Log in

Relevant bibliographies by topics / Size differentiation of trees / Journal articles

To see the other types of publications on this topic, follow the link: Size differentiation of trees.

Journal articles on the topic 'Size differentiation of trees'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Size differentiation of trees.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

TODESCHINI, Felipe, José Julio de TOLEDO, Luis Miguel ROSALINO, and Renato Richard HILÁRIO. "Niche differentiation mechanisms among canopy frugivores and zoochoric trees in the northeastern extreme of the Amazon." Acta Amazonica 50, no. 3 (2020): 263–72. http://dx.doi.org/10.1590/1809-4392202000732.

Full text

Abstract:

ABSTRACT Frugivores and zoocoric trees represent an important proportion of tropical rainforest biodiversity. As niche differences favor species coexistence, we aimed to evaluate morphological and temporal niche segregation mechanisms among zoochoric trees and canopy frugivores in a tropical rainforest in the northeastern extreme of the Brazilian Amazon. We tested the effects of fruit morphology, tree size, frugivore body size and time of day on fruit consumption. We recorded the frugivore species that fed on 72 trees (44 species, 22 genera) and whether these frugivores swallowed the seeds. We

APA, Harvard, Vancouver, ISO, and other styles

2

Papadopoulos, Nikolaos, Parra R. Gonzalo, and Johannes Söding. "PROSSTT: probabilistic simulation of single-cell RNA-seq data for complex differentiation processes." Bioinformatics 35, no. 18 (2019): 3517–19. http://dx.doi.org/10.1093/bioinformatics/btz078.

Full text

Abstract:

Abstract Summary Cellular lineage trees can be derived from single-cell RNA sequencing snapshots of differentiating cells. Currently, only datasets with simple topologies are available. To test and further develop tools for lineage tree reconstruction, we need test datasets with known complex topologies. PROSSTT can simulate scRNA-seq datasets for differentiation processes with lineage trees of any desired complexity, noise level, noise model and size. PROSSTT also provides scripts to quantify the quality of predicted lineage trees. Availability and implementation https://github.com/soedinglab

APA, Harvard, Vancouver, ISO, and other styles

3

Szmyt, Janusz, and Robert Korzeniewicz. "Spatial diversity of planted and untended silver birch (Betula pendula L.) stands." Forest Research Papers 73 (4) (December 1, 2012): 323–30. https://doi.org/10.2478/v10111-012-0031-3.

Full text

Abstract:

The aim of this paper was to describe changes in the spatial distribution of living trees in planted and untended birch stands, as well as to determine the spatial differentiation of the diameters and height of their constituent trees. Analysis was performed in 9- and 39-year old stands. The structural diversity of birch stands was described using the following spatial indices: Clark-Evans index (<em>CE</em>), spatial differentiation index for DBH (<em>TD</em>) and height (<em>TH</em>). The <em>CE</em> index describes the horizontal distribution of trees within a stand and the <em>TD</em>/<em>

APA, Harvard, Vancouver, ISO, and other styles

4

Maze, Jack, R. K. Scagel, and L. R. Bohm. "Patterns of within-tree variation in a population of Pinus ponderosa." Canadian Journal of Botany 64, no. 8 (1986): 1733–38. http://dx.doi.org/10.1139/b86-232.

Full text

Abstract:

The amount and structure of within-individual variation in different aged and sized individuals in a population of Pinus ponderosa were compared using multivariate analytical techniques. We wished to determine if the increase in variation and progressive between-plant differentiation that occur with ontogeny of part of a plant are also manifested by entire plants as they age or increase in size. We detected some evidence of increasing differentiation with age or size. The impact on multivariate descriptors of within-tree variation, age and size of trees, microsite differences where the trees g

APA, Harvard, Vancouver, ISO, and other styles

5

Watanabe, Shuntaro, Yuko Kaneko, Yuri Maesako, and Naohiko Noma. "Detecting the Early Genetic Effects of Habitat Degradation in Small Size Remnant Populations of Machilus thunbergii Sieb. et Zucc. (Lauraceae)." International Journal of Forestry Research 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/9410626.

Full text

Abstract:

Habitat degradation caused by human activities has reduced the sizes of many plant populations worldwide, generally with negative genetic impacts. However, detecting such impacts in tree species is not easy because trees have long life spans. Machilus thunbergii Sieb. et Zucc. (Lauraceae) is a dominant tree species of broad-leaved evergreen forests distributed primarily along the Japanese coast. Inland habitats for this species have become degraded by human activities. To investigate the effects of habitat degradation on genetic structure, we compared the genetic diversities of mature and juve

APA, Harvard, Vancouver, ISO, and other styles

6

Howie, H., and J. Lloyd. "Response of orchard 'Washington Navel' orange, Citrus sinensis (L.) Osbeck, to saline irrigation water. II. Flowering, fruit set and fruit growth." Australian Journal of Agricultural Research 40, no. 2 (1989): 371. http://dx.doi.org/10.1071/ar9890371.

Full text

Abstract:

Flowering, fruit set and fruit growth of 'Washington Navel' orange fruit was monitored on 24-year-old Citrus sinensis trees on Sweet orange rootstocks that had been irrigated with either 5 or 20 mol m-3 NaCl for 5 years preceding measurements.Trees irrigated with high salinity water had reduced flowering intensities and lower rates of fruit set. This resulted in final fruit numbers for trees irrigated with 20 mol m-3 being 38% those of trees irrigated with 5 mol m-3 NaCl. Final fruit numbers were quantitatively related to canopy leaf area for both salinity treatments.Despite little difference

APA, Harvard, Vancouver, ISO, and other styles

7

Bobinac, Martin. "Biological differentiation of trees in beech stands and its significance for tending operations." Bulletin of the Faculty of Forestry, no. 88 (2003): 27–40. http://dx.doi.org/10.2298/gsf0388027b.

