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Journal articles on the topic 'Seedling Abundance'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Kirika, Jasper Mbae, Katrin Böhning-Gaese, Bonny Dumbo, and Nina Farwig. "Reduced abundance of late-successional trees but not of seedlings in heavily compared with lightly logged sites of three East African tropical forests." Journal of Tropical Ecology 26, no. 5 (2010): 533–46. http://dx.doi.org/10.1017/s0266467410000283.

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Abstract:Logged forests form an increasingly large proportion of tropical landscapes but disproportionately few studies have studied the impact of forest disturbance, e.g. lightly vs. heavily logged, on tree and seedling communities simultaneously. We sampled all trees (on 1 ha) and all recently germinated seedlings (on 90 m2) in three lightly and three heavily logged sites in each of the following three East African tropical forests: Budongo Forest and Mabira Forest in Uganda and Kakamega Forest in Kenya. We analysed species richness, diversity, abundance and community composition of late- an

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2

Cline, E., B. Vinyard, and R. Edmonds. "Spatial effects of retention trees on mycorrhizas and biomass of Douglas-fir seedlings." Canadian Journal of Forest Research 37, no. 2 (2007): 430–38. http://dx.doi.org/10.1139/x06-229.

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Retention forestry places seedlings in proximity to residual trees, exposing seedlings to additional sources of ectomycorrhizal fungus (EMF) inoculum. To investigate this, Douglas-fir ( Pseudotsuga menziesii (Mirb.) Franco) seedlings were planted near (2–6 m) and far (16–30 m) from 44- to 72-year-old residual Douglas-fir trees in western Washington, USA. From 1998 through 2000, seedling shoot and root biomass was assessed and EMF taxa were identified using morphology and sequence analysis of internal transcribed spacer and large subunit ribosomal RNA genes. Seedlings near residual trees had si

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3

LePage, Philip T., Charles D. Canham, K. Dave Coates, and Paula Bartemucci. "Seed abundance versus substrate limitation of seedling recruitment in northern temperate forests of British Columbia." Canadian Journal of Forest Research 30, no. 3 (2000): 415–27. http://dx.doi.org/10.1139/x99-223.

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We examine the influence of (i) the spatial distribution and abundance of parent trees (as seed sources) and (ii) the abundance and favourability of seedbed substrates, on seedling recruitment for the major tree species in northwestern interior cedar-hemlock forests of British Columbia, under four levels of canopy openness (full canopy, partial canopy, large gap, and clearcut). Substrate distribution varied with canopy openness, and substrate favourability was a function of both canopy openness and seedling species. Lack of suitable substrates was the predominant factor limiting seedling densi

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4

Norden, Natalia, and Pablo R. Stevenson. "Influence of frugivore activity on the species abundance of seedlings and saplings in a lowland tropical forest in Colombia." Journal of Tropical Ecology 31, no. 4 (2015): 291–303. http://dx.doi.org/10.1017/s0266467415000164.

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Abstract:Although seed dispersal plays a critical role for plant regeneration, the long-term benefits of frugivores for recruitment success have been poorly explored. We evaluated the relative importance of tree species abundance and of frugivore-related factors for successful plant recruitment on 18 tree species in a lowland Colombian rain forest. We combined census data from four 1-ha plots of trees (>10 cm dbh), saplings (1–5 cm dbh) and seedlings (<1.7 m) with a dataset describing tree–frugivore interactions. Seedling abundance was higher for large-seeded species dispersed by the spi

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5

Botzat, Alexandra, Lena Fischer, and Nina Farwig. "Forest-fragment quality rather than matrix habitat shapes herbivory on tree recruits in South Africa." Journal of Tropical Ecology 29, no. 2 (2013): 111–22. http://dx.doi.org/10.1017/s0266467413000102.

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Abstract:Forest fragmentation can alter herbivory on tree recruits with possible consequences for regeneration. We assessed effects of forest-fragment quality (tree diversity, vegetation complexity, relative abundance of pioneer trees) and matrix habitat on arthropods and herbivory in KwaZulu-Natal, South Africa. We compared arthropod abundances and herbivory on woody seedlings and saplings among four forest-fragment types differing in size and matrix (large fragments and small fragments surrounded by natural grassland, eucalypt and sugarcane plantations; nplots = 24) using analyses of covaria

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6

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 (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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Ingersoll, Cheryl A., and Mark V. Wilson. "Buried propagule bank of a high subalpine site: microsite variation and comparisons with aboveground vegetation." Canadian Journal of Botany 71, no. 5 (1993): 712–17. http://dx.doi.org/10.1139/b93-082.

