Beetle pollination of Philodendron solimoesense (Araceae) in French Guiana

1999 ◽  
Vol 160 (6) ◽  
pp. 1135-1143 ◽  
Author(s):  
Marc Gibernau ◽  
Denis Barabé ◽  
Philippe Cerdan ◽  
Alain Dejean
Keyword(s):  
French Guiana ◽  
Beetle Pollination

Pollination ecology of Philodendron squamiferum (Araceae)

2002 ◽  
Vol 80 (3) ◽  
pp. 316-320 ◽  
Author(s):  
Marc Gibernau ◽  
Denis Barabé
Keyword(s):  
Heat Production ◽  
French Guiana ◽  
Botanical Garden ◽  
Floral Traits ◽  
Temperature Pattern ◽  
Scarab Beetle ◽  
Beetle Pollination ◽  
Similar Temperature ◽  
Two Peaks ◽  
Two Temperature

In French Guiana, inflorescences of Philodendron squamiferum Poepp. (Araceae) were regularly visited by the scarab beetle Cyclocephala simulatrix Hölne and (Scarabaeidae, Coleoptera) occasionally by Cyclocephala tylifera Hölne. The flowering cycle lasted 2 days, and the protogynous inflorescence exhibited features typical of beetle pollination (floral chamber, food rewards, flower heating). The spadix temperature was measured during the entire flowering cycle in French Guiana and at the Montreal Botanical Garden. Both sets of measurements gave a similar temperature pattern. The spadix warmed up twice at the beginning of each evening with no notable heat production between the two peaks. These two temperature peaks were well synchronized with the arrival and departure of beetles.Key words: beetle pollination, Cyclocephala, Dynastidae, floral traits, thermogenesis, French Guiana.

Inside and outside the Neotropics: three Polish naturalists during the late nineteenth and early twentieth centuries

2017 ◽  
Vol 44 (1) ◽  
pp. 151-158 ◽  
Author(s):  
D. Mierzwa-Szymkowiak ◽  
A. S. H. Breure
Keyword(s):  
French Guiana ◽  
Large Collection ◽  
Late Nineteenth

Władysław Emanuel Lubomirski (1824–1882) was a Polish amateur naturalist who amassed a large collection of molluscs; this included specimens, partly collected by Konstanty Roman Jelski (1837–1896) and Jan Stanisław Sztolcman (Stolzmann) (1854–1928) in the Neotropics. Jelski travelled through French Guiana and Peru between 1865 and 1879. Sztolcman joined him in 1875 and worked in Peru and Ecuador until 1881.

scholarly journals Paramyxovirus circulation in bat species from French Guiana

2021 ◽  
Vol 90 ◽  
pp. 104769
Author(s):  
Edith Darcissac ◽  
Damien Donato ◽  
Benoît de Thoisy ◽  
Vincent Lacoste ◽  
Anne Lavergne
Keyword(s):  
French Guiana

scholarly journals First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 338
Author(s):  
Claire Michelet ◽  
Daniela Zeppilli ◽  
Cédric Hubas ◽  
Elisa Baldrighi ◽  
Philippe Cuny ◽  
...  
Keyword(s):  
South America ◽  
French Guiana ◽  
Ecological Status ◽  
Organic Enrichment ◽  
Strongly Correlated ◽  
Trophic Groups ◽  
Ecological State ◽  
Spatio Temporal ◽  
De Man ◽  
Main City

Bioindicators assess the mangroves ecological state according to the types of pressures but they differ with the ecosystem’s specificities. We investigated benthic meiofauna diversity and structure within the low human-impacted mangroves in French Guiana (South America) in response to sediment variables with various distances to the main city. Contaminant’s concentrations differed among the stations, but they remained below toxicity guidelines. Meiofauna structure (Foraminifera, Kinorhyncha, Nematoda) however varied accordingly. Nematode’s identification brought details on the sediment’s quality. The opportunistic genus Paraethmolaimus (Jensen, 1994) strongly correlated to the higher concentrations of Hg, Pb. Anoxic sediments were marked by organic enrichment in pesticides, PCB, and mangrove litter products and dominance of two tolerant genus, Terschellingia (de Man, 1888) and Spirinia (Gerlach, 1963). In each of these two stations, we found many Desmodora individuals (de Man, 1889) with the presence of epibionts highlighting the nematodes decreased fitness and defenses. Oxic sediments without contaminants were distinguished by the sensitive genera Pseudocella (Filipjev, 1927) and a higher diversity of trophic groups. Our results suggested a nematodes sensitivity to low contaminants concentrations. Further investigations at different spatio-temporal scales and levels of deterioration, would be necessary to use of this group as bioindicator of the mangroves’ ecological status.

scholarly journals Human Q Fever on the Guiana Shield and Brazil: Recent Findings and Remaining Questions

2021 ◽  
Author(s):  
Loïc Epelboin ◽  
Carole Eldin ◽  
Pauline Thill ◽  
Vincent Pommier de Santi ◽  
Philippe Abboud ◽  
...  
Keyword(s):  
South America ◽  
Geographical Distribution ◽  
Coxiella Burnetii ◽  
French Guiana ◽  
Q Fever ◽  
Guiana Shield ◽  
Animal Reservoir ◽  
The World ◽  
Unique Strain ◽  
Amazonian Region

Abstract Purpose of Review In this review, we report on the state of knowledge about human Q fever in Brazil and on the Guiana Shield, an Amazonian region located in northeastern South America. There is a contrast between French Guiana, where the incidence of this disease is the highest in the world, and other countries where this disease is practically non-existent. Recent Findings Recent findings are essentially in French Guiana where a unique strain MST17 has been identified; it is probably more virulent than those usually found with a particularly marked pulmonary tropism, a mysterious animal reservoir, a geographical distribution that raises questions. Summary Q fever is a bacterial zoonosis due to Coxiella burnetii that has been reported worldwide. On the Guiana Shield, a region mostly covered by Amazonian forest, which encompasses the Venezuelan State of Bolivar, Guyana, Suriname, French Guiana, and the Brazilian State of Amapá, the situation is very heterogeneous. While French Guiana is the region reporting the highest incidence of this disease in the world, with a single infecting clone (MST 117) and a unique epidemiological cycle, it has hardly ever been reported in other countries in the region. This absence of cases raises many questions and is probably due to massive under-diagnosis. Studies should estimate comprehensively the true burden of this disease in the region.

Sakakibarana, a new genus of Gyponini (Hemiptera: Cicadellidae: Iassinae) from the Amazon Rainforest

Zootaxa ◽  
2017 ◽  
Vol 4281 (1) ◽  
pp. 219 ◽  
Author(s):  
CLAYTON CORRÊA GONÇALVES ◽  
DANIELA MAEDA TAKIYA ◽  
GABRIEL MEJDALANI
Keyword(s):  
Type Species ◽  
French Guiana ◽  
New Genus ◽  
Morphological Features ◽  
Amazon Rainforest ◽  
Related Genus ◽  
Caudal Process ◽  
Northern Brazil

A new genus of Gyponini, Sakakibarana gen. nov., is proposed and its type species S. amazonica sp. nov. is described and illustrated based on specimens from the Amazon Rainforest of Northern Brazil (states of Amazonas and Pará) and French Guiana. The new genus can be distinguished from other members of the Gyponini by the following morphological features: robust body, short crown, crown and face transition distinct and subfoliaceous, pronotum strongly declivous, male pygofer with caudal process, and aedeagus with dorsal apodemes with a pair of processes. A discussion comparing the new genus with the related genus Tenuacia DeLong, 1977 is provided. 

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