Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case study

Autores
Stupino, Susana; Frangi, Jorge; Sarandon, Santiago Javier; Arturi, Marcelo Fabián; Ferreira, Ana Clara
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Cultivated and associated plant diversity, were compared (the last at 3 scales: alpha, beta and gamma), in 2 farms under conventional and organic management in La Plata. The relevé method was used for associated species recording in spring and summer. At farm level we assessed total spontaneous specific richness (γ diversity), genus and family richness. Richness – species total per crop- was used as index of α diversity. We also calculated the median richness per crop sample unit. A randomization method was used to assess the degree for which differences between the observed and expected median richness per crop in a management style are attributable to chance. β diversity values were compared to a random framework, separately for each farm. Results indicate that the organic farm had higher associated diversity at all levels; also, higher number of cultivated plots and species, and proportion of exclusive, perennials, native and utilitarian species. In the organic farm crops with higher or lower median richness than expected, and higher β, indicated higher spatial and seasonal heterogeneity. Conventional management limited spontaneous plants to a reduced, homogeneously distributed group. Other factors may influence associated plant diversity.
Se comparó la diversidad cultivada y asociada de plantas, la última a 3 escalas (alfa, beta y gamma), en 2 fincas una con manejo convencional y otra con manejo orgánico en La Plata. Se aplicó el método del relevé para las especies asociadas. A nivel finca se determinó la riqueza específica espontánea total (diversidad γ), y la riqueza de géneros y familias. La riqueza - total de especies por cultivo - se usó como índice de diversidad α. Se calculó la mediana de la riqueza por unidad muestral para cada cultivo, aplicándose un método de aleatorización para conocer la significancia de las diferencias entre las medianas observada y esperada por cultivo en un estilo de manejo. Los valores de diversidad β se compararon con un modelo al azar, en cada finca. La finca orgánica tuvo una mayor diversidad asociada en todos los niveles; un número más alto de parcelas y especies cultivadas, de proporción de especies exclusivas, perennes, nativas y utilitarias. En la finca orgánica los cultivos con una mediana de la riqueza más alta o más baja que la esperada, y β más alto, indicaron mayor heterogeneidad espacial y estacional. El manejo convencional limitó las plantas espontáneas a un grupo reducido, homogéneamente distribuido. Otros factores pueden influenciar la diversidad de plantas asociadas.
Materia
Ciencias Agrícolas
horticulture
agrobiodiversity
associated diversity
agroecosystems
Nivel de accesibilidad
acceso abierto
Condiciones de uso
Repositorio
CIC Digital (CICBA)
Institución
Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
OAI Identificador
oai:digital.cic.gba.gob.ar:11746/7844

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repository_id_str 9441
network_name_str CIC Digital (CICBA)
spelling Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case studyStupino, SusanaFrangi, JorgeSarandon, Santiago JavierArturi, Marcelo FabiánFerreira, Ana ClaraCiencias Agrícolashorticultureagrobiodiversityassociated diversityagroecosystemsCultivated and associated plant diversity, were compared (the last at 3 scales: alpha, beta and gamma), in 2 farms under conventional and organic management in La Plata. The relevé method was used for associated species recording in spring and summer. At farm level we assessed total spontaneous specific richness (γ diversity), genus and family richness. Richness – species total per crop- was used as index of α diversity. We also calculated the median richness per crop sample unit. A randomization method was used to assess the degree for which differences between the observed and expected median richness per crop in a management style are attributable to chance. β diversity values were compared to a random framework, separately for each farm. Results indicate that the organic farm had higher associated diversity at all levels; also, higher number of cultivated plots and species, and proportion of exclusive, perennials, native and utilitarian species. In the organic farm crops with higher or lower median richness than expected, and higher β, indicated higher spatial and seasonal heterogeneity. Conventional management limited spontaneous plants to a reduced, homogeneously distributed group. Other factors may influence associated plant diversity.Se comparó la diversidad cultivada y asociada de plantas, la última a 3 escalas (alfa, beta y gamma), en 2 fincas una con manejo convencional y otra con manejo orgánico en La Plata. Se aplicó el método del relevé para las especies asociadas. A nivel finca se determinó la riqueza específica espontánea total (diversidad γ), y la riqueza de géneros y familias. La riqueza - total de especies por cultivo - se usó como índice de diversidad α. Se calculó la mediana de la riqueza por unidad muestral para cada cultivo, aplicándose un método de aleatorización para conocer la significancia de las diferencias entre las medianas observada y esperada por cultivo en un estilo de manejo. Los valores de diversidad β se compararon con un modelo al azar, en cada finca. La finca orgánica tuvo una mayor diversidad asociada en todos los niveles; un número más alto de parcelas y especies cultivadas, de proporción de especies exclusivas, perennes, nativas y utilitarias. En la finca orgánica los cultivos con una mediana de la riqueza más alta o más baja que la esperada, y β más alto, indicaron mayor heterogeneidad espacial y estacional. El manejo convencional limitó las plantas espontáneas a un grupo reducido, homogéneamente distribuido. Otros factores pueden influenciar la diversidad de plantas asociadas.2008info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://digital.cic.gba.gob.ar/handle/11746/7844enginfo:eu-repo/semantics/altIdentifier/hdl/10915/69113info:eu-repo/semantics/openAccessreponame:CIC Digital (CICBA)instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Airesinstacron:CICBA2025-09-04T09:43:12Zoai:digital.cic.gba.gob.ar:11746/7844Institucionalhttp://digital.cic.gba.gob.arOrganismo científico-tecnológicoNo correspondehttp://digital.cic.gba.gob.ar/oai/snrdmarisa.degiusti@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:94412025-09-04 09:43:13.285CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Airesfalse