Full text

Abstract:

The characteristics of biological differentiation of trees are analyzed in medium-aged beech stands in similar site conditions and their effect on tending operations. The stands are similar by origin and by age of dominant trees, but they differ significantly by the characteristics of growth elements. The regularity of biological differentiation of trees in stands is the base of the selection adapted to natural processes, such as selection thinning. The primary objective of tending to achieve optimal and stable production should be defined only for the dominant trees whose number in the study

APA, Harvard, Vancouver, ISO, and other styles

8

Stanzani Maserati, Michelangelo, Corrado Matacena, Luisa Sambati, et al. "The Tree-Drawing Test (Koch’s Baum Test): A Useful Aid to Diagnose Cognitive Impairment." Behavioural Neurology 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/534681.

Full text

Abstract:

Objective. To study the Tree-Drawing Test in a group of demented patients and compare it with a group of mild cognitively impaired patients (MCI) and controls.Methods. Consecutive outpatients were classified as affected by dementia (Alzheimer’s disease (AD), frontotemporal dementia (FTD), and vascular dementia (VD)) or by MCI. Patients and controls underwent the Tree-Drawing Test and MMSE.Results. 118 AD, 19 FTD, 46 VD, and 132 MCI patients and 90 controls were enrolled. AD patients draw trees globally smaller than other patients and controls. FTD patients draw trees with a wider space occupat

APA, Harvard, Vancouver, ISO, and other styles

9

Nicolini, Eric, Daniel Barthélémy, and Patrick Heuret. "Influence de la densité du couvert forestier sur le développement architectural de jeunes chênes sessiles, Quercus petraea (Matt.) Liebl. (Fagaceae), en régénération forestière." Canadian Journal of Botany 78, no. 12 (2000): 1531–44. http://dx.doi.org/10.1139/b00-125.

Full text

Abstract:

The growth and branching patterns of the main axis of 6-year-old sessile oak, growing in a natural regeneration in the north of France, were analysed each year retrospectively according to three increasing canopy density conditions: large gap, small gap, and dense canopy. Increasing gap size is associated with an increase in the total height, basal diameter, branching probability, and global polycyclism rate of the trees. At the growth unit or annual shoot level, from dense canopy to large gaps these botanical entities also show an increase in their total length, number of nodes, polycyclism,

APA, Harvard, Vancouver, ISO, and other styles

10

McFadden, George, and Chadwick D. Oliver. "Three-Dimensional Forest Growth Model Relating Tree Size, Tree Number, and Stand Age: Relation to Previous Growth Models and to Self-Thinning." Forest Science 34, no. 3 (1988): 662–76. http://dx.doi.org/10.1093/forestscience/34.3.662.

Full text

Abstract:

Abstract A generalized three-dimensional model for tree growth containing tree size, number of trees per area, and stand age on the three axes can be shown to incorporate three previous models in the theoretical absence of differentiation and self-thinning. The previous models, each incorporating two of the three axes, are: the sigmoid growth models of tree size/stand age; the relation of tree size (volume or diameter)/tree number; and the reverse-J-shaped mortality relation of maximum tree number/stand age. Information developed from one two-dimensional model can be transferred to the other m

APA, Harvard, Vancouver, ISO, and other styles

11

Si, Yuhui, Dehuai Meng, Han Zhong, Ziwei Zhu, Hongfei Zou, and Ke Rong. "Foraging Niche Differentiation of Five Woodpecker Species in the Primitive Broadleaved Korean Pine Forests of Northeast China." Forests 14, no. 11 (2023): 2166. http://dx.doi.org/10.3390/f14112166.

Full text

Abstract:

Explaining the mechanism of the coexistence of sympatric species is an important goal of ecology. Five species of woodpeckers coexist in the broadleaved Korean pine forest of Liangshui National Nature Reserve, including the Black Woodpecker (Dryocopus martius), Great Spotted Woodpecker (Dendrocopos major), Lesser Spotted Woodpecker (Dendrocopos minor), Three-toed Woodpecker (Picoides tridactylus), and White-backed Woodpecker (Dendrocopos leucotos). Woodpeckers are considered to be keystone species because of their role as ecosystem engineers, creating breeding and shelter sites for many verteb

APA, Harvard, Vancouver, ISO, and other styles

12

Bartolini, Susanna, Ermes Lo Piccolo, and Damiano Remorini. "Different Summer and Autumn Water Deficit Affect the Floral Differentiation and Flower Bud Growth in Apricot (Prunus armeniaca L.)." Agronomy 10, no. 6 (2020): 914. http://dx.doi.org/10.3390/agronomy10060914.

Full text

Abstract:

In deciduous fruit species, floral bud initiation, differentiation and organogenesis take place during the summer–autumn season that precedes anthesis. Among factors able to modify the regularity of these processes, water availability represents a crucial aspect. This investigation aimed to assess the influence of different summer and autumn water deficit and re-watering treatments on floral morphogenesis, xylem vessel differentiation and quality of flower buds. Trials were carried out on two-year-old potted apricot trees (cv. ‘Portici’) which were submitted to different regimes: (i) fully irr

APA, Harvard, Vancouver, ISO, and other styles

13

Blanco, Victor, Pedro José Blaya-Ros, Roque Torres-Sánchez, and Rafael Domingo. "Influence of Regulated Deficit Irrigation and Environmental Conditions on Reproductive Response of Sweet Cherry Trees." Plants 9, no. 1 (2020): 94. http://dx.doi.org/10.3390/plants9010094.