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We assessed the composition and spatial pattern of the persistent buried propagule bank (seeds and vegetative structures) of a treeline site in the Oregon Cascade Mountains. We monitored emergence from soil cores removed from four microsite types and recorded vegetation cover and seedling abundance on the site. Over 3100 seedlings/m2 emerged from the greenhouse soil cores; the seed bank was dominated by Juncus species. Few vegetative sprouts emerged. Vegetated microsites produced significantly more emergents than did bare soils, but even bare soils contained abundant seeds. Overall site cover

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8

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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9

Farris-Lopez, Krista, Julie S. Denslow, Barry Moser, and Heather Passmore. "Influence of a common palm, Oenocarpus mapora, on seedling establishment in a tropical moist forest in Panama." Journal of Tropical Ecology 20, no. 4 (2004): 429–38. http://dx.doi.org/10.1017/s0266467404001531.

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Plants often modify microsite conditions important for seedling establishment. In tropical moist forest, advance regeneration in the form of shade-suppressed seedlings is a major component of regrowth in new gaps. Tree seedlings may be filtered by the composition and structure of the forest understorey. In a lowland forest in Central Panama, we examined light availability, litter accumulation and the seedling community (abundance, diversity and composition) under and away from the canopies of a common subcanopy, clonal palm, Oenocarpus mapora, and tested whether seedling abundance varies as a

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10

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 (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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11

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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12

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 (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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13

Bzdyk, Roman, Jacek Olchowik, Marcin Studnicki, et al. "The Impact of Effective Microorganisms (EM) and Organic and Mineral Fertilizers on the Growth and Mycorrhizal Colonization of Fagus sylvatica and Quercus robur Seedlings in a Bare-Root Nursery Experiment." Forests 9, no. 10 (2018): 597. http://dx.doi.org/10.3390/f9100597.

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Every year there are changes in the register of fungicides available for forestry. It is proactive to develop a new strategy to minimise the application of chemical methods and replace them with natural and biological fungal control options. This study compares the influence after one growing season in a bare-root forest nursery of (a) effective microorganisms (EM) consisting of mixed cultures of beneficial and naturally-occurring microorganisms, (b) the organic fertilizer Actifos (Act), and (c) the mineral fertilizer Busz Forte (BF) on the growth and mycorrhizal colonization of two common for

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14

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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15

Marro, Nicolás, Florencia Soteras, Noelia Cofré, et al. "NEOTROPICAL TREE PRODUCTION: INSIGHTS INTO GERMINATION, GROWTH AND OUTPLANTING FOR Maytenus boaria." CERNE 23, no. 3 (2017): 377–85. http://dx.doi.org/10.1590/01047760201723032344.

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ABSTRACT Knowledge about tree production practices is essential to support forest restoration projects, but is still lacking for many tree species. Maytenus boaria is a neotropical tree distributed across the temperate and subtropical South American mountains. In central Argentina, it is mainly restricted to the most preserved forest remnants. Attempts to plant this species have had little success due to difficulties in seedling production and low seedling survival. We set up four trials aiming to identify the constraints of seedling production and outplanting. Under greenhouse conditions, we

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16

Jones, Elizabeth R., Lisa M. Curran, Debra D. Wright, and Andrew L. Mack. "Differential effects of mammalian seed predators on the regeneration of five Papua New Guinean tree species and implications for sapling recruitment." Journal of Tropical Ecology 24, no. 3 (2008): 259–67. http://dx.doi.org/10.1017/s026646740800494x.

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Abstract:Although herbivores may account for a significant source of seed and seedling mortality in many tropical tree species, plant species differ in their response to seed damage. Here we investigate the relative effects of seed predation on the regeneration of five tree species in a mid-elevation Papua New Guinean rain forest. Exclosure treatments and shade-house experiments were monitored from November 2004 to March 2006 to assess the differential effects of seed predation on seed viability and seedling growth. Results indicate that although seed predators attack all five focal species, t

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17

Mulugeta, Dawit, and Chris M. Boerboom. "Seasonal abundance and spatial pattern ofSetaria faberi, Chenopodium album, andAbutilon theophrastiin reduced-tillage soybeans." Weed Science 47, no. 1 (1999): 95–106. http://dx.doi.org/10.1017/s0043174500090718.

