling associations for different age-classes and according to the presence or absence of adventitious roots; (2) to evaluate the contribution of the seed rain to seedling recruitment; (3) to re-examine age structures using the most appropriate method that minimizes estimation errors due to the presence o

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McGuire, Krista L. "Recruitment dynamics and ectomycorrhizal colonization of Dicymbe corymbosa, a monodominant tree in the Guiana Shield." Journal of Tropical Ecology 23, no. 3 (2007): 297–307. http://dx.doi.org/10.1017/s0266467406003968.

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The dynamics of early life-history stages are important for understanding regional diversity patterns in tropical trees. In this study, patterns of seed removal, seedling survival and ectomycorrhizal (ECM) colonization in monodominant and mixed tropical rain forests in Guyana were investigated during a masting event of an ECM monodominant tree, Dicymbe corymbosa. Two seed densities (1 m−2 and 6 m−2) were tested in two forest types (monodominant versus mixed) with 10 plots per treatment (40 plots total). Germination success, seed and seedling survival after 1 y were measured for the monodominan

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Cardina, John, and Heather M. Norquay. "Seed production and seedbank dynamics in subthreshold velvetleaf (Abutilon theophrasti) populations." Weed Science 45, no. 1 (1997): 85–90. http://dx.doi.org/10.1017/s0043174500092511.

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The impact of seed production by subthreshold weed populations on future weed problems has impeded the adoption of integrated pest-management principles for weed management. Studies were conducted in fields with no velvetleaf history to determine how seedbanks and seedling populations change following seed production 1 yr or 5 consecutive yr in plow-disk and no-tillage corn. Cumulative seed production by 0.19 velvetleaf plants m−2increased in a linear fashion from 1989 to 1994, with annual additions averaging from 330 seeds m−2for velvetleaf in corn to 2,500 seeds m−2for velvetleaf without com

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Thorpe, H. C., and V. R. Timmer. "Early growth and nutrient dynamics of planted Pinus banksiana seedlings after slash-pile burning on a boreal forest site." Canadian Journal of Soil Science 85, no. 1 (2005): 173–80. http://dx.doi.org/10.4141/s04-011.

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Containerized jack pine (Pinus banksiana Lamb.) seedlings were planted in 10 paired slash-pile-burn and control plots established on a recent clearcut in north eastern Ontario to assess early impacts of intensive fire on soils and plant growth and nutrition. Root zone soil and seedlings were sampled one growing season after planting. The control seedlings exhibited modest growth without gain in N content, indicating reliance on internal nutrient reserves for growth on this low-fertility site. Slash-pile burning reduced seedling mortality, and markedly increased height, rootcollar diameter, and

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Anderson, Randy L. "Weed Seedling Emergence and Survival as Affected by Crop Canopy." Weed Technology 22, no. 4 (2008): 736–40. http://dx.doi.org/10.1614/wt-08-073.1.

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This study measured impact of cool-season crops on seedling emergence, survival, and seed production of weeds common in corn and soybean. Weed dynamics were monitored in permanently marked quadrats in winter wheat, spring wheat, and canola. Three species, green foxtail, yellow foxtail, and common lambsquarters, comprised more than 80% of the weeds observed in the study. Seedling emergence was reduced by winter wheat, but not by spring wheat or canola, when compared with adjacent quadrats without a crop canopy. Approximately 10% of seedlings in spring wheat and canola developed into seed-bearin

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Fumanal, B., I. Gaudot, and F. Bretagnolle. "Seed-bank dynamics in the invasive plant,Ambrosia artemisiifoliaL." Seed Science Research 18, no. 2 (2008): 101–14. http://dx.doi.org/10.1017/s0960258508974316.

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AbstractThe seed-bank dynamics ofAmbrosia artemisiifolia(Asteraceae), an annual invasive plant introduced from North America to Europe, were studied in nine French populations developing in field crops, set-asides or wastelands. The vertical distribution of seeds was studied in two different depth sections (0–5 cm and 5–20 cm), and the spatial horizontal pattern of distribution was analysed for two selected field-crop and set-aside populations. The proportions of dormant, non-dormant and dead seeds, as well as the changes in seed-bank dormancy over time, were evaluated. Natural seedling recrui

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Quoreshi, M., and V. R. Timmer. "Growth, nutrient dynamics, and ectomycorrhizal development of container-grownPicea marianaseedlings in response to exponential nutrient loading." Canadian Journal of Forest Research 30, no. 2 (2000): 191–201. http://dx.doi.org/10.1139/x99-208.

