scholarly journals Identification of Karst Forms Using LiDAR Technology: Cozumel Island, Mexico

Author(s):  
Oscar Frausto-Martínez ◽  
Norma Angelica Zapi-Salazar ◽  
Orlando Colin-Olivares
Keyword(s):  
2013 ◽  
Vol 84 (1) ◽  
pp. 392-396
Author(s):  
Tania Macouzet ◽  
Patricia Escalante-Pliego

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
Lee M. Hampton ◽  
Laurel Garrison ◽  
Jessica Kattan ◽  
Ellen Brown ◽  
Natalia A. Kozak-Muiznieks ◽  
...  

Abstract Background.  A Legionnaires' disease (LD) outbreak at a resort on Cozumel Island in Mexico was investigated by a joint Mexico-United States team in 2010. This is the first reported LD outbreak in Mexico, where LD is not a reportable disease. Methods.  Reports of LD among travelers were solicited from US health departments and the European Working Group for Legionella Infections. Records from the resort and Cozumel Island health facilities were searched for possible LD cases. In April 2010, the resort was searched for possible Legionella exposure sources. The temperature and total chlorine of the water at 38 sites in the resort were measured, and samples from those sites were tested for Legionella. Results.  Nine travelers became ill with laboratory-confirmed LD within 2 weeks of staying at the resort between May 2008 and April 2010. The resort and its potable water system were the only common exposures. No possible LD cases were identified among resort workers. Legionellae were found to have extensively colonized the resort's potable water system. Legionellae matching a case isolate were found in the resort's potable water system. Conclusions.  Medical providers should test for LD when treating community-acquired pneumonia that is severe or affecting patients who traveled in the 2 weeks before the onset of symptoms. When an LD outbreak is detected, the source should be identified and then aggressively remediated. Because LD can occur in tropical and temperate areas, all countries should consider making LD a reportable disease if they have not already done so.


2009 ◽  
Vol 19 (2) ◽  
pp. 491-502 ◽  
Author(s):  
Katherine W. McFadden ◽  
Denise García-Vasco ◽  
Alfredo D. Cuarón ◽  
David Valenzuela-Galván ◽  
Rodrigo A. Medellín ◽  
...  
Keyword(s):  

2009 ◽  
pp. 259-261 ◽  
Author(s):  
Francisco Solís-Marín ◽  
Alfredo Laguarda-Figueras ◽  
Felipe Gutierrez ◽  
Luis Mejía ◽  
Germán Yáñez

2021 ◽  
Vol 9 ◽  
Author(s):  
David Brankovits ◽  
Shawna N. Little ◽  
Tyler S. Winkler ◽  
Anne E. Tamalavage ◽  
Luis M. Mejía-Ortíz ◽  
...  

Subsurface mixing of seawater and terrestrial-borne meteoric waters on carbonate landscapes creates karst subterranean estuaries, an area of the coastal aquifer with poorly understood carbon cycling, ecosystem functioning, and impact on submarine groundwater discharge. Caves in karst platforms facilitate water and material exchange between the marine and terrestrial environments, and their internal sedimentation patterns document long-term environmental change. Sediment records from a flooded coastal cave in Cozumel Island (Mexico) document decreasing terrestrial organic matter (OM) deposition within the karst subterranean estuary over the last ∼1,000 years, with older sediment likely exported out of the cave by intense storm events. While stable carbon isotopic values (δ13Corg ranging from −22.5 to −27.1‰) and C:N ratios (ranging from 9.9 to 18.9) indicate that mangrove and other terrestrial detritus surrounding an inland sinkhole are the primarily sedimentary OM supply, an upcore decrease in bulk OM and enrichment of δ13Corg values are observed. These patterns suggest that a reduction in the local mangrove habitat decreased the terrestrial particulate OM input to the cave over time. The benthic foraminiferal community in basal core sediment have higher proportions of infaunal taxa (i.e., Bolivina) and Ammonia, and assemblages shift to increased miliolids and less infaunal taxa at the core-top sediment. The combined results suggest that a decrease in terrestrial OM through time had a concomitant impact on benthic meiofaunal habitats, potentially by impacting dissolved oxygen availability at the microhabitat scale or resource partitioning by foraminifera. The evidence presented here indicates that landscape and watershed level changes can impact ecosystem functioning within adjacent subterranean estuaries.


2018 ◽  
Vol 38 (4) ◽  
pp. 299-302
Author(s):  
Ernesto Recuero

AbstractMillipede diversity in tropical regions, and in Mexico in particular, is still mostly unknown. A modest but recurrent source of new Mexican species is the colonization of exotic species, due to human activity. The invasive speciesCylindrodesmus hirsutusPocock, 1889 has spread from its area of origin in Indonesia or Melanesia and become a virtually pantropical species. Although long known from South and Central America, reports from the Caribbean are sparse and limited to some eastern islands and southern Central America. On 9 March 2016, two adult specimens were found on Cozumel Island, Quintana Roo, in an area of medium semideciduous tropical forest. This paper comprises the first record of this species from Mexico and the northern Caribbean. Given the intense commercial activity in the region, the presence of more populations both in Cozumel Island and in the mainland coast is highly probable.


Author(s):  
Adolfo Iván Batún Alpuche ◽  
Patricia A. McAnany ◽  
Maia Dedrick

Yucatec land and labor arrangements before and after Spanish incursions are examined for ruptures and continuities. The Western concept of private property is found to ring hollow in a landscape in which intersecting spheres of authority (including those of supernaturals) guide protocols of access and extraction. Furthermore, no simple dichotomy between pre- and post-colonial can explain the range of land arrangements and networks of labor that existed across Yucatán. Through the input of labor or as a consequence of geomorphology, a patchwork of high-productivity micro-environments can be found across Yucatán and on Cozumel Island. Cultivation and/or extraction at these resource-intensive production zones encompassed a large range of labor arrangements and interdependencies during Pre-Columbian times. In general, land and labor are conceptualized as suspended within relationships of shifting authority. In reference to both land labor, authors break with the construct of “control over” and embrace the phrase “authority to,” which recognizes the role of negotiation and the inclusion of supernatural forces perceived to have played a structuring role in the disposition of land and labor.


2008 ◽  
Vol 30 (4) ◽  
pp. 493-496
Author(s):  
M.A. Gutiérrez-Aguirre ◽  
A. Cervantes-Martínez ◽  
L. Coronado-Álvarez
Keyword(s):  

2006 ◽  
Vol 16 (4) ◽  
pp. 1183-1195 ◽  
Author(s):  
Irene Romero-Nájera ◽  
Alfredo D. Cuarón ◽  
Cristopher González-Baca

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