scholarly journals Community Arctio-Artemisetum vulgaris (Tx. 1942) Oberd. et al. 1967.: The most widespread ruderal community at Pancevacki rit

2009 ◽  
Vol 24 (2) ◽  
pp. 113-121
Author(s):  
Radmila Stankovic-Kalezic ◽  
Slobodan Jovanovic ◽  
Vaskrsija Janjic ◽  
Ljiljana Radivojevic
Keyword(s):  
Floristic Composition ◽  
Anthropogenic Influences ◽  
Composition And Structure

A several-year investigation of distribution, phytocoenological differentiation, floristic composition and structure of the ruderal flora and vegetation, and relative anthropogenic influences was conducted in the area of Pancevacki rit. The study focused on the ruderal community Arctio-Artemisetum vulgaris, the most widespread of 10 ruderal communities identified in a detailed phytocoenological analysis of the location of Pancevacki rit.

scholarly journals Urbanization effects on the composition and structure of macrophytes communities in a lotic ecosystem of Pernambuco State, Brazil

2016 ◽  
Vol 76 (4) ◽  
pp. 888-897 ◽  
Author(s):  
L. R. C. C. Xavier ◽  
F. Scherner ◽  
D. C. Burgos ◽  
R. C. Barreto ◽  
S. M. B. Pereira
Keyword(s):  
Urban Areas ◽  
Floristic Composition ◽  
Freshwater Ecosystems ◽  
Metropolitan Region ◽  
Macrophyte Communities ◽  
Composition And Structure ◽  
Lotic Ecosystem ◽  
Dry Seasons ◽  
Urbanized Areas ◽  
Wet And Dry Seasons

Abstract Population growth in urban areas changes freshwater ecosystems, and this can have consequences for macrophyte communities as can be seen in the municipalities that border the Capibaribe River, Pernambuco, Brazil. This study reports the effects of urbanization on the composition and structure of macrophyte communities in areas along that river. The following urbanized and non-urbanized sampling sites were chosen: Sites 1 and 2 (municipality of Santa Cruz do Capibaribe), Sites 3 and 4 (municipality of Toritama), and Sites 5 and 6 (metropolitan region of Recife). These sites were visited every two months from January to July 2013 to observe seasonal variation (wet and dry seasons). Thirty-one species were identified. Generally, the non-urbanized sites had a higher number of species. Multivariate analyses indicated significant overall differences between urbanized and non-urbanized areas (R = 0.044; p < 0.001) and between seasons (R = 0.018; p < 0.019). Owing to the large variation in physical, chemical, and biological characteristics between urbanized and non-urbanized areas, we found that urbanization significantly influenced the floristic composition and structure of macrophyte communities.

Composition and community structure of mangroves distributed on the east coast of Marajó Island, Brazil

2022 ◽  
Author(s):  
Barbara Luzia Santos de Oliveira Faro ◽  
Priscila Sanjuan de Medeiros-Sarmento ◽  
Norma Ely Santos Beltrão ◽  
Paulo Weslem Portal Gomes ◽  
Ana Cláudia Caldeira Tavares-Martins
Keyword(s):  
Floristic Composition ◽  
Distribution Patterns ◽  
Major Influence ◽  
Structural Development ◽  
Black Water ◽  
Composition And Structure ◽  
Marine System ◽  
Marajó Island ◽  
White Water ◽  
Degree Of Similarity

Abstract Mangroves in the Amazon are influenced by several environmental conditions that determine the composition and structural development of the arboreal flora, which results in different distribution patterns. In this study, we sought to answer two questions: (1) what is the composition and structure of the mangroves near the mouth of the Amazon River in Marajó Island? (2) Are the fringe and inland mangroves more similar or dissimilar in terms of floristic composition? For this, we delimited a fringe zone and an inland zone about 1 km apart from each other. In each zone, we distributed five 400-m2 plots. The individuals were grouped into diameter and height classes and structural and phytosociological parameters were calculated. Ten species were recorded in the mangroves, of which seven are typical of white-water (várzea) and black-water (igapó) flooded forest ecosystems. We believed the adjacent ecosystems and the hydrological network are inducing the establishment of such species. The composition and structure of mangroves did not differ statistically between zones, and the degree of similarity may be a result of similar environmental factors in these zones such as low relief and high frequency of macrotides. We conclude that the vegetation of the studied mangroves has a major influence of the fluvial-marine system of the great rivers of the Amazon associated with a diversity of ecosystems that, together, generate greater floristic richness when compared to mangroves in other regions.

