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Journal articles on the topic 'Seedling regeneration'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

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 (January 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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2

Béland, Martin, Yves Bergeron, and Richard Zarnovican. "Natural regeneration of jack pine following harvesting and site preparation in the Clay Belt of northwestern Quebec." Forestry Chronicle 75, no. 5 (October 1, 1999): 821–31. http://dx.doi.org/10.5558/tfc75821-5.

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A 36-ha experiment was carried out to assess the possibility of naturally regenerating jack pine stands following harvesting on clay soils of northwestern Quebec. Although differences between treatments were not statistically significant, there was a trend toward a positive effect of one treatment combining on-site delimbing and scarification with the Silva Wadell™ cone scarifier on jack pine seedling density (up to 10 000/ha) and distribution (50% of 1 m2 plots with at least one seedling, corresponding to 94% with 4 m2 plots), two years after harvest. However, scarified microsites contained f

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3

Johnson and Yeakley. "Microsites and Climate Zones: Seedling Regeneration in the Alpine Treeline Ecotone Worldwide." Forests 10, no. 10 (October 3, 2019): 864. http://dx.doi.org/10.3390/f10100864.

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Microsites, local features having the potential to alter the environment for seedling regeneration, may help to define likely trends in high-elevation forest regeneration pattern. Although multiple microsites may exist in any alpine treeline ecotone (ATE) on any continent, some microsites appear to enhance density of seedling regeneration better than others. Known seedling regeneration stresses in the ATE include low temperature, low substrate moisture, high radiation, drought, wind, and both high and low snowfall amount. Relationships among various microsite types, annual temperature, annual

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Peters, Vernon S., and Darcy R. Visscher. "Seed Availability Does Not Ensure Regeneration in Northern Ecosystems of the Endangered Limber Pine." Forests 10, no. 2 (February 10, 2019): 146. http://dx.doi.org/10.3390/f10020146.

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Research Highlights: When biotic interactions such as disease alter both the seed production capacity of stands, and seedling survivorship, the relative importance of seed availability versus substrate specificity may alter future regeneration opportunities for plant populations. Background and Objectives: We investigated the importance of disease severity, seed availability, and substrate limitation to the regeneration dynamics of the endangered limber pine, Pinus flexilis, in two ecosystems with varying forest composition, and different histories of white pine blister rust infection (WPBR; C

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5

St-Pierre, Hélène, Réjean Gagnon, and Pierre Bellefleur. "Distribution spatiale de la régénération après feu de l'épinette noire (Picea mariana) et du pin gris (Pinus banksiana) dans la forêt boréale, Réserve faunique Ashuapmushuan, Québec." Canadian Journal of Botany 69, no. 4 (April 1, 1991): 717–21. http://dx.doi.org/10.1139/b91-097.

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Post-fire spatial distribution of black spruce (Picea mariana (Mill.) BSP) and jack pine (Pinus banksiana Lamb.) regenerations were studied in the Réserve faunique Ashuapmushuan, Quebec. The main factors analysed were (i) effects of organic matter thickness on growth and regneration, (ii) spatial distribution type of the regeneration, (iii) effects of burned stems on this distribution, and (iv) links between spatial distribution of the regeneration and the thickness of the post-fire residual organic matter. A strong correlation was observed between the presence of seedlings and the thickness o

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Alfaro-Sibaja, Laura, Daniela Barquero-Salgado, Alicia Fonseca, Randall A. Montoya-Solano, Vanesa Morales-Cerdas, and Daniel Ramírez-Arce. "Vegetation structure and composition of mangrove Palo Seco Quepos, Costa Rica." UNED Research Journal 7, no. 2 (December 15, 2015): 325–32. http://dx.doi.org/10.22458/urj.v7i2.1161.

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The Palo Seco mangrove in the Pacific coast of Costa Rica is in a tropical wet forest-perhumid forest transition. The nearby human population and tourism are threatening its borders. We studied mangrove’s structure, composition and regeneration as a base for future comparisons. We sampled eight 10m x 10m plots. Within them, 1m2 and 16 m2 plots were established to measure seedlings and saplings. We measured 153 trees in an 800 m2 area, with an average density of 0,19 ± 0,12 Ind/m2. Avicennia germinans was the dominant species, and Avicennia bicolor the less abundant. While seed- ling’s basal ar

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7

Youngblood, Andrew P. "Effect of shelterwood removal methods on established regeneration in an Alaska white spruce stand." Canadian Journal of Forest Research 20, no. 9 (September 1, 1990): 1378–81. http://dx.doi.org/10.1139/x90-182.

