scholarly journals Sporophytic apomixis in polyploidAnemopaegmaspecies (Bignoniaceae) from central Brazil

2013 ◽  
Vol 173 (1) ◽  
pp. 77-91 ◽  
Author(s):  
Diana Salles Sampaio ◽  
Nelson Sabino Bittencourt Júnior ◽  
Paulo Eugênio Oliveira
Keyword(s):  
Central Brazil ◽  
Sporophytic Apomixis

Frontier and Western History in Central Brazil

2019 ◽  
Vol 9 (1) ◽  
pp. 211-214
Author(s):  
Donald Worster
Keyword(s):  
Rio De Janeiro ◽  
Western History ◽  
Central Brazil

Frontier and Western History in Central Brazil Dutra e Silva, S. No Oeste, a terra e o céu: a expansão da fronteira agrícola no Brasil Central (Rio de Janeiro: Mauad X, 2017)

Turnera fasciculifolia (Turneraceae, Passifloraceae s. l.): A New Species From the Jalapão Region, Tocantins, Brazil

2020 ◽  
Vol 45 (4) ◽  
pp. 833-838
Author(s):  
Lamarck Rocha ◽  
Patrícia Luz Ribeiro ◽  
Maria Mercedes Arbo
Keyword(s):  
New Species ◽  
Protected Area ◽  
Extrafloral Nectaries ◽  
Distribution Map ◽  
Central Brazil ◽  
Axillary Branches ◽  
Revolute Margin ◽  
A New Species

Abstract—We present a new species, Turnera fasciculifolia, from the Jalapão region, the largest continuous protected area of Cerrado in Tocantins State, in central Brazil. The new species belongs to Turnera series Leiocarpae, and it can be recognized by the linear ericoid leaves with revolute margin, generally without extrafloral nectaries, and the basal leaves of the young axillary branches gathered in fascicles. We provide a description, illustrations, a distribution map, and a comparison with T. genistoides and T. revoluta, which also have ericoid leaves.

THE NEOPROTEROZOIC OXYGENATION EVENT AND BAMBUI GROUP, CENTRAL BRAZIL

2020 ◽  
Author(s):  
Leandro G. DaSilva ◽  
◽  
Peir Pufahl ◽  
Peir Pufahl ◽  
Noel P. James ◽  
...  
Keyword(s):  
Central Brazil

scholarly journals Dry and Wet Climate Periods over Eastern South America: Identification and Characterization through the SPEI Index

Atmosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 155
Author(s):  
Anita Drumond ◽  
Milica Stojanovic ◽  
Raquel Nieto ◽  
Luis Gimeno ◽  
Margarida L. R. Liberato ◽  
...  
Keyword(s):  
South America ◽  
Potential Evapotranspiration ◽  
Monthly Precipitation ◽  
Economic Activities ◽  
Central Brazil ◽  
Moisture Analysis ◽  
Dry Conditions ◽  
Wet Climate ◽  
Climate Events

A large part of the population and the economic activities of South America are located in eastern regions of the continent, where extreme climate events are a recurrent phenomenon. This study identifies and characterizes the dry and wet climate periods at domain-scale occurring over the eastern South America (ESA) during 1980–2018 through the multi-scalar Standardized Precipitation–Evapotranspiration Index (SPEI). For this study, the spatial extent of ESA was defined according to a Lagrangian approach for moisture analysis. It consists of the major continental sink of the moisture transported from the South Atlantic Ocean throughout the year, comprising the Amazonia, central Brazil, and the southeastern continental areas. The SPEI for 1, 3, 6, and 12 months of accumulation was calculated using monthly precipitation and potential evapotranspiration time series averaged on ESA. The analysis of the climate periods followed two different approaches: classification of the monthly SPEI values as mild, moderate, severe, and extreme; the computation of the events and their respective parameters (duration, severity, intensity, and peak). The results indicate that wet periods prevailed in the 1990s and 2000s, while dry conditions predominated in the 2010s, when the longest and more severe dry events have been identified at the four scales.