DIVERSITAS FLORISTIK DAN STRUKTUR VEGETASI DI HUTAN GUNUNG PAYUNG, TAMAN NASIONAL UJUNG KULON

2018 ◽  
Vol 17 (3) ◽  
Author(s):  
Purwaningsih Purwaningsih ◽  
Tika D. Atikah
Keyword(s):  
Forest Structure ◽  
National Park ◽  
Floristic Composition ◽  
Forest Stand ◽  
Floristic Diversity ◽  
Lagerstroemia Speciosa ◽  
Large Numbers ◽  
Composition And Structure ◽  
Quadrat Method ◽  
Artocarpus Elasticus

A floristic diversity and vegetation forest structure was carried out on the Mount Payung, Ujung Kulon National Park. The objective was to floristic composition and structure of the forest located at the peninsula of Ujung Kulon, Banten. The study was conducted using the quadrat method by establishing plots of 5000 m2 each at two locations Pasir Ipis and Gunung Keneng, thus the total area sampled was 1 ha. They were Plot Pasir Ipis and Plot Gunung Keneng. A total of 1898 trees comprising 105 species of 74 genera and 43 families were recorded. The number of species at Pasir Ipis higher (90 species) than plot Gn Keneng (61 species). Based on calculation the important value indexes (IVI), there were some dominan species with IVI >10 at Pasir Ipis Neesia altissima (IV=21,55), Barringtonia racemosa (17,89), Payena acuminata (13,35) and Neonauclea lanceolata (12,37). The dominated species at Plot Gn Kendeng were Pseuduvaria reticulata (IV= 34,30), Dillenia excelsa (27,62), Lagerstroemia speciosa (20,89), Popowia pisocarpa (17,57). The structure of forest could be inferred from the diameter and height of trees. The diameter measurements showed that 75,57 % of trees in plot Pasir Ipis and 80,51 % in plot Gunung Kendeng consist of small individuals with diameters between 10-20 cm. Trees with large diameters of >100 cm occurred in two plots among them Barringtonia racemosa, Polyalthia lateriflora, Popowia pisocarpa, Artocarpus elasticus. The presence of large numbers of small trees and lesser numbers of trees with large diameters in a forest stand indicated that the stand was regenerating after heavy disturbance. The presence of the majority of trees with height of < 20 m (99 %) further confirmed the forest’s dynamic status.

Stand structure and growth form of the birch transition community in an industrially damaged ecosystem, Sudbury, Ontario

1985 ◽  
Vol 15 (5) ◽  
pp. 809-817 ◽  
Author(s):  
G. I. James ◽  
G. M. Courtin
Keyword(s):  
Forest Fires ◽  
Growth Form ◽  
Stand Structure ◽  
Floristic Composition ◽  
Past Century ◽  
Morphological Development ◽  
Metal Mining ◽  
Composition And Structure ◽  
Woodland Regeneration ◽  
Crown Dieback

The anthropogenic birch transition community has developed in the vicinity of Sudbury, Ont., as a result of base-metal mining and smelting, logging, and forest fires over the past century. This study investigates the floristic composition and structure of an exposed ridge site and a protected woodland site in this community, a coppice woodland dominated by Betulapapyrifera Marsh. and Acerrubrum L. For convenience in the field, vegetation was classified into growth forms I to V on the basis of morphological development and stem diameter to separate multiple-stemmed stools from single-stemmed individuals and seedlings from saplings of seedling size but older than 1 year. The ridge was dominated by small stools (growth form II) of B. papyrifera, whereas both large stools (growth form I) and small stools of B. papyrifera and A. rubrum characterized the woodland. No A. rubrum and only a few B. papyrifera seedlings became established at the ridge. Seedlings that survive develop into growth form II while still less than 1 m high. At the woodland, regeneration also was low, but A. rubrum seedlings were more frequent than those of B. papyrifera. Lack of seedlings, the persistence of coppicing, and periodic crown dieback maintain this coppice woodland in its present form so that little change with time is expected.

