Suitability of arable weeds as indicator organisms to evaluate species conservation effects of management in agricultural ecosystems

Albrecht, Harald

doi:10.1016/s0167-8809(03)00081-1

Cited by 90 publications

(58 citation statements)

References 13 publications

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“…Benton et al (2003) highlighted the importance of differential seed or edaphic factors contributing distinctly to plant growth and to patchiness in the presence of insects. Similarly, Albrecht and Mattheis (1998) found that a management change from conventional to integrated farming in dicotyledonous crops in Germany did not lead to a substantial increment of the number of rare species in spontaneous grass cover. Hyvönen and Huusela-Veistola (2008) described that differences in spontaneous grass cover species numbers between organically and conventionally cropped fields in Finland were small.…”

Section: Discussionmentioning

confidence: 95%

“…Although single steps, such as the application of fertilizers or certain herbicides, may lead to the dominance of some species such as in the case of monocotyledonous in CN (Table 5), no clear sensitivity to the management was found, as described by Albrecht (2003) in Germany or Pysek et al (2005) in central Europe for different crops. This is likely to be a result of the site conditions in CN being substantially better for vegetation growth, which becomes evident given the olive yields at both catchments (CN, 5000-8000 kg ha −1 , and PG < 2000 kg ha −1 ).…”

Section: Discussionmentioning

confidence: 99%

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Exploring the linkage between spontaneous grass cover biodiversity and soil degradation in two olive orchard microcatchments with contrasting environmental and management conditions

Taguas

Arroyo

Lora

et al. 2015

SOIL

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Abstract. Spontaneous grass covers are an inexpensive soil erosion control measure in olive orchards. Olive farmers allow grass to grow on sloping terrain to comply with the basic environmental standards derived from the Common Agricultural Policy (CAP, European Commission). However, to date there are few studies assessing the environmental quality considering such covers. In this study, we measured biodiversity indices for spontaneous grass cover in two olive orchards with contrasting site conditions and management regimes in order to evaluate the potential for biodiversity metrics to serve as an indicator of soil degradation. In addition, the differences and temporal variability of biodiversity indicators and their relationships with environmental factors such as soil type and properties, precipitation, topography and soil management were analysed.Different grass cover biodiversity indices were evaluated in two olive orchard catchments under conventional tillage and no tillage with grass cover, during 3 hydrological years (2011)(2012)(2013). Seasonal samples of vegetal material and photographs in a permanent grid (4 samples ha −1 ) were taken to characterize the temporal variations of the number of species, frequency of life forms, diversity and modified Shannon and Pielou indices.Sorensen's index showed strong differences in species composition for the grass covers in the two olive orchard catchments, which are probably linked to the different site conditions. The catchment (CN) with the best site conditions (deeper soil and higher precipitation) and most intense management presented the highest biodiversity indices as well as the highest soil losses (over 10 t ha −1 ). In absolute terms, the diversity indices of vegetation were reasonably high for agricultural systems in both catchments, despite the fact that management activities usually severely limit the landscape and the variety of species. Finally, a significantly higher content of organic matter in the first 10 cm of soil was found in the catchment with worse site conditions in terms of water deficit, average annual soil losses of 2 t ha −1 and the least intense management. Therefore, the biodiversity indices considered in this study to evaluate spontaneous grass cover were not found to be suitable for describing the soil degradation in the study catchments.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Exploring the linkage between spontaneous grass cover biodiversity and soil degradation in two olive orchard microcatchments with contrasting environmental and management conditions

Taguas

Arroyo

Lora

et al. 2015

SOIL

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“…The frequency of rare weeds in arable land plant communities represents an indicator of their ecological sustainability (Benvenuti and Macchia 2003;Albrecht 2003;Gabriel and Tscharntke 2007). This is particularly true for insectpollinated species, since their presence presupposes a level of biodiversity that extends to the animal kingdom (Levin 1971;Holzschuh et al 2006;Nicholls and Altieri 2012).…”

Section: Do Generalist Insect Pollinators Serve Weeds Better? Not Alwaysmentioning

confidence: 99%

Weed-insect pollinator networks as bio-indicators of ecological sustainability in agriculture. A review

Rollin¹,

Benelli

Benvenuti

et al. 2016

Agron. Sustain. Dev.

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The intensification of agricultural practices contributes to the decline of many taxa such as insects and wild plants. Weeds are serious competitors for crop production and are thus controlled. Nonetheless, weeds enhance floral diversity in agricultural landscapes. Weeds provide food for insects in exchange for pollination. The stability of mutualistic interactions in pollination networks depends on conservation of insect pollinator and weed communities. Some agricultural practices can destabilize interactions and thus modify the stability of pollination networks. Therefore, more knowledge on weed-insect networks is needed. Here, we review the interactions involved in insect visits to weed flowers in temperate arable lands. Our main findings are that (1) weed pollination by insects has a key role in maintaining weed communities in arable lands; (2) weed-insect pollinator interactions are modulated by the flowers' features and their quality which are attracting insects; (3) most weeds are associated with generalist insect pollinators; and (4) even if weed-pollinator networks are largely mutualistic, some antagonist networks can be observed when deception occurs. We propose three weed-insect pollinator networks as potential bio-indicators to evaluate the ecological sustainability of arable land management strategies in temperate areas: (1) Geometridae and Bombyliidae species visiting Caryophyllaceae, (2) Papilionidae foraging on Apiaceae, and (3) Syrphidae visiting Asteraceae.

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“…The nature of fertilizer inputs, which differ in the rate of nutrient release, may also represent a potential filter during the assembly of weed communities (De Cauwer et al 2010). Hence, both herbicide application and fertilization may act as assembly filters that select against those species with less adapted traits (Albrecht 2003;Menalled et al 2001;Ryan et al 2010).…”

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confidence: 99%

Long-Term Management Affects the Community Composition of Arable Soil Seedbanks

et al. 2016

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The intensification of farming practices has reduced weed infestations, but it has also led to a reduction in weed diversity and changes in species composition. These effects are well described for aboveground flora; however, it is less clear how these effects might be expressed in the soil weed seedbank. We evaluated the effects of different long-term farm management strategies on the weed seedbank abundance, diversity, and community composition in the DOK (bioDynamic, bioOrganic, and Konventionell) field trial established in 1978 at Therwil, Switzerland. The trial compares biodynamic, organic, and conventional farming systems, which mainly differ in fertilization, weed control strategies, and pest control. The species richness and seed abundance of the weed seedbank were higher in the organic and biodynamic systems compared with the conventional ones. The different farming systems favored shifts in species assemblages, because specific management practices, such as herbicide application and type of fertilization, acted as filters that selected against certain species but promoted others that were more adapted.

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Suitability of arable weeds as indicator organisms to evaluate species conservation effects of management in agricultural ecosystems

Cited by 90 publications

References 13 publications

Exploring the linkage between spontaneous grass cover biodiversity and soil degradation in two olive orchard microcatchments with contrasting environmental and management conditions

Exploring the linkage between spontaneous grass cover biodiversity and soil degradation in two olive orchard microcatchments with contrasting environmental and management conditions

Weed-insect pollinator networks as bio-indicators of ecological sustainability in agriculture. A review

Long-Term Management Affects the Community Composition of Arable Soil Seedbanks

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