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A better understanding of the influence of various crop and weed management practices on spatiotemporal dynamics of weeds could improve the design of integrated weed management systems. We examined the influence of 18- and 76-cm soybean row spacings on emergence pattern and spatial aggregation of giant foxtail, common lambsquarters, and velvetleaf seedling cohorts. In addition, we characterized the soil seedbank and determined the quantitative and spatial relationship between the seedbank and seedling populations. Viable seeds of about 10 weed species and twice as many species of seedlings wer

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18

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 (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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Rojas, J. A., A. Witte, Z. A. Noel, J. L. Jacobs, and M. I. Chilvers. "Diversity and Characterization of Oomycetes Associated with Corn Seedlings in Michigan." Phytobiomes Journal 3, no. 3 (2019): 224–34. http://dx.doi.org/10.1094/pbiomes-12-18-0059-r.

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Corn is a staple feed and biofuel crop with a value close to $3.7 billion dollars for Michigan’s economy. Knowledge about distribution and abundance of seedling pathogens in Michigan corn fields is limited. Here we used a combination of culture-based and next-generation sequencing of soil samples to determine the extent of species associated with diseased corn seedlings and those present in soil. Over 2 years, symptomatic seedlings and associated soil samples were collected from 11 Michigan fields. A total of 170 oomycete cultures were obtained from seedlings using a semiselective medium (CMA-

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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 (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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Şen, İsmail, Yasmine Piñuela, Josu G. Alday, et al. "Mulch removal time did not have significant effects on Tuber melanosporum mycelium biomass." Forest Systems 30, no. 1 (2021): eSC02. http://dx.doi.org/10.5424/fs/2021301-17519.

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Aim of study: We aimed to i) evaluate the effects of mulching on Tuber melanosporum mycelium biomass and seedling growth (i.e. root collar diameter and seedling height) and ii) unravel the relationship between growth in root collar diameter and mycelium abundance, in a T. melanosporum plantation.Area of study: The experimental plantation is located in the Pre-Pyrenees mountains in Catalonia, Spain.Material and methods: The experimental plantation was established in 2010 using one-year-old T. melanosporum inoculated Quercus ilex seedlings. Double-layered mulch materials were placed around the s

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Bentz, Jo-Ann, and Alden M. Townsend. "Variation in Leafhopper Species Abundance and Diversity among Elm Seedlings and Cultivars." HortScience 40, no. 5 (2005): 1389–93. http://dx.doi.org/10.21273/hortsci.40.5.1389.

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A survey was conducted in the 2001 growing season to determine the leafhopper species composition, abundance, richness, diversity, and evenness among trees of three elm (Ulmus sp.) cultivars, two U.S. National Arboretum (USNA) seedling selections of U. szechuanica Fang, and two USNA seedling selections of U. bergmanniana Schneid. in a mixed stand. Yellow sticky traps were used to qualify and quantify the number of aerial leafhoppers from 1 May 2001 until 4 September 2001. A total of 4,523 individuals, belonging to 39 species within seven leafhopper subfamilies, were trapped. The weekly mean nu

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Gerna, Davide, Thomas Roach, Birgit Mitter, Wolfgang Stöggl, and Ilse Kranner. "Hydrogen Peroxide Metabolism in Interkingdom Interaction Between Bacteria and Wheat Seeds and Seedlings." Molecular Plant-Microbe Interactions® 33, no. 2 (2020): 336–48. http://dx.doi.org/10.1094/mpmi-09-19-0248-r.

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In endophytes, the abundance of genes coding for enzymes processing reactive oxygen species (ROS), including hydrogen peroxide (H2O2), argues for a crucial role of ROS metabolism in plant-microbe interaction for plant colonization. Here, we studied H2O2 metabolism of bread wheat (Triticum aestivum L.) seeds and their microbiota during germination and early seedling growth, the most vulnerable stages in the plant life cycle. Treatment with hot steam diminished the seed microbiota, and these seeds produced less extracellular H2O2 than untreated seeds. Using a culture-dependent approach, Pantoea

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Kennedy, Alan J., David F. Penner, and Jeffrey E. Green. "Small Rodent Populations and Conifer Seedling Damage on a Reclaimed Area in West Central Alberta." Forestry Chronicle 65, no. 4 (1989): 271–75. http://dx.doi.org/10.5558/tfc65271-4.

