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 | Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha : |
24/05/2023 |
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Actualizado : |
24/05/2023 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
GARCÍA, S.; GUIDO, A.; PEZZANI, F.; LATTANZI, F. |
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Afiliación : |
SILVINA GARCÍA, Ecología, Departamento de Sistemas Ambientales, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay; ANACLARA GUIDO, Grupo Ecología de Pastizales, Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay; FABIANA PEZZANI, Ecología, Departamento de Sistemas Ambientales, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay; FERNANDO A. LATTANZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Invasion strategies of Cynodon dactylon: competitive ability under low-nutrient conditions |
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Fecha de publicación : |
2023 |
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Fuente / Imprenta : |
Austral Ecology, 2023. https://doi.org/10.1111/aec.13341 |
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ISSN : |
1442-9985 |
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DOI : |
10.1111/aec.13341 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 8 July 2022; Revised 10 April 2023; Accepted 13 April 2023; First published 05 May 2023. -- Correspondence auhtor: García, S.; Ecología, Departamento de Sistemas Ambientales, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay; email:sgarciae@fagro.edu.uy -- Funding: This research was funded by Instituto Nacional de Investigación Agropecuaria (INIA) and Comisión Sectorial de Investigación Científica (UdelaR-CSIC), Comisión Académica de Posgrado (CAP, Silvina García received a doctoral fellowship). |
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Contenido : |
ABSTRACT.- Cynodon dactylon is one of the five most important invasive alien species worldwide. It is the invasive alien species with the broadest distribution range in Uruguay, and its expansion is frequently associated with disturbances. Since natural grasslands are facing processes of productive intensification, C. dactylon represents a threat as it could displace native species. However, the mechanisms that explain its invasion success remain unclear. The objective of this study was to analyse interspecific interactions under low nutrient conditions between C. dactylon and two species that are native to the Campo grasslands in Uruguay. Specifically, we assessed differences in the components of competitive ability effects and responses (or tolerance) as possible mechanisms involved in C. dactylon invasiveness. We performed a greenhouse experiment in pots with low-nutrient substrate assessing pair-wise interactions between C. dactylon, Mnesithea selloana and Paspalum notatum plus control pots consisting of single individual of each species. The invasive species showed greater competitive ability than both native grasses, as it reduced their below and above-biomass. Conversely, the size of C. dactylon plants interacting with native species was similar to that of single C. dactylon plants growing alone (controls). This reveals that the greater competitive ability of the invasive species was due to a greater tolerance to grow with neighbouring plants. The reason underlying this tolerance was a marked increase in biomass allocation towards stolons and leaves, at the expense of roots. Conversely, native species barely changed their shoot-root allocation pattern when interacting with neighbours. Furthermore, C. dactylon induced reproductive development solely when interacting with neighbours. Along with the fact that the potential growth rate of the invasive and native species was quite similar, these results suggest that sensitive and rapidly triggered shade avoidance responses could be one mechanism involved in the invasion success of C. dactylon. © 2023 Ecological Society of Australia. MenosABSTRACT.- Cynodon dactylon is one of the five most important invasive alien species worldwide. It is the invasive alien species with the broadest distribution range in Uruguay, and its expansion is frequently associated with disturbances. Since natural grasslands are facing processes of productive intensification, C. dactylon represents a threat as it could displace native species. However, the mechanisms that explain its invasion success remain unclear. The objective of this study was to analyse interspecific interactions under low nutrient conditions between C. dactylon and two species that are native to the Campo grasslands in Uruguay. Specifically, we assessed differences in the components of competitive ability effects and responses (or tolerance) as possible mechanisms involved in C. dactylon invasiveness. We performed a greenhouse experiment in pots with low-nutrient substrate assessing pair-wise interactions between C. dactylon, Mnesithea selloana and Paspalum notatum plus control pots consisting of single individual of each species. The invasive species showed greater competitive ability than both native grasses, as it reduced their below and above-biomass. Conversely, the size of C. dactylon plants interacting with native species was similar to that of single C. dactylon plants growing alone (controls). This reveals that the greater competitive ability of the invasive species was due to a greater tolerance to grow with neighbouring plants. The reason underlying th... Presentar Todo |
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Palabras claves : |
Biological invasions; Competitive ability; Mnesithea selloana; Paspalum notatum; Uruguayan campo grasslands. |
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Asunto categoría : |
F01 Cultivo |
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Marc : |
LEADER 03421naa a2200253 a 4500
001 1064165
005 2023-05-24
008 2023 bl uuuu u00u1 u #d
022 $a1442-9985
024 7 $a10.1111/aec.13341$2DOI
100 1 $aGARCÍA, S.
