scholarly journals Floristic composition, diversity and community structure in a secondary rainforest in Ibadan, Nigeria

2021 ◽  
Vol 13 (4) ◽  
pp. 183-199
Author(s):  
M. Seyni B. ◽  
O. Awodoyin R. ◽  
S. Olubode O. ◽  
A. Adeniji S. ◽  
B. Ibrahima D.
Keyword(s):  
Community Structure ◽  
Floristic Composition ◽  
Ibadan Nigeria

scholarly journals Effect of fire on a monodominant floating mat of Cyperus giganteus Vahl in a neotropical wetland

2015 ◽  
Vol 75 (1) ◽  
pp. 114-124 ◽  
Author(s):  
M. Rocha ◽  
CC. Santos Júnior ◽  
GA. Damasceno-Júnior ◽  
VJ. Pott ◽  
A. Pott
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Annual Variation ◽  
Floristic Composition ◽  
Large Area ◽  
Characteristic Species ◽  
Cyperus Giganteus ◽  
Pantanal Wetland ◽  
Floating Mat ◽  
Adult Plants

The rhizomatous Cyperus giganteus, abundant in the Pantanal wetland, can dominate extense floodable areas as monodominant communities. The Jacadigo lake has a large area of C. giganteus, where we performed an evaluation on community structure during two months in 2010, before it was hit by a wildfire which top-killed the vegetation, compared to ten months post-fire. We utilized 40 plots of 1m × 1m, along permanent trails, assessing two strata: the upper, near the inflorescence of adult plants, and the lower, close to the water level. Our results show that fire does not affect dominance of C. giganteus, as it maintained the same cover as before fire; species richness is not much altered either - 28 before fire and 34 thereafter. Fire changed the floristic composition, due to the annual variation of species and the ability of some plants to colonize gaps and to regrow after fire from underground organs and seeds. The stratification of the vegetation with characteristic species of upper and lower strata was similar after fire.

scholarly journals Vascular epiphytes of the Atlantic Forest in the Sinos River basin, state of Rio Grande do Sul, Brazil: richness, floristic composition and community structure

2015 ◽  
Vol 75 (2 suppl) ◽  
pp. 25-35 ◽  
Author(s):  
MD Barbosa ◽  
DFP Becker ◽  
S Cunha ◽  
A Droste ◽  
JL Schmitt
Keyword(s):  
Community Structure ◽  
River Basin ◽  
Atlantic Forest ◽  
Floristic Composition ◽  
Rio Grande ◽  
Shannon Index ◽  
Rio Grande Do Sul ◽  
Importance Value ◽  
Ecological Zones ◽  
Vascular Epiphytes

<p>The Atlantic Forest, which has a vast epiphytic richness, is a priority area for preservation, listed as one of the five most important world hotspots. Vascular epiphyte richness, composition and community structure were studied in two fragments, one of the ombrophilous (29º43'42"S and 50º22'00"W) and the other of the seasonal (29º40'54"S and 51º06'56"W) forest, both belonging to the Atlantic Forest biome in the Sinos River basin, Rio Grande do Sul, Brazil. In each fragment, 40 trees, divided into four ecological zones, were analyzed. In each zone, the occurrence of the species was recorded, and the importance value of each species was calculated according to the frequency of phorophytes and intervals, and cover scores. The Shannon index was calculated for the two communities. In the fragment of the ombrophilous forest (F1), 30 epiphytic species were recorded, and in the seasonal forest (F2), 25. The highest importance value was found for <italic>Microgramma squamulosa</italic> (Kaulf.) de la Sota in both fragments. The diversity indexes for F1 (H'=2.72) and F2 (H'=2.55) were similar and reflected the subtropical location of the areas. The decrease in mean richness in both fragments in zone 3 (internal crown) to zone 4 (external crown) may be associated with time and space availability for epiphyte occupation and microclimate variations. Exclusive species were found in the areas, which suggest that a greater number of preserved fragments may result in a greater number of preserved epiphytic species in the Sinos River basin.</p>

A comparative study of five cerrado areas in southern Mato Grosso, Brazil

1991 ◽  
Vol 48 (3) ◽  
pp. 307-332 ◽  
Author(s):  
A. T. Oliveira-Filho ◽  
F. R. Martins
Keyword(s):  
Community Structure ◽  
Comparative Study ◽  
Hierarchical Classification ◽  
Floristic Composition ◽  
Mato Grosso ◽  
Savanna Woodland ◽  
Classification Techniques ◽  
Polar Ordination ◽  
Cerrado Savanna

Quantitative descriptions of the woody flora and soil analyses are given for five areas of cerrado (savanna woodland) near Cuiabá, Mato Grosso state, Brazil. Comparisons are made of the floristic composition and community structure of these areas using polar ordination and hierarchical classification techniques.Descrições quantitativas da flora lenhosa e anâlises de solos são apresentadas para cinco áreas de cerrado nas proximidades de Cuiabá, Mato Grosso. São realizadas comparações entre estas areas em composição florística e estrutura comunitária utilizando técnicas de ordenação polar e classifiçãcao hierárquica.