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Seedling damage during overstory removal was compared among different yarding methods; almost three times more mortality was associated with rubber-tired ground skidding than with skyline cable yarding. Seedlings ranging in height from 0.4 to 1.0 m generally received less damage or had lower mortality rates from cable yarding than did shorter or taller seedlings. Snowpack disturbance and percentage of seedling mortality were positively correlated. Results suggested that with attention to seedling height growth and yarding method, the shelterwood regeneration system is a viable option for white

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8

Lunt, Ian D., Heidi C. Zimmer, and David C. Cheal. "The tortoise and the hare? Post-fire regeneration in mixed Eucalyptus - Callitris forest." Australian Journal of Botany 59, no. 6 (2011): 575. http://dx.doi.org/10.1071/bt11151.

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Seedling regeneration after a high intensity wildfire was assessed in a mixed forest dominated by Eucalyptus species and Callitris endlicheri (Parl.) F.M. Bailey. Patterns were compared against the ‘slow seedling’ or ‘tortoise-and-hare’ theory of competitive interactions between gymnosperms and angiosperms. Browsing effects were documented using fenced plots, and seedling density, mortality and height were assessed over 6 years, from 2004–10. Consistent with expectations, Eucalyptus seedlings grew faster than Callitris seedlings in most situations. Callitris seedlings grew faster and produced

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9

Brose, Patrick H. "A comparison of the effects of different shelterwood harvest methods on the survival and growth of acorn-origin oak seedlings." Canadian Journal of Forest Research 41, no. 12 (December 2011): 2359–74. http://dx.doi.org/10.1139/x11-143.

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Timely development of newly germinated oak (Quercus spp.) seedlings into competitive-sized regeneration is an essential part of the oak regeneration process. The amount of sunlight reaching the forest floor partly governs this development, and foresters often use the shelterwood system to expose oak seedlings to varying degrees of insolation. To further understand the seedling development–sunlight–shelterwood relationships, I conducted a multiyear study at five locations in Pennsylvania. Each location had four stands either uncut or recently treated with one of three shelterwood harvest method

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10

Jones, Robert H., Ralph D. Nyland, and Dudley J. Raynal. "Response of American Beech Regeneration to Selection Cutting of Northern Hardwoods in New York." Northern Journal of Applied Forestry 6, no. 1 (March 1, 1989): 34–36. http://dx.doi.org/10.1093/njaf/6.1.34.

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Abstract Root sprout and seedling regeneration of American beech was sampled in two maple-dominated northern hardwood stands 13-14 years after single-tree selection cutting. The largest stems had been advance regeneration, and seedlings comprised a substantial and well-distributed portion of these. Among stems established after the cut, root sprouts outnumbered seedlings. Total beech regeneration abundance was correlated with basal area of overstory beech. For long-term beech control, it may be useful to reduce beech seedling populations before selection cutting, and to cut large diameter beec

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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 (June 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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Taylor, Alan H., Zisheng Qin, and Jie Liu. "Tree regeneration in an Abiesfaxoniana forest after bamboo dieback, Wang Lang Natural Reserve, China." Canadian Journal of Forest Research 25, no. 12 (December 1, 1995): 2034–39. http://dx.doi.org/10.1139/x95-220.

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Bamboos in the understory of Abiesfaxoniana Render & Wilson forests in China impede tree regeneration when they are mature. However, bamboos die back every few decades and may synchronize tree seedling establishment on the forest floor. Tree seedling regeneration patterns were studied beneath 20 canopy gaps and adjacent closed forest in an old-growth A. faxoniana forest where understory bamboos died back in 1976. Most seedlings of A. faxoniana, Acercaudatum Wallich, and Betulautilis D. Don in gaps established 2 years after dieback of the bamboo Fargesiadenudata Yi. Acercaudatum seedlings i

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Rahman, Md Rayhanur, MK Hossain, Md Akhter Hossain, and Mohammad Emran Hasan. "Natural regeneration potential of Madhupur National Park, Bangladesh." Bangladesh Journal of Botany 49, no. 4 (December 31, 2020): 989–96. http://dx.doi.org/10.3329/bjb.v49i4.52515.

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Natural regeneration is an essential tool to evaluate the overall health of a forest ecosystem. Natural regeneration of the tree species in Madhupur National Park showed 47 regenerating tree species among which Shorea robusta has maximum density (18,046 seedlings per ha) followed by Aporosa sp., whereas minimum density (19 seedling per ha) was recorded for Cassia nodosa, Litsea glutinosa, Grewia asiatica and Syzygium cumini, respectively. Relative density, relative frequency and relative abundance were estimated to assess the Importance Value Index (IVI) of the seedlings of different tree spec

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14

Kingery, J. L., and R. T. Graham. "The Effect of Cattle Grazing on Ponderosa Pine Regeneration." Forestry Chronicle 67, no. 3 (June 1, 1991): 245–48. http://dx.doi.org/10.5558/tfc67245-3.