245 $aInvasion strategies of Cynodon dactylon$bcompetitive ability under low-nutrient conditions$h[electronic resource]
260 $c2023
500 $aArticle history: Received 8 July 2022; Revised 10 April 2023; Accepted 13 April 2023; First published 05 May 2023. -- Correspondence auhtor: García, S.; Ecología, Departamento de Sistemas Ambientales, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay; email:sgarciae@fagro.edu.uy -- Funding: This research was funded by Instituto Nacional de Investigación Agropecuaria (INIA) and Comisión Sectorial de Investigación Científica (UdelaR-CSIC), Comisión Académica de Posgrado (CAP, Silvina García received a doctoral fellowship).
520 $aABSTRACT.- Cynodon dactylon is one of the five most important invasive alien species worldwide. It is the invasive alien species with the broadest distribution range in Uruguay, and its expansion is frequently associated with disturbances. Since natural grasslands are facing processes of productive intensification, C. dactylon represents a threat as it could displace native species. However, the mechanisms that explain its invasion success remain unclear. The objective of this study was to analyse interspecific interactions under low nutrient conditions between C. dactylon and two species that are native to the Campo grasslands in Uruguay. Specifically, we assessed differences in the components of competitive ability effects and responses (or tolerance) as possible mechanisms involved in C. dactylon invasiveness. We performed a greenhouse experiment in pots with low-nutrient substrate assessing pair-wise interactions between C. dactylon, Mnesithea selloana and Paspalum notatum plus control pots consisting of single individual of each species. The invasive species showed greater competitive ability than both native grasses, as it reduced their below and above-biomass. Conversely, the size of C. dactylon plants interacting with native species was similar to that of single C. dactylon plants growing alone (controls). This reveals that the greater competitive ability of the invasive species was due to a greater tolerance to grow with neighbouring plants. The reason underlying this tolerance was a marked increase in biomass allocation towards stolons and leaves, at the expense of roots. Conversely, native species barely changed their shoot-root allocation pattern when interacting with neighbours. Furthermore, C. dactylon induced reproductive development solely when interacting with neighbours. Along with the fact that the potential growth rate of the invasive and native species was quite similar, these results suggest that sensitive and rapidly triggered shade avoidance responses could be one mechanism involved in the invasion success of C. dactylon. © 2023 Ecological Society of Australia.
653 $aBiological invasions
653 $aCompetitive ability
653 $aMnesithea selloana
653 $aPaspalum notatum
653 $aUruguayan campo grasslands
700 1 $aGUIDO, A.
700 1 $aPEZZANI, F.
700 1 $aLATTANZI, F.
773 $tAustral Ecology, 2023. https://doi.org/10.1111/aec.13341
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INIA Las Brujas (LB) |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha actual : |
08/05/2019 |
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Actualizado : |
08/05/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
EGUREN, G.; RIVAS-RIVERA, N.; GARCIA, C.; BÖCKING, B.; BANDEIRA, S. |
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Afiliación : |
GABRIELA EGUREN, Universidad de la República (UdelaR)/ Facultad de Ciencias; NOELIA RIVAS-RIVERA, Universidad de la República (UdelaR)/ Facultad de Ciencias; CLAUDIO CESAR GARCIA GALLARRETA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; BERNARDO BÖCKING, Los Tordos S. en C.; SANTIAGO BANDEIRA, Los Tordos S. en C. |
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Título : |
Water quality index for agricultural systems in Northwest Uruguay. |
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Fecha de publicación : |
2018 |
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Fuente / Imprenta : |
Environmental Monitoring and Assessment, 2018, volume 190, Issue 12, page 710. |
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ISSN : |
0167-6369 |
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DOI : |
10.1007/s10661-018-7090-8 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received: 17 April 2018 // Accepted: 30 October 2018 // Published online: 10 November 2018. |
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Contenido : |
ABSTRACT.
Agricultural systems have experienced rapid expansion and intensification in the last several decades. In Uruguay, since the beginning of 2000, the most common cropping systems have included soybeans. Currently, this crop is expanding towards lowlands traditionally occupied by rice in rotation with pastures. However, the environmental effects of agricultural intensification and diversification are not well known. Thus, some indices have been proposed to quantify the changes in agricultural production systems and assess water quality. The main goal of this study was to develop a water quality index (WQI) to assess the impacts of the diversification of rice production systems in northwest Uruguay. The study was carried out in an agricultural basin where other summer crops have been incorporated in the rice-pasture sequence. Agriculture intensification and crop diversification indices were calculated using information provided by farmers. Water samples were collected downstream of the production area before crop sowing and after crop harvest (2008-2009 to 2010-2011 and 2016-2017 to 2017-2018). Biochemical oxygen demand, nitrates, total phosphorus, fecal coliforms, and total suspended solids were the variables that mainly explained the effects of the agricultural activities on water quality. The proposed water quality index included these unweighted variables, which allowed for the pre-sowing and post-harvest to be differentiated, as well as the degree of diversification. Therefore, the proposed WQI constitutes a tool that can be used to evaluate the water quality in an agricultural basin. Likewise, it can be used to select agricultural sequences that generate the least possible impacts on the associated water resources.
