Germination characteristics of Syngonanthusseeds (Eriocaulaceae) incampos rupestresvegetation in south-eastern Brazil

2010 ◽  
Vol 21 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Patrícia G. Oliveira ◽  
Queila S. Garcia
Keyword(s):  
Geographic Distribution ◽  
Campos Rupestres ◽  
Continuous Darkness ◽  
Eastern Brazil ◽  
Light Requirements ◽  
Germination Characteristics ◽  
Minas Gerais State ◽  
Water Conditions ◽  
Different Temperatures ◽  
Soil Water Conditions

AbstractThe present study evaluated the size and germination characteristics of seeds of seven species ofSyngonanthus(distributed among four sections) that occur in different microhabitats incampos rupestresvegetation in Minas Gerais State, to determine if (1) the germination responses of the various species characterize a single germination pattern for the genus; and (2) there is a correlation between the germination characteristics and the geographic distribution as well as the microhabitat of the different species. The experiments were undertaken with recently collected seeds exposed to a 12-h photoperiod and continuous darkness, at constant temperatures of 10–40°C (at intervals of 5°C) in germination chambers. The results indicated the existence of a pattern of reduced seed size and light requirements for germination within the genus. The geographic distribution of different species of the genus cannot be explained by the responses of seed germination to different temperatures, but suggests some relationship to their edaphic microhabitats. Therefore, germination characteristics of the populations studied may have been selected to colonize specific environments at different soil water conditions.

Germination patterns and ecological characteristics of Vellozia seeds from high-altitude sites in south-eastern Brazil

2013 ◽  
Vol 23 (1) ◽  
pp. 67-74 ◽  
Author(s):  
Letícia A. Soares da Mota ◽  
Queila S. Garcia
Keyword(s):  
Light Sensitivity ◽  
Mountain Range ◽  
Continuous Darkness ◽  
South Eastern ◽  
Eastern Brazil ◽  
Germination Characteristics ◽  
Wide Range ◽  
Minas Gerais State ◽  
High Degree ◽  
Seed Characteristics

AbstractThe present work aims to determine whether there are patterns of seed and germination characteristics in Vellozia due to the phylogenetic proximity among the species examined and if these characteristics explain their restricted geographical distributions. We evaluated the germination characteristics of freshly collected seeds from 13 species of the genus Vellozia (Velloziaceae) that show different degrees of endemism, collected at various locations in the Espinhaço Mountain Range in Minas Gerais State, south-eastern Brazil. The size and mass of the seeds, as well as the influence of light and temperature on their germination, were measured. Experiments were performed in germination chambers under constant temperatures of 10–40°C (intervals of 5°C), with a 12-h photoperiod, as well as in continuous darkness. All species studied had small seeds with mass varying from 0.06 to 1.21 mg. Most species required light for germination, displaying high germinability in the range of 15–40°C; some species, however, germinated in the absence of light at the highest temperatures (35 and 40°C). The sizes and masses of the seeds showed significant linear correlations, but light sensitivity was not related to these seed characteristics. The responses observed suggest that light requirement for germination, associated with the small sizes of Vellozia spp. seeds, contribute to the formation of persistent seed banks. The observed tolerance of these seeds to a wide range of germination temperatures is consistent with the large daily temperature fluctuations experienced in campos rupestres sites, although these seed characteristics cannot by themselves explain the high degree of endemism or the restricted distributions observed among the species examined.

The tadpole of the hylodid frog Hylodes charadranaetes Heyer and Cocroft, 1986

Zootaxa ◽  
2010 ◽  
Vol 2680 (1) ◽  
pp. 65
Author(s):  
PAULO NOGUEIRA COSTA ◽  
CARLA COSTA SIQUEIRA ◽  
DAVOR VRCIBRADIC ◽  
LUIZ NORBERTO WEBER ◽  
CARLOS FREDERICO D. ROCHA
Keyword(s):  
Rio Grande ◽  
Species Group ◽  
Minas Gerais ◽  
Riparian Forests ◽  
Atlantic Rainforest ◽  
Rio Grande Do Sul ◽  
Campos Rupestres ◽  
Eastern Brazil ◽  
Minas Gerais State ◽  
Species Groups