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During the summer and fall of 1982, a study was established on the Nez Percé National Forest in central Idaho to assess the effects of cattle grazing on the performance of a new ponderosa pine (Pinus ponderosa Laws.) plantation. Three study sites were located in a Douglas-fir/ninebark (Pseudotsuga menziesii/Physocarpus malvaceus) habitat type. Results after six years showed that livestock use can influence tree seedling establishment. Mortality and damage to tree seedlings from cattle resulted primarily from trampling rather than from browsing. Five and one-half percent of the seedlings were d

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15

Štícha, V., I. Kupka, D. Zahradník, and S. Vacek. "Influence of micro-relief and weed competition on natural regeneration of mountain forests in the Šumava Mountains." Journal of Forest Science 56, No. 5 (May 28, 2010): 218–24. http://dx.doi.org/10.17221/28/2009-jfs.

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Natural regeneration and its relationship to micro-relief and weed competition were studied on 6 research plots in mountain spruce forests in the &Scaron;umava Mountains. The data on density regeneration, total height and height increment of each seedling were recorded on 50 by 5 m transects. The position of each seedling was adjusted by a satellite system "Field map". The data show that an elevation is a significantly (significance level P = 0.99) preferable micro-relief for seedlings in most cases (7 of the total 9 cases). The regeneration density is low in a high-competition environment

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16

Battaglia, L. L., B. S. Collins, and P. B. Weisenhorn. "Quercus michauxii regeneration in and around aging canopy gaps." Canadian Journal of Forest Research 34, no. 6 (June 1, 2004): 1359–64. http://dx.doi.org/10.1139/x04-019.

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Floodplain forests are subject to frequent windstorms, which create canopy gaps and microtopographic heterogeneity. Forest regeneration may be enhanced when light and microtopographic conditions are both favorable, but slower growing canopy species may still require multiple disturbance events to reach the canopy. In 2001, we revisited a cohort of Quercus michauxii Nutt. seedlings planted in 1995 on pitmound microsites that were constructed in and around canopy gaps to determine patterns of seedling persistence and investigate the effects of canopy openness and microtopography on seedling sur

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17

Vasconcelos, Heraldo L., and J. Malcolm Cherrett. "Leaf-cutting ants and early forest regeneration in central Amazonia: effects of herbivory on tree seedling establishment." Journal of Tropical Ecology 13, no. 3 (May 1997): 357–70. http://dx.doi.org/10.1017/s0266467400010567.

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ABSTRACTThe effects of herbivory by the leaf-cutting antAtta laevigataFr. Smith on the re-establishment of forest trees in an abandoned farm near Manaus, central Amazonia, were investigated. Experimental seedling transplants and observations on seedlings which emerged naturally in the study area showed that damage by leaf-cutting ants negatively affected tree seedling survival and growth. However, excluding leaf-cutting ants from experimental plots for 20 mo did not significantly increase tree seedling densities. The number of seedlings emerging varied considerably between plots and this obscu

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18

Côté, Sylvie, and Louis Bélanger. "Variations de la régénération préétablie dans les sapinières boréales en fonction de leurs caractéristiques écologiques." Canadian Journal of Forest Research 21, no. 12 (December 1, 1991): 1779–95. http://dx.doi.org/10.1139/x91-246.

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The renewal of boreal fir stands after harvesting is related to the abundance of fir advanced regeneration. The objective of this study was to compare the advanced regeneration in 45-years-old balsam fir stands of second growth to determine if ecological site conditions could explain some regeneration problems noted in the balsam fir – white birch ecoclimatic domain. Seven ecological phases were studied; these are among the most common in the Laurentians north of Québec. On the basis of fir seedling densities (2 years old and more), three groups could be distinguished using a cluster analysis

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19

Gratzer, G., P. B. Rai, and G. Glatzel. "The influence of the bamboo Yushania microphylla on regeneration of Abies densa in central Bhutan." Canadian Journal of Forest Research 29, no. 10 (October 1, 1999): 1518–27. http://dx.doi.org/10.1139/x99-125.

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To assess the impact of a dense understory of the bamboo Yushania microphylla Munro on tree regeneration in monospecific Abies densa Griff. stands of the central Bhutan Himalayas, the age-class distribution of fir regeneration, the microsite preferences, and height growth as well as the relationship between height of the bamboo, gap fraction, and tree seedling density were studied. Seedling densities were much lower on sites with bamboo. Recruitment was more or less continuous, and there was no indication of overall synchronized single-cohort regeneration in bamboo plots. On sites with bamboo

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Bakken, Peter N., and James E. Cook. "Regeneration Potential of Six Habitat Types Common to North-Central Wisconsin." Northern Journal of Applied Forestry 15, no. 3 (September 1, 1998): 116–23. http://dx.doi.org/10.1093/njaf/15.3.116.

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Abstract The arboreal regeneration of 24 mature, fully stocked forests distributed among 6 common habitat types (Kotar et al. 1988) in north-central Wisconsin were studied. Nineteen of the stands were inventoried in 1992 and 1993; in 1993 an additional 5 stands were included. The density and composition of small (<25 cm) and large (25-150 cm) seedlings were determined, and the relationships of the understory and overstory were investigated. No significant (P < 0.05) differences were found for seedling densities of either size class among habitat types. This was due, in part, to the large

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Kimambo and Naughton-Treves. "The Role of Woodlots in Forest Regeneration outside Protected Areas: Lessons from Tanzania." Forests 10, no. 8 (July 25, 2019): 621. http://dx.doi.org/10.3390/f10080621.

