scholarly journals Interpopulation genetic-ecological variation of Scots pine (Pinus sylvestris L.) in Serbia

Genetika ◽  
2011 ◽  
Vol 43 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Aleksandar Lucic ◽  
Vasilije Isajev ◽  
Rade Cvjeticanin ◽  
Ljubinko Rakonjac ◽  
Marijana Novakovic ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Pinus Sylvestris ◽  
Plant Community ◽  
Plant Communities ◽  
Scots Pine ◽  
Seed Protein ◽  
Genetic Research ◽  
Community Research ◽  
Ecological Variation ◽  
The Third

The genetic-ecological variation of Scots pine (Pinus sylvestris L.) in Serbia was studied in the populations at five localities in western and south-western Serbia. Three groups of Scots pine (Pinus sylvestris L.) populations were differentiated based on genetic research (seed protein analysis) and plant community research. The first group consists of Scots pine populations on Sargan (FMU ?Sargan?) and on Tara (FMU ?Kaluderske Bare?), where the forests belong to the community of Scots pine and Austrian pine (Pinetum sylvestris-nigrae Pavlovic 1951). The second group covers the localities Stolovi (FMU ?Radocelo-Crepuljnik?) and Zlatar (FMU ?Zlatar I?), where the forests belong to the community of Scots pine and spruce (Piceo abietis-Pinetum sylvestris Stefanovic 1960). The third group comprises the Scots pine population on Pester (FMU ?Dubocica-Bare?) which belongs to the community of Scots pine with erica (Erico-Pinetum sylvestris Stefanovic 1963). Cluster analysis was performed on the basis of seed protein data and showed that there are three groups of Scots pine populations. The three populations coincide with plant communities. The community of Scots pine with erica (Erico-Pinetum sylvestris Stefanovic 1963) recorded on Pester at the locality ?Dubocica- Bare? in the area of FE ?Golija? Ivanjica, is a special Scots pine population displayed at the greatest distance from all other populations in the cluster analysis dendrogram.

scholarly journals Phytosociological surveys: tools for weed science?

2013 ◽  
Vol 31 (2) ◽  
pp. 469-482 ◽  
Author(s):  
G. Concenço ◽  
M. Tomazi ◽  
I.V.T. Correia ◽  
S.A. Santos ◽  
L. Galon
Keyword(s):  
Cluster Analysis ◽  
Plant Species ◽  
Plant Community ◽  
Plant Communities ◽  
Distinct Group ◽  
Weed Science ◽  
Comprehensive Overview ◽  
Ecological Evaluation ◽  
Natural Plant ◽  
Ecological Basis

In simple terms, a phytosociological survey is a group of ecological evaluation methods whose aim is to provide a comprehensive overview of both the composition and distribution of plant species in a given plant community. To understand the applicability of phytosociological surveys for weed science, as well as their validity, their ecological basis should be understood and the most suitable ones need to be chosen, because cultivated fields present a relatively distinct group of selecting factors when compared to natural plant communities. For weed science, the following sequence of steps is proposed as the most suitable: (1) overall infestation; (2) phytosociological tables/graphs; (3) intra-characterization by diversity; (4) inter-characterization and grouping by cluster analysis. A summary of methods is established in order to assist Weed Science researchers through their steps into the realm of phytosociology.

A Quantitative Study of Soil-Plant Relations in the Eastern Goldfields of Western Australia.

1998 ◽  
Vol 20 (1) ◽  
pp. 119 ◽  
Author(s):  
B Fergusson ◽  
AJ Graham
Keyword(s):  
Cluster Analysis ◽  
Multivariate Analysis ◽  
Plant Community ◽  
Plant Communities ◽  
Western Australia ◽  
Environmental Variables ◽  
Function Analysis ◽  
Field Site ◽  
Disturbed Areas ◽  
Exchangeable Ca

The soil and plants at a 27.4 ha field site near Kalgoorlie, Western Australia, were surveyed and analysed with multivariate statistics. Cluster analysis identified four distinct plant communities at the study site. These were: Acacia acuminata shrubland Eucalyptus gvfithsii woodland Eucalyptus salrnonophloia woodland 'Ground Covers' - areas characterised by the presence of generalist herbs, low shrubs and weeds, and the absence of dominant upper storey species. Discriminant function analysis identified site elevation and soil exchangeable Ca as the primary environmental discriminants between the plant communities. Using these two variables, sample points were classified into one of the four plant communities. The two methods of classification matched well, with classification based on the two environmental variables providing an indication of which plant community would be most likely to establish in disturbed areas. This type of information can be important to revegetation programs in the region, guiding the use of appropriate plant species under different rehabilitation conditions. Key wcrds: environmental variables, plant communities, multivariate analysis, classification, revegetation

scholarly journals Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs

2001 ◽  
Vol 79 (6) ◽  
pp. 739-746 ◽  
Author(s):  
José M Gómez ◽  
José A Hódar ◽  
Regino Zamora ◽  
Jorge Castro ◽  
Daniel García
Keyword(s):  
Spatial Structure ◽  
Pinus Sylvestris ◽  
Plant Communities ◽  
Scots Pine ◽  
The Other ◽  
High Mountain ◽  
Associational Resistance ◽  
Southeastern Spain ◽  
Associational Susceptibility ◽  
Mechanical Barrier

