Linking speleothem and soil magnetism in the Pau d'Alho cave (central South America)

2016 ◽  
Vol 121 (10) ◽  
pp. 7024-7039 ◽  
Author(s):  
Plinio Jaqueto ◽  
Ricardo I. F. Trindade ◽  
Gelvam A. Hartmann ◽  
Valdir F. Novello ◽  
Francisco W. Cruz ◽  
...  
Keyword(s):  
South America ◽  
Central South ◽  
Soil Magnetism

The heat wave of October 2020 in central South America

2021 ◽  
Author(s):  
Jose A. Marengo ◽  
Tercio Ambrizzi ◽  
Naurinete Barreto ◽  
Ana Paula Cunha ◽  
Andrea M. Ramos ◽  
...  
Keyword(s):  
South America ◽  
Heat Wave ◽  
Central South

scholarly journals Foraging behavior and diet of the vulnerable Cinereous Warbling-finch Poospiza cinerea (Aves, Emberizidae)

2014 ◽  
Vol 74 (4) ◽  
pp. 821-827 ◽  
Author(s):  
U Wischhoff ◽  
F Marques-Santos ◽  
M Rodrigues
Keyword(s):  
South America ◽  
Foraging Behavior ◽  
Rare Species ◽  
Feeding Habits ◽  
Reproductive Organs ◽  
Substrate Use ◽  
Food Items ◽  
Niche Specialization ◽  
Study Sites ◽  
Central South

The Cinereous Warbling-finch Poospiza cinerea is a globally vulnerable Emberizidae passerine, patchily distributed and rare in the open savannah of central South America. Attributes of rare species include niche specificity such as feeding habits. To verify possible niche specialization in this species we aimed to describe its foraging habits related to substrate use, foraging and substrate height, attack maneuvers, and consumed food items. We monitored two groups at two study sites and sampled foraging events with intervals of 15 minutes. The substrates used in greater frequency were foliage and reproductive organs. Foraging and substrate height varied widely with study area. The attack maneuver adopted in greater frequency was glean. Most food items attacked were small invertebrates. Big invertebrates included Lepidoptera, Hemiptera, Coleoptera, Hymenoptera and Orthoptera. Poospiza cinerea was also recorded foraging in mixed bird flocks with seven other species. The generalist foraging behavior of the species cannot be associate to its rarity.

Hydrocarbon-Bearing Late Paleozoic Glaciated Basins of Southern and Central South America

1995 ◽  
Author(s):  
N. Eyles ◽  
A. B. França ◽  
G. Gonzalez Bonorino ◽  
C. H. Eyles ◽  
O. López Paulsen
Keyword(s):  
South America ◽  
Late Paleozoic ◽  
Central South

scholarly journals A Cryptic New Species of Flycatcher (Tyrannidae: Suiriri) From the Cerrado Region of Central South America

The Auk ◽  
2001 ◽  
Vol 118 (1) ◽  
pp. 56-78 ◽  
Author(s):  
Kevin J. Zimmer ◽  
Andrew Whittaker ◽  
David C. Oren
Keyword(s):  
New Species ◽  
Natural History ◽  
South America ◽  
Color Pattern ◽  
Playback Experiments ◽  
History Of ◽  
Central South ◽  
A New Species

AbstractA new species of tyrant flycatcher (Suiriri islerorum) is described from the cerrado region of Brazil and adjacent eastern Bolivia. The species previously had been confused with Suiriri suiriri affinis, with which it is syntopic at multiple sites. The new species was first identified by voice. Although cryptically similar to S. s. affinis in many respects, the new species is readily identified by all vocalizations, bill size, color pattern of the tail, and shape of the central rectrices. Most distinctive are the male–female duets, which are accompanied by dramatic wing-lifting displays not performed by any congeners. Reciprocal playback experiments of tape-recorded vocalizations demonstrated that the new species and S. s. affinis do not respond to one another's vocalizations. We provide information on the natural history of the new flycatcher, along with spectrograms of its various vocalizations. We also provide vocal analysis of all other named taxa in Suiriri, and discuss the various intrageneric relationships. In particular, S. s. affinis and S. s. bahiae, although distinct morphologically, are vocally and behaviorally similar, and respond to one another's vocalizations in playback experiments.

The summer foraging ranges of adult spectacled petrels Procellaria conspicillata

2013 ◽  
Vol 26 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Tim A. Reid ◽  
Robert A. Ronconi ◽  
Richard J. Cuthbert ◽  
Peter G. Ryan
Keyword(s):  
South America ◽  
South Atlantic ◽  
Breeding Birds ◽  
Shelf Break ◽  
Fishing Activity ◽  
Breeding Grounds ◽  
Satellite Transmitters ◽  
Longline Fisheries ◽  
Central South ◽  
Foraging Ranges

AbstractSatellite transmitters were attached to eight adult spectacled petrels Procellaria conspicillata Gould captured during the early incubation period at their breeding grounds on Inaccessible Island, one of the Tristan da Cunha Islands in the central South Atlantic Ocean. Data on their at-sea distribution was obtained for up to six months. All birds remained within the South Atlantic from 24–44°S, with most between 25 and 40°S. Breeding birds mainly foraged in oceanic waters, but failed breeders or non-breeders concentrated their foraging activity over the Rio Grande Rise and the Walvis Ridge and along the shelf break off the east coast of South America. Little foraging occurred along the Benguela shelf break off southern Africa. Non-breeders favoured relatively warm water with low chlorophyll concentrations, reducing the risk of bycatch in fisheries. Tracked birds spent 16% of their time in areas with high levels of tuna longline fishing activity, with overlap greater for non-breeding birds (22%) than breeding birds (3%). Birds in this study foraged in shallower waters along the continental shelf edge off South America than spectacled petrels tracked in this area in winter, potentially increasing their risk of exposure to demersal longline fisheries in this area in summer.

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