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Small rodent populations and conifer seedling survival were monitored on a reclaimed area in west central Alberta from September 1979 to September 1985. Although several species of cricetid rodents and shrews were captured during the live-trapping program, only meadow voles (Microtus pennsylvanicus) and deer mice (Peromyscus maniculatus) occurred in sufficient number to monitor annual changes in abundance. Meadow voles increased rapidly on the reclaimed area from 1979–1981, remained at high numbers until 1984, then declined sharply in 1985. Deer mice increased to moderate numbers from 1979–198

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Toledo-Aceves, Tarin, José G. García-Franco, Siunelly Landero Lozada, María Luisa León Mateos, and Keith MacMillan. "Germination and seedling survivorship of three Tillandsia species in the cloud-forest canopy." Journal of Tropical Ecology 28, no. 4 (2012): 423–26. http://dx.doi.org/10.1017/s0266467412000363.

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Low germination and seedling survival probabilities are reported in various species of epiphytic bromeliad (Benzing 1978, Hietz et al. 2011, Toledo-Aceves & Wolf 2008, Winkler et al. 2005; but see Cascante-Marín et al. 2008). If germination and seedling survival are limiting factors in the life cycle, differential germination and seedling survival between species should be reflected in the relative abundance of established plants (Cascante-Marín et al. 2006, 2008) and in their presence or absence in secondary vegetation (Hietz et al. 2011), while differential germination within the tree wo

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Griffiths, Anthony D., H. Julia Schult, and Julian Gorman. "Wild harvest of Cycas arnhemica (Cycadaceae): impact on survival, recruitment and growth in Arnhem Land, northern Australia." Australian Journal of Botany 53, no. 8 (2005): 771. http://dx.doi.org/10.1071/bt04123.

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An experimental wild harvest of Cycas arnhemica K.D. Hill, an understorey plant in tropical eucalypt savannas, was conducted in central Arnhem Land, Australia. Replicated harvest treatments were monitored over 2 years with tagged individuals. A range of a priori candidate statistical models were compared to determine the effect of wild harvest and environmental factors such as fire frequency and disturbance from feral animals on survival, recruitment and stem growth. The mean density of C. arnhemica was 1630 ha–1 and ranged from 550 to 2250 ha–1. Harvesting intensity in the 0.04-ha quadrats va

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Husheer, Sean W., and Alastair W. Robertson. "High-intensity deer culling increases growth of mountain beech seedlings in New Zealand." Wildlife Research 32, no. 4 (2005): 273. http://dx.doi.org/10.1071/wr04006.

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Browsing of mountain beech seedlings by introduced deer in the central North Island of New Zealand appears to have inhibited canopy regeneration over large areas. In 1998, a trial of high-, medium- and low-intensity deer-culling treatments was initiated in Kaimanawa and Kaweka Forest Parks to test whether mountain beech (Nothofagus solandri var. cliffortioides) forest regeneration could be restored by removing deer. Paired exclosure plots (one plot fenced to exclude deer and the other unfenced) were established within a high-intensity culling area, to monitor the benefits of recreational, comm

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Turner, Monica, Rebecca Reed, William Romme, and Gerald Tuskan. "Distribution, Morphology, Survival, and Genetics of Aspen (Populus Tremuloides) Seedlings Following the 1988 Yellowstone Fires." UW National Parks Service Research Station Annual Reports 20 (January 1, 1996): 118–22. http://dx.doi.org/10.13001/uwnpsrc.1996.3303.

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An unexpected consequence of the 1988 Yellowstone fires was the widespread establishment of seedlings of quaking aspen (Populus tremuloides) in the burned forests, including areas outside the previous range of aspen (Kay 1993; Romme et al. 1997). Although aspen is the most widely distributed tree species in North America (Powells 1965), it is relatively uncommon and localized in distribution within Yellowstone National Park (Despain 1991). Most aspen stands in Yellowstone are found in the lower elevation landscapes in the northern portion of the park, and the species was absent - prior to 1988

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Pasanen, Hannes, Virve Rehu, Kaisa Junninen, and Jari Kouki. "Prescribed burning of canopy gaps facilitates tree seedling establishment in restoration of pine-dominated boreal forests." Canadian Journal of Forest Research 45, no. 9 (2015): 1225–31. http://dx.doi.org/10.1139/cjfr-2014-0460.

