Results 1 to 10 of about 5,687 (205)

Museomics Unveil the Phylogeny and Biogeography of the Neglected Juan Fernandez Archipelago Megalachne and Podophorus Endemic Grasses and Their Connection With Relict Pampean-Ventanian Fescues. [PDF]

Front Plant Sci, 2020
Oceanic islands constitute natural laboratories to study plant speciation and biogeographic patterns of island endemics. Juan Fernandez is a southern Pacific archipelago consisting of three small oceanic islands located 600–700 km west of the Chilean coastline.
Moreno-Aguilar MF, Arnelas I, Sánchez-Rodríguez A, Viruel J, Catalán P.   +4 more
europepmc   +9 more sources

Demographic rise of sea urchin Centrostephanus sylviae on Robinson Crusoe and Santa Clara Islands at the Juan Fernandez Archipelago: A biophysical and ecological approach. [PDF]

PLoS One
The large increase in the population of long-spined sea urchins (Centrostephanus sylviae) has gained significant attention in the past decade due to the rise in the number of individuals reported as bycatch in Juan Fernandez rock lobster traps (Jasus frontalis) and the risks associated with changes in the ecosystem structure due to the increase in ...
Nuñez-Espinosa V, Parada C, Tapia B, Ernst B, Porobic J, Véliz D, Hinojosa I, Yévenes-Vega L.   +7 more
europepmc   +4 more sources

Chromosome Numbers of Angiosperms from the Juan Fernandez Islands, the Tristan da Cunha Archipelago, and from Mainland Chile [PDF]

Pacific Science, 2005
ABSTRACT Chromosome counts for eight native species in six genera from Juan Fernandez Islands, five native species in three genera from Tristan da Cunha, and three species in two genera from mainland Chile are presented and discussed. They include the only chromosome number reports for angiosperms from Tristan da Cunha and first counts for the endemics
Kiehn, Michael, Jodl, Marion, Jakubowsky, Gerhard   +2 more
openaire   +4 more sources

Taxonomy and biogeography of the coastal fishes of Juan Fernández Archipelago and Desventuradas Islands, Chile [PDF]

Revista de biología marina y oceanografía, 2010
The Desventuradas Islands (San Felix and San Ambrosio) and Juan Fernandez Archipelago (Robinson Crusoe and Alejandro Selkirk) are oceanic islands of volcanic origin located in the southeastern Pacific off Chile. Based on new material collected since 1997, revision of the R/V Anton Bruun expeditions collections, and a taxonomic update, the coastal fish ...
Dyer, Brian S, Westneat, Mark W
openaire   +5 more sources

The Relative Roles of Selection and Drift in the Chaffinch Radiation (Aves: <i>Fringilla</i>) Across the Atlantic Archipelagos of Macaronesia. [PDF]

Ecol Evol
When colonizing oceanic archipelagos, island populations diverge through mechanisms of local adaptation and neutral processes. This study investigates the roles of selection and genetic drift in the radiation of chaffinches (Fringilla genus) in Macaronesia.
Condori B, Recuerda M, Illera JC, Milá B.   +3 more
europepmc   +2 more sources

Potential of Ex Situ Conservation Strains Revealed by Genetic Analysis of Oceanic Islands' Endangered Species Pittosporum parvifolium. [PDF]

Ecol Evol
The Ogasawara Islands, home to the critically endangered shrub Pittosporum parvifolium, have seen significant conservation efforts, yet challenges remain due to insufficient critical information. Our study used simple sequence repeat markers to reveal high genetic diversity in both in situ and ex situ populations, with unique genotypes found in each ...
Kawakita H, Sakaguchi S, Katoh S, Kato H, Tanaka T, Komaki Y, Ideno T, Setoguchi H.   +7 more
europepmc   +2 more sources

Cytological investigations on populations of Taraxacum (Asteraceae) from the Juan Fernandez Archipelago, Chile [PDF]

Gayana: Botanica, 2013
Durante una expedicion al Archipielago de Juan Fernandez, Chile, en febrero de 2011, se recolectaron semillas de Taraxacumfernandezianum Dahlst. provenientes de las islas Robinson Crusoe y Alejandro Selkirk. Se realizo un analisis citologico de las dos poblaciones y se concluyo que ambas son triploides, con un 2n = 3x = 24 cromosomas, con una formula ...
Baeza, Carlos M., Bastías, Cristián, Stuessy, Tod, Ruiz, Eduardo A., Greimler, Josef, Lopez Sepulveda, Patricio, Penailillo Brito, Patricio, Novoa, Patricio, Gatica, Alejandro   +8 more
openaire   +4 more sources

POACEAE EN EL ARCHIPIELAGO DE JUAN FERNANDEZ (ROBINSON CRUSOE) POACEAE IN THE JUAN FERNANDEZ ARCHIPELAGO (ROBINSON CRUSOE)

Gayana: Botanica, 2007
El archipiélago de Juan Fernández (Robinson Crusoe) está ubicado a 670 km al oeste de Valparaíso, en el Océano Pacífico. Está formado por tres islas, todas de origen volcánico: Más a Tierra (Robinson Crusoe) Más Afuera (Alejandro Selkirk) y Santa Clara.
Carlos M Baeza, Clodomiro Marticorena, Tod Stuessy, Eduardo Ruiz, María Negritto   +4 more
openaire   +2 more sources

The angiosperm flora of the Archipelago Juan Fernandez (Chile): origin and dispersal

Canadian Journal of Botany, 2006
We review the hypothesized origin and the methods of arrival of the angiosperm colonists to the Juan Fernandez Islands. We also summarize the dispersal capabilities of the current flora, including data on fruit type, fruit length, and dispersal unit length, correlating these features with dispersal and establishment. Most species originated from South
Bernardello, Gabriel Luis Mario, Anderson, Gregory J., Stuessy, Tod F., Crawford, Daniel J.   +3 more
openaire   +2 more sources

Intrathermocline eddies at the Juan Fernandez Archipelago, southeastern Pacific Ocean

Latin American Journal of Aquatic Research, 2014
Regional Ocean Modeling System (ROMS) results, combined with chlorophyll-α (Chl-α) and satellite altimetry information as well as information from oceanographic cruises were analyzed to identify interactions between intrathermocline eddies (ITEs) and the Juan Fernández Archipelago (JFA), and discuss their potential impact on surface Chl-α ...
Andrade, Isabel, Hormazábal, Samuel, Combes, Vincent   +2 more
openaire   +3 more sources