The genus Hylodes Fitzinger, 1826 is restricted to eastern Brazil, occurring from the states of Espírito Santo to Rio Grande do Sul (Lingnau et al. 2008, Frost 2010). Except for Hylodes otavioi, which inhabits riparian forests in rocky fields (“campos rupestres”) habitats within the Cerrado domain in Minas Gerais State (Sazima & Bokermann 1982), all other species in the genus are endemic to the Atlantic Rainforest domain (Lingnau et al. 2008). The genus currently comprises 24 species (Frost 2010) of small to medium-sized diurnal frogs that live associated to lotic streams in forests (e.g. Lingnau et al. 2008; Silva & Benmaman 2008). Heyer (1982) proposed four species groups for Hylodes, which are still recognized today (but see Haddad et al. 1996; Canedo & Pombal 2007): the glaber (formerly pulcher), lateristrigatus, mertensi, and nasus species groups. The Hylodes lateristrigatus species group is the most specious, being currently composed by 18 species: H. amnicola Pombal, Feio, and Haddad, 2002, H. babax Heyer, 1982, H. charadranaetes Heyer and Cocroft, 1986, H. fredi Canedo and Pombal, 2007, H. heyeri Haddad, Pombal, and Bastos, 1996, H. lateristrigatus (Baumann, 1912), H. magalhaesi (Bokermann, 1964), H. meridionalis (Mertens, 1927), H. ornatus (Bokermann, 1967), H. otavioi Sazima and Bokermann, 1983, H. perere Silva & Benmaman, 2008, H. perplicatus (Miranda-Ribeiro, 1926), H. pipilans Canedo and Pombal, 2007, H. phyllodes Heyer and Cocroft, 1986, H. regius Gouvêa, 1979, H. sazimai Haddad and Pombal, 1995, H. uai Nascimento, Pombal, and Haddad, 2001, and H. vanzolinii Heyer, 1982 (Silva & Benmaman 2008; Frost 2010).

RESPONSE OF PEAS TO ENVIRONMENT: IV. EFFECT OF FIVE SOIL WATER REGIMES ON GROWTH AND DEVELOPMENT OF PEAS

1968 ◽  
Vol 48 (2) ◽  
pp. 129-137 ◽  
Author(s):  
A. R. Maurer ◽  
H. F. Fletcher ◽  
D. P. Ormrod
Keyword(s):  
Water Stress ◽  
Soil Water ◽  
Growth And Development ◽  
Dry Matter ◽  
Fresh Weight ◽  
Water Regimes ◽  
Severe Water Stress ◽  
Water Conditions ◽  
Before And After ◽  
Soil Water Conditions

Pea plants growing in "weighing lysimeters" were subjected to five soil-water regimes to determine their response to varying conditions of soil water imposed at different stages of development. Plants subjected to a minimal water stress developed luxuriantly and continued to grow up to the harvest period. Pea yield and plant height were not reduced, but fresh weight and dry matter were less if irrigation was applied when soil water fell to 60% rather than 88% of that available. A severe water stress after blossom reduced pea yield, irrespective of soil-water conditions prior to blossom. Plants which had been given ample soil water before blossom wilted visibly when a severe stress was imposed in the post-blossom period, yet wilting did not occur in plants subjected to severe water stress both before and after blossom. Severe water stress prior to blossom did not cause a decrease in pea yield if ample soil moisture was made available after blossom.

Novelties in Begonia (Begoniaceae) from the campos rupestres of Serra do Padre Ângelo, Minas Gerais, Brazil: a new species and a new record

Phytotaxa ◽  
2021 ◽  
Vol 510 (1) ◽  
Author(s):  
LUDOVIC JEAN CHARLES KOLLMANN ◽  
PAULO MINATEL GONELLA
Keyword(s):  
New Species ◽  
High Elevation ◽  
Iucn Red List ◽  
Minas Gerais ◽  
Small Population ◽  
Critically Endangered ◽  
Campos Rupestres ◽  
Rock Outcrops ◽  
Critically Endangered Species ◽  
Minas Gerais State

Begonia piranga (Begoniaceae) is a new narrowly endemic species from the campos rupestres of Serra do Padre Ângelo, a quartzitic massif in Conselheiro Pena, eastern Minas Gerais state, Brazil. Description, diagnosis, taxonomic comments, detailed illustrations, field photographs, and a provisional IUCN Red List Assessment are provided. The new species is considered Critically Endangered due to its restricted occurrence in high elevation rock outcrops, small population size, and decline in the quality of the habitat. Begonia vasconcelosiana, another Critically Endangered species, is also newly reported here for Serra do Padre Ângelo. These discoveries add to the increasing list of novelties from Serra do Padre Ângelo, reinforcing the urge for conservation actions to protect the endemic flora of this Serra and other areas of campos rupestres in eastern Minas Gerais state.