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Because many currently protected forests are former timber production areas, restoration activities are often used to re-establish their natural structures. In this experimental study, we monitored the establishment of tree seedlings in previously managed but currently protected Scots pine (Pinus sylvestris L.) dominated stands in boreal forests 5 years after restoration measures. The study included eight study areas (115 sample plots) in southern Finland. We compared seedling abundance between five study groups: untreated control forest, unburned canopy gap, burned full-canopy forest, burned

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Young, Hillary S., Douglas J. McCauley, Amanda Pollock, and Rodolfo Dirzo. "Differential plant damage due to litterfall in palm-dominated forest stands in a Central Pacific atoll." Journal of Tropical Ecology 30, no. 3 (2014): 231–36. http://dx.doi.org/10.1017/s026646741400008x.

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Abstract:High densities of palms are common in many tropical forests. In some cases, the dominance of palms has been associated with a depauperate understorey and high rates of native seedling mortality. A variety of different potential mechanisms has been suggested to explain the sustained palm dominance in the understorey and canopy of these forests. Working in a Cocos nucifera-dominated wet tropical forest at Palmyra Atoll in the central Pacific, we examine how litterfall from this pantropical, and economically important palm, impacts seedling survival. We compare rates of litterfall, and r

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Pannwitt, Heike, Paula R. Westerman, Friederike De Mol, and Bärbel Gerowitt. "Demographic Processes Allow Echinochloa crus-galli to Compensate Seed Losses by Seed Predation." Agronomy 11, no. 3 (2021): 565. http://dx.doi.org/10.3390/agronomy11030565.

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The effect of weed management that targets the seed stage on subsequent life stages is largely unknown. Post-dispersal seed predation reduces the number of seeds from the soil surface before the seeds contribute to the seedbank. Density-dependent processes can mitigate the effect of seed predation in subsequent life stages. In this study, we tested if (i) targeting the seed stage affects the subsequent seedling stage; (ii) if density-dependent mortality in subsequent life stages partly compensates seedling abundance; and (iii) if the magnitude of final seed production depends on seed predation

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Maxwell, T. M. R., J. L. Moir, and G. R. Edwards. "Productivity and seedling recruitment of naturalised annual clovers versus sown clovers Trifolium repens and Trifolium subterraneum." Proceedings of the New Zealand Grassland Association 76 (January 1, 2014): 117–24. http://dx.doi.org/10.33584/jnzg.2014.76.2968.

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Abstract Naturalised annual clover (NAC) species (suckling clover, cluster clover, striated clover, and haresfoot clover) are commonly present to locally abundant in summer dry hill and high country areas where white and subterranean (sub) clover abundance is limited. This field trial investigated NAC species dry matter production and seedling regeneration compared to white and sub clover. Autumn seedling recruitment was measured in response to low (75 kg/ha) or high (200 kg/ ha) superphosphate (SP) application. Over two growing seasons, NAC species contributed >90% to pasture legume conten

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Furness, Nancy H., Mahesh K. Upadhyaya, and Douglas P. Ormrod. "Seedling growth and leaf surface morphological responses of three rangeland weeds to ultraviolet-B radiation." Weed Science 47, no. 4 (1999): 427–34. http://dx.doi.org/10.1017/s0043174500092031.

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The influence of ultraviolet-B (UV-B) radiation on seedling growth and leaf surface characteristics of important rangeland weeds Cynoglossum officinale L. (houndstongue), Centaurea diffusa Lam. (diffuse knapweed), and Tragopogon pratensis L. (meadow salsify) was investigated in a greenhouse by exposing seedlings to 0, 7, or 11 kJ m−2 d−1 of biologically effective UV-B radiation. UV-B radiation reduced leaf, stem, and root fresh weights, leaf area, and leaf: shoot ratio and increased shoot dry matter content, specific leaf weight, and leaf greenness of C. officinale seedlings. Leaf, stem, and r

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Hewitt, Rebecca E., Donald Lee Taylor, Teresa N. Hollingsworth, Christopher B. Anderson, and Guillermo Martínez Pastur. "Variable retention harvesting influences belowground plant-fungal interactions of Nothofagus pumilio seedlings in forests of southern Patagonia." PeerJ 6 (July 6, 2018): e5008. http://dx.doi.org/10.7717/peerj.5008.