Full text

Abstract:

The reproductive response of fifteen year old sweet cherry trees (Prunus avium L.) combination ‘Prime Giant’/SL64 under Mediterranean climate to deficit irrigation was studied in a commercial orchard in south-eastern Spain for four seasons. Three irrigation treatments were assayed: (i) control treatment, irrigated without restrictions at 110% of seasonal crop evapotranspiration; (ii) sustained deficit irrigation treatment, irrigated at 85% ETc during pre-harvest and post-harvest periods, and at 100% ETc during floral differentiation, and (iii) regulated deficit irrigation treatment, irrigated

APA, Harvard, Vancouver, ISO, and other styles

14

Žabota, Barbara, and Milan Kobal. "The Use of UAV-Acquired Multiband Images for Detecting Rockfall-Induced Injuries at Tree Crown Level." Forests 13, no. 7 (2022): 1039. http://dx.doi.org/10.3390/f13071039.

Full text

Abstract:

In this paper, we present an identification of rockfall-injured trees based on multiband images obtained by an unmanned aerial vehicle (UAV). A survey with a multispectral camera was performed on three rockfall sites with versatile tree species (Fagus sylvatica L., Larix decidua Mill., Pinus sylvestris L., Picea abies (L.) Karsten, and Abies alba Mill.) and with different characterizations of rockfalls and rockfall-induced injuries. At one site, rockfall injuries were induced in the same year as the survey. At the second site, they were induced one year after the initial injuries, and at the t

APA, Harvard, Vancouver, ISO, and other styles

15

НАГИМОВ, З. Я., and И. А. ЗДОРНОВ. "DIFFERENTIATION OF TREES IN ROADSIDE PROTECTIVE FOREST STRIPS OF NORTHERN KAZAKHSTAN." Леса России и хозяйство в них, no. 3(74) (January 2, 2021): 20–26. http://dx.doi.org/10.51318/fret.2021.74.3.003.

Full text

Abstract:

Объектом исследований явились искусственно созданные придорожные защитные лесные полосы раз- личных конструкций, разного возраста и породного состава. Экспериментальным материалом послужили данные перечислительной таксации на 24 пробных площадях. В ходе проведенных исследований установлено, что придорожные защитные лесные полосы разных пород заметно отличаются по степени дифференциации деревьев по диаметру и высоте. В порядке умень- шения коэффициента вариации размеров стволов их можно расположить в следующий ряд: вязовые, клё- новые, берёзовые, сосновые и тополевые. Дифференциация деревьев ка

APA, Harvard, Vancouver, ISO, and other styles

16

Szmyt, Janusz, and Robert Korzeniewicz. "Do natural processes at the juvenile stage of stand development differentiate the spatial structure of trees in artificially established forest stands?" Forest Research Papers 75, no. 2 (2014): 171–79. http://dx.doi.org/10.2478/frp-2014-0016.

Full text

Abstract:

Abstract Structural diversity is one of the most interesting phenomena that have been studied by forest ecologists and practitioners. Amongst the different characteristics of forest structure, spatial diversity of trees and their attributes seem to be very important The more spatially structured a population is, the higher its diversity in terms of size and species richness. Because most forests in Europe are managed and were artificially established, they are subjected to conversion processes turning them into more complex systems. The approach presented here aims at elucidating whether natur

APA, Harvard, Vancouver, ISO, and other styles

17

Szmyt, Janusz, and Robert Korzeniewicz. "Do natural processes at the juvenile stage of stand development differentiate the spatial structure of trees in artificially established forest stands?" Forest Resaerch Papers 75 (2) (June 1, 2014): 171–79. https://doi.org/10.2478/frp-2014-0016.

Full text

Abstract:

Structural diversity is one of the most interesting phenomena that have been studied by forest ecologists and practitioners. Amongst the different characteristics of forest structure, spatial diversity of trees and their attributes seem to be very important The more spatially structured a population is, the higher its diversity in terms of size and species richness. Because most forests in Europe are managed and were artificially established, they are subjected to conversion processes turning them into more complex systems. The approach presented here aims at elucidating whether natural proces

APA, Harvard, Vancouver, ISO, and other styles

18

Larocque, Guy R. "Functional growth analysis of red pine trees under variable intensities of competition." Forestry Chronicle 74, no. 5 (1998): 728–35. http://dx.doi.org/10.5558/tfc74728-5.

Full text

Abstract:

A functional approach is proposed for comparing the development of individual red pine (Pinus resinosa Ait.) trees which had been growing under different intensities of competition from ages 13 to 43. Growth rate measures, based on absolute growth rate, relative growth rate and the ratio of absolute growth rate to crown width, were obtained from the differentiation of a cumulative growth function. Individual tree data were obtained from stands of the same age, but with different initial spacings: 1.5 × 1.5 m, 2.4 × 2.4 m, and 4.3 × 4.3 m. The Chapman-Richards function represented adequately th

APA, Harvard, Vancouver, ISO, and other styles

19

COSMULESCU, Sina N., Mariana BÎRSANU IONESCU, and Constantin NETOIU. "Impact of Climatic Factors on Radial Growth in Walnut (Juglans regia L.)." Notulae Scientia Biologicae 11, no. 2 (2019): 304–8. http://dx.doi.org/10.15835/nsb11210492.

