U–Pb geochronology of detrital zircons from San Carlos Basin, Costa Rica: Evidence of Miocene volcanism and implications for the Precambrian and Paleozoic history of the Central American isthmus

2021 ◽  
Vol 110 ◽  
pp. 103311
Author(s):  
Martín Rojas-Barrantes ◽  
Sofia Huapaya-Rodriguez Parra ◽  
Luigi A. Solari ◽  
Vladimír Žáček
Keyword(s):  
Costa Rica ◽  
Detrital Zircons ◽  
Central American ◽  
History Of ◽  
San Carlos ◽  
Central American Isthmus

scholarly journals Relative abundance and activity patterns of terrestrial mammals in Pacuare Nature Reserve, Costa Rica

2017 ◽  
Vol 9 (1) ◽  
pp. 15-21
Author(s):  
Stephanny Arroyo-Arce ◽  
Ian Thomson ◽  
Carlos Fernandez ◽  
Roberto Salom-Perez
Keyword(s):  
Costa Rica ◽  
Nature Reserve ◽  
Mammalian Species ◽  
Activity Patterns ◽  
Abundant Species ◽  
Camera Trap ◽  
Central American ◽  
Leopardus Pardalis ◽  
Terrestrial Mammals ◽  
History Of

Located in Costa Rica, Pacuare Nature Reserve has a long established history of wildlife monitoring programs primarily focused on species of nesting marine turtles and the Agami herons (Agamia agami) found within the reserve. Our research represents the first as­sessment on the local terrestrial mammal populations. Data was col­lected by using seven camera trap stations distributed within the boundaries of the reserve. From April 2015 to March 2016, and after a total of 1 643 camera trap nights, we were able to identify 11 terres­trial mammalian species distributed in six orders and nine families. The most abundant species was the common opossum (Didelphis marsu­pialis), followed by the ocelot (Leopardus pardalis). A noticeably ab­sent species, otherwise common throughout the area, was the Central American agouti (Dasyprocta punctata). Our results are similar to those from other protected areas in the Northeastern Caribbean coast of Costa Rica.

scholarly journals Graphic correlation of deep sea and shallow marine deposits from the Central American Isthmus region: implications for Late Neogene paleoclimatology

1992 ◽  
Vol 6 ◽  
pp. 88-88
Author(s):  
Harry J. Dowsett
Keyword(s):  
Costa Rica ◽  
High Resolution ◽  
Ocean Circulation ◽  
Deep Sea ◽  
Sea Surface ◽  
Central American ◽  
Major Barrier ◽  
Late Neogene ◽  
The Caribbean ◽  
Central American Isthmus

The stratigraphic record in Panama and Costa Rica preserves the biologic and climatic changes associated with the formation of a major barrier to marine migration and ocean circulation. Creating a high resolution temporal framework within which stratigraphic sections found on the Isthmus can be interpreted is fundamental to our understanding the history and importance of these units.The Isthmus contains rich marine macro- and microfaunas and floras on both the Pacific and Atlantic margins. Planktic foraminifers and calcareous nannofossils are common and often well preserved. Preliminary analysis of these fossils reveals a rich sedimentary record spanning the Late Miocene to Pleistocene. Multivariate statistical analyses of these assemblages provide environmental estimates. Unfortunately, traditional methods of biostratigraphy are limited in their ability to create a high resolution temporal framework for the region. For example, a majority of deposits analyzed can be placed in planktic foraminiferal zone N19 (early Pliocene). In order to answer paleobiologic and paleoclimatic questions one requires more precise correlations between sections and some indication of duration of sedimentation represented by various sections.In an attempt to overcome the shortcomings of traditional biostratigraphic methods, the Graphic Correlation method has been applied to selected sequences on the Central American Isthmus. Graphic correlation (GC) is a procedure by which two sequences can be compared and correlated using a wide variety of stratigraphic information simultaneously. A GC model of late Neogene planktic foraminifer, calcareous nannofossil, and paleomagnetic reversal events has been produced through compositing of more than 26 deep sea cores and ocean margin sequences. Following routine GC procedures the positions of all fossil first and last occurrences from a number of sections on the Caribbean and Pacific sides of the Central American Isthmus (Panama and Costa Rica) have been recorded. These sections have been correlated to the GC model and hence, to each other, providing a temporal framework for the Isthmus units.Selected sections were then correlated to other sequences such as near-by deep sea cores which have been analyzed for sea surface temperature and salinity to gain a better understanding of the overall paleoceanographic development of the region between 5 and 2 Ma. For example, correlation of units on the Caribbean side of the Isthmus with DSDP Site 502 indicates little to no change in sea surface temperatures during the entire time the Isthmus was reaching closure. Mid-to-high latitude sites exhibit amplification of warming with increasing latitude. The shoaling Isthmus, while having negligible effects on tropical marine temperatures, was responsible for increased meridional heat transport which resulted in a North Atlantic warming about 3 Ma. A general model for paleoceanographic changes during the time of closure will be discussed.

scholarly journals Notes on the Life Cycle and Natural History of Dismorphia Virgo (Lepidoptera Pieridae: Dismorphiinae) in Costa Rica

1972 ◽  
Vol 79 (3) ◽  
pp. 165-178 ◽  
Author(s):  
Allen M. Young
Keyword(s):  
Life Cycle ◽  
Costa Rica ◽  
Natural History ◽  
Taxonomic Status ◽  
Central American ◽  
South American ◽  
Species Status ◽  
New Information ◽  
History Of ◽  
The Common

This paper summarizes the life cycle and some aspects of natural history of the tropical pierid, Dismorphia virgo (Dismorphiinae) in Costa Rica. The precise taxonomic status of the butterfly in Central America has not been established, and it may represent a variable northern isolate of the common South American D. critomedia. Therefore, independent of whether the Central American form discussed in this paper has achieved full species status as the more northern virgo or is a subspecies or variety of critomedia evolving towards species status, this paper provides new information on the biology of the butterfly in Costa Rica. The establishment of precise taxonomic position awaits further study, and for the present purpose, I refer to the butterfly as D. virgo.