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Containerized black spruce (Picea mariana (Mill.) BSP) seedlings fertilized conventionally (12.5 mg N/plant) or exponentially (12.5, 25, or 50 mg N/plant) and inoculated with Hebeloma crustuliniforme (Bull. Ex St-Amans) Quel. or Laccaria bicolor (R. Mre.) Orton were periodically monitored for a 20-week greenhouse rotation to assess growth dynamics, steady-state N and P nutrition, and ectomycorrhizal development. Growth and nutrient accumulation increased exponentially for the exponential regimes and more linearly for the conventional regime, although final biomass was similar except for the lo

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Collet, Catherine, Henri Frochot, Jean-Marc Guehl, and André Ferhi. "Effect of two forest grasses differing in their growth dynamics on the water relations and the growth of Quercus petraea seedlings." Canadian Journal of Botany 74, no. 10 (1996): 1562–71. http://dx.doi.org/10.1139/b96-189.

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Interference between 1-year-old sessile oak (Quercus petraea (Mattus.) Liebl.) seedlings and two grass species (Agrostis stolonifera L. and Deschampsia cespitosa (L.) Beauv.) was evaluated during 3 years after seedling transplantation. The seedlings were grown in large containers under crossed levels of watering regimes (regular irrigation that maintained the soil at field capacity or seasonal water stress) and grass competition (with Agrostis, Deschampsia, or bare soil). After 3 years, seedling basal diameter was 2.5 times greater in the absence of competing vegetation than with one of the tw

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Metz, Margaret R., Liza S. Comita, Yu-Yun Chen, et al. "Temporal and spatial variability in seedling dynamics: a cross-site comparison in four lowland tropical forests." Journal of Tropical Ecology 24, no. 1 (2008): 9–18. http://dx.doi.org/10.1017/s0266467407004695.

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Abstract:Spatial and temporal variation in seedling dynamics was assessed using records of community-wide seedling demography collected with identical monitoring methods at four tropical lowland forests in Panama, Malaysia, Ecuador and French Guiana for periods of between 3 and 10 y. At each site, the fates of between 8617 and 391 777 seedlings were followed through annual censuses of the 370–1008 1-m2 seedling plots. Within-site spatial and inter-annual variation in density, recruitment, growth and mortality was compared with among-site variability using Bayesian hierarchical modelling to det

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BRÉVAULT, T., H. GUIBERT, and K. NAUDIN. "PRELIMINARY STUDIES OF PEST CONSTRAINTS TO COTTON SEEDLINGS IN A DIRECT SEEDING MULCH-BASED SYSTEM IN CAMEROON." Experimental Agriculture 45, no. 1 (2009): 25–33. http://dx.doi.org/10.1017/s0014479708006972.

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SUMMARYThe present study evaluated the pest constraints of an innovative crop management system in Cameroon involving conservation tillage and direct seeding mulch-based strategies. We hypothesized that the presence of mulch (i) would support a higher density of phytophagous arthropods particularly millipedes as well as pathogenic fungi that cause severe damage to cotton seedlings and (ii) would reduce early aphid infestations. The impact of two cover-crop mulchesCalopogonium mucunoidesandBrachiaria ruziziensison the vigour of seedling cotton stands and arthropod damage was assessed in two ind

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Delissio, Lisa J., Richard B. Primack, Pamela Hall, and H. S. Lee. "A decade of canopy-tree seedling survival and growth in two Bornean rain forests: persistence and recovery from suppression." Journal of Tropical Ecology 18, no. 5 (2002): 645–58. http://dx.doi.org/10.1017/s0266467402002420.

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The population dynamics of 8500 shade-tolerant tree seedlings of 13 tree species were followed for 10 years at rain forests in Lambir Hills National Park and Bako National Park, Malaysian Borneo. Since these dipterocarp forests have lower rates of canopy gap formation than do rain forests elsewhere, tree seedling biology was predicted to differ. Approximately 50% of seedlings present in 1986 were still alive in 1996. Seven out of thirteen had seedling populations composed predominantly of individuals that were at least 10 years old. These seedlings can undergo alternating periods of relatively

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Khan, Afsheen. "Seedling diversity and spatial distribution of some conifers and associated tree species in highly disturbed Western Himalayan regions in Pakistan." Journal of Forest Science 67, No. 4 (2021): 175–84. http://dx.doi.org/10.17221/138/2020-jfs.

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This article encompasses the impacts of disturbance, regeneration potential of conifers and the dynamics of tree species seedlings along the spatial scale in Murree forest. The seedling status preferably of conifers along with associated broadleaved dominant tree species is determined by a quantitative evaluation of diversity functions. An empirical approach is applied to predicting the future of seedlings under stress as well as the current hypothetical appearance of seedlings in the forest. The need of analysing diversity of this forest is due to highly disturbed conditions there, and this p

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Bellette, Marc P., Ruth E. Lawrence, and Neal J. Enright. "The effect of burnt soils on growth of Xanthorrhoea glauca subsp. angustifolia (Xanthorrhoeaceae) seedlings in box-ironbark ecosystems, northern central Victoria." Australian Journal of Botany 63, no. 8 (2015): 657. http://dx.doi.org/10.1071/bt15041.

