scholarly journals Floristic composition of the Montane Forest in the Almadina-Barro Preto axis, Southern Bahia, Brazil

2014 ◽  
Vol 14 (1) ◽  
Author(s):  
Macielle Macedo Coelho ◽  
André Márcio Amorim
Keyword(s):  
Species Richness ◽  
Tropical Forests ◽  
Atlantic Forest ◽  
Floristic Composition ◽  
Woody Species ◽  
Life Forms ◽  
Montane Forest ◽  
Forest Remnants ◽  
Southern Bahia ◽  
Arboreal Habit

The aim of this study is to survey the angiosperms of two montane forest remnants in the southern Bahia, Brazil: Corcovado (SCO) and Pedra Lascada (SPL). Both fragments are located in the municipality of Almadina and Barro Preto, respectively, and are 18 km distant from each other. We sampled 899 species of angiosperms distributed in 437 genera and 116 families. The SCO was the richest area with 678 species, distributed in 367 genera and 100 families. SPL showed 466 species in 269 genera and 88 families. The percentage of species identified was 85.8% and of this total, 37.7% are endemic to the Atlantic Forest, 11.2% are endemic to southern Bahia and northern Espírito Santo and 7% are disjunct between the Atlantic Forest and Amazon. The remaining percentages (44.3%) were of species widely distributed. The richest families in the two areas were Orchidaceae (10%), Rubiaceae (7%), Bromeliaceae (5.5%), Melastomataceae (4.2%) and Poaceae (4%). The richest genera were Psychotria (2%),Piper (1.8%), Ocotea (1.6%),Vriesea (1.5%) and Peperomia (1.4%). More than half of the recorded species showed non-arboreal habit, regarding life forms documented. That comes against the assertion that many authors in the tropical forests, where species richness in angiosperms is expected for non-woody species, especially in montane forests. Twelve species have been identified as new, but seven others already described from collections previously obtained in these two areas. Orchidaceae, Rubiaceae, Poaceae and Bromeliaceae showed significant richness in this study these families are commonly reported as the richest in other inventories in the Atlantic Forest in southern Bahia reinforcing their importance to the regional flora. The high levels of richness, endemism, and the growing numbers of new taxonomic discoveries from the SPL and SCO sites indicate the biological importance of these two forest remnants. The implementation of parks or other protected environmental reserves would be essential to the conservation of its species.

scholarly journals The orchid-bee faunas (Hymenoptera: Apidae) of 'Parque Nacional do Monte Pascoal', 'Parque Nacional do Descobrimento' and three other Atlantic Forest remnants in southern Bahia, eastern Brazil

2013 ◽  
Vol 73 (2) ◽  
pp. 437-446 ◽  
Author(s):  
A Nemésio
Keyword(s):  
Atlantic Forest ◽  
Amazon Basin ◽  
First Record ◽  
The State ◽  
Orchid Bees ◽  
Orchid Bee ◽  
Eastern Brazil ◽  
Forest Remnants ◽  
Southern Bahia

The orchid-bee faunas of ‘Parque Nacional do Monte Pascoal’, ‘Parque Nacional do Descobrimento’ and three other Atlantic Forest remnants ranging from 1 to 300 ha in southern Bahia, eastern Brazil, were surveyed. Baits with seventeen different scents were used to attract orchid-bee males. Four thousand seven hundred and sixty-four males belonging to 36 species were actively collected with insect nets during 300 hours from November, 2008 to November, 2009. Richness and diversity of orchid bees found in this study are the highest ever recorded in the Atlantic Forest domain. Eufriesea dentilabris (Mocsáry, 1897) and Eufriesea violacea (Blanchard, 1840) were collected at the ‘Parque Nacional do Monte Pascoal’, the first record of these species for the state of Bahia and the northernmost record for both species. Females Exaerete dentata (Linnaeus, 1758) were also collected at ‘Parque Nacional do Monte Pascoal’ and old records of Eufriesea aeneiventris (Mocsáry, 1896) in this area makes this site the richest and most diverse concerning its orchid-bee fauna in the entire Atlantic Forest and similar to areas in the Amazon Basin.