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Background The post-harvest recovery and sustained productivity of Nothofagus pumilio forests in Tierra del Fuego may be affected by the abundance and composition of ectomycorrhizal fungi (EMF). Timber harvesting alters EMF community structure in many managed forests, but the impacts of harvesting can vary with the management strategy. The implementation of variable retention (VR) management can maintain, increase, or decrease the diversity of many species, but the effects of VR on EMF in the forests of southern Patagonia have not been studied, nor has the role of EMF in the regeneration proce

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Qie, Lan, Alexander D. Elsy, Ashley Stumvoll, et al. "Impending Regeneration Failure of the IUCN Vulnerable Borneo Ironwood (Eusideroxylon zwageri)." Tropical Conservation Science 12 (January 2019): 194008291882335. http://dx.doi.org/10.1177/1940082918823353.

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The regeneration of many climax species in tropical forest critically depends on adequate seed dispersal and seedling establishment. Here, we report the decreased abundance and increased spatial aggregation of younger trees of the Borneo ironwood ( Eusideroxylon zwageri) in a protected forest in Sabah Malaysia. We observed a high level of seedling herbivory with strong density dependence, likely exacerbated by local aggregation and contributing to the progressively shrinking size distribution. We also note the largely undocumented selective herbivory by sambar deer on E. zwageri seedlings. Thi

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Abebe, Getu, Atsushi Tsunekawa, Nigussie Haregeweyn, et al. "Effect of Soil Microbiome from Church Forest in the Northwest Ethiopian Highlands on the Growth of Olea europaea and Albizia gummifera Seedlings under Glasshouse Conditions." Sustainability 12, no. 12 (2020): 4976. http://dx.doi.org/10.3390/su12124976.

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Loss of beneficial microbes and lack of native inoculum have hindered reforestation efforts in the severely-degraded lands worldwide. This is a particularly pressing problem for Ethiopia owing to centuries-old unsustainable agricultural practices. This study aimed to evaluate the inoculum potential of soils from church forest in the northwest highlands of Ethiopia and its effect on seedling growth of two selected native tree species (Olea europaea and Albizia gummifera) under a glasshouse environment. Seedlings germinated in a seed chamber were transplanted into pots containing sterilized and/

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Link, Arthur F., Trey Turnblacer, Cierra K. Snyder, Sarah E. Daugherty, and Ryan M. Utz. "Low Recruitment of Native Trees in a Deciduous Forest Associated with Japanese Barberry (Berberis thunbergii) Invasion." Invasive Plant Science and Management 11, no. 1 (2018): 20–26. http://dx.doi.org/10.1017/inp.2018.1.

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AbstractInvasive plants may dramatically impact forest ecosystems by establishing dense populations and suppressing the recruitment of native tree species. One invasive shrub currently spreading throughout eastern deciduous forests of North America, Japanese barberry (Berberis thunbergii DC), may be limiting tree recruitment in stands where it invades. Once established, B. thunbergii becomes densely populated within forest understories and suppresses native plants by competing for limited resources, altering soil conditions, and changing the understory microclimate. To quantify native seedling

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Li, Naihui, Danmei Gao, Xingang Zhou, Shaocan Chen, Chunxia Li, and Fengzhi Wu. "Intercropping with Potato-Onion Enhanced the Soil Microbial Diversity of Tomato." Microorganisms 8, no. 6 (2020): 834. http://dx.doi.org/10.3390/microorganisms8060834.

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Intercropping can achieve sustainable agricultural development by increasing plant diversity. In this study, we investigated the effects of tomato monoculture and tomato/potato-onion intercropping systems on tomato seedling growth and changes of soil microbial communities in greenhouse conditions. Results showed that the intercropping with potato-onion increased tomato seedling biomass. Compared with monoculture system, the alpha diversity of soil bacterial and fungal communities, beta diversity and abundance of bacterial community were increased in the intercropping system. Nevertheless, the

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Newediuk, Levi J., and James F. Hare. "Burrowing Richardson’s ground squirrels affect plant seedling assemblages via environmental but not seed bank changes." Current Zoology 66, no. 3 (2019): 219–26. http://dx.doi.org/10.1093/cz/zoz047.