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Promoting forest regeneration outside protected forests is an urgent challenge in densely settled, biodiverse areas like the East African Rift. Regenerating forests entails managing complex processes of ecological recovery as well as understanding the needs and motivations of local land users. Here, we evaluate pathways for attaining native tree regeneration across variable site conditions. We investigate two common strategies for attaining native tree regeneration—setting aside land for forest regeneration (‘Protect and Wait’) and native tree planting (‘Native Tree Planting’)—and a possible t

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Chesterfield, CJ, and RF Parsons. "Regeneration of Three Tree Species in Arid South-Eastern Australia." Australian Journal of Botany 33, no. 6 (1985): 715. http://dx.doi.org/10.1071/bt9850715.

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Grazing effects by introduced mammals on tree seedlings in the arid zone have caused concern for the long-term future of some tree species. This was investigated by measuring stem girths of Casuarina cristata Miq., Heterodendrum oleifoliurn Desf. and Myoporum platycarpum R.Br. in arid-zone wood- lands. Episodic seedling regeneration of Myoporum is inferred following series of wet years in the 1950s and 1970s. Although young Myoporum plants appear unpalatable to stock, regeneration may be sup- pressed by rabbit-grazing in some areas. Almost no Heterodendrurn seedlings were found but suckering w

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Kneeshaw, Daniel D., and Yves Bergeron. "Ecological factors affecting the abondance of advance regeneration in Quebec's southwestern boreal forest." Canadian Journal of Forest Research 26, no. 5 (May 1, 1996): 888–98. http://dx.doi.org/10.1139/x26-097.

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Boreal forest disturbance regimes have changed during the past century, in turn changing regeneration and stand dynamics of these forests. This is occurring at the same time that the forest industry is emphasizing operations that take advantage of pre-established natural regeneration. This study has therefore investigated the effect of various ecological factors on the abundance of Abiesbalsamea (L.) Mill., Piceaglauca (Moench) Voss, Piceamariana (Mill.) BSP, Thujaoccidentalis L., Betulapapyrifera Marsh., and Populustremuloides Michx. natural regeneration in some boreal stands in the Abitibi r

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Taylor, GB. "Effect of tillage practices on the fate of hard seeds of subterranean clover in a ley farming system." Australian Journal of Experimental Agriculture 25, no. 3 (1985): 568. http://dx.doi.org/10.1071/ea9850568.

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In a rotation of 1 year pasture/l year crop, a subterranean clover (Trifolium subterraneum cv. Daliak) pasture was either left untilled or subjected to minimum or conventional tillage. One set of tillage treatments was imposed in each ofthree crop years while another set of treatments was imposed in only the first crop year. Regenerating clover plants were prevented from setting seed. In the first crop, 44% of the clover seeds were buried below 2 cm of soil by minimum tillage; this proportion was 65% in the conventional tillage treatment. In the first pasture regeneration year, seedling densit

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Weisberg, Peter J., and William L. Baker. "Spatial variation in tree regeneration in the forest-tundra ecotone, Rocky Mountain National Park, Colorado." Canadian Journal of Forest Research 25, no. 8 (August 1, 1995): 1326–39. http://dx.doi.org/10.1139/x95-145.

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Ecotone vegetation may be especially sensitive to climate change. In particular, the invasion of subalpine meadows by tree seedlings has been well documented. However, there has been no systematic analysis of tree regeneration across the environmental heterogeneity of the alpine forest–tundra ecotone (FTE). Also, the position of the FTE may be relictual from more favorable climates of the past and therefore unresponsive to changing climate. To assess the environmental controls on FTE tree regeneration, to determine whether the ecotone might be relictual, and to determine whether tree invasion

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Schroder, Thomas, Anna Paula Lora Zimmermann, Lílian Daniel Pereira, Noé dos Santos Ananias Hofiço, Dilson Sousa Rocha Júnior, Frederico Dimas Fleig, and Evandro Alcir Meyer. "USING BARE-ROOT AND ROOTSTOCK SEEDLINGS FROM NATURAL REGENERATION OF CEDRELA FISSILIS." CERNE 22, no. 3 (September 2016): 309–16. http://dx.doi.org/10.1590/01047760201622032203.