Locally endangered tree species in a dry montane forest are enhanced by high woody species richness but affected by human disturbance

2018 ◽  
Vol 158 ◽  
pp. 19-27
Author(s):  
Mekdes Ourge Wegasie ◽  
Katrine Eldegard ◽  
Kari Klanderud ◽  
Sarah Tewolde-Berhan ◽  
Kidane Giday ◽  
...  
Keyword(s):  
Species Richness ◽  
Tree Species ◽  
Human Disturbance ◽  
Woody Species ◽  
Montane Forest ◽  
Endangered Tree ◽  
Endangered Tree Species

scholarly journals Floristic composition and dispersal syndromes in Araucaria Forest remnants in the municipality of Colombo, Paraná state, Brazil

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1771 ◽  
Author(s):  
Rafael Fernando da Silva Possete ◽  
Sandra Bos Mikich ◽  
Gerdt Guenther Hatschbach ◽  
Osmar Dos Santos Ribas ◽  
Dieter Liebsch
Keyword(s):  
Endangered Species ◽  
Biodiversity Conservation ◽  
Floristic Composition ◽  
Life Forms ◽  
Species Occurrence ◽  
Araucaria Forest ◽  
Dispersal Syndromes ◽  
Forest Remnants

This study was conducted in Araucaria Forest remnants in the municipality of Colombo, eastern Paraná state, Brazil. Data on species occurrence, life forms and dispersal syndromes were collected once a week along a 9 km transect, revealing the presence of 512 species among trees (n = 135), shrubs (n = 121), herbs (n = 157), climbers (n = 70), epiphytes (n = 24) and hemiparasites (n = 5). Of 469 species classified according to dispersal syndromes, 42.4% were zoochoric, 33.6% autochoric and 23.8% anemochoric. The high richness observed, the highest among similar studies previously conducted in the Araucaria Forest, along with the occurrence of endangered species of trees (and mammals), indicates that the study area is an important remnant for biodiversity conservation.

A new species of Tovomita Aubl. (Clusiaceae) from the Brazilian Atlantic Forest

Phytotaxa ◽  
2015 ◽  
Vol 207 (2) ◽  
pp. 193 ◽  
Author(s):  
Lucas Cardoso Marinho ◽  
Pedro Fiaschi ◽  
André Márcio Amorim
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Rio De Janeiro ◽  
Montane Forest ◽  
Minas Gerais ◽  
Brazilian Atlantic Forest ◽  
Diagnostic Characters ◽  
Southern Bahia ◽  
A New Species

Tovomita iaspidis, a new species from the Brazilian Atlantic Forest, is described, illustrated, and its morphological affinities with other species and its diagnostic characters are discussed. The new species is similar to Tovomita glazioviana, from which it can be distinguished by having greenish patent petals and larger and reddish pistillode in the staminate flowers. While T. glazioviana is found in the Atlantic Forest in the states of Bahia, Minas Gerais, and Rio de Janeiro, T. iaspidis is so far only known from two small remnant areas of montane forest in southern Bahia State, Brazil.

Floristics and Structure of Arboreal Components in a Restored Atlantic Forest Area

2020 ◽  
Author(s):  
Wiane Meloni Silva ◽  
Sebastião Venâncio Martins ◽  
Ricardo Alcántara de la Cruz ◽  
Carlos Moreira Miquelino Eleto Torres ◽  
Luiz Henrique Elias Cosimo ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Basal Area ◽  
Floristic Composition ◽  
Ecological Group ◽  
Average Height ◽  
Importance Value ◽  
Successional Stage ◽  
Forest Remnants ◽  
Semideciduous Seasonal Forest ◽  
Guarea Guidonia