Full text

Abstract:

Walnut is a species of high vigour, with relatively slow growth, and the size of trees grows with each year of growth. Accumulation of wood biomass, and respectively, productivity, is a resultant synthesis of physiological processes and interaction of trees with environmental factors. The authors have assessed growth characteristics of genotypes standing on their own roots in the sands area of Oltenia (Romania). In terms of tree height, it ranged from 8.53 m to 18.00 m, while trunk circumference varied between 40 cm and 229 cm, in genotypes with ages between the 16 and 44 years. Environmental

APA, Harvard, Vancouver, ISO, and other styles

20

Passo, A., J. G. Puntieri, and D. Barthélémy. "Trunk and main-branch development in Nothofagus pumilio (Nothofagaceae): a retrospective analysis of tree growth." Canadian Journal of Botany 80, no. 7 (2002): 763–72. http://dx.doi.org/10.1139/b02-059.

Full text

Abstract:

The development of the trunk and main branches of approximately 26-year-old Nothofagus pumilio (Poepp. et Endl.) Krasser trees was studied. The length and number of leaves of annual shoots were recorded for 56 trees from a natural population. Morphological and macroanatomical features allowed the identification of shoot apex deaths and the axillary positions from which branches and relay shoots derived. The trees had a mean height of approximately 6 m and a mean basal diameter of approximately 8 cm. The length of trunk shoots increased from the first years to the intermediate years of tree gro

APA, Harvard, Vancouver, ISO, and other styles

21

Walter, Scott T., and Chris C. Maguire. "Conifer response to three silvicultural treatments in the Oregon Coast Range foothills." Canadian Journal of Forest Research 34, no. 9 (2004): 1967–78. http://dx.doi.org/10.1139/x04-068.

Full text

Abstract:

This study assessed growth, condition, and mortality of residual trees one decade after harvest across three silvicultural treatments in thirty 85- to 125-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in the Oregon Coast Range foothills. Group-selection cuts had 33% of the entire stand volume extracted as patches approximately 0.20.8 ha in size; two-story regeneration harvests had 75% of the volume extracted, and 2030 residual trees/ha were left; clearcuts had all trees removed, except for 1.2 trees/ha. One decade after harvest, tree basal area, diameter, and height grow

APA, Harvard, Vancouver, ISO, and other styles

22

GAUSLAA, Yngvar, Marit LIE, and Mikael OHLSON. "Epiphytic lichen biomass in a boreal Norway spruce forest." Lichenologist 40, no. 3 (2008): 257–66. http://dx.doi.org/10.1017/s0024282908007664.

Full text

Abstract:

Abstract:Alectorioid and foliose lichens were weighed from full-size branches of Picea abies cut at two canopy heights in 100 trees in an old subalpine forested area in eastern Norway. The mean lichen biomass per branch decreased from 46 to 37 g moving upwards from 2–3 to 5–6 m canopy height. The lichen biomass correlated strongly with branch size variables, branch diameter alone explaining 48 of the variation in lichen biomass per branch (n=200). The alectorioid/foliose biomass ratio increased from 0·149 at 2–3 m to 0·316 at 5–6 m. Site factors reflecting openness of the canopy were computed

APA, Harvard, Vancouver, ISO, and other styles

23

Buttò, Valentina, Sergio Rossi, Annie Deslauriers, and Hubert Morin. "Is size an issue of time? Relationship between the duration of xylem development and cell traits." Annals of Botany 123, no. 7 (2019): 1257–65. http://dx.doi.org/10.1093/aob/mcz032.

Full text

Abstract:

Abstract Background and Aims Secondary growth is a process related to the formation of new cells that increase in size and wall thickness during xylogenesis. Temporal dynamics of wood formation influence cell traits, in turn affecting cell patterns across the tree ring. We verified the hypothesis that cell diameter and cell wall thickness are positively correlated with the duration of their differentiation phases. Methods Histological sections were produced by microcores to assess the periods of cell differentiation in black spruce [Picea mariana (Mill.) B.S.P.]. Samples were collected weekly

APA, Harvard, Vancouver, ISO, and other styles

24

Ranius, T., and P. Douwes. "Genetic structure of two pseudoscorpion species living in tree hollows in Sweden." Animal Biodiversity and Conservation 25, no. 2 (2002): 67–74. https://doi.org/10.32800/abc.2002.25.2067.

Full text

Abstract:

Two saproxylic pseudoscorpions, Larca lata and Allochernes wideri, were compared in an analysis of genetic structure in southern Sweden. Allochernes wideri is a relatively widely distributed species that occurs in single-standing trees and in small tree hollows, while L. lata is on the Swedish red list and confined to larger assemblages of very old trees with hollows containing large amounts of wood mould. In A. wideri, the polymorphism of PGM was used, whereas in L. lata the variation for PGI was studied. The genetic differentiation between trees within a site was low for both species, indica

APA, Harvard, Vancouver, ISO, and other styles

25

Pamić, Ehlimana, Aida Ibrahimspahić, Velid Halilović, Admir Avdagić, and Azer Jamaković. "Spatial structure – case study on experimental plots of beech (Fagus sylvatica L.) and scots pine (Pinus sylvestrisL.) in Olovo, Bosnia and Herzegovina." Radovi Šumarskog fakulteta Univerziteta u Sarajevu 51, no. 1 (2021): 25–34. http://dx.doi.org/10.54652/rsf.2021.v51.i1.351.