The confused taxonomy of Pseudolaelia irwiniana (Orchidaceae) with two new synonyms

Phytotaxa ◽  
2021 ◽  
Vol 482 (3) ◽  
pp. 297-299
Author(s):  
CASSIO VAN DEN BERG ◽  
LUIZ MENINI NETO
Keyword(s):  
Rio De Janeiro ◽  
Minas Gerais ◽  
Campos Rupestres ◽  
Espírito Santo ◽  
New Synonyms ◽  
Eastern Brazil ◽  
Endemic Genera ◽  
Rocky Outcrops ◽  
Phylogenetic Affinities ◽  
Espirito Santo

Pseudolaelia Campos Porto & Brade (1935: 209) is a small orchid genus in subtribe Laeliinae. Its phylogenetic affinities place it near several small, endemic genera which constitute an isolated lineage in eastern Brazil, together with Adamantinia Van den Berg & Gonçalves (2004: 231), Constantia Barbosa Rodrigues (1877: 78), Isabelia Barbosa Rodrigues (1877: 75) and Leptotes Lindley (1833: t. 1625). All these genera have comparatively fewer species within the subtribe, and the main centre of distribution are the Brazilian Campos Rupestres, and other granitic rocky outcrops in the Brazilian States of Minas Gerais, Espírito Santo, Rio de Janeiro and Bahia. Also, several species in Pseudolaelia, Constantia and Leptotes are epiphytes on Vellozia sp., considered a very specialized type of epiphytism (van den Berg et al. 2006, Porembsky 2008).

Novelties from the Serra Nova State Park (Minas Gerais, Brazil): two new endemic species of Eriocaulaceae

Phytotaxa ◽  
2021 ◽  
Vol 505 (2) ◽  
pp. 187-200
Author(s):  
LIVIA ECHTERNACHT ◽  
MAURÍCIO TAKASHI COUTINHO WATANABE ◽  
CAROLINE OLIVEIRA ANDRINO
Keyword(s):  
Endemic Species ◽  
Iucn Red List ◽  
Minas Gerais ◽  
Red List ◽  
Campos Rupestres ◽  
Conservation Unit ◽  
Inflorescence Architecture ◽  
Espinhaço Range ◽  
Minas Gerais State ◽  
Iucn Red List Criteria

Two new micro-endemic species of Eriocaulaceae are described from the Campos Rupestres of Serra Nova State Park, a conservation unit located in the Espinhaço Range in northern Minas Gerais state, Brazil. Herein we provide descriptions, illustrations, photographs and maps, together with notes on morphology, distribution, phenology, taxonomy, and conservation. Paepalanthus ferrugineus is distinguished mainly by the reddish-brown involucral bracts, surpassing the floral disc, with the apex attenuate and tufted adaxially, tufted sepals and hairy petals. Syngonanthus polyaxis is easily differentiated by the inflorescence architecture with three morphologically distinct axial parts. Both species are considered Critically Endangered according to the IUCN Red List criteria.

scholarly journals Patterns of geographic distribution and conservation of the open-habitat avifauna of southeastern Brazilian mountaintops (campos rupestres and campos de altitude)

2010 ◽  
Vol 50 (1) ◽  
pp. 1-29 ◽  
Author(s):  
Marcelo Ferreira de Vasconcelos ◽  
Marcos Rodrigues
Keyword(s):  
Geographic Distribution ◽  
Bird Species ◽  
Southeastern Brazil ◽  
Vegetation Types ◽  
Campos Rupestres ◽  
Espinhaço Range ◽  
Serra Do Mar ◽  
Campos De Altitude ◽  
Open Habitat ◽  
Analysis And Synthesis

Montane open-habitats of southeastern Brazil are represented by the campos rupestres (principally in the Espinhaço Range) and by the campos de altitude (in the Serra do Mar and Serra da Mantiqueira). In spite of the occurrence of endemic species in both vegetation types, an analysis and synthesis of their bird communities have never been conducted. In this paper, we present an avifaunal survey of these areas, describe patterns of geographic distribution, and comment on the conservation of those open-habitats and their avifauna. A total of 231 bird species was recorded in the open-habitats of southeastern Brazilian mountaintops. In the campos rupestres, 205 species were recorded, while in the campos de altitude, the total was 123 species. Five patterns of distribution are recognizable among birds occurring in these habitats: non-endemic (191 species), Atlantic Forest endemics (26 species), Cerrado endemics (6 species), Caatinga endemic (1 species), and montane open-habitat endemics (7 species). In spite of the presence of several protected areas in those regions, the existing reserves do not guarantee the conservation of their important vegetation types and their avifaunas under current low levels of implementation. Since several endemic and threatened bird species live in the campos rupestres and campos de altitude, more efforts must be directed for their conservation.

scholarly journals Impacts of mining activities on the potential geographic distribution of eastern Brazil mountaintop endemic species

2017 ◽  
Vol 15 (3) ◽  
pp. 172-178 ◽  
Author(s):  
João Carlos de Castro Pena ◽  
Fernando Goulart ◽  
G. Wilson Fernandes ◽  
Diego Hoffmann ◽  
Felipe S.F. Leite ◽  
...  
Keyword(s):  
Geographic Distribution ◽  
Endemic Species ◽  
Mining Activities ◽  
Eastern Brazil ◽  
Potential Geographic Distribution
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