Abstract Background: Coffee and livestock degrade Seasonal Semideciduous Forests in the Zona da Mata region of the Atlantic Forest biome in Brazil. The floristic composition must be studied to preserve and conserve forest remnants. The objective was to evaluate the arboreal structure, characterize the seed dispersal syndrome and the ecological group of forest species of a 45-year-old restored area in Viçosa, Minas Gerais state, Brazil. The phytosociological parameters density, frequency, dominance and importance value, Shannon's diversity and Pielou's equability were evaluated considering individuals with DBH (diameter at breast height) ≥ 5 cm in sixteen contiguous plots (25 x 25 m). Results: A total of 1,323 individuals from 109 species and 35 botanical families were registered, of which 90 were native and 15 exotic species. The importance value (VI= 11.9%) was highest for Guarea guidonia (Fabaceae). The Shannon's diversity (H') was 3.46 and the equability (J') was 0.74. The number of species (33%) was largest for the initial secondary successional class and the number of individuals with zoochoric dispersion syndrome for the late secondary class (38.3%). The basal area was 44.1 m² ha-1 and the average height was 13 m (ranging from 2 to 32 m). Conclusion: The restored Semideciduous Seasonal Forest is in an advanced successional stage with zoochoric species and a great number of late secondary species.

scholarly journals The orchid-bee fauna (Hymenoptera: Apidae) of ‘Reserva Biológica de Una’, a hotspot in the Atlantic Forest of southern Bahia, eastern Brazil

2013 ◽  
Vol 73 (2) ◽  
pp. 347-352 ◽  
Author(s):  
A Nemésio
Keyword(s):  
Atlantic Forest ◽  
Rare Species ◽  
The State ◽  
Orchid Bees ◽  
Orchid Bee ◽  
Eastern Brazil ◽  
Forest Remnants ◽  
Southern Bahia ◽  
First Time

The orchid-bee fauna of ‘Reserva Biológica de Una’ (REBIO Una), one of the largest Atlantic Forest remnants in southern Bahia, eastern Brazil, was surveyed for the first time. Baits with sixteen different scents were used to attract males of orchid bees. Eight hundred and fifty-nine males belonging to 26 species were actively collected with insect nets during 60 hours in January and February, 2009, and January, 2010. Euglossa avicula Dressler, 1982 and Euglossa milenae Bembé, 2007 have been recorded for the first time in the state of Bahia. It was found that REBIO Una has one of the most diverse and rich orchid-bee faunas of the entire Atlantic Forest domain and holds some rare species, such as Euglossa cyanochloraMoure, 1996.

scholarly journals Ecology of the Seed Bank in the Amazon Rainforest

2021 ◽  
Author(s):  
Natali Gomes Bordon ◽  
Niwton Leal Filho ◽  
Tony Vizcarra Bentos
Keyword(s):  
Land Use ◽  
Tropical Forests ◽  
Seed Bank ◽  
Floristic Composition ◽  
Life Forms ◽  
Amazon Rainforest ◽  
Seed Density ◽  
Forest Resilience ◽  
Identification Of Species ◽  
Successional Trajectory

The seed bank is directly related to forest resilience because it contributes to the greatest number of regenerants after the occurrence of disturbances. Changes in seed density, floristic composition, and life forms completely alter the successional trajectory of forest environments. These changes are directly related to land use. For example, suppression of the seed bank can occur in pastures, that experience frequent fires with increase of density of seeds and predominance of herbs are typical of highly degraded areas, such as Poaceae, Rubiaceae, Asteraceae, and Cyperaceae. Melastomataceae seedlings are an important component of the seed bank in the Amazon rainforest. On the other hand, Urticaceae has greater representation in forests that exhibit low-impact land use. Any change in seed bank functionality is bound to compromise the diversity, regeneration potential and overall maintenance of tropical forests. Therefore, it is necessary to expand studies that investigate seed banks in the Amazon rainforest. It is as important to prioritize sampling methods and pursue standardization of data presentation, as well as improve the identification of species that occur in the seed bank.