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Abstract In grassland ecosystems, burrowing mammals create disturbances, providing habitat for animal species and increasing plant community diversity. We investigated whether seedling assemblages on Richardson’s ground squirrel Urocitellus richardsonii mounds result from seed rearrangement or environmental changes that favor germination of certain species over others. To test whether ground squirrels rearrange the seed bank by burrowing, we compared seed compositions among mounds, burrows, and undisturbed soil. To test whether ground squirrels change environmental conditions, we compared soil

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Umaña, María Natalia, Jimena Forero-Montaña, Christopher J. Nytch, et al. "Dry Conditions and Disturbance Promote Liana Seedling Survival and Abundance." Bulletin of the Ecological Society of America 100, no. 1 (2019): e01502. http://dx.doi.org/10.1002/bes2.1502.

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Meléndez-Ackerman, Elvia, Carlos Calisto-Pérez, Mariety Morales-Vargas, and José Fumero-Cabán. "Post-hurricane recovery of a herbaceous understorey plant in a tropical rain forest in Puerto Rico." Journal of Tropical Ecology 19, no. 6 (2003): 677–84. http://dx.doi.org/10.1017/s0266467403006072.

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Ecologists agree on the importance of hurricanes in community dynamics in tropical forests but little is known of the responses of herbaceous species to large disturbances. The passage of Hurricane Georges over the island of Puerto Rico provided a unique opportunity to study the post-hurricane recovery of Heliconia caribaea, a large understorey herb. Five weeks after Georges, the types of vegetative damage, mortality and recovery were recorded and their relationship with plant size was established. The relationship between recovery strategy and leaf or stem damage severity was also determined.

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WANG, LIN, ZHIYING LI, RUIRUI LIU, LULU LI, and WEIWEI WANG. "Bacterial Diversity in Soybean Rhizosphere Soil at Seedling and Mature Stages." Polish Journal of Microbiology 68, no. 2 (2019): 281–84. http://dx.doi.org/10.33073/pjm-2019-023.

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Changes in the structural diversity of bacterial communities in soybean rhizospheres play important roles in plant growth and crop productivity. However, there are only a few studies on different soybean growth stages. Here, we investigated the changes in the bacterial community of soybean rhizosphere soil at two stages using Illumina high-throughput sequencing. The results showed that the bacterial abundance and diversity in the seeding stage were higher than those in the mature stage and that the diversity changed significantly. Actinobacteria, Acidobacteria, and Proteobacteria were the domi

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Turner, Monica, Rebecca Reed, William Romme, and Gerald Tuskan. "Distribution, Morphology, Survival, and Genetics of Aspen (Populus tremuloides) Seedlings Following the 1988 Yellowstone Fires." UW National Parks Service Research Station Annual Reports 21 (January 1, 1997): 135–37. http://dx.doi.org/10.13001/uwnpsrc.1997.3343.

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An unexpected consequence of the 1988 Yellowstone fires was the widespread establishment of seedlings of quaking aspen (Populus tremuloides) in the burned forests, including areas outside the previous range of aspen (Kay 1993, Romme et al.1997). Although aspen is the most widely distributed tree species in North America (Powells 1965), it is relatively uncommon and localized in distribution within Yellowstone National Park (Despain 1991). Most aspen stands in Yellowstone are found in the lower elevation landscapes in the northern portion of the park, and the species was absent -- prior to 1988

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Turner, Monica, Rebecca Reed, William Romme, and Gerald Tuskan. "Distribution, Morphology, Survival, and Genetics of Aspen (Populus tremuloides) Seedlings Following the 1988 Yellowstone Fires." UW National Parks Service Research Station Annual Reports 22 (January 1, 1998): 53–55. http://dx.doi.org/10.13001/uwnpsrc.1998.3365.

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An unexpected consequence of the 1988 Yellowstone fires was the widespread establishment of seedlings of quaking aspen (Populus tremuloides) in the burned forests, including areas outside the previous range of aspen (Kay 1993, Romme et al. 1997). Although aspen is the most widely distributed tree species in North America (Fowells 1965), it is relatively uncommon and localized in distribution within Yellowstone National Park (Despain 1991). Most aspen stands in Yellowstone are found in the lower elevation landscapes in the northern portion of the park, and the species was absent -- prior to 198

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Nichols, J. Doland, Victor K. Agyeman, Francis Balfour Agurgo, Michael R. Wagner, and Joseph R. Cobbinah. "Patterns of seedling survival in the tropical African tree Milicia excelsa." Journal of Tropical Ecology 15, no. 4 (1999): 451–61. http://dx.doi.org/10.1017/s0266467499000942.

