Patterns of bird abundance along the agricultural gradient of the Pampean region

Filloy, Julieta; Bellocq, M. Isabel

doi:10.1016/j.agee.2006.09.013

Cited by 65 publications

(66 citation statements)

References 13 publications

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“…In some cases, this pattern is likely to be related to requirements for foraging; for instance, granivorous birds such as the Wood Pigeon (Columba palumbus; see Inglis et al 1990) tend to be associated with annual crops, which habitat tends to be rich in seeds. In this regard, our results are in agreement with those of Filloy and Bellocq (2007), who also found that the abundance of the Grassland Sparrow (Ammodramus humeralis) is positively associated with the increase of croplands in the landscape of the Pampas. This granivorous species may fit successfully into high-intensity agriculture that provides abundant food such as cereal grains.…”

Section: Land-use Intensificationsupporting

confidence: 82%

“…Overall, the effect of agricultural intensification and homogenization of the landscape toward cropland on the avifauna of the Pampas of central Argentina will depend on the sensitivity and plasticity of each species (Fernández et al 2003, Filloy and Bellocq 2007, Pedrana et al 2008. In this study, we found that the abundance and richness of most specialized grassland birds have declined over large areas of the Pampas that have been converted to intensive crop production.…”

Section: Conservation Implicationsmentioning

confidence: 54%

“…Recent studies of the avifauna of central Argentina have shown that the population density of several species of birds decreased as the proportion of cropland in the landscape increased (Filloy and Bellocq 2007, Cerezo et al 2011. detected a reduction in distribution of grassland birds in association with land-use changes, in particular with the loss of grasslands and increase of crops.…”

Section: Introductionmentioning

confidence: 99%

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Landbird Assemblages in Different Agricultural Landscapes: A Case Study in the Pampas of Central Argentina

2013

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Abstract. A combination of elements (e.g., crops and pasture lands, strips of roadside vegetation, woodlots, temporary wetlands) increases the heterogeneity of rural landscapes. Agricultural landscapes range from homogeneous, dominated by a single element (i.e., pure cropland or pure pastoral farming) to heterogeneous, dominated by two or more elements (i.e., mixed farming). In this study we characterized landbird assemblages in various agricultural landscapes (cropland, pastoral, and mixed landscapes) in the Pampas of central Argentina, surveying along transects to quantify species richness, composition, and abundance. Mixed landscapes were more heterogeneous than pastoral areas and cropland. Species richness, particularly of generalists, was greater in mixed landscapes. Richness of grassland specialists (species of increased conservation concern in the Pampas) was lower in croplands than in pastoral and mixed landscapes. An indicator-species analysis supported the association of some grassland specialists (Rhea americana, Asthenes hudsoni, Embernagra platensis, Pseudoleistes virescens) with pastoral landscapes. Our results suggest that maintaining landscape heterogeneity throughout the Pampas (i.e., mixed landscapes) is important for preserving species richness of birds. But several threatened grassland specialists inhabiting the Pampas, such as Rhea americana and Asthenes hudsoni, are found exclusively in pastoral landscapes, so the long-term survival of these species will depend on the conservation of this landscape type.Key words: agroecosystem, grassland bird species, land use, matrix, Neotropical Region. Ensambles de Aves Terrestres en Diferentes Paisajes Rurales: Un Estudio de Caso en las Pampas del Centro de ArgentinaResumen. La combinación de elementos del paisaje (e.g., cultivos, pastizales, vegetación de bordes de caminos, arboledas y humedales temporarios) incrementa la heterogeneidad y define diferentes tipos de paisajes rurales, desde paisajes homogéneos dominados por un único elemento (i.e., paisaje de cultivo o ganadero) hasta paisajes heterogéneos dominados por dos o más elementos (i.e., paisajes mixtos). En este estudio caracterizamos los ensambles de aves terrestres en diferentes tipos de paisajes rurales de la Pampa argentina (paisajes de cultivos, ganaderos y mixtos). Las aves terrestres fueron muestreadas con transectas para determinar la riqueza de especies, la composición y la abundancia en cada tipo de paisaje rural. El paisaje mixto tuvo una mayor heterogeneidad que los paisajes de cultivos y ganaderos. El paisaje mixto tuvo una mayor riqueza de especies que los paisajes de cultivos y ganaderos, en especial de especies generalistas. Por otro lado, el paisaje de cultivos tuvo la menor riqueza de especialistas de pastizal (aquellas con problemas de conservación en la Pampa) que los paisajes ganaderos y mixtos. Un análisis de especies indicadoras destacó la asociación entre algunas especies de pastizal (Rhea americana, Asthenes hudsoni, Embernagra platensis, Pseudoleistes virescens) y el ...

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Section: Land-use Intensificationsupporting

confidence: 82%

Section: Conservation Implicationsmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

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Landbird Assemblages in Different Agricultural Landscapes: A Case Study in the Pampas of Central Argentina

2013

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“…Regional There are few studies regarding the impacts of these recent land use changes on biodiversity (but see Filloy andBellocq 2007, Codesido et al 2008a). Comparison of bird species distributions in the province of Buenos Aires between 1993 and 2006/07 reveal many changes in species distributions which are associated with recent land use changes (Fig.…”

Section: Eco-regionmentioning

confidence: 99%

Canada to Tierra del Fuego: species limits and historical biogeography of the Sedge Wren (Cistothorus platensis)

Robbins

Nyári

2014

The Wilson Journal of Ornithology

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“…The soybean is exported all over the world to a rapidly expanding market and is reputed to be a crop with very few risks. Since the 1990s, these multiple advantages have encouraged many farmers to specialize in this crop, which is becoming the pivot of rotations and is often sown every year on the same plots of land (Filloy and Bellocq 2007).…”

Section: Introductionmentioning

confidence: 99%

Tracking on-farm innovations to unearth alternatives to the dominant soybean-based system in the Argentinean Pampa

Salembier¹,

Elverdin²,

Meynard

2015

Agron. Sustain. Dev.

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Farming activities in the Argentinean Pampa have focused on soybean production since the 1990s. The resulting cropping systems may not be sustainable in the long run due to development of glyphosate-tolerant weeds, homogenization of landscape mosaics, and pollutions. Here, we used the tracking on-farm innovation method to produce resources for the design of alternatives. The five steps of tracking on-farm innovation were (1) characterization of the soybean-based dominant cropping system, (2) identification of producers developing alternative systems, (3) description of these cropping systems and their agronomic logic, which is the link between the producer practices and their motives when choosing these practices, (4) multicriteria assessment of the performances of the systems, and (5) analysis of the development conditions of the most efficient systems. We identified 22 alternative cropping systems developed by farmers. These systems all include original practices: diversification of crop rotations (22 cases), occasional return to tillage (15 cases), and low pesticide use (16 cases). Some alternative systems were more sustainable than the soybean-based system, as shown by lower economic risk level, better ability to maintain soil organic carbon content, and less glyphosate-tolerant weeds. Our results show overall that tracking on-farm innovations is an efficient method to get references on alternative cropping systems developed by farmers.

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Patterns of bird abundance along the agricultural gradient of the Pampean region

Cited by 65 publications

References 13 publications

Landbird Assemblages in Different Agricultural Landscapes: A Case Study in the Pampas of Central Argentina

Landbird Assemblages in Different Agricultural Landscapes: A Case Study in the Pampas of Central Argentina

Canada to Tierra del Fuego: species limits and historical biogeography of the Sedge Wren (Cistothorus platensis)

Tracking on-farm innovations to unearth alternatives to the dominant soybean-based system in the Argentinean Pampa

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