Full text

Abstract:

Spatial structure is the horizontal and vertical arrangement of individual trees. It affects many processes in the stand such as stability, production and regeneration. Stand structure parameters are used to describe spatial structure on experimental plots. The paper presents methods that describe the stand structure through three levels of diversity related to position, species and size. Research has been conducted on two experimental plots from the area of Olovo. Referent trees and their competitors were selected on both experimental plots, and competitors were defined by referent tree dista

APA, Harvard, Vancouver, ISO, and other styles

26

Getzin, Stephan, Martin Worbes, Thorsten Wiegand, and Kerstin Wiegand. "Size dominance regulates tree spacing more than competition within height classes in tropical Cameroon." Journal of Tropical Ecology 27, no. 1 (2010): 93–102. http://dx.doi.org/10.1017/s0266467410000453.

Full text

Abstract:

Abstract:Does competition prevail in large size classes of trees in tropical forests? This question is fundamental to our understanding of the demography and dynamics occurring in rain forests. We investigated this question based on an undisturbed late-secondary forest on a 1-ha plot in central Cameroon. Trees were stem-mapped and classified into three size classes: understorey, midstorey and overstorey. The diameter at breast height and yearly biomass increment were determined as measures of plant growth and performance. Spatial statistics such as pair- and mark-correlation functions were use

APA, Harvard, Vancouver, ISO, and other styles

27

Abdelkader, Fahima, Ziane Laiadi, Susana Boso, José-Luis Santiago, Pilar Gago, and María-Carmen Martínez. "Algerian Fig Trees: Botanical and Morphometric Leaf Characterization." Horticulturae 9, no. 5 (2023): 612. http://dx.doi.org/10.3390/horticulturae9050612.

Full text

Abstract:

Leaf morphology in plants is very important in the evaluation of intraspecific variation. Indeed, the leaves of the fig tree (Ficus carica L.) present a great diversity of shape and size. The present study consists of the botanical, morphological, and morphometric characterization of the leaves of 26 local fig tree varieties cultivated in different areas of Bejaia (northeast Algeria). Our results indicate that the morphological parameters of the leaves allowed a good differentiation of the studied cultivars according to the descriptors (UPOV) among varieties and independent of their growing en

APA, Harvard, Vancouver, ISO, and other styles

28

Wang, Zichun, Yaoxiang Li, Yongbin Meng, Chunxu Li, and Zheyu Zhang. "Thinning Effects on Stand Structure and Carbon Content of Secondary Forests." Forests 13, no. 4 (2022): 512. http://dx.doi.org/10.3390/f13040512.

Full text

Abstract:

In, this study, we analysed the effects of thinning on stand structure and carbon stocks for a mixed conifer and broadleaf natural secondary forests in the Small Khingan Mountains, China. Stand structure and carbon stocks were assessed in trees from unthinned control (CK), lightly thinned (LT), moderately thinned (MT) and heavily thinned (HT) treatments. Results showed that the heavier the thinning, the larger the crown area became. Under the MT treatment, trees tended to be evenly distributed when compared to trees under the other treatments. All the trees of the LT and HT treatments were mix

APA, Harvard, Vancouver, ISO, and other styles

29

Johnson*, Holly A., Steven A. Weinbaum, and Theodore M. DeJong. "Crop Load Effects on Subsequent Peach Floral Development, Pistil Size at Anthesis and Fruit Size at Maturity." HortScience 39, no. 4 (2004): 851C—851. http://dx.doi.org/10.21273/hortsci.39.4.851c.

Full text

Abstract:

The effects of low and high crop loads in 2002 on floral development (Summer 2002), pistil size at anthesis (Spring 2003), and subsequent season fruit size at maturity (Summer 2003) were studied. Trees were all thinned to the same crop load in 2003. Three peach cultivars (Elegant Lady, O'Henry and Fairtime) with different ripening times (mid-July, mid-August, and early-September, respectively) were used to assess the effects of current season crop on floral development for the subsequent season. Based on previous literature, we reasoned that the maximum competition for carbohydrates between ma

APA, Harvard, Vancouver, ISO, and other styles

30

Szmyt, Janusz, and Mariusz Zabielski. "Spatial differentiation of trees of different size classes in pine (Pinus sylvestris L.) stands with different initial densities." Forest Research Papers 71, no. 3 (2010): 267–77. http://dx.doi.org/10.2478/v10111-010-0023-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Sandak, Jakub, Anna Sandak, Claudio Cantini, and Antonella Autino. "Differences in wood properties of Picea abies L. Karst. in relation to site of provenance and population genetics." Holzforschung 69, no. 4 (2015): 385–97. http://dx.doi.org/10.1515/hf-2014-0061.

Full text

Abstract:

Abstract Chemical and physical characteristics of wood from six European populations of Picea abies were investigated taking into consideration their genetic differentiation determined by four microsatellites markers. The growth conditions of investigated spruce trees differed significantly. As a consequence, several adaptations were observed in samples from varying environments. The adaptation mechanisms include a variation to the annual rings morphology as well as the physical properties of the wood. It was proved that some properties, such as wood density or latewood ratio, are strictly cor

APA, Harvard, Vancouver, ISO, and other styles

32

Fajstavr, Marek, Kyriaki Giagli, Hanuš Vavrčík, Vladimír Gryc, Petr Horáček, and Josef Urban. "The cambial response of Scots pine trees to girdling and water stress." IAWA Journal 41, no. 2 (2020): 159–85. http://dx.doi.org/10.1163/22941932-bja10004.

