Weed seedbank and vegetation dynamics in summer crops under two contrasting tillage regimes

Tuesca, Daniel; Nisensohn, Luisa; Bocanelli, S.; Torres, Patricia Susana; Lewis, Phillip J.

doi:10.1556/comec.5.2004.2.12

Cited by 10 publications

(5 citation statements)

References 33 publications

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“…Golden spurge was found only in cotton-wheat system only under ZT. Indeed, weed seed bank composition, density and diversity are affected by cropping systems (Cardina et al, 2002;Tuesca et al, 2004;Murphy et al, 2006;Sosnoskie et al, 2006), due to which weed species vary in various tillage and cropping systems. Moreover, crop sequences create differences in resource competition, allelopathic interference, soil disturbance and mechanical damage to develop an unsuitable ecology for weeds which prevent the proliferation and dominance of any particular weed (Liebman and Dyck, 1993;Liebman and Davis, 2000), and may favor the proliferation and dominance of some other weed species (Ball, 1992).…”

Section: Discussionmentioning

confidence: 99%

Weed spectrum in different wheat-based cropping systems under conservation and conventional tillage practices in Punjab, Pakistan

Shahzad

Farooq

Hussain

2016

Soil and Tillage Research

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Section: Discussionmentioning

confidence: 99%

Weed spectrum in different wheat-based cropping systems under conservation and conventional tillage practices in Punjab, Pakistan

Shahzad

Farooq

Hussain

2016

Soil and Tillage Research

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“…The seeds were air dried, identified and counted under a dissecting microscope with 10x magnification. We only counted those seeds that remained intact after being gently pressed (Tuesca et al 2004). For each microsite, seed abundance and species richness were calculated and beta diversity was estimated as total richness divided by the average richness per sample.…”

Section: Methodsmentioning

confidence: 99%

Terrestrial bromeliads as seed accumulation microsites in a xerophytic forest of Southern Chaco, Argentina

2011

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Terrestrial bromeliads as seed accumulation microsites in a xerophytic forest of SouthernChaco, Argentina SUMMARYThe understory of the Schinopsis balansae forests of Southern Chaco is frequently covered by dense populations of two bromeliad species (Aechmea distichantha and Bromelia serra). These bromeliads usually act as traps capturing propagules and litter falling from the canopy. Some populations of these bromeliad species have been removed to ease cattle management, without considering their possible effects on forest regeneration. Therefore, the objective of this work was to evaluate the importance of both bromeliads as microsites for seed accumulation of woody and herbaceous species. Ten plots with bromeliads were selected, where one soil sample and one plant of each species were taken. From the material collected among bromeliad leaves, the seeds and propagules were separated. Likewise, soil samples were washed and the seeds were separated from the litter collected. Seeds were determined to morphospecies and counted. There were 352 seeds (230 on bromeliads and 122 in the soil) from 48 species (10 woody and 38 herbaceous species). Seed abundance of woody species was higher on bromeliad plants (70 seeds) than on the soil (six seeds). In contrast, a higher richness of herbaceous species was recorded on the soil. Therefore, both bromeliads seem to be important microsites for seed accumulation of woody species. However, it is not known whether bromeliads are a safe site for seedling establishment.Key words: bromeliads, Chaco, seeds, understory. RESUMENEl sotobosque de los quebrachales de Schinopsis balansae del Chaco Oriental está frecuentemente cubierto por densas poblaciones de dos bromeliáceas terrestres (Aechmea distichantha y Bromelia serra). Estas bromeliáceas actúan como trampas que capturan propágulos y hojarasca que cae desde la copa de los árboles. Estas poblaciones son a veces removidas para facilitar el manejo del ganado, sin considerar los posibles efectos sobre la regeneración del bosque. El objetivo de este trabajo fue evaluar la importancia de ambas bromeliáceas como micrositios para la acumulación de semillas de especies leñosas y herbáceas. En diez áreas con bromeliáceas, se tomó una muestra de suelo y una planta de cada especie. Se procesó el material colectado entre las hojas de las bromeliáceas, separando las semillas. Además, se lavaron las muestras de suelo, separando las semillas de la hojarasca colectada. Las semillas fueron determinadas al nivel de morfoespecie y contadas. Se registraron 352 semillas (230 sobre bromeliáceas y 122 en el suelo) de 48 especies (10 leñosas y 38 herbáceas). Las semillas de leñosas fueron más abundantes en las plantas de bromeliáceas (70 semillas) que en el suelo (seis semillas). Por el contrario, se registró una mayor riqueza de especies herbáceas en el suelo. Por consiguiente, ambas bromeliáceas parecen ser importantes micrositios para la acumulación de semillas de leñosas. Sin embargo, no se sabe si las bromeliáceas constituyen un micrositio propicio p...

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“…Thus, this question would be worth studying regarding both for species with different seed morphology and for soil types with different texture. Of course, it does not apply to cultivated soils, and in agricultural fields sampling time depends principally on the crop rotation cycle of the given area (Tuesca et al 2004). …”

Section: Timing Of Samplingmentioning

confidence: 99%

Seed banks: ecological definitions and sampling considerations

Csontos¹

2007

Community Ecology

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Weed seedbank and vegetation dynamics in summer crops under two contrasting tillage regimes

Cited by 10 publications

References 33 publications

Weed spectrum in different wheat-based cropping systems under conservation and conventional tillage practices in Punjab, Pakistan

Weed spectrum in different wheat-based cropping systems under conservation and conventional tillage practices in Punjab, Pakistan

Terrestrial bromeliads as seed accumulation microsites in a xerophytic forest of Southern Chaco, Argentina

Seed banks: ecological definitions and sampling considerations

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