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Seedlings of Xanthorrhoea glauca subsp. angustifolia D.J.Bedford (Xanthorrhoeaceae) were grown in burnt, unburnt and ash-rich soils from the box-ironbark ecosystem, northern central Victoria. Analysis of root architecture and the chemistry of leaves and roots demonstrate that burning improves seedling biomass development and acquisition of nutrients. An increased uptake of zinc by seedlings after fire is thought to be ecologically important and may infer vesicular-arbuscular mycorrhizal associations. The early development of a secondary root system is likely to contribute to seedling survivors

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Long, Yanxin, Xiaodong Yang, Yuee Cao, et al. "Relationship between Soil Fungi and Seedling Density in the Vicinity of Adult Conspecifics in an Arid Desert Forest." Forests 12, no. 1 (2021): 92. http://dx.doi.org/10.3390/f12010092.

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Research Highlights: 1. Soil fungi have a higher influence on seedling density compared to soil environmental factors; 2. Host-specific pathogens and beneficial fungi affect seeding density via different influencing mechanisms. Background and Objectives: The growth and development of seedlings are the key processes that affect forest regeneration and maintain community dynamics. However, the influencing factors of seedling growth around their adult conspecifics are not clear in arid desert forests. Probing the intrinsic relations among soil fungi, soil environmental factors (pH, water content,

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Groninger, J. W., J. R. Seiler, S. M. Zedaker, and P. C. Berrang. "Photosynthetic response of loblolly pine and sweetgum seedling stands to elevated carbon dioxide, water stress, and nitrogen level." Canadian Journal of Forest Research 26, no. 1 (1996): 95–102. http://dx.doi.org/10.1139/x26-010.

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Seedling stands of loblolly pine (Pinustaeda L.) and sweetgum (Liquidambarstyraciflua L.) were grown in monoculture or mixed stands for two growing cycles in controlled-environment chambers. Treatments consisted of ambient (408 ppm) and elevated (806 ppm) CO2, concentrations, water-stressed and well-watered conditions, and low (20 kg N/ha) and high (215 kg N/ha) nitrogen application rates. Photosynthesis rates were measured under ambient and elevated cuvette CO2 concentrations for both whole stands and individual seedlings from these stands. Significant interactions between CO2 and water sugge

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Solé, Raphaële, Sofia Gripenberg, Owen T. Lewis, et al. "The role of herbivorous insects and pathogens in the regeneration dynamics of Guazuma ulmifolia in Panama." Nature Conservation 32 (February 6, 2019): 81–101. http://dx.doi.org/10.3897/natureconservation.32.30108.

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A significant proportion of the mortality of rainforest trees occurs during early life stages (seeds and seedlings), but mortality agents are often elusive. Our study investigated the role of herbivorous insects and pathogens in the early regeneration dynamics of Guazumaulmifolia (Malvaceae), an important tree species in agroforestry in Central America. We reared pre-dispersal insect seed predators from G.ulmifolia seeds in Panama. We also carried out an experiment, controlling insects and pathogens using insecticide and/or fungicide treatments, as well as seed density, and compared survivorsh

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Joley, Donald B., Donald M. Maddox, David M. Supkoff, and Aubrey Mayfield. "Dynamics of Yellow Starthistle (Centaurea solstitialis) Achenes in Field and Laboratory." Weed Science 40, no. 2 (1992): 190–94. http://dx.doi.org/10.1017/s0043174500057209.

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Studies were conducted to compare changes in germinability and/or viability of yellow starthistle achenes buried (in packets) in soil or stored dry in the laboratory, and to determine the rate of achene depletion from a soil seed bank. In one study, after 72 mo, 0 to 96% germinable achenes remained in packets buried 5 cm deep, and a mean above 99% after dry storage. In another study, total live (germinable plus viable) achenes declined from 100% at harvest to 77.6% after 24 mo of burial. Germinable pappus-bearing achenes remaining in packets increased with depth of burial. After 12 mo of buria

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Fukasawa, Y., Y. Komagata, and S. Ushijima. "Fungal wood decomposer activity induces niche separation between two dominant tree species seedlings regenerating on coarse woody material." Canadian Journal of Forest Research 47, no. 1 (2017): 106–12. http://dx.doi.org/10.1139/cjfr-2016-0218.

