scholarly journals Air temperatures in Central Amazonia. I - The daily record of air temperatures in a secondary forest near Manaus under cold front conditions (July 4 th, to July 13 th, 1969)()

1971 ◽  
Vol 1 (2) ◽  
pp. 51-56 ◽  
Author(s):  
W. L. P. Brinkmann ◽  
J. A. Weinman ◽  
M. N. Góes Ribeiro

Abstract A "friagem" is a cold front which moves northward from southern Brazil to the Caribbean coast of South America. A set of composite satellite pictures (2) of the American sector of the southern hemisphere as well as the recorded of daily temperatures in a secondary forest near Manaus are presented. The low temperatures and strong winds associated with this phenomenon have a profound effect on the environment of Amazonia.

1971 ◽  
Vol 1 (1) ◽  
pp. 75-76 ◽  
Author(s):  
W. L. Brinkmann ◽  
J. A. Weinman ◽  
M. N. Góes Ribeiro

Abstract A "friagem" is a cold front which moves northward from southern Brazil to the Caribean coast of South America. A set of composite satellite pictures (2) of the American sector of the southern hemisphere as well as the record of daily temperatures in a secondary forest near Manaus are presented. The low temperatures and strong winds associated with this phenomenon have a profound effect on the environment of Amazonia.


1972 ◽  
Vol 2 (3) ◽  
pp. 25-29 ◽  
Author(s):  
W. L. F. Brinkmann ◽  
M. N. Góes Ribeiro

Abstract Air temperatures under cold front conditions were recorded on July 10th 1969 inside and outside a secondary forest at Ducke Forest Reserve Air temperatures were measured at 2 towers and 8 corresponding levels ranging from 10 cm to 900 cm height. The absolute daily minimum air temperature recorded was 11.0°C, which is exceptionally low for Central Amazonia and 16.0°C below the yearly average air temperature at Manaus measured over a 45-year period of temperature records. The maximum 30-min range of air temperature was observed in the clearing (8.1°C), 7 meters above the ground. The strongest impact of air temperatures in the forest stand was recorded in the canopy area and in the ground stratum due to the formation of cold air cells and cold air sinks. The temperature profiles inside and outside the secondary forest at Ducke Forest Preserve during cold front conditions did not conform with the established temperature patterns in a tropical environment.


2014 ◽  
Vol 41 (1) ◽  
pp. 113-123 ◽  
Author(s):  
Gary M. Fellers

Rollo Howard Beck (1870–1950) was a professional bird collector who spent most of his career on expeditions to the Channel Islands off southern California, the Galápagos Islands, South America, the South Pacific, and the Caribbean. Some of the expeditions lasted as long as ten years during which time he and his wife, Ida, were often working in primitive conditions on sailing vessels or camps set up on shore. Throughout these expeditions, Beck collected specimens for the California Academy of Sciences, the Museum of Vertebrate Zoology at Berkeley (California), the American Museum of Natural History, and the Walter Rothschild Museum at Tring, England. Beck was one of the premier collectors of his time and his contributions were recognized by having 17 taxa named becki in his honor. Of these taxa, Beck collected 15 of the type specimens.


1979 ◽  
Vol 57 (9) ◽  
pp. 997-999 ◽  
Author(s):  
R. J. Reader

In laboratory freezing trials, cold hardiness of six types of bog ericad flowers differed significantly (i.e., Chamaedaphne calyculata > Andromeda glaucophylla > Kalmia polifolia > Vaccinium myrtilloides > Ledum groenlandicum > Vaccinium macrocarpon) at air temperatures between −4 and −10 °C but not at temperatures above −2 °C. At the Luther Marsh bog in southern Ontario, low temperatures (−3 to −7 °C) would select against May flowering by the least cold hardy ericads. Availability of pollinators, on the other hand, would encourage May flowering by the most cold hardy species. Presumably, competition for insect pollinators has promoted the diversification of bog ericad flowering peaks, while air temperature, in conjunction with flower cold hardiness, determined the order in which flowering peaks were reached.


Author(s):  
Gail L. Christeson ◽  
Paul Mann ◽  
Alejandro Escalona ◽  
Trevor J. Aitken

Phytotaxa ◽  
2021 ◽  
Vol 486 (1) ◽  
pp. 1-105
Author(s):  
LAURA C. DE LANNOY ◽  
AYRTON I. DE OLIVEIRA ◽  
RENATO GOLDENBERG ◽  
DUANE F. LIMA

Myrtaceae is one of the largest families in number of species within the order Myrtales and one of the richest families in Brazil. Myrcia is the fourth largest genus of Myrtaceae, with approximately 770 species distributed from Central America and the Caribbean to southern South America. In Brazil Myrcia is represented by 397 species, of which 309 are endemic. In this study, we present the taxonomic treatment for all species of Myrcia that occur in Paraná state, Brazil. Analyses of herbarium specimens, online databases, and bibliography were performed. Fifty-three species of Myrcia occur in Paraná, distributed in all vegetation types. Twenty-three names were excluded from previous lists of species or listed as doubtful species. Neither of the recorded species is endemic to Paraná, but this state is the southern and northern limit of distribution of six and two species, respectively. We present an identification key, taxonomic descriptions, figures, maps, and comments on phenology, habitat, and morphology for each species.


2021 ◽  
Vol 65 (04) ◽  
pp. 137-139
Author(s):  
Mehdi Elman oğlu Bağırov ◽  

The distribution of the world's hotel chains to more and more countries is also reflected in our country, and the development of this type of chain hotels is growing day by day. Along with the development of technology, the tourism infrastructure and its key element, the hotel industry, is also developing. Today, investments are being made in a planned way to modernize the hotel business, build new hotels, and introduce new technologies and forms of service. Sheraton Hotels and Resorts is an international hotel chain owned by Marriott International. Sheraton has 446 hotels with 155,617 rooms worldwide, including locations in North America, Africa, Asia, Central and South America, Europe, the Middle East and the Caribbean. Key words: hotel chains, investment, technology, hotel business, tourism infrastructure


Sign in / Sign up

Export Citation Format

Share Document