Results 1 to 10 of about 9,072,061 (153)

Seed-cone architecture of Pararaucaria utahensis Gee, Howell et Dayvault sp. nov. (Cheirolepidiaceae) from the Upper Jurassic Morrison Formation of Utah, USA. [PDF]

Am J Bot
Abstract Premise Although Pararaucaria seed cones were first described 90 years ago, only in the last dozen years have we discovered the greater extent of the species diversity and paleogeographic range of the genus. Pararaucaria is now known across the mid‐latitudes of the Lower Jurassic to Lower Cretaceous in the northern and southern hemispheres ...
Gee CT, Howell MM, Dayvault RD.
europepmc   +2 more sources

Integrating Niche Dimensions to Advance the Ecological Study of the Americas' Smallest Cat: The Guigna in Argentine Patagonia. [PDF]

Ecol Evol
We present our findings from the first multi‐annual survey of guigna in Argentine Patagonia. We found that habitat use for guignas was negatively affected by the presence of co‐predators and open vegetation; conversely, it was positively affected by the occurrence of thick forests and the presence of potential prey.
Guerisoli MM, Bauer G, Sarra Pistone S, Buffa E, Bonaglia C, Giordano AJ, Schiaffini MI.   +6 more
europepmc   +2 more sources

Latest Cretaceous megaraptorid theropod dinosaur sheds light on megaraptoran evolution and palaeobiology [PDF]

Nature Communications
Recent fossil discoveries have cast considerable light on the palaeobiology of Megaraptora, a group of large-clawed carnivorous theropod dinosaurs known from Cretaceous deposits in Asia, Australia, and especially South America.
Lucio M. Ibiricu, Matthew C. Lamanna, Bruno N. Alvarez, Ignacio A. Cerda, Julieta L. Caglianone, Noelia V. Cardozo, Marcelo Luna, Rubén D. Martínez   +7 more
doaj   +2 more sources

Exploring the effects of climatic and environmental heterogeneity on the spatial activity of Patagonian bats [PDF]

BMC Ecology and Evolution
Background The Patagonian region hosts endemic bat species and represents the southernmost distribution limit for several vespertilionids and molossids species. In cold temperate regions, insectivorous bats are more active during summer.
Analía Laura Giménez, Marta Gladys Grech, Óscar De Paz   +2 more
doaj   +2 more sources

Niche Divergence in the South American Freshwater Crustacean <i>Aegla</i> Provides Insights Into Its Diversification. [PDF]

Ecol Evol
We investigated niche divergence among Aegla clades of freshwater crustaceans from southern South America. Results show distinct climatic preferences with low overlap, rejecting conservatism and linking ecology to diversification, highlighting niche divergence driving freshwater biodiversity.
Puli G, Mainardi ÁA, Sbruzzi H, Santos S, Bartholomei-Santos ML.   +4 more
europepmc   +2 more sources

Soil Microbial Diversity and Network Organization Respond to Land Use and Agricultural Inputs Worldwide. [PDF]

Glob Chang Biol
Based on a global analysis of 1921 soil samples, we show that agricultural management acts as a powerful ecological filter reshaping microbial communities. Land use and inputs—pesticides and fertilizers—drive a functional shift toward opportunistic pathogens and fragmented, less connected microbial networks, potentially compromising soil ecosystem ...
Saati-Santamaría Z, Pérez-Gorjón S, Abel-Schaad D, Acedo-Bécares A, Alba-Sánchez F, Alves AL, Babinska-Wensierska W, Marfetán JA, Barroetaveña C, Barry K, Beitia F, Biniari K, Bobadilla-Peñaló EM, Bonito G, Boutaris M, Bueno-González V, Cabezas G, Charalambos P, Copoț O, de Errasti A, de Pedro Noriega L, Delavault P, Dianez-Martínez F, Diez-Méndez D, Ercole E, Fernández-Ruiz A, Ferraguti M, Gallo AL, García-Fraile P, Garrido M, González Del Pozo D, Greslebin AG, Grilli G, Guilcapi-Pacheco ED, Haelewaters D, Henkel TW, Hirigoyen A, Hosaka K, Huais PY, Jalli M, Justo A, Keskitalo M, La Mantia T, Lambevska A, Langer E, Leconte C, Lojkowska E, Marcos-Vidal D, Mendoza-Fernández AJ, Miralles-Mellado I, Molina L, Muzhinji N, Nguyen MN, Nieto-Lugilde D, Nieto-Palenzuela A, Njouonkou AL, Norvell S, Oficialdegui FJ, Ortega Pérez R, Palojärvi A, Paradelo-Pérez M, Pavone Z, Peñas de Giles J, Persiani AM, Pildain MB, Pinto-Carrasco D, Poulin L, Pouvreau JB, Quatrini P, Rodríguez de la Cruz D, Romano GM, Rosas-Ramos N, Ruano F, Salcedo-Larralde I, Salmerón-Sánchez E, Sam K, Sharp C, Tiago PV, Valenzuela R, Vasco-Palacios AM, Vasilis M, Vélez ML, Vizzini A, Volobuev S, Wood AR, Yli-Hemminki P, Yorou NS, Zmitrovich IV, Bobo-Pinilla J.   +88 more
europepmc   +2 more sources

Not a Sip: Effects of Zero Tolerance Laws on Road Traffic Fatalities. [PDF]

Health Econ
ABSTRACT A substantial proportion of alcohol related fatalities and their consequences are preventable, prompting policymakers to implement measures aimed at reducing these deaths. I exploit time and geographic variation in the adoption of zero‐tolerance laws in a difference‐in‐differences design to study the impact of these regulations on traffic ...
Ramasco A.
europepmc   +2 more sources

A brachiosaurid sauropod from the Late Jurassic Cañadón Calcáreo Formation of Chubut, Argentina [PDF]

Fossil Record, 2006
Fragmentary sauropod remains from the Late Jurassic (Tithonian) Cañadón Calcáreo Formation of Chubut, Argentinean Patagonia, are derived from a taxon of large size, but with very slender forelimbs.
O. W. M. Rauhut
doaj   +5 more sources

TURTLES FROM THE MATA AMARILLA FORMATION (CENOMANIAN), SANTA CRUZ, ARGENTINA: THE SOUTHERMOST RECORD OF PROCHELIDELLA SPP. (PLEURODIRA: CHELIDAE)

Publicación Electrónica de la Asociación Paleontológica Argentina, 2022
The fossil record of Cretaceous turtles in Santa Cruz Province is scarce. Turtles have been reported from the Mata Amarilla Formation (Cenomanian), the Cerro Fortaleza Formation (Campanian–Maastrichtian), and the Chorrillo Formation (early Maastrichtian).
Juliana Sterli, Marcelo Saúl de la Fuente, Ignacio Jorge Maniel, Augusto Nicolás Varela, Daniel Gustavo Poiré   +4 more
doaj   +1 more source

http://www.app.pan.pl/article/item/app003732017.html [PDF]

Acta Palaeontologica Polonica, 2017
The Interatheriinae (Notoungulata, Interatheriidae) from the Collón Curá Formation (Colloncuran South American Land Mammal Age, SALMA) are revised here, based on old and new collections from western Neuquén, Río Negro, and Chubut provinces where this ...
Bárbara Vera, Marcelo Reguero, Laureano González-Ruiz   +2 more
doaj   +1 more source