Grazing and fire in two subalpine peatlands

2007 ◽  
Vol 55 (1) ◽  
pp. 42 ◽  
Author(s):  
Keith L. McDougall
Keyword(s):  
Exotic Species ◽  
Native Species ◽  
Floristic Composition ◽  
High Plains ◽  
Composition And Structure ◽  
North Eastern ◽  
Salix Cinerea ◽  
Burnt Areas

The floristic composition and structure of peatland vegetation in adjoining subalpine catchments of the Bogong High Plains (north-eastern Victoria) were monitored between 1979 and 2006. Grazing by cattle had been excluded from one catchment since 1946, when it was fenced. Peatland vegetation in both catchments was partially burnt in a wildfire in 2003. Between 1979 and 1999, in the ungrazed peatland, the cover of Sphagnum cristatum Hampe and Baeckea gunniana Schauer increased and the cover of pools decreased, whereas in the grazed peatland the cover of B. gunniana and Epacris paludosa R.Br. decreased and the cover of Empodisma minus (Hook.f.) L.A.S.Johnson & D.F.Cutler increased. The cover of all recorded species decreased following a fire in 2003. Between 2004 and 2006, a significant increase in cover was detected in two of eight species measured in burnt areas. In burnt areas, the number of native species per quadrat increased in the grazed peatland and the numbers of exotic species per quadrat increased in both peatlands over that period. By 2006, the peatlands had largely recovered floristically from the 2003 fires but it is likely to be decades before the cover of S. cristatum and Richea continentis B.L.Burtt. reaches pre-fire levels. Control of several exotic species that established after the fire (especially Salix cinerea L. and Juncus spp.) may be required.

scholarly journals Diversity, floristic composition, and structure of the woody vegetation of the Cerrado in the Cerrado–Amazon transition zone in Mato Grosso, Brazil

2015 ◽  
Vol 38 (4) ◽  
pp. 877-887 ◽  
Author(s):  
Leonardo Maracahipes Santos ◽  
Eddie Lenza ◽  
Josias Oliveira dos Santos ◽  
Beatriz Schwantes Marimon ◽  
Pedro V. Eisenlohr ◽  
...  
Keyword(s):  
Transition Zone ◽  
Floristic Composition ◽  
Woody Vegetation ◽  
Mato Grosso ◽  
Composition And Structure

scholarly journals Floristic Composition and Structure in Relation to Elevation in the Togo Plateau Forest Reserve in Ghana

2020 ◽  
Vol 1 (6) ◽  
Author(s):  
Gilchrist K. Faith Dogor ◽  
Emmanuel Acquah ◽  
Alexander K. Anning
Keyword(s):  
Elevation Gradient ◽  
Basal Area ◽  
Floristic Composition ◽  
Species Identity ◽  
R Software ◽  
Elevation Gradients ◽  
Forest Reserve ◽  
Composition And Structure ◽  
Special Scientific ◽  
Geographical Locations