The spatial structure of plant communities as well as the quality and abundance of neighbours can strongly influence the intensity of herbivory suffered by a plant. In this paper, we study the effect of the association with shrubs on the ungulate herbivory suffered by Scots pine (Pinus sylvestris var. nevadensis Christ., Pinaceae) saplings in two isolated, fragmented populations in southeastern Spain. For this, we monitored herbivory on saplings with regard to the microhabitat in which they grew. We distinguished pines growing in open interspaces, on the edge of shrubs and within the canopy of shrubs, and also we distinguished four functional types of shrubs: thorny shrubs, nonthorny shrubs, thorny scrubs, and nonthorny scrubs. Our results show that association with shrubs increases the damage inflicted on Scots pine saplings. In fact, saplings growing in the open patches, far from the shrubs, escaped from herbivory more frequently and incurred less damage than did saplings growing close to shrubs. However, herbivory was also reduced when pine saplings were completely surrounded by shrubs, since then they served as a mechanical barrier. The type of neighbouring shrub did not affect the overall damage suffered by pines, despite the fact that the ungulates damaged the nonthorny scrubs more intensely than the other kinds of shrubs. Consequently, saplings have an advantage when growing within the canopy of shrubs; these constitute key microsites for pine recruitment in these Mediterranean forests.Key words: associational resistance, associational susceptibility, mammalian herbivory, Mediterranean high mountain, neighbouring effects, Pinus sylvestris var. nevadensis.

scholarly journals Plant Community Analysis along Environmental Gradients in Moist Afromontane Forest of Gerba Dima, South-western Ethiopia

2020 ◽  
Author(s):  
Abyot Dibaba Hundie ◽  
Teshome Soromessa Urgessa ◽  
Bikila Warkineh Dullo
Keyword(s):  
Cluster Analysis ◽  
Species Diversity ◽  
Plant Species ◽  
Plant Community ◽  
Plant Communities ◽  
Environmental Gradients ◽  
Floristic Composition ◽  
Regional Government ◽  
Community Types ◽  
Western Ethiopia

Abstract Background This study was carried out in Gerba Dima Forest, South-Western Ethiopia, to determine the floristic composition, species diversity and community types along environmental gradients. Ninety sample plots having a size of 25 × 25 m (625 m2) were laid by employing stratified random sampling. Nested plots were used to sample plants of different sizes and different environmental variables. All woody plant species with Diameter at breast height (DBH) ≥ 2.5 cm and height ≥ 1.5 m were recorded in 25 m X 25 m plots. Within the major plots, five 3 m x 3 m subplots (9 m2) was used to collect shrubs with dbh < 2.5 cm and > 1.5 m height. Within each 9 m2subplots, two 1 m2 subplots were used to collect data on the species and abundance of herbaceous plants. Hierarchical (agglomerative) cluster analysis was performed using the free statistical software R version 3.6.1 using package cluster to classify the vegetation into plant community types. Redundancy Analysis (RDA) ordination was used in describing the pattern of plant communities along an environmental gradient. Result One hundred and eighty plant species belonging to 145 genera, 69 families and comprising of 15 endemic species were recorded. Cluster analysis resulted in five different plant communities and this result was supported by the ordination result. RDA result showed altitude was the main environmental variable in determining the plant communities. The ANOVA test indicated that the five community types differ significantly from each other with regard to EC and K. Conclusions The studied forest can play a significant role in biodiversity conservation since it harbours high species diversity and richness. Thus, all Stakeholders including Oromia Forest and wildlife enterprise (OFWE) and the regional government should work to designate the forest as a biosphere reserve and being registered under UNESCO.

scholarly journals Differentiation of natural populations of the Scots pine (Pinus sylvestris L.) in Ukrainian Polissya based on the findings of research into the morphological markers of cones and seeds

