Use and Importance of Crop and Field-Margin Habitats for Birds in A Neotropical Agricultural Ecosystem

Giacomo, Adrián S. Di; Casenave, Javier Nestor Lopez de

doi:10.1525/cond.2010.090039

Cited by 31 publications

(26 citation statements)

References 47 publications

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“…Many species detected in our study use roadside vegetation either for breeding or foraging (Szpeiner et al 2007, Di Giacomo and Lopez de Casenave 2010, Cerezo et al 2011. Additionally, within pastoral landscapes temporary wetlands support greater abundances of wetland specialists such as the White-faced Ibis (Plegadis chihi) and Cattle Egret (Bubulcus ibis), which forage in the these zones as well as in grassland (see also Canevari et al 1991, Codesido et al 2012.…”

Section: Land-use Intensificationmentioning

confidence: 63%

“…During summer and autumn fields are covered with summer crops, mostly soybean, that have low vertical structure, and after harvest the land is used for winter crops, mostly wheat, resulting in exploitation year round (Viglizzo et al 2011). Likewise, intensive agricultural practices have reduced roadside vegetation, resulting in a serious loss of avian biodiversity (Szpeiner et al 2007, Di Giacomo and Lopez de Casenave 2010. Studies in Britain and northwestern Europe have pointed out that some generalists with greater habitat breadth are more tolerant of changing agricultural practicees (see Siriwardena et al 1998, Robinson andSutherland 2002).…”

Section: Land-use Intensificationmentioning

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 Intensificationmentioning

confidence: 63%

Section: Land-use Intensificationmentioning

confidence: 99%

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

2013

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“…487 million ha (FAO, ). Such crops also have negative effects on the associated biodiversity (Azman et al, ; Estrada, Coates‐Estrada, & Meritt, ; Newbold et al, ; Wilson et al, ) and usually are dominated by a few generalist bird species (Di Giacomo & López de Casenave, ). As happens with the productive lands assessed in this meta‐analysis, annual crops are also experiencing a rapid expansion on developing countries that hold a large biodiversity (e.g., Brazil, Argentina, and India are among the top 10 soybean producers in the world; FAO, ).…”

Section: Discussionmentioning

confidence: 99%

The effects of forestry and agroforestry plantations on bird diversity: A global synthesis

2019

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The increasing expansion of productive lands around the world during the last decades constitutes a strong driver of biodiversity loss, as they are usually established near to high diversity areas. Despite many studies that have compared bird diversity between natural and productive systems, a global synthesis is still missing and important for understanding how biodiversity is being altered. We conducted a meta‐analysis based on 144 case studies to assess the effects of four types of plantations (forestry, oil palm, coffee, and cacao) on bird species richness and abundance. We examined those effects in function of plantation type, latitudinal zone (temperate or tropical), geographical context (mainland or island), zoogeographic zone, and biodiversity hotspots. Plantations presented negative effects on both bird species richness and abundance. Oil palm plantations showed more negative effects followed by forestry plantations, whereas coffee and cacao agroforestry plantations had no significant effects. Those effects were geographically variable, being more pronounced in islands and temperate zones, as well as at the Oriental, Palearctic, and Neotropical zoogeograghic regions, and at the Sundaland and Mediterranean Basin biodiversity hotspots. Our results showed that productive systems reduce both species richness and abundance of bird species, being insular species particularly susceptible. Exotic monocultures with low structural heterogeneity (e.g., oil palm plantations) derive in highly impoverished bird communities dominated by generalist species. We identified South East Asia, tropical South America, and the Mediterranean Basin as the most threatened regions because of the sensitivity of their bird communities and the increasing rates of native forest replacement.

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“…But, there are almost no empirical field studies in Africa (Adams, Small, & Vickery, 2014;Wotton et al, 2017), and relatively few in the Neotropics (e.g. Di Giacomo & de Casenave, 2010;Frutos, Reales, Lorenzon, & Ronchi-Virgolini, 2016;Shaver et al, 2015), that monitor bird populations in agricultural habitats. Clearly, we need further research into how biodiversity is maintained, and how migrants survive, on agricultural land (e.g.…”

Section: Discussionmentioning

confidence: 99%

Local human population increase in the non‐breeding areas of long‐distance migrant bird species is only weakly associated with their declines, even for synanthropic species

Cresswell

Kazeh²,

Patchett

2019

Diversity and Distributions

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Aim To show how recent declines in populations of long‐distance migrant birds are associated with recent increases in human population growth and agricultural intensification on their tropical non‐breeding grounds, except for synanthropic species, where we expect the reverse. Location Breeding populations throughout Europe and North America spending the non‐breeding season throughout Africa, and Central and South America, respectively. Methods We mapped 50 species of long‐distance migrant birds from published tagging studies of 126 breeding populations and identified their breeding population trends from 2000 to 2015 from published Country or State census data. We then matched individual bird non‐breeding locations, from each population, to local human population change and crop yield data. We used GLMs to predict whether bird population decline was associated with human population change or crop yield and whether this was dependent on if a species was synanthropic or not, controlling for absolute human population density, breeding and non‐breeding location, migratory distance and phylogeny. We predicted that bird populations that spend the non‐breeding season in areas of recent higher human population increase or agricultural intensification (crop yield) would show greater declines, but that declines would be less for species that frequently utilize anthropogenic habitats such as secondary woodland and farmland. Results Bird population change, even for synanthropic species, showed a significant negative relationship with relative human population change and crop yield (but this was weak, <2% and 6% of variance respectively), and this relationship was the same for the Neotropics and Africa, despite African human population change being three times larger. Main conclusions The results suggest that local human population change in the non‐breeding area is likely to be only a relatively minor driver of migrant declines, and its effects may be through increases in agricultural intensification reducing carrying capacity, but we currently lack local studies to confirm this.

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Use and Importance of Crop and Field-Margin Habitats for Birds in A Neotropical Agricultural Ecosystem

Cited by 31 publications

References 47 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

The effects of forestry and agroforestry plantations on bird diversity: A global synthesis

Local human population increase in the non‐breeding areas of long‐distance migrant bird species is only weakly associated with their declines, even for synanthropic species

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