© Springer Nature Switzerland AG 2018 MenosABSTRACT.
Agricultural systems have experienced rapid expansion and intensification in the last several decades. In Uruguay, since the beginning of 2000, the most common cropping systems have included soybeans. Currently, this crop is expanding towards lowlands traditionally occupied by rice in rotation with pastures. However, the environmental effects of agricultural intensification and diversification are not well known. Thus, some indices have been proposed to quantify the changes in agricultural production systems and assess water quality. The main goal of this study was to develop a water quality index (WQI) to assess the impacts of the diversification of rice production systems in northwest Uruguay. The study was carried out in an agricultural basin where other summer crops have been incorporated in the rice-pasture sequence. Agriculture intensification and crop diversification indices were calculated using information provided by farmers. Water samples were collected downstream of the production area before crop sowing and after crop harvest (2008-2009 to 2010-2011 and 2016-2017 to 2017-2018). Biochemical oxygen demand, nitrates, total phosphorus, fecal coliforms, and total suspended solids were the variables that mainly explained the effects of the agricultural activities on water quality. The proposed water quality index included these unweighted variables, which allowed for the pre-sowing and post-harvest to be differentiated, as well as the degree of diversificati... Presentar Todo |
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Palabras claves : |
AGRICULTURAL SYSTEMS; AGRICULTURE INTENSIFICATION; CROP DIVERSIFICATION INDEX; URUGUAY; WATER QUALITY; WATER QUALITY INDEX. |
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Asunto categoría : |
P10 Recursos hídricos y su ordenación |
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Marc : |
LEADER 02713naa a2200277 a 4500
001 1059754
005 2019-05-08
008 2018 bl uuuu u00u1 u #d
022 $a0167-6369
024 7 $a10.1007/s10661-018-7090-8$2DOI
100 1 $aEGUREN, G.
245 $aWater quality index for agricultural systems in Northwest Uruguay.$h[electronic resource]
260 $c2018
500 $aArticle history: Received: 17 April 2018 // Accepted: 30 October 2018 // Published online: 10 November 2018.
520 $aABSTRACT. Agricultural systems have experienced rapid expansion and intensification in the last several decades. In Uruguay, since the beginning of 2000, the most common cropping systems have included soybeans. Currently, this crop is expanding towards lowlands traditionally occupied by rice in rotation with pastures. However, the environmental effects of agricultural intensification and diversification are not well known. Thus, some indices have been proposed to quantify the changes in agricultural production systems and assess water quality. The main goal of this study was to develop a water quality index (WQI) to assess the impacts of the diversification of rice production systems in northwest Uruguay. The study was carried out in an agricultural basin where other summer crops have been incorporated in the rice-pasture sequence. Agriculture intensification and crop diversification indices were calculated using information provided by farmers. Water samples were collected downstream of the production area before crop sowing and after crop harvest (2008-2009 to 2010-2011 and 2016-2017 to 2017-2018). Biochemical oxygen demand, nitrates, total phosphorus, fecal coliforms, and total suspended solids were the variables that mainly explained the effects of the agricultural activities on water quality. The proposed water quality index included these unweighted variables, which allowed for the pre-sowing and post-harvest to be differentiated, as well as the degree of diversification. Therefore, the proposed WQI constitutes a tool that can be used to evaluate the water quality in an agricultural basin. Likewise, it can be used to select agricultural sequences that generate the least possible impacts on the associated water resources. © Springer Nature Switzerland AG 2018
653 $aAGRICULTURAL SYSTEMS
653 $aAGRICULTURE INTENSIFICATION
653 $aCROP DIVERSIFICATION INDEX
653 $aURUGUAY
653 $aWATER QUALITY
653 $aWATER QUALITY INDEX
700 1 $aRIVAS-RIVERA, N.
700 1 $aGARCIA, C.
700 1 $aBÖCKING, B.
700 1 $aBANDEIRA, S.
773 $tEnvironmental Monitoring and Assessment, 2018, volume 190, Issue 12, page 710.
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