Biologija ◽  
2017 ◽  
Vol 63 (1) ◽  
Author(s):  
Olga Mazhula ◽  
Yaroslav Fuchylo ◽  
Alyona Gordiyaschenko
Keyword(s):  
Cluster Analysis ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Natural Populations ◽  
Reproductive Organs ◽  
Morphological Markers ◽  
Large Variability ◽  
Native Populations

Research into variability of morphological markers of the reproductive organs in nine natural populations of the  Scots pine of Ukrainian Polissya (Volyn, Rivne, Zhytomyr, and Kyiv regions) was carried out during which the colour of cones, seeds, winged seeds, and the apophysis of the cones of the trees of native populations of the Scots pine were examined. The quantity and percentage of different morphological forms of the  cone and seeds of the  trees of investigated populations were defined. Trees with hooked (f. reflexa) apophysis of the cone (turning upwards) were discovered. As shown in the results of investigations, natural populations of the  Scots pine of Ukrainian Polissya are characterized by a  large variability of morphological forms. Altogether, 17 new forms of apophysis were described. Cluster analysis of a complex of morphological markers was conducted. It showed differentiation of some populations from the Rivne region.

Vascular plant communities of a polar oasis at Alexandra Fiord (79° N), Ellesmere Island, Canada

1989 ◽  
Vol 67 (4) ◽  
pp. 1126-1136 ◽  
Author(s):  
M. Muc ◽  
B. Freedman ◽  
J. Svoboda
Keyword(s):  
Cluster Analysis ◽  
Plant Species ◽  
Plant Community ◽  
Plant Communities ◽  
Vascular Plants ◽  
Vascular Plant ◽  
Detrended Correspondence Analysis ◽  
High Arctic ◽  
Ellesmere Island ◽  
Community Types

A cluster analysis was used to apportion 136 stands in a High Arctic lowland among six vascular plant community types. These communities are described on the basis of the average prominence values of vascular species and the total cover of macroalgae, bryophytes, lichens, and vascular plants within the designated clusters of stands. The relationships among the community types was explored by a detrended correspondence analysis. The ordination of stands showed considerable floristic overlap among the most widespread plant communities on the lowland. This largely reflects the microtopographic heterogeneity of the sites, the relatively depauperate flora of the High Arctic, and the considerable ecological amplitude of the most prominent vascular plant species.

scholarly journals The effect of beetles on the dispersal stages of Bursaphelenchus mucronatus Mamiya & Enda (Nematoda: Aphelenchoididae) in wood chips of Pinus sylvestris L.

1992 ◽  
Vol 3 (4) ◽  
pp. 195-203 ◽  
Author(s):  
Jyrki Tomminen
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Close Contact ◽  
Wood Chips ◽  
Hylobius Abietis ◽  
The Third ◽  
Bursaphelenchus Mucronatus ◽  
Dispersal Stage ◽  
Pine Wood Chips ◽  
Acanthocinus Aedilis

The effect of the presence of beetle adults (Monochamus galloprovincialis, Acanthocinus aedilis, Rhagium inquisitor and Hylobius abietis) in Scots pine wood chips on the occurrence of the third (Lᵢᵢᵢ) and the fourth (Lᵢᵥ) dispersal stage of the nematode Bursaphelenchus mucronatus was studied. Possible infestation of the beetles with Lᵢᵥ of the nematode while being in close contact with the pine chips was also explored. Adults of M. galloprovincialis and A. aedilis contributed to B. mucronatus Lᵢ formation in the chips. Callow adults of M. galloprovincialis were more efficient elicitors of moulting of Lᵢᵢᵢ into Lᵢᵥ than emerged beetles of the same species. Only M. galloprovincialis adults became infested with Lᵢᵥ callow beetles containing more nematodes than emerged beetles.

scholarly journals Biodiversity and Classification of Plant Communities of Sabaloka area-central Sudan

2021 ◽  
pp. 18-24
Author(s):  
Adam Bashir ◽  
Hatil Alkamali ◽  
Maha Elkordofani ◽  
Abdelrahman H Baleela
Keyword(s):  
Cluster Analysis ◽  
Species Diversity ◽  
Plant Community ◽  
Plant Communities ◽  
Field Trips ◽  
River Nile ◽  
Central Sudan ◽  
Trees And Shrubs

The study was carried out during the period 2016 – 2018, through several extensive and intensive field trips that covered deferent habitats (Wadis & River Nile banks) of Sabaloga area central Sudan. The study dealt with Analysis of plant communities which include species diversity and classification of plants communities by Cluster Analysis (CA).The species diversity in Wadis for trees and shrubs was lower than the diversity of herbs , while it was higher in River Nile Banks for both trees and herbs.The study shown that the study area was included seven plant communities located in two sites. Site 1 was represented by six Wadis which included six plant communities. Site 2 was represented by River Nile Banks which included one plant community (Community 7).

