New additions to the introduced flora of the Juan Fernández Islands: origin, distribution, life history traits, and potential of invasion

Oceanic islands, such as Juan Fernández in Chile, are the home for particular biotas that have evolved in isolation over a long period. The anthropogenic introduction of allochtonous plants is one of many problems for the conservation of endemic elements. In this paper, we present the new additions...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	CUEVAS,JAIME G., MARTICORENA,ALICIA, CAVIERES,LOHENGRIN A.
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2004
Materias:	biological invasions garden plants oceanic islands plant introductions weeds
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000300011
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0716-078X2004000300011
record_format	dspace
spelling	oai:scielo:S0716-078X20040003000112004-10-21New additions to the introduced flora of the Juan Fernández Islands: origin, distribution, life history traits, and potential of invasionCUEVAS,JAIME G.MARTICORENA,ALICIACAVIERES,LOHENGRIN A. biological invasions garden plants oceanic islands plant introductions weeds Oceanic islands, such as Juan Fernández in Chile, are the home for particular biotas that have evolved in isolation over a long period. The anthropogenic introduction of allochtonous plants is one of many problems for the conservation of endemic elements. In this paper, we present the new additions to the introduced flora of the Juan Fernández Islands, adding some comments about their life form, origin, morphological characteristics, ecology, distribution, abundance, and their potential of invasion. We cited 27 new species, 12 new genera, and three new families for the Juan Fernández flora (Amaryllidaceae, Commelinaceae and Violaceae). Most genera belonged to Asteraceae (seven species). Fifty-nine percent of taxa were perennial herbs, followed by annual or biennial herbs. Wind was the main vector of propagule dispersal (42 %), followed by vegetative dispersal (23 %). Fifty-two percent of the species were weeds and 44 % were plants with dual behaviour: garden-weed plant. Eurasia was the most frequent area of plant origin (70 %). Ninety-four percent of the taxa with known geographic range are in the V Region of mainland Chile, which is the main region of export of plants and materials to the archipelago, suggesting that this may have been the immediate origin of these introductions. Sixty-three percent of the species were only found in the San Juan Bautista urban area, while the remaining taxa were also (22 %) or exclusively (15 %) found in other places of the main island (Robinson Crusoe). Sixteen species (59 %) are considered as noxious weeds in Juan Fernández or elsewhere, and they should be a focus of attention and, eventually, control. Summing our findings to previous lists of introduced taxa, we obtained 260 non-native taxa in Juan Fernández. This number is greater than the native taxa (211), which demonstrate how the human intentional and non-intentional action can dramatically change the floristic composition of an oceanic archipelago. We strongly recommend the installation of a sanitary control in Robinson Crusoe Island or in Valparaíso, in association with quarantine procedures with the food vegetables, and biological products in generalinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.77 n.3 20042004-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000300011en10.4067/S0716-078X2004000300011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	biological invasions garden plants oceanic islands plant introductions weeds
spellingShingle	biological invasions garden plants oceanic islands plant introductions weeds CUEVAS,JAIME G. MARTICORENA,ALICIA CAVIERES,LOHENGRIN A. New additions to the introduced flora of the Juan Fernández Islands: origin, distribution, life history traits, and potential of invasion
description	Oceanic islands, such as Juan Fernández in Chile, are the home for particular biotas that have evolved in isolation over a long period. The anthropogenic introduction of allochtonous plants is one of many problems for the conservation of endemic elements. In this paper, we present the new additions to the introduced flora of the Juan Fernández Islands, adding some comments about their life form, origin, morphological characteristics, ecology, distribution, abundance, and their potential of invasion. We cited 27 new species, 12 new genera, and three new families for the Juan Fernández flora (Amaryllidaceae, Commelinaceae and Violaceae). Most genera belonged to Asteraceae (seven species). Fifty-nine percent of taxa were perennial herbs, followed by annual or biennial herbs. Wind was the main vector of propagule dispersal (42 %), followed by vegetative dispersal (23 %). Fifty-two percent of the species were weeds and 44 % were plants with dual behaviour: garden-weed plant. Eurasia was the most frequent area of plant origin (70 %). Ninety-four percent of the taxa with known geographic range are in the V Region of mainland Chile, which is the main region of export of plants and materials to the archipelago, suggesting that this may have been the immediate origin of these introductions. Sixty-three percent of the species were only found in the San Juan Bautista urban area, while the remaining taxa were also (22 %) or exclusively (15 %) found in other places of the main island (Robinson Crusoe). Sixteen species (59 %) are considered as noxious weeds in Juan Fernández or elsewhere, and they should be a focus of attention and, eventually, control. Summing our findings to previous lists of introduced taxa, we obtained 260 non-native taxa in Juan Fernández. This number is greater than the native taxa (211), which demonstrate how the human intentional and non-intentional action can dramatically change the floristic composition of an oceanic archipelago. We strongly recommend the installation of a sanitary control in Robinson Crusoe Island or in Valparaíso, in association with quarantine procedures with the food vegetables, and biological products in general
author	CUEVAS,JAIME G. MARTICORENA,ALICIA CAVIERES,LOHENGRIN A.
author_facet	CUEVAS,JAIME G. MARTICORENA,ALICIA CAVIERES,LOHENGRIN A.
author_sort	CUEVAS,JAIME G.
title	New additions to the introduced flora of the Juan Fernández Islands: origin, distribution, life history traits, and potential of invasion
title_short	New additions to the introduced flora of the Juan Fernández Islands: origin, distribution, life history traits, and potential of invasion
title_full	New additions to the introduced flora of the Juan Fernández Islands: origin, distribution, life history traits, and potential of invasion
title_fullStr	New additions to the introduced flora of the Juan Fernández Islands: origin, distribution, life history traits, and potential of invasion
title_full_unstemmed	New additions to the introduced flora of the Juan Fernández Islands: origin, distribution, life history traits, and potential of invasion
title_sort	new additions to the introduced flora of the juan fernández islands: origin, distribution, life history traits, and potential of invasion
publisher	Sociedad de Biología de Chile
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000300011
work_keys_str_mv	AT cuevasjaimeg newadditionstotheintroducedfloraofthejuanfernandezislandsorigindistributionlifehistorytraitsandpotentialofinvasion AT marticorenaalicia newadditionstotheintroducedfloraofthejuanfernandezislandsorigindistributionlifehistorytraitsandpotentialofinvasion AT caviereslohengrina newadditionstotheintroducedfloraofthejuanfernandezislandsorigindistributionlifehistorytraitsandpotentialofinvasion
_version_	1718439563951603712

New additions to the introduced flora of the Juan Fernández Islands: origin, distribution, life history traits, and potential of invasion

Ejemplares similares