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The spatial patterns of canopy tree and seedling life stages in the African Tropical Tree Milicia excelsa were examined to test the Janzen–Connell hypothesis (escape hypothesis). The Janzen–Connell hypothesis states that the mortality of seeds and seedlings is highest near the adult tree and declines with distance away from the adult tree of the same species. This hypothesis argues that this effect is partially responsible for maintaining the high tree species diversity of tropical forests. Solar radiation and fruit dispersal were investigated as possible explanations of observed patterns in s

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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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Robertson, Susan J., P. Michael Rutherford, Juan C. López-Gutiérrez, and Hugues B. Massicotte. "Biochar enhances seedling growth and alters root symbioses and properties of sub-boreal forest soils." Canadian Journal of Soil Science 92, no. 2 (2012): 329–40. http://dx.doi.org/10.4141/cjss2011-066.

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Robertson, S. J., Rutherford, P. M., López-Gutiérrez, J. C. and Massicotte, H. B. 2012. Biochar enhances seedling growth and alters root symbioses and properties of sub-boreal forest soils. Can. J. Soil Sci. 92: 329–340. Biochar application may enhance soil properties, improve plant productivity, and increase long-term carbon storage, but impacts of biochar on plant-microbe symbioses mediating plant nutrient uptake in temperate or boreal soils are not well known. We planted lodgepole pine (Pinus contorta var. latifolia) or sitka alder (Alnus viridis ssp. sinuata) seeds in pots containing field

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Lambers, Janneke Hille Ris, and James S. Clark. "The benefits of seed banking for red maple (Acer rubrum): maximizing seedling recruitment." Canadian Journal of Forest Research 35, no. 4 (2005): 806–13. http://dx.doi.org/10.1139/x05-017.

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Seed banking is assumed to be unimportant for temperate trees, because their seeds are short-lived in soils. However, even short-term seed banking could increase recruitment and affect population dynamics of seed-banking trees. To investigate this possibility, we examined early life-history stages of red maple (Acer rubrum L.), an abundant seed-banking tree in eastern forests. We found that seed banking benefits red maple by increasing germination when seedling survival is likely. Most red maple seeds germinate soon after spring dispersal, when seedling survival is high, or postpone germinatio

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Ramaswami, Geetha, and R. Sukumar. "Woody plant seedling distribution under invasive Lantana camara thickets in a dry-forest plot in Mudumalai, southern India." Journal of Tropical Ecology 27, no. 4 (2011): 365–73. http://dx.doi.org/10.1017/s0266467411000137.

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Abstract:Lantana camara, a shrub of Central and South American origin, has become invasive across dry forests worldwide. The effect of the thicket-forming habit of L. camara as a dispersal and recruitment barrier in a community of native woody seedlings was examined in a 50-ha permanent plot located in the seasonally dry forest of Mudumalai, southern India. Sixty 100-m2 plots were enumerated for native woody seedlings between 10–100 cm in height. Of these, 30 plots had no L. camara thickets, while the other 30 had dense thickets. The frequency of occurrence and abundance of seedlings were mode

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Queenborough, Simon A., David F. R. P. Burslem, Nancy C. Garwood, and Renato Valencia. "Taxonomic scale-dependence of habitat niche partitioning and biotic neighbourhood on survival of tropical tree seedlings." Proceedings of the Royal Society B: Biological Sciences 276, no. 1676 (2009): 4197–205. http://dx.doi.org/10.1098/rspb.2009.0921.

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In order to differentiate between mechanisms of species coexistence, we examined the relative importance of local biotic neighbourhood, abiotic habitat factors and species differences as factors influencing the survival of 2330 spatially mapped tropical tree seedlings of 15 species of Myristicaceae in two separate analyses in which individuals were identified first to species and then to genus. Using likelihood methods, we selected the most parsimonious candidate models as predictors of 3 year seedling survival in both sets of analyses. We found evidence for differential effects of abiotic nic

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