scholarly journals Plant Community Analysis along Environmental Gradients in Moist Afromontane Forest of Gerba Dima, South-western Ethiopia

2021 ◽  
Author(s):  
Abyot Dibaba Hundie ◽  
Teshome Soromessa Urgessa ◽  
Bikila Warkineh Dullo
Keyword(s):  
Cluster Analysis ◽  
Species Diversity ◽  
Plant Species ◽  
Plant Community ◽  
Plant Communities ◽  
Environmental Gradients ◽  
Floristic Composition ◽  
Endemic Plant ◽  
Community Types ◽  
Western Ethiopia

Abstract Background: This study was carried out in Gerba Dima Forest, South-Western Ethiopia, to determine the floristic composition, species diversity and community types along environmental gradients. Ninety sample plots having a size of 25 X 25m (625m2) were laid by employing stratified random sampling. Nested plots were used to sample plants of different sizes and different environmental variables. All woody plant species with Diameter at breast height (DBH) ≥ 2.5 cm and height ≥ 1.5m were recorded in 25 m X 25 m plots. Hierarchical (agglomerative) cluster analysis was performed using the free statistical software R version 3.6.1 using package cluster to classify the vegetation into plant community types. Redundancy Analysis (RDA) ordination was used in describing the pattern of plant communities along an environmental gradient. Result: One hundred and eighty plant species belonging to 145 genera, 69 families and comprising of 15 endemic species were recorded. Of these, 52 species (28.9%) were trees, 6 species (3.33%) were Trees/shrubs, 31 species (17.22%) were shrubs, 76 species (42.22%) were herbs, and 15 species (8.33%) were Lianas. Rubiaceae, Acanthaceae and Asteraceae were the richest family each represented by 11 genera and 11 species (6.11%), 9 genera and 11 species (6.11%), 6 genera and 11 species (6.11%), respectively of total floristic composition. Cluster analysis resulted in five different plant communities and this result was supported by the ordination result. RDA result showed altitude was the main environmental variable in determining the plant communities. The ANOVA test indicated that the five community types differ significantly from each other with regard to Electrical Conductivity and Potassium. Conclusions: Description of floristic diversity of species in Gerba Dima forest revealed the presence of high species diversity and richness. The presence of endemic plant species in the study forest shows the potential of the area for biodiversity conservation.

scholarly journals Plant Community Analysis along Environmental Gradients in Moist Afromontane Forest of Gerba Dima, South-western Ethiopia

2020 ◽  
Author(s):  
Abyot Dibaba Hundie ◽  
Teshome Soromessa Urgessa ◽  
Bikila Warkineh Dullo
Keyword(s):  
Cluster Analysis ◽  
Species Diversity ◽  
Plant Species ◽  
Plant Community ◽  
Plant Communities ◽  
Environmental Gradients ◽  
Regional Government ◽  
Afromontane Forest ◽  
Community Types ◽  
Western Ethiopia

Abstract Background: This study was carried out in Gerba Dima Forest, South-Western Ethiopia, to determine the floristic composition, species diversity and community types along environmental gradients. Ninety sample plots having a size of 25 X 25m (625m 2 ) were laid by employing stratified random sampling. Nested plots were used to sample plants of different sizes and different environmental variables. All woody plant species with Diameter at breast height (DBH) ≥ 2.5 cm and height ≥ 1.5m were recorded in 25 m X 25 m plots. Within the major plots, five 3m x 3m subplots (9m 2 ) was used to collect shrubs with dbh < 2.5 cm and > 1.5m height. Within each 9m 2 subplots, two 1m 2 subplots were used to collect data on the species and abundance of herbaceous plants. Hierarchical (agglomerative) cluster analysis was performed using the free statistical software R version 3.6.1 using package cluster to classify the vegetation into plant community types. Redundancy Analysis (RDA) ordination was used in describing the pattern of plant communities along an environmental gradient. Result: One hundred and eighty plant species belonging to 145 genera, 69 families and comprising of 15 endemic species were recorded. Cluster analysis resulted in five different plant communities and this result was supported by the ordination result. RDA result showed altitude was the main environmental variable in determining the plant communities. The ANOVA test indicated that the five community types differ significantly from each other with regard to EC and K. Conclusions: The studied forest can play a significant role in biodiversity conservation since it harbours high species diversity and richness. Thus, all Stakeholders including Oromia Forest and wildlife enterprise (OFWE) and the regional government should work to designate the forest as a biosphere reserve and being registered under UNESCO. Keyword s: Gerba Dima; Indicator species; Moist Afromontane Forest; Species diversity

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