Plateau ecosystems are of special scientific and conservation interests as they harbour rich plant diversity and exhibit considerable spatial variability along elevation gradients. In this study, variations in floristic composition and structure in relation to elevation were studied in six-fringed communities Hohoe (HH), Alavanyo (AL), Santrokofi (SA), Akpafu (AK), Bowuri (BO), and Nkonya (NK) of the Togo Plateau Forest Reserve in Ghana to better provide explicit and effective management of this ecological hotspot. A total of 180 plots (each measuring 25m × 25m) were demarcated across the six communities for sampling of trees (DBH measured at 1.3 m above ground ≥10 cm). Smaller nested plots, measuring 5m × 5m and 1m × 1m were used for sampling saplings (DBH < 10 cm, height > 1.5 m) and seedlings (DBH < 3 cm, height < 1.5 m), respectively. Species identity and abundance and elevation were recorded for each plot. Relationships of elevation gradients with vegetation attributes were analysed using simple linear regression and R software package. A total of 281 plant species (164 trees, 60 saplings and 57 seedlings) belonging to 66 families were recorded in the study. Leguminosae, Apocynaceae and Euphorbiaceae were the most dominant families across and along the elevation gradient. The average basal area of trees was calculated as 44.72 m2/ha and varied across the six communities (ranged from 57.10 m2/ha at BO to 33.10 m2/ha at AL) whereas the Shannon-Weiner Index (H’) averaged as 3.99 and varied across the six communities (ranged from4.14 m2/ha at BO to 3.89m2/ha at AL) and evenness index averaged as 0.96 (ranged from1.00at BO to 0.92 at AL). The saplings and seedlings also follow a similar pattern of composition and structure. The geographical locations of the study communities which somehow correspond with different elevations to the plateau (i.e., BO, NK occur in lower elevations, SA, AL in mid elevations and HH, AL in higher elevations) has been identified as the drivers of the composition and structure across the communities on the landscape. The most important trees listed in the study were C. pentandra, A. zygia, and T. superba. The saplings were A. camerunensis, M. puberula and C. ferruginea. The seedlings were C. odorata, P. hirsuta and C. affer. The most important tree species listed were distributed along a broad range of elevation. Results obtained revealed high biodiversity of the plateau. These findings may lead to a better understanding of the composition and structure of several plateau ecosystems found in Ghana and elsewhere.

scholarly journals Floristic composition of oak forests and oriental hornbeam scrubs on mt. Vidlič in the first three years after a wildfire

2018 ◽  
pp. 11-28
Author(s):  
Ljubinko Rakonjac ◽  
Marija Marković ◽  
Biljana Nikolić ◽  
Aleksandar Lučić ◽  
Tatjana Ratknić
Keyword(s):  
Forest Fires ◽  
Recovery Time ◽  
Continuous Monitoring ◽  
Floristic Composition ◽  
Grass Species ◽  
Oak Forests ◽  
First Year ◽  
Complete Destruction ◽  
Composition And Structure ◽  
Previous State

After a catastrophic wildfire on Vidlič Mountain in 2007, which among other things burned oak forests and hornbeam scrubs, their floristic composition was monitored for three years. Phytosociological surveys were carried out in the field using the Braun-Blanquet method, and the results are presented in the form of a synthetic phytosociological table. It was observed that in the stands in which the vegetation was only partially damaged, a shorter recovery time was required to return to the previous state - as it was before the wildfire. The initial stages of vegetation recovery at sites where complete destruction of vegetation occurred were characterized by a strong presence of annual therophytes: Orlaya grandiflora, Sideritis montana, Geranium dissectum, Althaea hirstuta. The first year after the wildfire was characterized by the dominance of annual species of Bupleurum praealtum, Crepis setosa and Centaurea calcitrap, which were not recorded in the monitored stands in the second and third year after the wildfire. In the second and third year after the wildfire, perennial plants and various grass species assumed dominance. It is necessary to conduct further systematic and continuous monitoring of the floristic composition and structure of the oak forests that completely burned in the wildfire, as well as an analysis of the profitability of the restitution of oak forests damaged by forest fires in Serbia.

scholarly journals Komposisi Jenis dan Struktur Vegetasi Tepi Hutan, Taman Nasional Gunung Ciremai, Jawa Barat

