Groundwater nitrogen dynamics at the terrestrial-lotic interface of a small catchment in the Central Amazon basin

1994 ◽  
Vol 27 (2) ◽  
Author(s):  
MichaelE. McClain ◽  
JeffreyE. Richey ◽  
TaniaPen Pimentel
Keyword(s):  
Amazon Basin ◽  
Nitrogen Dynamics ◽  
Small Catchment ◽  
Central Amazon ◽  
Groundwater Nitrogen

LBA-ECO LC-07 MONTHLY MEAN FLOODED WETLANDS HABITAT, CENTRAL AMAZON BASIN: 1979-1996

2011 ◽  
Author(s):  
B.R. FORSBERG, ◽  
M. GASTIL, ◽  
S.K. HAMILTON, ◽  
L.L. HESS, ◽  
I.B.T. LIMA, ◽  
...  
Keyword(s):  
Amazon Basin ◽  
Central Amazon

scholarly journals Effects of light and temperature on isoprene emission at different leaf developmental stages of eschweilera coriacea in central Amazon

2014 ◽  
Vol 44 (1) ◽  
pp. 9-18 ◽  
Author(s):  
Eliane Gomes Alves ◽  
Peter Harley ◽  
José Francisco de C. Gonçalves ◽  
Carlos Eduardo da Silva Moura ◽  
Kolby Jardine
Keyword(s):  
Amazon Basin ◽  
Developmental Stages ◽  
Incident Light ◽  
Leaf Temperature ◽  
Mature Leaf ◽  
Senescent Leaf ◽  
Central Amazon ◽  
Isoprene Emission ◽  
Emission Models ◽  
Volatile Organic Compound Emissions

Isoprene emission from plants accounts for about one third of annual global volatile organic compound emissions. The largest source of isoprene for the global atmosphere is the Amazon Basin. This study aimed to identify and quantify the isoprene emission and photosynthesis at different levels of light intensity and leaf temperature, in three phenological phases (young mature leaf, old mature leaf and senescent leaf) of Eschweilera coriacea (Matamatá verdadeira), the species with the widest distribution in the central Amazon. In situ photosynthesis and isoprene emission measurements showed that young mature leaf had the highest rates at all light intensities and leaf temperatures. Additionally, it was observed that isoprene emission capacity (Es) changed considerably over different leaf ages. This suggests that aging leads to a reduction of both leaf photosynthetic activity and isoprene production and emission. The algorithm of Guenther et al. (1999) provided good fits to the data when incident light was varied, however differences among E S of all leaf ages influenced on quantic yield predicted by model. When leaf temperature was varied, algorithm prediction was not satisfactory for temperature higher than ~40 °C; this could be because our data did not show isoprene temperature optimum up to 45 °C. Our results are consistent with the hypothesis of the isoprene functional role in protecting plants from high temperatures and highlight the need to include leaf phenology effects in isoprene emission models.

Two new endemic species of Caraipa (Calophyllaceae) from the Central Amazon Basin, Amazonas State, Brazil

Phytotaxa ◽  
2017 ◽  
Vol 311 (1) ◽  
pp. 77
Author(s):  
FERNANDA NUNES CABRAL ◽  
VOLKER BITTRICH ◽  
MARIA DO CARMO ESTANISLAU DO AMARAL
Keyword(s):  
New Species ◽  
Endemic Species ◽  
Amazon Basin ◽  
Leaf Lamina ◽  
Small Tree ◽  
Central Amazon ◽  
White Sand ◽  
Two New Species ◽  
Amazonas State ◽  
Fruit Surface

Two new species of Caraipa (Calophyllaceae) are described and illustrated: Caraipa glabra and C. iracemensis. Both species are known only from the municipality of Presidente Figueiredo, Amazonas state, Brazil. They both occur on patches of white-sand vegetation and they are locally abundant. Caraipa glabra is a small tree and can be distinguished from other Caraipa species by the complete absence of hairs on the leaf lamina, pedicel and fruits. Caraipa iracemensis is morphologically similar to C. grandifolia and C. caespitosa, and can be distinguished by its habit, leaves and petiole size, as well as fruit surface and size.