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ABSTRACT The success of forest creation relies on seedling availability and quality. The aim of this research is to assess the possible use of rootstock and bare-root seedlings of Cedrela fissilis obtained from natural regeneration for direct field planting. We used Generalized Linear models to assess survival and Hierarchical Models to assess height growth over one year after planting. Initial root-collar diameter (RCD) and treatment (rootstock or bare-root) affected survival and growth. Rootstock and larger seedlings presented higher levels of survival and growth. Higher seedling quality in

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Fukasawa, Yu, Yoko Ando, Satoshi N. Suzuki, Mineaki Aizawa, and Daisuke Sakuma. "Climate influences the effect of fungal decay type on regeneration of Picea jezoensis var. hondoensis seedlings on decaying logs." Canadian Journal of Forest Research 50, no. 1 (January 2020): 73–79. http://dx.doi.org/10.1139/cjfr-2019-0147.

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Hondo spruce (Picea jezoensis var. hondoensis (Mayr) Rehder)) is separately distributed among several mountainous regions in central Japan as remnant populations of the last glacial period. To identify factors that affect Hondo spruce seedling regeneration on decaying logs, we investigated the relationships between climatic conditions, log properties, including decay type by fungi, and Hondo spruce seedling density on logs using data from seven subalpine Hondo spruce forests in central Japan. The results showed that the presence of soft rot was associated with higher seedling density, and the

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Kreider, Mark R., Karen E. Mock, and Larissa L. Yocom. "Methods for Distinguishing Aspen Seedlings from Suckers in the Field." Journal of Forestry 118, no. 6 (July 6, 2020): 561–68. http://dx.doi.org/10.1093/jofore/fvaa030.

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Abstract Quaking aspen is a common component of postdisturbance landscapes, in part because of its ability to regenerate via asexual suckers. Previously viewed as exceedingly rare in the western United States, sexual seedling establishment is increasingly seen as another important natural regeneration pathway for aspen, because sexual regeneration increases genetic diversity and facilitates long-distance dispersal. However, aspen seedling research is hampered by difficulties in visually distinguishing seedlings from suckers in the field, and few resources exist to guide managers and researcher

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Fromm, Michael, Matthias Schubert, Guillermo Castilla, Julia Linke, and Greg McDermid. "Automated Detection of Conifer Seedlings in Drone Imagery Using Convolutional Neural Networks." Remote Sensing 11, no. 21 (November 4, 2019): 2585. http://dx.doi.org/10.3390/rs11212585.

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Monitoring tree regeneration in forest areas disturbed by resource extraction is a requirement for sustainably managing the boreal forest of Alberta, Canada. Small remotely piloted aircraft systems (sRPAS, a.k.a. drones) have the potential to decrease the cost of field surveys drastically, but produce large quantities of data that will require specialized processing techniques. In this study, we explored the possibility of using convolutional neural networks (CNNs) on this data for automatically detecting conifer seedlings along recovering seismic lines: a common legacy footprint from oil and

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Castro, Jorge, and Alexandro Leverkus. "Effect of Herbaceous Layer Interference on the Post-Fire Regeneration of a Serotinous Pine (Pinus pinaster Aiton) across Two Seedling Ages." Forests 10, no. 1 (January 20, 2019): 74. http://dx.doi.org/10.3390/f10010074.

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Herbaceous vegetation is a major source of interference with the regeneration of woody species. This is particularly the case after forest fires, as a dense herbaceous layer usually regenerates naturally. Although the competitive effect of the herbaceous vegetation upon tree seedlings has been widely studied, there are still gaps in knowledge for management related to the effect of tree seedling age and size on the outcome of the interaction. In this study, we seek to determine the response of maritime pine (Pinus pinaster Aiton) seedlings to herbaceous competition at two different seedling ag

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Mendel, Z., F. Assael, N. Saphir, A. Zehavi, D. Nestel, and G. Schiller. "Seedling Mortality in Regeneration of Aleppo Pine Following Fire and Attack by the Scale Insect Matsucoccus josephi." International Journal of Wildland Fire 7, no. 4 (1997): 327. http://dx.doi.org/10.1071/wf9970327.

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Mortality of Pinus halepensis seedlings was investigated in Israel during the first years of natural regeneration after fire, with special emphasis on the role of Matsucoccus josephi, drought and competition. The investigations were conducted in the native natural forest on Mt. Carmel, and in a plantation severely damaged by the scale insect at Horeshim in Samaria. M josephi was the dominant mortality agent during the first five years after regeneration, killing almost 73 % and 54% of the seedlings at Mt. Carmel and Horeshim, respectively. Neither injury nor mortality due to the scale insect w

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Kreyling, Juergen, Andreas Schmiedinger, Ellen Macdonald, and Carl Beiekuhnlein. "Potentials of Natural Tree Regeneration after Clearcutting in Subalpine Forests." Western Journal of Applied Forestry 23, no. 1 (January 1, 2008): 46–52. http://dx.doi.org/10.1093/wjaf/23.1.46.

