Floristic composition and agricultural importance of weeds in southern Spain

Salvá, A. Pujadas; Bermejo, J. Esteban Hernández

doi:10.1111/j.1365-3180.1988.tb01603.x

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…Extensive agricultural landscapes in the Iberian Peninsula tend to present high floristic diversity (Chamorro et al, ; Salvá & Hernández‐Bermejo, ). However, increasing productivity in arable systems is generally associated with the simplification of crop varieties; high use of fertilizers; and the application of intensive methods for weed control, such as high tillage frequency or use of herbicides and seed‐clearing (Benton et al, ; Emmerson et al, ; Robinson & Sutherland, ).…”

Section: Discussionmentioning

confidence: 99%

Abundance of weeds and seeds but not of arthropods differs between arable habitats in an extensive Mediterranean farming system

Tarjuelo

Morales

Arribas

et al. 2019

Ecological Research

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Agricultural intensification has profoundly affected European farmlands in the last decades, and their associated biodiversity has undergone a widespread decline. Although largely considered by farmers to be a threat to crop productivity, weeds and arthropods are key factors in farmland ecosystems and provide multiple ecosystem services. We analyze variations between three arable habitats—cereals, plowed and fallow fields—in the biomass of weeds, seeds and arthropods in an extensive rotation system of Central Spain. We also investigate the effect of the vegetation structure in the overall biomass of arthropods and that of the most abundant orders found, Coleoptera and Orthoptera, which constitute key resources for many declining farmland birds. Our results show that fallows had the greatest biomass of weeds and seeds, whereas no differences were found between cereal and plowed fields. Although vegetation structure was related to the biomass of total arthropods, as well as that of coleopterans and orthopterans of a large size, arthropod biomass did not vary between the three arable habitats. Overall, higher weed cover and denser vegetation favored higher biomass of arthropods. Our results suggest a process of ecological homogenization, where arthropod populations may be suffering a widespread decline across habitat types, likely due to high tillage frequency or agrochemical use, despite the extensive rotation system and the mosaic landscape of our study site. Short‐ and mid‐term fallows might function as a source habitat for weeds and arthropods, although this role might be compromised by their progressive disappearance and isolation within the landscape.

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Section: Discussionmentioning

confidence: 99%

Abundance of weeds and seeds but not of arthropods differs between arable habitats in an extensive Mediterranean farming system

Tarjuelo

Morales

Arribas

et al. 2019

Ecological Research

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“…Nos países da Europa e da América do Norte, levantamentos florísticos e caraterizações de comunidades daninhas vêm sendo desenvolvidos, podendo-se mencionar o trabalho de Streibig (1979), que discorreu sobre a importância de estudos quantitativos na análise de aspectos ecológicos e fitossociológicos, assim como os trabalhos de Chancellor (1985), Dale & Thomas (1987), Salvá & Bermejo (1988) que, através de métodos quantitativos evidenciaram uma série de correlações entre plantas daninhas e características do solo, do clima e das formas de manejo das culturas onde elas ocorrem. O conhecimento da comunidade de plantas daninhas tem importância fundamental na tomada de decisão referente a práticas de manejo e controle, nas mais diversas formas de cultivo, como tem sido evidenciado pelos trabalhos de Weber et al (1995), Bárberi et al (1997) e Stevenson et al (1997).…”

Section: Introductionunclassified

Composição florística e estrutura da comunidade de plantas do estrato herbáceo em áreas de cultivo de árvores frutíferas

Yanagizawa

Maimoni-Rodella

1999

Planta daninha

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O objetivo do presente trabalho foi caracterizar, em três épocas, a comunidade de plantas presentes em áreas de cultivo de abacateiro e de nogueira pecan, localizadas na Fazenda Experimental Lageado, da FCA-UNESP, município de Botucatu-SP. Em decorrência da arquitetura da copa e do caráter decíduo das nogueiras, esta área apresenta-se mais ensolarada, o que produz condições ambientais diferentes entre as duas áreas estudadas. Foi estabelecida uma grade retangular composta de 55 parcelas quadradas, contíguas, com 5 m de lado, havendo 40 parcelas sob os abacateiros e 15 sob as nogueiras. As coletas foram realizadas em março, maio e agosto de 1993, quando foram sorteados quadrados de 1x 1 m em cada parcela, de forma a não haver coincidência entre as amostragens realizadas em cada época. Foram levantadas as espécies ocorrentes, sua porcentagem de cobertura e freqüência. Os dados foram analisados através de métodos multivariados, utilizando-se a Análise de Agrupamento para as seis situações (3 épocas x 2 ambientes). Foram coletadas, no total, 54 espécies, distribuídas em 38 gêneros e 19 famílias, sendo Asteraceae e Poaceae as que contribuíram com o maior número de espécies. A riqueza em espécies foi maior na área sob as nogueiras; em ambas as áreas, a riqueza foi maior na estação úmida. Sob os abacateiros, a porcentagem de cobertura total da comunidade apresentou pouca variação temporal, diferindo da área sob as nogueiras onde se observou flutuação deste parâmetro. O padrão de distribuição espacial, para quase todas as populações, foi do tipo agrupado. A similaridade florística foi maior entre as duas áreas dentro de cada época de coleta. A presença constante de espécies como Commelina nudiflora que contribuiu com valores elevados de cobertura nas três épocas de coleta, mostra a necessidade de utilizar métodos de controle permanentes na área do pomar estudado.

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Weed flora in arable fields of eastern Ethiopia with emphasis on the occurrence of Parthenium hysterophorus

2000

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An exploratory weed survey was carried out on 240 crop ®elds in eastern Ethiopia to assess the in¯uence of some environmental and crop management factors on weed species composition and distribution, and to investigate the association of the recently introduced Parthenium hysterophorus L. with other components of the weed¯ora. A total of 102 weed taxa belonging to 36 plant families were recorded. Asteraceae, Poaceae and Fabaceae were the most abundant families based on the number of species recorded. Digitaria abyssinica (Hochst. Ex A. Rich) Stapf was the most frequent species (63%) and Parthenium hysterophorus the second most frequent (54%). The latter species was ranked as the most important weed by 90% of the farmers in the lowlands while 86% of the farmers in the highlands ranked the former species as the worst weed. According to a partial canonical correspondence analysis (pCCA), altitude, rainfall, month of planting, number of weedings and soil type were the major environmental/crop management factors in¯uencing the species distribution in the study area. The ®rst pCCA axis clearly structured highland and lowland weed species while the second axis distinguished those species that grow on sandy soils. Parthenium hysterophorus has, in a very short time period, emerged as one of the most troublesome weed species in eastern Ethiopia.

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Floristic composition and agricultural importance of weeds in southern Spain

Cited by 7 publications

References 3 publications

Abundance of weeds and seeds but not of arthropods differs between arable habitats in an extensive Mediterranean farming system

Abundance of weeds and seeds but not of arthropods differs between arable habitats in an extensive Mediterranean farming system

Composição florística e estrutura da comunidade de plantas do estrato herbáceo em áreas de cultivo de árvores frutíferas

Weed flora in arable fields of eastern Ethiopia with emphasis on the occurrence of Parthenium hysterophorus

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