Full text

Abstract:

Abstract We monitored six healthy dominant trees and six girdled Scots pine trees for two successive growing seasons (2014 and 2015) to investigate the seasonal dynamics, cambial activity, and morphology of the new xylem and phloem cells formed under environmental stress when girdling was applied during the dormant period (15 January 2014). Microcore (1.8 mm) samples were collected weekly using a Trephor tool above and below the girdling area, and weather data were measured on site. Drought stress in combination with girdling reduced the total number of differentiation days cell formation. In

APA, Harvard, Vancouver, ISO, and other styles

33

Alavi, Seyed Jalil, Razieh Veiskarami, Omid Esmailzadeh, and Klaus v. Gadow. "Analyzing the Biological and Structural Diversity of Hyrcanian Forests Dominated by Taxus baccata L." Forests 11, no. 6 (2020): 701. http://dx.doi.org/10.3390/f11060701.

Full text

Abstract:

The Hyrcanian Forests, well-known for its World Heritage site in the South Caspian region of Northern Iran, are refugia for a special tree flora. Some areas in particular feature a concentration of large and numerous trees of Taxus baccata, a species that has attracted the interest of many researchers given its medicinal importance. The objective of this study was to analyze the biological and structural features of these unique ecosystems based on three large tree-mapped field plots using new methods. We developed a species abundance distribution and three species–area relations, and analyzed

APA, Harvard, Vancouver, ISO, and other styles

34

Tanioka, Yosuke, Hideyuki Ida, and Mitsuru Hirota. "Relationship between Canopy Structure and Community Structure of the Understory Trees in a Beech Forest in Japan." Forests 13, no. 4 (2022): 494. http://dx.doi.org/10.3390/f13040494.

Full text

Abstract:

Understory trees occupy a spatially heterogeneous light environment owing to light interception by patchily distributed canopy leaves. We examined the spatial distribution of canopy leaves and the spatial structure of the understory tree community (height < 5 m) and their relationships in a beech forest in Nagano, Japan. We measured the canopy leaf area index (LAI) at 10 m intervals (n = 81) in a permanent research plot (1 ha). We established a circular subplot centered on each LAI measurement point, and determined the species composition and the aboveground net primary production of wood (

APA, Harvard, Vancouver, ISO, and other styles

35

Goldschmidt, Eliezer E. "Carbohydrate Supply as a Limiting Factor for Citrus Fruit Growth and Productivity." HortScience 32, no. 3 (1997): 550E—551. http://dx.doi.org/10.21273/hortsci.32.3.550e.

Full text

Abstract:

Carbohydrates fulfill several roles in plants; as building stones, as a source of energy, and also, as recently demonstrated, as modulators of gene expression. Primary, photosynthetic production of carbohydrates (as well as their release from tree reserves) is linked with the carbohydrate-consuming processes through complex feedback and feedforward regulatory loops. With horticultural productivity as the goal, maximum resources must be diverted toward reproductive processes. Persistence of viable vegetative structures must be secured, however, to enable the function of tree systems and ensure

APA, Harvard, Vancouver, ISO, and other styles

36

Strimbu, Bogdan M., Andrei Paun, Alexandru Amarioarei, Mihaela Paun, and Victor F. Strimbu. "Efficient synthetic generation of ecological data with preset spatial association of individuals." Canadian Journal of Forest Research 51, no. 8 (2021): 1148–65. http://dx.doi.org/10.1139/cjfr-2020-0490.

Full text

Abstract:

Many experiments cannot feasibly be conducted as factorials. Simulations using synthetically generated data are viable alternatives to such factorial experiments. The main objective of the present research is to develop a methodology and platform to synthetically generate spatially explicit forest ecosystems represented by points with a predefined spatial pattern. Using algorithms with polynomial complexity and parameters that control the number of clusters, the degree of clusterization, and the proportion of nonrandom trees, we show that spatially explicit forest ecosystems can be generated t

APA, Harvard, Vancouver, ISO, and other styles

37

Zhao, Zhonghua, Gangying Hui, Wenzhen Liu, Yanbo Hu, and Gongqiao Zhang. "A Novel Method for Calculating Stand Structural Diversity Based on the Relationship of Adjacent Trees." Forests 13, no. 2 (2022): 343. http://dx.doi.org/10.3390/f13020343.

Full text

Abstract:

Understanding the diversity and complexity of stand structure is important for managing the biodiversity of forest ecosystem, and stand structural diversity is essential for evaluating forest management activities. Based on the relationship of adjacent trees, a quantitative method of stand structure diversity is proposed to express the heterogeneity of stand structure in tree species, distribution pattern, species separation and size differentiation. In this study, we defined the diversity of structural unit types and derived a new index of forest structural diversity (SD′) employing the addit

APA, Harvard, Vancouver, ISO, and other styles

38

Çiftçi, Asiye, Burak Yelmen, Funda Ö. Değirmenci, and Zeki Kaya. "Impact of biased sex ratio on the genetic diversity, structure, and differentiation of Populus nigra (European black poplar)." Botany 98, no. 10 (2020): 603–13. http://dx.doi.org/10.1139/cjb-2020-0046.

Full text

Abstract:

Effective population size is a crucial concept of conservation biology. It is reduced by biased sex ratio, consequently causing loss of genetic variation. To evaluate genetic diversity related to gender, and investigate the possible effects of biased sex ratio, we analyzed available microsatellite DNA markers from 120 samples of Populus nigra L. (European black poplar) originating from five geographical regions in Turkey. Using 12 microsatellite markers, we detected 60 clones of the same genotype, out of 120 trees. The clone genotype was observed both in males and females, which might suggest

APA, Harvard, Vancouver, ISO, and other styles

39

Dejean, Alain, Sébastien Durou, Ingrid Olmsted, Roy R. Snelling, and Jérôme Orivel. "Nest site selection by ants in a flooded Mexican mangrove, with special reference to the epiphytic orchid Myrmecophila christinae." Journal of Tropical Ecology 19, no. 3 (2003): 325–31. http://dx.doi.org/10.1017/s0266467403003353.