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Abstract Regeneration of interior mountain forests still is not adequately understood, although these forests are subject to intensified use over the last decades. We examined factors influencing the success of natural tree regeneration after harvesting in the Engelmann spruce–subalpine fir zone of the Monashee Mountains, British Columbia, Canada. Distance from the forest edge was an important factor for regeneration; at distances exceeding 70 m from the forest edge only 50% of plots showed sufficient natural regeneration to meet stocking targets compared with 90% of plots closer to forest edg

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Densmore, Roseann V., and James C. Page. "Paper Birch Regeneration on Scarified Logged Areas in Southcentral Alaska." Northern Journal of Applied Forestry 9, no. 2 (June 1, 1992): 63–66. http://dx.doi.org/10.1093/njaf/9.2.63.

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Abstract Density and growth of naturally regenerated paper birch seedlings were examined in relation to substrate and vegetative competition on two scarified logged sites on the Matanuska Valley Moose Range in southcentral Alaska. Seedling density was inversely related to extent of thick O horizon, grass cover, herb cover, distance to the nearest seed tree, and the extent of B horizon substrate, and positively related to seedling density and the extent of A horizon and moss cover. Paper birch seedlings did not establish on organic layers more than 2 cm thick. Paper birch seedlings grew much mo

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Dinis, Cati, Peter Surovy, Nuno A. Ribeiro, Rui Machado, and Maria R. G. Oliveira. "Cork Oak Seedling Growth under Different Soil Conditions from Fertilisation, Mycorrhizal Fungi and Amino Acid Application." Journal of Agricultural Science 8, no. 1 (December 7, 2015): 55. http://dx.doi.org/10.5539/jas.v8n1p55.

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<p class="TESE">Regeneration process deals with some constrains related with the livestock management, pasture rotations, and dependence of a sequence of favourable climatic years, among others, which can lead to a continuous delay in the initiation of the regeneration process. The purpose of this study is to promote an increase of cork oak seedling growth in order to decrease the time required for regeneration and also to contribute to avoid the effect of post-transplant stress on cork oak. With this objective, a study was carried out on a greenhouse, where the effect of fertilisation,

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Margolis, Hank A., and David G. Brand. "An ecophysiological basis for understanding plantation establishment." Canadian Journal of Forest Research 20, no. 4 (April 1, 1990): 375–90. http://dx.doi.org/10.1139/x90-056.

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Forest plantations in the early stages of establishment are considered as hierarchical biological systems, and some implications for the design of research projects and the education of regeneration foresters and scientists are discussed. Since less than optimum environmental conditions convey stress to seedlings, seedlings will in turn exhibit a strain response at either the biochemical, physiological, or morphological level. Environmental conditions in a clear-cut are contrasted with other regeneration niches, and implications for the performance of different plantation species are discussed

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36

Mao, Peili, Hongxiang Mu, Banghua Cao, Yuhong Liu, Zhaofei Fan, and Shumei Wang. "Effects of sand burial and overstory tree age on seedling establishment in coastal Pinus thunbergii forests in the northern Shandong Peninsula, China." Forestry Chronicle 92, no. 03 (June 2016): 357–65. http://dx.doi.org/10.5558/tfc2016-062.

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Coastal Pinus thunbergii (Japanese black pine) forests in the northern Shandong Peninsula of China recently experienced widespread natural regeneration failure. This study identifies critical factors that affect natural regeneration of P. thunbergii. Seeds from trees of various ages (13–32 years) were used to investigate the effects of age and burial depth in sand on germination and seedling establishment. Results show that seed density in 2–5 cm soil decreased with increased distance from the shoreline. Sand burial decreased seed germination but did not affect the relative growth rate of seed

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Buermeyer, Karl R., and Constance A. Harrington. "Fate of Overstory Trees and Patterns of Regeneration 12 Years After Clearcutting with Reserve Trees in Southwest Washington." Western Journal of Applied Forestry 17, no. 2 (April 1, 2002): 78–85. http://dx.doi.org/10.1093/wjaf/17.2.78.

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Abstract Changes in management objectives for some forestlands in the Pacific Northwest have spurred interest in the creation of multistoried stands and the use of natural regeneration systems, but data on such systems are lacking. We assessed the status of the overstory trees and the regeneration 12 yr after a clearcut harvest with reserve trees in an even-aged, 145-yr-old Douglas-fir stand on a moderately productive site (site class 3) in southwest Washington. The 15 ha harvest unit was superimposed over two areas differentially thinned 15 and 34 yr before clearcutting. The clearcut harvest

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Collins, Byron J., Charles C. Rhoades, Jeffery Underhill, and Robert M. Hubbard. "Post-harvest seedling recruitment following mountain pine beetle infestation of Colorado lodgepole pine stands: a comparison using historic survey records." Canadian Journal of Forest Research 40, no. 12 (December 2010): 2452–56. http://dx.doi.org/10.1139/x10-172.