Plagiothecium lucidum (Hook. f. & Wils.) Paris in tropical Africa

2000 ◽  
Vol 18 (1) ◽  
pp. 147-152 ◽  
Author(s):  
Ryszard Ochyra ◽  
Rafa Kempa ◽  
William R. Buck
Keyword(s):  
Costa Rica ◽  
Central America ◽  
Central American ◽  
Type Material ◽  
Distribution Map ◽  
Tropical Africa ◽  
African Plants ◽  
World Distribution ◽  
Central American Isthmus

Plagiothecium lucidum (Hook. f. & Wils.) Paris is confirmed as a new addition to the bryoflora of tropical Africa on the basis of two collections from the Bale Mountains in Ethiopia. The type material of Isopterygium integrifolium Bartr. from Costa Rica in Central America is evaluated and this species is considered to be conspecific with P. lucidum. As a result of this taxonomic conclusion the range of this species is extended to Costa Rica and this is the first recognition of this species in the Central American isthmus. A world distribution map for this species is presented and some details of African plants and the type of I. integrifolium are illustrated.

Costa Rica and the 1920-1921 Union Movement: A Reassessment

1977 ◽  
Vol 19 (3) ◽  
pp. 393-418
Author(s):  
Richard V. Salisbury
Keyword(s):  
Twentieth Century ◽  
Costa Rica ◽  
Central America ◽  
Central American ◽  
Major Theme ◽  
American Federation ◽  
Union Movement ◽  
History Of ◽  
Entire History ◽  
The Ideal

Carlos Pereyra (as quoted in Herrarte, 1955: 187) has written that “the entire history of Central America has been a struggle between union and separatism.” While this may be somewhat overstated, it is undeniable that the unionist-separatist syndrome has provided a major theme for nineteenth- and twentieth-century isthmian interrelationships. Indeed, from the collapse of the original Central American Federation in 1838 to the recent failure of the Central American Common Market, isthmian leaders have made numerous attempts to achieve some form of Central American integration. At times the threat of a forceful imposition of union, posed by such men as Guatemala's Justo Rufino Barrios and Nicaragua's José Santos Zelaya, tended to discredit the unionist cause. Central American unionists, however, have been, if anything, resilient, and, despite temporary setbacks, the ideal of union has remained a constant in isthmian affairs.

Occurrence and biogeographic significance of Heliaster (Echinodermata: Asteroidea) from the Pliocene of southwest Florida

1988 ◽  
Vol 62 (01) ◽  
pp. 126-132 ◽  
Author(s):  
Douglas S. Jones ◽  
Roger W. Portell
Keyword(s):  
Central American ◽  
Eastern Pacific ◽  
Whole Body ◽  
Marine Fauna ◽  
Western Atlantic ◽  
Southwest Florida ◽  
Extant Species ◽  
Geologic Record ◽  
Central American Isthmus

Whole body asteroid fossils are rare in the geologic record and previously unreported from the Cenozoic of Florida. However, specimens of the extant species,Heliaster microbrachiusXantus, were recently discovered in upper Pliocene deposits. This marks the first reported fossil occurrence of the monogeneric Heliasteridae, a group today confined to the eastern Pacific. This discovery provides further non-molluscan evidence of the close similarities between the Neogene marine fauna of Florida and the modern fauna of the eastern Pacific. The extinction of the heliasters in the western Atlantic is consistent with the pattern of many other marine groups in the region which suffered impoverishment following uplift of the Central American isthmus.

Solentiname—the End

1979 ◽  
Vol 8 (1) ◽  
pp. 11-13 ◽  
Author(s):  
Ernesto Cardenal
Keyword(s):  
Social Change ◽  
Costa Rica ◽  
Local Church ◽  
National Guard ◽  
Ernesto Cardenal ◽  
San Carlos

Ernesto Cardenal is Nicaragua's leading poet as well as being a priest committed to social change. Until October 1977 he lived on the island of Mancarron in the Solentiname archipelago in the Lake of Nicaragua, where he had organised a community among the local peasants. In that month he was accused by the authorities of instigating an uprising in neighbouring San Carlos, in which members of the Sandinista Liberation Front and government troops clashed. A warrant for Cardenal's arrest was issued in November 1977, and he went into exile in Costa Rica. The Nicaraguan National Guard meanwhile occupied the island, transforming the small local church into a prison. They destroyed all the handicraft workshops of the community as well as Cardenal's library and home. The members of the Solentiname community, like Cardenal himself, who used to be a pacifist, have now dedicated themselves to the revolutionary struggle in Nicaragua.

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