2021 ◽  
Vol 7 (1) ◽  
pp. 17-24
Author(s):  
Suci Dian Hayati Iskandar ◽  
Dwika Bramasta ◽  
Peniwidiyanti ◽  
Nilna Kamala ◽  
Muhammad Basrowi ◽  
...  
Keyword(s):  
Species Composition ◽  
Plant Species ◽  
National Park ◽  
Floristic Composition ◽  
Water Source ◽  
Quantitative Structure ◽  
Forest Edges ◽  
Source Areas ◽  
Composition And Structure ◽  
J Curve

Mount Ciremai National Park has a high ecological function as a major catchment and water source areas. The objective of this research was to obtain information on floristic composition and structure in the edge forest of Seda Block, Mount Ciremai National Park. To carried out the research, the method used in the analysis vegetation was quadrat transect at an elevation of 602-614 m asl. The results showed that species composition dominated by the families of Euphorbiaceae and Moraceae, consisting of 3 stratas of heading A to C where strata A occupied by Elaeocarpus sp. (40 m) and Ficus involucrata (30 m). Ficus involucrata has the widest heading cover on the observation plot. The condition of the forest quantitative structure generally demonstrates good conditions by forming a reversed J curve, as well as a relatively moderate diversity of plant species and there are no species of plant that dominate the forest edges.

scholarly journals COMPOSIÇÃO E ESTRUTURA DO COMPONENTE ARBÓREO DE UM REMANESCENTE DE FLORESTA OMBRÓFILA MISTA

FLORESTA ◽  
2001 ◽  
Vol 31 (12) ◽  
Author(s):  
Raquel R.B. Negrelle ◽  
Ramoci Leuchtenberger
Keyword(s):  
Basal Area ◽  
Floristic Composition ◽  
Total Density ◽  
Araucaria Angustifolia ◽  
Importance Value ◽  
Generic Level ◽  
Dead Trees ◽  
Composition And Structure ◽  
Forest Remnant ◽  
Abstract Data

São apresentados dados de levantamento florístico-estrutural realizado em remanescente de Floresta Ombrófila Mista (Mata da Fortaleza) no Parque Estadual de Vila Velha, Ponta Grossa - PR (23° 3’ S, 50° 15’ W). Na aplicação do método de quadrantes (75 pontos) foram registrados 300 indivíduos arbóreos (DAP > 15 cm), sendo 11 arvores mortas em pé. Dentre os indivíduos vivos, catalogaram-se 67 morfo-espécies sendo 37 identificadas em nível de espécie, 15 em nível de gênero, 7 em nível de família e 8 não puderam ser identificadas. Para estes indivíduos detectou-se um valor de diversidade H’=3,538 (var. = 0,00413), densidade total de 658 árvores/hectares e área basal total de 32,97 m2. Cerca de 59 % dos indivíduos amostrados foram classificados como macrofanerófitos e 41% como mesofanerófitos, não ocorrendo registro de nanofanerófitos. As espécies de maiores valores estruturais foram Ocotea odorifera (VI=40,19), Araucaria angustifolia (VI= 30,39), Ocotea acutifolia (VI=19,0) e Luehea divaricata (VI=18,44). Floristic composition and structure of an Araucarian forest remnant Abstract Data from a floristic and structural survey in an araucarian forest remnant (called Mata da Fortaleza) in the Vila Velha State Park (Ponta Grossa - PR - 23° 3’ S, 50° 15’ W) are presented. With the application of the point-centered quarter method (75 sampling points), 300 trees (dbh > 15cm) were sampled, including 11 dead trees. Within the alive individuals, 67 morpho-species were detected, 37 identified at a species level, 15 at a generic level, 07 at a family level and 8 were not identified. For the alive component the diversity was H’=3.538 (var. = 0.00413), total density was 658 trees/hectare and the total basal area was 32.97 m2. Almost 59 % of all sampled individuals was classified as macrofanerophyte and 41% as mesofanerophyte, with no register of nanofanerophytes. The species with the greatest importance value were: Ocotea odorifera (40,19), Araucaria angustifolia (30,39), Ocotea acutifolia (19,0) and Luehea divaricata (18,44).

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