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The extent and severity of overstory lodgepole pine ( Pinus contorta var. latifolia Engelm. ex Wats.) mortality from mountain pine beetle ( Dendroctonus ponderosae Hopkins) has created management concerns associated with forest regeneration, wildfire risk, human safety, and scenic, wildlife, and watershed resources in western North America. Owing to the unprecedented nature of the outbreak and associated management in the southern Rocky Mountains, it is unknown if the forests that regenerate after this current period of extensive change will differ from those that regenerated in the past. Here

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Youngblood, Andrew P., and John C. Zasada. "White spruce artificial regeneration options on river floodplains in interior Alaska." Canadian Journal of Forest Research 21, no. 4 (April 1, 1991): 423–33. http://dx.doi.org/10.1139/x91-057.

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Reforestation options for artificial regeneration of white spruce (Piceaglauca (Moench) Voss) were tested on three floodplain sites near Fairbanks, Alaska. Survival of containerized seedlings after outplanting was above 96%, regardless of harvest cutting method or mechanical site preparation, and declined little between the third and fifth growing seasons. Establishment and survival after direct seeding on seed spots was more variable and differed by harvest cutting method, by type of site preparation, and by the use of plastic seed shelters for seedling protection. Maximum terminal leader gro

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Alverson, William S., Marian V. Lea, and Donald M. Waller. "A 20-year experiment on the effects of deer and hare on eastern hemlock regeneration." Canadian Journal of Forest Research 49, no. 11 (November 2019): 1329–38. http://dx.doi.org/10.1139/cjfr-2019-0071.

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Eastern hemlock (Tsuga canadensis (L.) Carrière) is a shade-tolerant, slow-growing tree once common in forests across the Great Lakes region. It was heavily exploited in the late 19th and early 20th centuries and now experiences limited regeneration across much of its range. This failure to regenerate has been ascribed to poor seedbed conditions, insufficient canopy openings, warmer climate, and browsing by white-tailed deer (Odocoileus virginianus (Zimmermann, 1780)) or snowshoe hare (Lepus americanus Erxleben, 1777). To test whether deer or hare limit hemlock regeneration, we studied >200

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Burney, Owen, Michael G. Wing, and Robin Rose. "Microsite Influences on Variability in Douglas-Fir Seedling Development." Western Journal of Applied Forestry 22, no. 3 (July 1, 2007): 156–62. http://dx.doi.org/10.1093/wjaf/22.3.156.

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Abstract We examined the microsite characteristics of 6,048 Douglas-fir seedlings at three regeneration sites in Washington state. Our objective was to determine the microsite characteristics that were most influential on seedling growth change over time. We analyzed microsite influences both individually and in concert with one another through regression-based techniques. Microsite parameters included soil impedance, topographic, and physical parameter measurements that were recorded at each seedling's location. Akaike's information criterion (AIC) was used to determine combinations of micros

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Barna, M. "The effects of cutting regimes on natural regeneration in submountain beech forests: species diversity and abundance." Journal of Forest Science 54, No. 12 (December 15, 2008): 533–44. http://dx.doi.org/10.17221/42/2008-jfs.

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The paper summarizes the results of 15-year natural regeneration for beech of five plots with different densities situated in the Western Carpathians Mts. Three of the plots were subjected to differently intensive shelterwood cuttings (plots L, M, H), one plot was clear-cut (CC), and one was left without intervention – as a control (C). The number of one-year-old seedlings decreased proportionally with increasing cutting intensity. The ANOVA results document a significant influence of cutting intensity on the abundance of both one-year-old and older seedlings. The abundance of beech seedlings

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Vickers, Lance A., William H. McWilliams, Benjamin O. Knapp, Anthony W. D’Amato, Daniel C. Dey, Yvette L. Dickinson, John M. Kabrick, et al. "Are Current Seedling Demographics Poised to Regenerate Northern US Forests?" Journal of Forestry 117, no. 6 (August 28, 2019): 592–612. http://dx.doi.org/10.1093/jofore/fvz046.

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Abstract Securing desirable regeneration is essential to sustainable forest management, yet failures are common. Detailed seedling measurements from a forest inventory across 24 northern US states were examined for plausible regeneration outcomes following overstory removal. The examination included two fundamental regeneration objectives: 1) stand replacement- securing future forest and 2) species maintenance- securing upper canopy species. Almost half the plots lacked adequate seedlings to regenerate a stand after canopy removal and over half risked compositional shifts. Based on those advan

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Côté, Mathieu, Jean Ferron, and Réjean Gagnon. "Impact of seed and seedling predation by small rodents on early regeneration establishment of black spruce." Canadian Journal of Forest Research 33, no. 12 (December 1, 2003): 2362–71. http://dx.doi.org/10.1139/x03-167.

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Black spruce (Picea mariana (Mill.) BSP) postdispersal seed and juvenile seedling predation by small rodents (Peromyscus maniculatus (Wagner), Clethrionomys gapperi (Vigor), and Phenacomys intermedius (Merriam)) was assessed in three boreal habitats over a 2-year period using an extensive exclosurecontrol experiment. Small rodent relative abundance was measured during six periods using snap trapping. We found that seed and juvenile seedling predation by small rodents varied according to habitat type and over time. Indeed, seed predation was higher in sprucemoss forests than in other habitats

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Hart, V., M. Nentvichová-Hartová, and P. Tauchman. "Analysis of herbicide effects on Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration." Journal of Forest Science 56, No. 5 (May 28, 2010): 209–17. http://dx.doi.org/10.17221/77/2009-jfs.