Two new species and taxonomic notes on the Neotropical spiny orb-weaving spi-ders Micrathena and Chaetacis (Araneae: Araneidae), with remarks on the development of Micrathena excavata IVAN L. F. MAGALHÃES & ADALBERTO J. SANTOS (Brazil)

Zootaxa ◽  
2011 ◽  
Vol 2983 (1) ◽  
pp. 39 ◽  
Author(s):  
IVAN L. F. MAGALHÃES ◽  
ADALBERTO J. SANTOS
Keyword(s):  
New Species ◽  
Junior Synonym ◽  
Adult Males ◽  
Development Stages ◽  
Brazilian Amazonia ◽  
Central Brazil ◽  
Adult Females ◽  
Two New Species ◽  
Senior Synonym ◽  
First Time

In this paper, M. yanomami n. sp., from Brazilian Amazonia, Chaetacis bandeirante n. sp., from Central Brazil, and the males of M. gaujoni Simon, 1897 and M. ruschii (Mello-Leitão, 1945) n. comb. , respectively from Ecuador and Brazil, are described and illustrated for the first time. An ontogenetic series of the last development stages of both sexes of Micrathena excavata (C. L. Koch, 1836) is illustrated and briefly described. Adult females are larger and have longer legs and larger abdomens than adult males. Probably females undergo at least one additional moult before adulthood, compared to males. Micrathena ornata Mello-Leitão, 1932 is considered a junior synonym of M. plana (C. L. Koch, 1836), and M. mastonota Mello-Leitão 1940 is synonymized with M. horrida (Taczanowski, 1873). Acrosoma ruschii Mello-Leitão, 1945 is revalidated, transferred to Micrathena and considered a senior synonym of M. cicuta Gonzaga & Santos, 2004. Chaetacis necopinata (Chickering, 1960) is recorded for Brazil for the first time. Chaetacis incisa (Walckenaer, 1841) is considered a nomen dubium.

Evidence for direct water absorption by the shoot of the desiccation-tolerant plant Vellozia flavicans in the savannas of central Brazil

2005 ◽  
Vol 21 (5) ◽  
pp. 585-588 ◽  
Author(s):  
Rafael S. Oliveira ◽  
Todd E. Dawson ◽  
Stephen S. O. Burgess
Keyword(s):  
Water Absorption ◽  
Moisture Absorption ◽  
Terrestrial Plants ◽  
Desert Ecosystems ◽  
Common View ◽  
Central Brazil ◽  
Tolerant Plants ◽  
Aerial Roots ◽  
Alternative Water ◽  
Specialized Structure

Our common view on water uptake by terrestrial plants is that it occurs via absorption by roots from the soil substrate. However, it has long been known that plants exhibit alternative water-absorption strategies, particularly in drought-prone environments. Examples include many tropical epiphytic orchids which use a specialized structure called velamen radicum around their aerial roots for moisture absorption directly from the air (Capesius & Barthlott 1975), specialized trichomes in bromeliads (Andrade 2003, Benzing 1990), uptake by hydathodes into leaves of species inhabiting dry desert ecosystems of Namibia (Martin & von Willert 2000) and foliar absorption by coastal California redwoods during the summer fog season (Burgess & Dawson 2004). One of the most intriguing and yet, least-studied examples of adaptations to severe water limitation is found with desiccation-tolerant plants (also called resurrection plants). During drought periods, the water content of these plants can equilibrate with the low relative humidity of the air to the point that the plants appear dead. However, when water is supplied, these plants fully rehydrate (Alpert 2000, Bewley & Krochko 1982) and become physiologically active. Desiccation-tolerant vascular plants are rare in most ecosystems but diverse in tropical inselbergs (granitic outcrops; Porembski & Barthlott 2000). Relatively little is known about inselberg species particularly from an ecophysiological perspective (see Lüttge 1997 and Klüge & Brulfert 2000 for reviews).

A New Species of Philodendron (Araceae) from Central Brazil

Kew Bulletin ◽  
1997 ◽  
Vol 52 (2) ◽  
pp. 499 ◽  
Author(s):  
Eduardo G. Goncalves
Keyword(s):  
New Species ◽  
Central Brazil ◽  
A New Species
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