dc.title.none.fl_str_mv Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case study
title Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case study
spellingShingle Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case study
Stupino, Susana
Ciencias Agrícolas
horticulture
agrobiodiversity
associated diversity
agroecosystems
title_short Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case study
title_full Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case study
title_fullStr Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case study
title_full_unstemmed Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case study
title_sort Plant diversity in two horticultural farms under organic and conventional management in La Plata, Argentina: a case study
dc.creator.none.fl_str_mv Stupino, Susana
Frangi, Jorge
Sarandon, Santiago Javier
Arturi, Marcelo Fabián
Ferreira, Ana Clara
author Stupino, Susana
author_facet Stupino, Susana
Frangi, Jorge
Sarandon, Santiago Javier
Arturi, Marcelo Fabián
Ferreira, Ana Clara
author_role author
author2 Frangi, Jorge
Sarandon, Santiago Javier
Arturi, Marcelo Fabián
Ferreira, Ana Clara
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Agrícolas
horticulture
agrobiodiversity
associated diversity
agroecosystems
topic Ciencias Agrícolas
horticulture
agrobiodiversity
associated diversity
agroecosystems
dc.description.none.fl_txt_mv Cultivated and associated plant diversity, were compared (the last at 3 scales: alpha, beta and gamma), in 2 farms under conventional and organic management in La Plata. The relevé method was used for associated species recording in spring and summer. At farm level we assessed total spontaneous specific richness (γ diversity), genus and family richness. Richness – species total per crop- was used as index of α diversity. We also calculated the median richness per crop sample unit. A randomization method was used to assess the degree for which differences between the observed and expected median richness per crop in a management style are attributable to chance. β diversity values were compared to a random framework, separately for each farm. Results indicate that the organic farm had higher associated diversity at all levels; also, higher number of cultivated plots and species, and proportion of exclusive, perennials, native and utilitarian species. In the organic farm crops with higher or lower median richness than expected, and higher β, indicated higher spatial and seasonal heterogeneity. Conventional management limited spontaneous plants to a reduced, homogeneously distributed group. Other factors may influence associated plant diversity.
Se comparó la diversidad cultivada y asociada de plantas, la última a 3 escalas (alfa, beta y gamma), en 2 fincas una con manejo convencional y otra con manejo orgánico en La Plata. Se aplicó el método del relevé para las especies asociadas. A nivel finca se determinó la riqueza específica espontánea total (diversidad γ), y la riqueza de géneros y familias. La riqueza - total de especies por cultivo - se usó como índice de diversidad α. Se calculó la mediana de la riqueza por unidad muestral para cada cultivo, aplicándose un método de aleatorización para conocer la significancia de las diferencias entre las medianas observada y esperada por cultivo en un estilo de manejo. Los valores de diversidad β se compararon con un modelo al azar, en cada finca. La finca orgánica tuvo una mayor diversidad asociada en todos los niveles; un número más alto de parcelas y especies cultivadas, de proporción de especies exclusivas, perennes, nativas y utilitarias. En la finca orgánica los cultivos con una mediana de la riqueza más alta o más baja que la esperada, y β más alto, indicaron mayor heterogeneidad espacial y estacional. El manejo convencional limitó las plantas espontáneas a un grupo reducido, homogéneamente distribuido. Otros factores pueden influenciar la diversidad de plantas asociadas.
description Cultivated and associated plant diversity, were compared (the last at 3 scales: alpha, beta and gamma), in 2 farms under conventional and organic management in La Plata. The relevé method was used for associated species recording in spring and summer. At farm level we assessed total spontaneous specific richness (γ diversity), genus and family richness. Richness – species total per crop- was used as index of α diversity. We also calculated the median richness per crop sample unit. A randomization method was used to assess the degree for which differences between the observed and expected median richness per crop in a management style are attributable to chance. β diversity values were compared to a random framework, separately for each farm. Results indicate that the organic farm had higher associated diversity at all levels; also, higher number of cultivated plots and species, and proportion of exclusive, perennials, native and utilitarian species. In the organic farm crops with higher or lower median richness than expected, and higher β, indicated higher spatial and seasonal heterogeneity. Conventional management limited spontaneous plants to a reduced, homogeneously distributed group. Other factors may influence associated plant diversity.
publishDate 2008
dc.date.none.fl_str_mv 2008
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repository.mail.fl_str_mv marisa.degiusti@sedici.unlp.edu.ar
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