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      Composición florística del Bosque Chaqueño Serrano de la provincia de Córdoba, Argentina Translated title: Floristic composition of the Chaco Serrano Woodland in Córdoba province, Argentina

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          Abstract

          Si bien el Chaco Serrano constituye una de las principales unidades fitogeográficas de la provincia de Córdoba, son escasos y restringidos los relevamientos florísticos disponibles. Por ello, en este trabajo se analiza la composición florística del Chaco Serrano entre los 400 y 1700 m.s.m. A lo largo de los cuatro cordones montañosos que lo componen, realizamos 437 relevamientos completos de plantas vasculares, en cuadrados homogéneos de 20 × 20 m. Se registraron un total de 106 familias, 476 géneros y 896 especies de plantas vasculares. Las dos familias mejor representadas fueron Poaceae (157) y Asteraceae (143). Los géneros con mayor número de especies correspondieron a Baccharis, Eupatorium, Euphorbia, Gymnocalycium y Tillandsia. Las formas de vida con mayor número de especies fueron hierbas perennes siempre-verdes (221), graminoides (143) y arbustos (124); los árboles nativos registrados fueron 27. Del total de especies registradas, 102 (11%) fueron exóticas, 29 de ellas leñosas. Se registraron aproximadamente la mitad de especies previamente citadas para la provincia de Córdoba. Además, se mencionan 6 citas nuevas para la provincia. Estos resultados ponen de manifiesto la importancia de la unidad fitogeográfica del Chaco Serrano para la conservación de la flora de la provincia de Córdoba.

          Translated abstract

          The Chaco Serrano constitutes one of the main phytogeographic units of Córdoba province; however, available floristic information is limited and restricted. In this contribution we characterize the floristic composition of the Chaco Serrano between 400 and 1700 m a.s.l. We performed 437 comprehensive floristic samples of vascular plants in homogeneous quadrates of 20 × 20 m. A total of 106 families, 476 genera and 896 vascular plants species were recorded. Poaceae (157) and Asteraceae (143) are the best represented families while Baccharis, Eupatorium, Euphorbia, Gymnocalycium and Tillandsia are the genera with the highest number of species. Perennial evergreen herbs (221), graminoids (143) and shrubs (124) are the life forms with the highest number of species. We recorded 27 native trees species and 102 (11% of the total recorded species) alien species, 29 of them were woody. Approximately half of the species previously reported for the whole Córdoba province were recorded in this phytogeographic unit. Additionally, we provide six new records for Córdoba. These findings highlight the importance of the Chaco Serrano phytogeographic unit for the conservation of Córdoba flora.

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          Effects of Exotic Plant Invasions on Soil Nutrient Cycling Processes

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            Advantages of volunteer-based biodiversity monitoring in Europe.

            Without robust and unbiased systems for monitoring, changes in natural systems will remain enigmatic for policy makers, leaving them without a clear idea of the consequences of any environmental policies they might adopt. Generally, biodiversity-monitoring activities are not integrated or evaluated across any large geographic region. The EuMon project conducted the first large-scale evaluation of monitoring practices in Europe through an on-line questionnaire and is reporting on the results of this survey. In September 2007 the EuMon project had documented 395 monitoring schemes for species, which represents a total annual cost of about 4 million euro, involving more than 46,000 persons devoting over 148,000 person-days/year to biodiversity-monitoring activities. Here we focused on the analysis of variations of monitoring practices across a set of taxonomic groups (birds, amphibians and reptiles, mammals, butterflies, plants, and other insects) and across 5 European countries (France, Germany, Hungary, Lithuania, and Poland). Our results suggest that the overall sampling effort of a scheme is linked with the proportion of volunteers involved in that scheme. Because precision is a function of the number of monitored sites and the number of sites is maximized by volunteer involvement, our results do not support the common belief that volunteer-based schemes are too noisy to be informative. Just the opposite, we believe volunteer-based schemes provide relatively reliable data, with state-of-the-art survey designs or data-analysis methods, and consequently can yield unbiased results. Quality of data collected by volunteers is more likely determined by survey design, analytical methodology, and communication skills within the schemes rather than by volunteer involvement per se.
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              Plant invasion alters nitrogen cycling by modifying the soil nitrifying community

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                Author and article information

                Contributors
                Role: ND
                Role: ND
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                Journal
                kurtz
                Kurtziana
                Kurtziana
                Museo Botánico (Córdoba, Córdoba, Argentina )
                1852-5962
                June 2011
                : 36
                : 1
                : 9-43
                Affiliations
                [01] Córdoba orgnameCONICET-Universidad Nacional de Córdoba orgdiv1Instituto Multidisciplinario de Biología Vegetal Argentina
                Article
                S1852-59622011000100002
                f5df5168-b46a-4e98-8025-385ca2d975de

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 08 October 2010
                : 07 November 2010
                : 17 August 2010
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 63, Pages: 35
                Product

                SciELO Argentina


                Nuevas citas,Formas de vida,Conservación,Distrito Chaqueño Serrano,Native species,Alien species,Especies exóticas,Especies nativas,Conservation,Life forms,New records

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