scholarly journals Record of Cenozoic weathering episodes in central Amazon basin

2021 ◽  
Author(s):  
Claire Ansart ◽  
Cécile Gautheron ◽  
Djamila Demri ◽  
Thierry Allard ◽  
Damien Calmels ◽  
...  
Keyword(s):  
Amazon Basin ◽  
Central Amazon

Dissolved organic matter and terrestrial-lotic linkages in the Central Amazon Basin of Brazil

1997 ◽  
Vol 11 (3) ◽  
pp. 295-311 ◽  
Author(s):  
Michael E. McClain ◽  
Jeffrey E. Richey ◽  
Jay A. Brandes ◽  
Tania P. Pimentel
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Amazon Basin ◽  
Central Amazon

Low-level nocturnal wind maximum over the central Amazon basin

1992 ◽  
Vol 58 (1-2) ◽  
pp. 91-115 ◽  
Author(s):  
Steven Greco ◽  
Stanley Ulanski ◽  
Michael Garstang ◽  
Samuel Houston
Keyword(s):  
Amazon Basin ◽  
Wind Maximum ◽  
Central Amazon ◽  
Low Level

Two new Hyphessobrycon (Characiformes: Characidae) species from Central Amazon basin, Brazil

Zootaxa ◽  
2017 ◽  
Vol 4318 (1) ◽  
pp. 123 ◽  
Author(s):  
CRISTIANO R. MOREIRA ◽  
FLÁVIO C.T. LIMA
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
The Body ◽  
Dark Band ◽  
Caudal Peduncle ◽  
Anterior Portion ◽  
Central Amazon ◽  
Two New Species

Two new species of Hyphessobrycon, H. ericae and H. wosiackii, are described from the Amazon basin, Brazil. Both new species are distinguished from congeners by the coloration, composed by one humeral blotch merging with an anterior dark band restricted to the anterior portion of the body and the presence of a caudal peduncle blotch. Hyphessobrycon ericae is distinguished from H. wosiackii by presenting a humeral spot vertically elongated, with an overall appearance of an arrow, instead of an anteriorly rounded humeral spot. 

scholarly journals A floristic survey of angiosperm species occurring at three landscapes of the Central Amazon várzea, Brazil

Check List ◽  
2015 ◽  
Vol 11 (6) ◽  
pp. 1789 ◽  
Author(s):  
Bruno Garcia Luize ◽  
Eduardo Martins Venticinque ◽  
Thiago Sanna Freire Silva ◽  
Evlyn Marcia Leão de Moraes Novo
Keyword(s):  
Amazon Basin ◽  
Forest Degradation ◽  
Floodplain Forests ◽  
Human Occupation ◽  
Floristic Survey ◽  
Central Amazon ◽  
Botanical Knowledge ◽  
Degradation Rates ◽  
Floods And Droughts ◽  
Angiosperm Species

The Amazonian floodplains harbor highly diverse wetland forests, with angiosperms adapted to survive extreme floods and droughts. About 14% of the Amazon Basin is covered by floodplains, which are fundamental to river productivity, biogeochemical cycling and trophic flow, and have been subject to human occupation since Pre-Colombian times. The botanical knowledge about these forests is still incomplete, and current forest degradation rates are much higher than the rate of new botanical surveys. Herein we report the results of three years of botanical surveys in floodplain forests of the Central Amazon. This checklist contains 432 tree species comprising 193 genera and 57 families. The most represented families are Fabaceae, Myrtaceae, Lauraceae, Sapotaceae, Annonaceae, and Moraceae representing 53% of the identified species. This checklist also documents the occurrence of approximately 236 species that have been rarely recorded as occurring in white-water floodplain forests.

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