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Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration under parent stand after weed suppression was investigated in the area of the Training Forest Enterprise in Kostelec nad Čern&yacute;mi lesy. The study evaluates two measurements made in a two-year interval. The parent stand, where Douglas fir grows in mixture with our domestic tree species, is one of the oldest and most productive stands at the Training Forest Enterprise in Kostelec nad Čern&yacute;mi lesy. Herbicides for the control of weeds were applied onto three permanent experimental plots under the parent st

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., Istomo, and Mia Afriyani. "PENDUGAAN POTENSI PEREKRUTAN PERMUDAAN ALAM OLEH POHON INDUK DI HUTAN MANGROVE IUPHHK-HA PT. BUMWI, TELUK BINTUNI, PAPUA BARAT Potential Estimation of Seedling Recruitment by Seed Trees in Mangrove Forest IUPHHKHA PT. BUMWI Bintuni Bay, West Papua." Journal of Tropical Silviculture 9, no. 1 (May 4, 2018): 69–77. http://dx.doi.org/10.29244/j-siltrop.9.1.69-77.

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Since 1978 one of the legal silviculture systems in Indonesian regard to managing mangrove forest is seed tree method. The ability of this silviculture system to recruit the seeds to fulfill the regeneration is one of the importantaspects. The research is conducted to get the information about regeneration condition and the ability of seed tree method to recruit the regeneration in any various plot with different agecutting. Vegetation analysis for naturalregeneration (seedlings and saplings) were conducted at four different age logged-over area with the total 640 plots. The plot size is 78.5

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Riikonen, Johanna, and Jaana Luoranen. "Seedling Production and the Field Performance of Seedlings." Forests 9, no. 12 (November 27, 2018): 740. http://dx.doi.org/10.3390/f9120740.

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The rapid establishment of seedlings in forest regeneration or afforestation sites after planting is a prerequisite for successful reforestation. The relationship between the quality of the seedling material and their growth and survival after outplanting has been recognized for decades. Despite the existence of a substantial amount of information on how to produce high-quality seedlings, there is still a need to develop practices that can be used in nurseries and at planting sites to be able to produce well-growing forest stands in ever-changing environments. This Special Issue of Forests is

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48

Lodge, GM. "The effects of native grass cover, species, herbicide and sowing method on legume establishment on the northern slopes of New South Wales." Australian Journal of Experimental Agriculture 31, no. 4 (1991): 485. http://dx.doi.org/10.1071/ea9910485.

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The effects of sowing method (direct drilling or broadcasting), level of cover of native grass and pre-sowing herbicide application on pasture legume introduction were evaluated from 1984 to 1987 at a low elevation (425 m) site on the Northern Slopes of New South Wales. Two perennial (Medicago sativa cv. CUF101 and Onobrychis viciijolia cv. Eski) and 3 annual legumes (Trifolium subterraneum ssp. brachycalycinum cv. Clare; M. truncatula cv. Sephi; Vicia villosa ssp. dasycarpa cv. Namoi) were sown each year from 1984 to 1986. Seedling establishment was measured 3-4 months after sowing, and where

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49

Kupka, I. "Natural regeneration at different microclimatic sites in Zatec region." Journal of Forest Science 48, No. 10 (May 22, 2019): 441–50. http://dx.doi.org/10.17221/11913-jfs.

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Natural regeneration is an important part of close-to-nature forestry. However, natural regeneration also has either natural or technological limits. Among the most important natural limits are a low sum of precipitation and site type. The study concentrates on Žatec region where the long term average sum of precipitation is only 440–450 mm per year. Dry periods during the vegetation time are quite frequent. The study was conducted on clear cut area, stand edge, shelterwood area and stand interior. The results showed the highest population densities in a shelterwood system, the lowest in the s

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McWilliams, William H., Susan L. Stout, Todd W. Bowersox, and Larry H. McCormick. "Adequacy of Advance Tree-Seedling Regeneration in Pennsylvania's Forests." Northern Journal of Applied Forestry 12, no. 4 (December 1, 1995): 187–91. http://dx.doi.org/10.1093/njaf/12.4.187.

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Abstract Measurement of tree seedlings and herbaceous vegetation from 499 sample locations across Pennsylvania revealed that advance tree-seedling regeneration is inadequate for new stand establishment across most of the State. The samples were located in stands from 40% to 75% stocked to focus on stands with ample light and growing space for establishment of abundant advance regeneration. A range of regeneration adequacy criteria was applied to the measurements. Using the least stringent criterion, a low density of stems of any tree species, resulted in 40% of the sample locations being adequ

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