Full text

Abstract:

The distribution of the arboreal ant community plus a termite species of the genus Nasutitermes was inventoried on 938 red mangrove, Rhizophora mangle L., trees in a completely flooded mangrove forest of the Sian Ka'an Biosphere Reserve, Quintana Roo, Mexico. Colonies sheltered in dry hollow branches of the trees and the pseudobulbs of the epiphytic orchid, Myrmecophila christinae. Two size classes of dry hollow tree branches were categorized in order to test differences in ant distribution. As some trees remained unoccupied by either an ant or a termite colony, we deduced that the competition

APA, Harvard, Vancouver, ISO, and other styles

40

Méndez-Cea, Belén, Isabel García-García, Raúl Sánchez-Salguero, Víctor Lechuga, Francisco Javier Gallego, and Juan C. Linares. "Tree-Level Growth Patterns and Genetic Associations Depict Drought Legacies in the Relict Forests of Abies marocana." Plants 12, no. 4 (2023): 873. http://dx.doi.org/10.3390/plants12040873.

Full text

Abstract:

The frequency and intensity of drought events are increasing worldwide, challenging the adaptive capacity of several tree species. Here, we evaluate tree growth patterns and climate sensitivity to precipitation, temperature, and drought in the relict Moroccan fir Abies marocana. We selected two study sites, formerly stated as harboring contrasting A. marocana taxa (A. marocana and A. tazaotana, respectively). For each tree, dendrochronological methods were applied to quantify growth patterns and climate–growth sensitivity. Further, ddRAD-seq was performed on the same trees and close saplings t

APA, Harvard, Vancouver, ISO, and other styles

41

Owens, J. N., J. E. Webber, S. D. Ross, and R. P. Pharis. "Interaction between gibberellin A4/7 and root-pruning on the reproductive and vegetative processes in Douglas-fir. IV. Effects on lateral bud development." Canadian Journal of Forest Research 16, no. 2 (1986): 211–21. http://dx.doi.org/10.1139/x86-038.

Full text

Abstract:

The anatomy, mitotic frequency, size, and total insoluble carbohydrate histochemistry was studied in axillary apices from 9- and 10-year-old Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) trees after cone induction treatments of root-pruning and (or) stem injections of a gibberellin A4 and A7 (GA4/7) mixture. Axillary buds were initiated at the time of root-pruning, but root-pruning treatment had no effect on axillary bud initiation. Axillary apices from control and gibberellin-treated trees were similar and followed the normal sequence of bud-scale initiation, differentiation, and leaf ini

APA, Harvard, Vancouver, ISO, and other styles

42

Bountis, Diamantis, and Elias Milios. "DOES CROWN CLASS CLASSIFICATION IMPROVE THE INITIATION AND DEVELOPMENT ANALYSIS OF POST-FIRE PINUS BRUTIA STANDS?" CERNE 23, no. 1 (2017): 61–68. http://dx.doi.org/10.1590/01047760201723012260.

Full text

Abstract:

ABSTRACT The present study was conducted in Pinus brutia Ten. stands which were created after the forest fire of 1989, in the island of Thassos. In 2008, 45 plots of 5 x 5 m were randomly established in three site types. In each plot, the trees were counted, while the breast height diameter of trees was measured. All trees were classified as dominant, codominant, intermediate or suppressed. In each plot, one tree from each crown class was selected (a total of 160 trees) and were cut down. From each tree a cross-sectional disc was cut from the ground level and the number of annual growth rings

APA, Harvard, Vancouver, ISO, and other styles

43

Smith, Denise R., Themis J. Michailides, and Glen R. Stanosz. "Differentiation of a Fusicoccum sp. Causing Panicle and Shoot Blight on California Pistachio Trees from Botryosphaeria dothidea." Plant Disease 85, no. 12 (2001): 1235–40. http://dx.doi.org/10.1094/pdis.2001.85.12.1235.

Full text

Abstract:

A panicle and shoot blight disease of pistachio trees in California is caused by a fungus previously identified as the anamorph of Botryosphaeria dothidea. We have compared random amplified polymorphic DNA (RAPD) markers, nuclear rDNA internal transcribed spacer (ITS) region sequences, and conidium morphology of 15 isolates of the pistachio Fusicoccum to those of well-characterized isolates of B. dothidea, B. ribis, and F. luteum. Cluster analysis of RAPD markers separated the pistachio Fusicoccum isolates from B. dothidea, as did parsimony analysis of the ITS region sequences. Conidium size a

APA, Harvard, Vancouver, ISO, and other styles

44

Southwick, Stephen M., and James T. Yeager. "UTILIZATION OF POSTHARVEST GIBBERELLIC ACID SPRAYS TO REDUCE HAND THINNING IN `PATTERSON' APRICOT." HortScience 25, no. 9 (1990): 1167a—1167. http://dx.doi.org/10.21273/hortsci.25.9.1167a.

