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dc.title Diversidad y distribución de acridios (Orthoptera: Acridoidea) en pastizales del sur de la región pampeana, Argentina es
dc.type Artículo es
dcterms.abstract In Argentina, the grasslands of Pampas region comprise approximately 15% of the country. As in other grasslands of the world, grasshoppers are among the most important native herbivores. Their economic importance has been recognized in Argentina since the mid to late nineteenth century, since outbreaks of different species have become recurrent phenomena. Therefore, the main objective of this work was to study their diversity and distribution in grasslands of the Southern Pampas region (Laprida county, Buenos Aires province), as one of the most affected areas. The study was conducted during five seasons (2005-10). Sampling sites were represented by the most common plant communities in this area, classified in four categories: native grasslands, disturbed grasslands, implanted pastures and halophilous grasslands. The samplings were conducted from mid-spring to early autumn, with five or six samples per season. We estimated the following population descriptors: species richness (S), eveness (E), dominance (J), and diversity index (H´). In order to evaluate the similitude of the grasshopper communities present in the different plant communities, we used qualitative and quantitative coefficients of similitude. A total of 22 species of grasshoppers were collected, of which 21 belong to the family Acrididae. The subfamily Melanoplinae was the most diverse with eight species. The largest species richness was recorded in native grasslands (18). The different communities of grasshoppers had similar indices of evenness and dominance (p>0.05). Considering all plant communities, the average value of Shannon-Wiener index was 1.58±0.075. There was a positive correlation between evenness index and species richness (p<0.05). The diversity index H’ was different between plants communities (p<0.05), and it was higher in the disturbed grassland (1.75±0.096, p<0.05) than in the halophilous grasslands (1.34±0.12). Native and disturbed grasslands had a higher plant richness than halophilous grasslands and implanted pastures (p<0.05). There was a positive relationship between plant richness and grasshoppers species richness, and diversity of grasshoppers. According to the qualitative indices applied, the similitude between different grasshopper communities was higher than 60%. In general, the species that had a higher frequency of occurrence showed greater abundance and distribution. Covasacris pallidinota, Dichroplus elongatus, D. maculipennis, Borellia bruneri and B. pallida were the most widely distributed species, most of them (12) showed a restricted distribution and few (five) an intermediate distribution en
dcterms.alternative Diversity and distribution of grasshoppers (Orthoptera: Acridoidea) in grasslands of the Southern Pampas region, Argentina en
dcterms.extent p. 111-124 es
dcterms.issued 2013-03
dcterms.language Español es
dcterms.license Attribution-NonCommercial 4.0 International (BY-NC 4.0) es
dcterms.publisher Universidad de Costa Rica es
dcterms.spatial Región Pampeana (Argentina) es
dcterms.subject Saltamontes es
dcterms.subject Pastizales es
dcterms.subject índice de diversidad es
dcterms.subject distribución es
cic.version info:eu-repo/semantics/publishedVersion es Mariottini, Yanina es De Wysiecki, María Laura es Lange, Carlos Ernesto es
cic.lugarDesarrollo Universidad Nacional de La Plata es
dcterms.subject.materia Ciencias Biológicas es
dcterms.identifier.url Recurso completo es
dcterms.identifier.other ISSN 0034-7744 es
dcterms.isPartOf.item Informe científico de investigador: Lange, Carlos Ernesto (2013-2014) es
dcterms.isPartOf.issue vol.61 n.1 es
dcterms.isPartOf.series Revista de Biologia Tropical es
cic.isPeerReviewed true es
cic.isFulltext true es


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