scholarly journals Variations in floristic composition and community structure between disturbed and undisturbed lowland forest in Aklan, Philippines

2020 ◽  
pp. 1-10
Author(s):  
Cecilia I. Banag-Moran ◽  
Frederick A. Bautista ◽  
Karl Angelo M Bonifacio ◽  
Clarence Ave Martin L De Guzman ◽  
Joshua L. Lim ◽  
...  
Keyword(s):  
Community Structure ◽  
Floristic Composition ◽  
Lowland Forest

Comparison of the woody flora and soils of six areas of montane semideciduous forest in southern Minas Gerais, Brazil

1994 ◽  
Vol 51 (3) ◽  
pp. 355-389 ◽  
Author(s):  
A. T. Oliveira-Filho ◽  
E. A. Vilela ◽  
M. L. Gavilaness ◽  
D. A. Carvalho
Keyword(s):  
Community Structure ◽  
Detrended Correspondence Analysis ◽  
Floristic Composition ◽  
Rio Grande ◽  
Minas Gerais ◽  
Southeastern Brazil ◽  
Semideciduous Forest ◽  
Qualitative And Quantitative ◽  
Gallery Forests ◽  
Upper Rio Grande

Qualitative and quantitative descriptions of the woody flora and soil analyses are provided for six areas of montane semideciduous forest in the upper Rio Grande region, southern Minas Gerais, Brazil. Comparisons are made of the floristic composition of these six areas and 24 other forest areas of southeastern Brazil using ordination by detrended correspondence analysis (DCA) and hierarchical classifications, both agglomerative (upgma) and divisive (twinspan). The variation in community structure of five of the six forest areas was analysed using a two-way table yielded by twinspan. The floristic analyses indicated the strongest link between the forests of the upper Rio Grande region and other montane forest formations of southeastern Brazil as well as secondary links with the gallery forests that extend into the cerrado domain and the submontane semideciduous forests of the Rio Parana basin. Variations in community structure among the five forest areas were apparently associated mainly with riverside effects and soil fertility.

scholarly journals Floristic Composition and Community Structure of Epiphytic Angiosperms in an Urban Forest Fragment in the Eastern Amazon

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Josélia Rozanny Vieira Pacheco ◽  
Felipe Fajardo Villela Antolin Barberena
Keyword(s):  
Community Structure ◽  
Urban Forest ◽  
Diversity Index ◽  
Species Conservation ◽  
Floristic Composition ◽  
Neotropical Region ◽  
Forest Fragments ◽  
Forest Fragment ◽  
Importance Value ◽  
Vascular Epiphytes

Vascular epiphytes are one of the most important forest components, contributing to microclimatic maintenance. These plants find ideal conditions for development in the Amazon due to the spatial heterogeneity and high temperature and humidity typical of this biome. In recent years, the Brazilian Amazon has undergone dramatic changes in its landscape, mainly due to the increase in deforestation and fire rates. We present here the floristic composition and analyze the community structure of epiphytic angiosperms of an urban forest fragment in Eastern Amazon. A total of 71 epiphytic individuals were recorded belonging to eight species and four families. Orchidaceae was the most representative family, corroborating the pattern for surveys of epiphytic diversity in the Neotropical region. Epiphytic species were found on 24 individuals of 10 tree species. The epiphytic importance value (IVe) was low for all species, except for Aechmea tocantina and Rhipsalis baccifera. Cactaceae was the family with the highest IVe. Most epiphytes were found in the crown of trees (83.1%). The diversity index of the fragment was H’ = 1.80 and the equity index was J= 0.87, reflecting the absence of highly dominant species. Conservation of urban forest fragments is necessary for the maintenance of epiphytic flora and ecosystem services.

Floristic Composition and Community Structure in an Area of Cerrado in SE Brazil

Flora ◽  
1983 ◽  
Vol 173 (5-6) ◽  
pp. 433-449 ◽  
Author(s):  
Peter E. Gibbs ◽  
Hermogenes De Freitas Leitão Filho ◽  
George Shepherd
Keyword(s):  
Community Structure ◽  
Floristic Composition ◽  
Se Brazil

scholarly journals Floristic composition and community structure of epiphytic angiosperms in a terra firme forest in central Amazonia

2013 ◽  
Vol 27 (2) ◽  
pp. 378-393 ◽  
Author(s):  
Mariana Victória Irume ◽  
Maria de Lourdes da Costa Soares Morais ◽  
Charles Eugene Zartman ◽  
Iêda Leão do Amaral
Keyword(s):  
Community Structure ◽  
Floristic Composition ◽  
Terra Firme ◽  
Central Amazonia ◽  
Terra Firme Forest
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