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Decomposition subsystems have an essential role in forest dynamics but few studies demonstrate the effect of microbial decay traits on seedling regeneration. In the present study, we focused on seedling regeneration on coarse woody material (CWM), which is an important regeneration site for forest tree species, and the effects of wood decay type according to fungal decay preference for wood structural components on seedling colonization. Effects of log properties including wood decay type and other environmental variables on seedling density were evaluated by ordination methods and generalized

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Cuevas, Jaime G. "Gap characteristics in relation to forest structure and implications for southern beech forest dynamics." Canadian Journal of Forest Research 33, no. 10 (2003): 1915–22. http://dx.doi.org/10.1139/x03-114.

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Gap characteristics, as well as forest structure, were investigated in Nothofagus pumilio (Poepp. et Endl.) Krasser stands on two slopes in Tierra del Fuego to test the following hypotheses: (i) there exists an altitudinal decline in tree height and stem diameter, (ii) this should result in gaps of decreasing size and abundance towards the upper forest, and (iii) this, in turn, should result in a longer suppressed growth of seedlings near the treeline (that is, an older seedling bank). Mean tree height on both slopes decreased significantly with increasing altitude from 21 to 11 m and from 13

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Badger, Kemuel S., and Irwin A. Ungar. "Life history and population dynamics of Hordeum jubatum along a soil salinity gradient." Canadian Journal of Botany 69, no. 2 (1991): 384–93. http://dx.doi.org/10.1139/b91-053.

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This study examined the importance of the timing of germination and of seedling survival in determining the distribution of Hordeum jubatum along a soil salinity gradient. Survival and reproduction of mature plants were also observed over a 3-year period. Field observations indicated that seedling survival did not limit the distribution of H. jubatum except under unusually dry conditions. Seedlings were long-lived and persisted at salinities unfavorable for growth and reproduction. The two germination cohorts of H. jubatum are important in maintaining populations in the unpredictable environme

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Yagihashi, Tsutomu, Tatsuya Otani, Naoki Tani, et al. "Habitats suitable for the establishment of Shorea curtisii seedlings in a hill forest in Peninsular Malaysia." Journal of Tropical Ecology 26, no. 5 (2010): 551–54. http://dx.doi.org/10.1017/s026646741000026x.

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Trees of the family Dipterocarpaceae dominate the emergent canopy of most lowland rain forests in Asia (Ashton et al. 1988). The family is, therefore, one of the most ecologically important in South-East Asia. Shorea curtisii Dyer ex King is the most common tree species in the hill dipterocarp forests of Peninsular Malaysia (Burgess 1975, Symington 2004), and is considered a key species for the dynamics of such forests. Currently, most Malaysian hill forests are selectively logged. Trees over 50 cm dbh are harvested, and any subsequent harvests depend on the remaining smaller trees. Such selec

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Newbery, D. M., G. B. Chuyong, L. Zimmermann, and C. Praz. "Seedling survival and growth of three ectomycorrhizal caesalpiniaceous tree species in a Central African rain forest." Journal of Tropical Ecology 22, no. 5 (2006): 499–511. http://dx.doi.org/10.1017/s0266467406003427.

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Tree recruitment is determined in part by the survivorship and growth of seedlings. Two seedling cohorts of the three most abundant caesalpiniaceous species forming groves at Korup, Cameroon, were followed from 1995/1997 to 2002, to investigate why Microberlinia bisulcata, the most abundant species, currently has very few recruits compared with Tetraberlinia korupensis and T. bifoliolata. Numbers of seedlings dying, and the heights and leaf numbers of survivors, were recorded on 30 occasions. Survivorship after 2.5 y was 30% for M. bisulcata and 59% for the similar Tetraberlinia spp. together.

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Peltonen-Sainio, Pirjo, Katri Pahkala, Hannu Mikkola, and Lauri Jauhiainen. "Seed loss and volunteer seedling establishment of rapeseed in the northernmost European conditions: potential for weed infestation and GM risks." Agricultural and Food Science 23, no. 4 (2014): 327–39. http://dx.doi.org/10.23986/afsci.41530.

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Rapeseed soil seed bank development and volunteer plant establishment represent substantial risk for crop infestation and GM contamination. This study was designed to complement such investigations with novel understanding from high latitude conditions. Four experiments were designed to characterise seed loss at harvest, persistence, viability and capacity for volunteer seedling establishment, as well as impact of management measures on soil seed bank dynamics. Oilseed rape was the primary crop investigated due to the availability of GM cultivars and because of the increasing importance. Harve

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Eriksson, Ove. "Seedling Dynamics and Life Histories in Clonal Plants." Oikos 55, no. 2 (1989): 231. http://dx.doi.org/10.2307/3565427.

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