scholarly journals Soil seedbanks in natural and restored boxironbark forests at Stawell Gold Mine, Victoria

2004 ◽  
Vol 10 (1) ◽  
pp. 9 ◽  
Author(s):  
E. Comino ◽  
B. P. Miller ◽  
N. J. Enright
Keyword(s):  
Species Richness ◽  
Exotic Species ◽  
Management Practice ◽  
Seedling Emergence ◽  
Woody Species ◽  
Natural Vegetation ◽  
Weed Species ◽  
Total Species Richness ◽  
Forest Remnants ◽  
Chemical Attributes

Natural communities have the capacity to regenerate themselves, and this functional ecosystem attribute must be regarded as a key indicator of success for revegetation programmes. The accumulation of species (and individuals) as dormant propagules in a soil seedbank, representing potential future states for the vegetation, is one possible index of revegetation success. Here, we investigate the soil seedbanks for five natural vegetation (Box-Ironbark forest) remnants, a topsoil stockpile and three revegetated mine-site areas associated with gold mining at Stawell (Victoria, Australia). The revegetation efforts largely date from 1987 and, in terms of their composition and structure, are relatively similar to natural vegetation remnants. Soil samples were treated with heat or smoke (plus control) and were monitored for seedling emergence, species composition and density in the glasshouse for 150 days. Seedling densities in treated seedbank samples were high (2 200 to 17 500 seedlings m-2) while species richness was low, ranging from 10 to 20 species per sample. Exotic species made up 22?61 % of emergents and 33?50% of species observed. Correlation of seedbank composition and density with chemical attributes of soils, and with above ground (extant) vegetation at sites showed few significant relationships. Total species richness and the proportion of exotic species varied significantly between natural bushland remnants and revegetation areas. Richness was highest, and the proportion of exotic species was lowest in natural bushland samples. Total emergent numbers and the density of exotic emergents did not vary significantly between remnant bushland and revegetation areas. Declining vigour of some woody species in revegetation sites that are well represented in the seedbank, including Acacia pycnantha and A. genistifolia, indicates that the reintroduction of fire might be an appropriate management practice to facilitate long-term recovery of a functional community on these revegetated surfaces, but the potential for the establishment of weed species from the seed-bank following fire may pose a challenge to management.

scholarly journals Tree species richness and composition in a fragmented landscape of the Brazilian lowland Atlantic Forest

Rodriguésia ◽  
2020 ◽  
Vol 71 ◽  
Author(s):  
Solange de Vasconcellos Albuquerque Pessoa ◽  
Dorothy Sue Dunn de Araujo
Keyword(s):  
Tropical Forests ◽  
Biological Diversity ◽  
Floristic Composition ◽  
Southeastern Brazil ◽  
Fragmented Landscape ◽  
Floristic Similarity ◽  
Forest Diversity ◽  
Tree Layer ◽  
Α Diversity ◽  
Forest Remnants

Abstract Tropical forests are one of the most important ecosystems and loss of biological diversity in these is a major concern. We studied seven forest remnants on the coast of Rio de Janeiro, southeastern Brazil, three medium-sized (24-63 ha) and four small (5-11 ha), to assess the influence of size, degree of disturbance and isolation on composition and diversity of the tree layer. A total of 443 species in 60 families and 185 genera were recorded, with Myrtaceae, Lauraceae and Fabaceae being the most species-rich families. The results showed areas of high α-diversity (α= 34.86-75.69) and a slightly greater decline of similarity with distance between the study areas. Remnant size not explained the variation in the species composition and we found correlation between the level of disturbance and the floristic composition. The remnants had low floristic similarity, strongly influenced by the degree of disturbance. Results suggest that disturbance influences composition and diversity and confirm the importance of including both medium-sized and small remnants in the conservation of tropical forest diversity.

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