Full text

Abstract:

Heavy fruit set of apricot (Prunus armeniaca) cultivars grown in California often require hand thinning to insure that adequate fruit size is obtained. Alternatives to costly hand thinning would be welcome. GA treatments made during flower bud initiation/differentiation have been previously shown to inhibit the development of floral and vegetative buds in a number of different tree fruit species. The effects of post-harvest limb and whole tree aqueous gibberellic acid (GA) sprays on flower and fruit production were investigated over a 3 year period in `Patterson' apricot. Limb treatments indic

APA, Harvard, Vancouver, ISO, and other styles

45

Owens, John N., and Sheila J. Simpson. "Bud and shoot development in Piceaengelmannii in response to cone induction treatments." Canadian Journal of Forest Research 18, no. 2 (1988): 231–41. http://dx.doi.org/10.1139/x88-034.

Full text

Abstract:

Apical size, mitotic index and developmental anatomy, and lateral shoot mitotic index and cell elongation were assessed in potted ramets of Piceaengelmannii (Parry) under seven cone-induction treatments using various combinations of drought, heat, and gibberellin A4/7. In control trees lateral shoot elongation resulted primarily from cell divisions before vegetative bud flush and cell elongation following bud flush. The most rapid phase of shoot elongation occurred as the mitotic index decreased and cell elongation increased. The best cone induction occurred with treatments that retarded apica

APA, Harvard, Vancouver, ISO, and other styles

46

Roberts, David R., and Andreas Hamann. "Glacial refugia and modern genetic diversity of 22 western North American tree species." Proceedings of the Royal Society B: Biological Sciences 282, no. 1804 (2015): 20142903. http://dx.doi.org/10.1098/rspb.2014.2903.

Full text

Abstract:

North American tree species, subspecies and genetic varieties have primarily evolved in a landscape of extensive continental ice and restricted temperate climate environments. Here, we reconstruct the refugial history of western North American trees since the last glacial maximum using species distribution models, validated against 3571 palaeoecological records. We investigate how modern subspecies structure and genetic diversity corresponds to modelled glacial refugia, based on a meta-analysis of allelic richness and expected heterozygosity for 473 populations of 22 tree species. We find that

APA, Harvard, Vancouver, ISO, and other styles

47

Kallinen, A. K., I. L. Lindberg, A. K. Tugume, and J. P. T. Valkonen. "Detection, Distribution, and Genetic Variability of European mountain ash ringspot-associated virus." Phytopathology® 99, no. 4 (2009): 344–52. http://dx.doi.org/10.1094/phyto-99-4-0344.

Full text

Abstract:

European mountain ash ringspot-associated virus (EMARAV) was recently characterized from mountain ash (rowan) (Sorbus aucuparia) in Germany. The virus belongs tentatively to family Bunyaviridae but is not closely related to any classified virus. How commonly EMARAV occurs in ringspot disease (EMARSD) affected mountain ash trees was not reported and was investigated here. Virus-specific detection tools such as reverse transcription-polymerase chain reaction and dot blot hybridization using digoxigenin-labeled RNA probes were developed to test 73 mountain ash trees including 16 trees with no vir

APA, Harvard, Vancouver, ISO, and other styles

48

Zenner, Eric K., Erkki Lähde, and Olavi Laiho. "Contrasting the temporal dynamics of stand structure in even- and uneven-sized Picea abies dominated stands." Canadian Journal of Forest Research 41, no. 2 (2011): 289–99. http://dx.doi.org/10.1139/x10-205.

Full text

Abstract:

Although proposed as a means of increasing structural diversity in managed forests, the impact of single-tree selection on the temporal dynamics of three-dimensional structure has not been previously evaluated. Forest structural development in Picea-dominated stands was contrasted over 15 years in stem-mapped randomized plots in southern Finland that underwent either low thinning (creating the even-sized (ES) structure of a bell-shaped diameter distribution) or single-tree selection (maintaining the uneven-sized (UES) structure of a reverse-J-shaped distribution) through multiple harvest entri

APA, Harvard, Vancouver, ISO, and other styles

49

Stecconi, Marina, Javier G. Puntieri, and Daniel Barthélémy. "An architectural approach to the growth forms of Nothofagus pumilio (Nothofagaceae) along an altitudinal gradient." Botany 88, no. 8 (2010): 699–709. http://dx.doi.org/10.1139/b10-040.

Full text

Abstract:

Variations in the architecture and axis structure of different growth forms of Nothofagus pumilio (Poepp. et Endl.) Krasser (Nothofagaceae) were studied along an altitudinal gradient. We evaluated the primary growth and branching pattern of annual shoots belonging to the main axis categories (trunk, main branches, and secondary (short) branches) of four growth forms developed at different altitudes (1200–1600 m a.s.l.) in northern Patagonia: (i) low shrubs at the high-altitude timberline, (ii) high shrubs at high altitude, (iii) low trees at mid-altitude slopes, and (iv) high trees at low-alti

APA, Harvard, Vancouver, ISO, and other styles

50

Malliarou, Ermioni, Evangelia V. Avramidou, Georgios D. Ranis, and Diamantis I. Bountis. "Towards the Conservation of Monumental Taxus baccata L. Trees of Thasos Island: Genetic Insights." Forests 14, no. 12 (2023): 2384. http://dx.doi.org/10.3390/f14122384.

Full text

Abstract:

Taxus baccata L. is a tertiary relict, long-lived, wind-pollinated dioecious tree species found throughout Europe. In the rocky mountains of Thasos island, monumental old trees create a unique area of natural beauty. In recent times, the need to implement conservation measures for key endangered species such as Taxus baccata has intensified. Exploring the genetic diversity of the species is a prerequisite for successful forest management decisions aimed at conservation. In this study, 28 monumental trees from two natural populations of Thasos were investigated using eight Simple Sequence Repea

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!