First nest description of the Iberá Seedeater (Sporophila iberaensis)

Turbek, Sheela P.; Browne, Melanie; Pasian, Constanza; Giacomo, Adrián S. Di

doi:10.1676/17-35

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…1E), breeding synchronously (fig. S12), and foraging together on the same grasses (24). In addition to male plumage patterning, capuchinos differ in song (fig.…”

Section: Species Discrimination Is Based On Plumage and Song Traitsmentioning

confidence: 99%

“…S. collaris breeds in sympatry and occupies a very similar ecological niche to S. hypoxantha and S. iberaensis (77,78). The heterospecific control treatment thus attempts to discriminate between aggressive responses to ecological and sexual competitors, given that all three species are grassland birds that feed on the seeds of tall grasses, such as Paspalum durifolium (Poaceae) and Andropogon lateralis (Poaceae), which dominate the landscape in the San Nicolás Reserve (24,79). In particular, an elevated response to conspecific traits relative to the stimuli of the heterospecific capuchino and control would indicate that (i) capuchinos recognize members of their own species as sexual competitors, and (ii) the conspecific traits that elicit an elevated response are involved in male-male competition and potentially female choice (73)(74)(75).…”

Section: Behavioral Experimentsmentioning

confidence: 99%

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Rapid speciation via the evolution of pre-mating isolation in the Iberá Seedeater

Turbek

Browne

Giacomo

et al. 2021

Science

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Behavioral isolation can catalyze speciation and permit the slow accumulation of additional reproductive barriers between co-occurring organisms. We illustrate how this process occurs by examining the genomic and behavioral bases of pre-mating isolation between two bird species (Sporophila hypoxantha and the recently discovered S. iberaensis) that belong to the southern capuchino seedeaters, a recent, rapid radiation characterized by variation in male plumage coloration and song. Although these two species co-occur without obvious ecological barriers to reproduction, we document behaviors indicating species recognition by song and plumage traits and strong assortative mating associated with genomic regions underlying male plumage patterning. Plumage differentiation likely originated through the reassembly of standing genetic variation, indicating how novel sexual signals may quickly arise and maintain species boundaries.

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“…1E), breeding synchronously (fig. S12), and foraging together on the same grasses (24). In addition to male plumage patterning, capuchinos differ in song (fig.…”

Section: Species Discrimination Is Based On Plumage and Song Traitsmentioning

confidence: 99%

Section: Behavioral Experimentsmentioning

confidence: 99%

Rapid speciation via the evolution of pre-mating isolation in the Iberá Seedeater

Turbek

Browne

Giacomo

et al. 2021

Science

Self Cite

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“…Seedeaters Sporophila spp. are harvested as pets and many consequently have Endangered status (Turbek et al 2019).…”

Section: South America (53 Studies)mentioning

confidence: 99%

A global review identifies agriculture as the main threat to declining grassland birds

Douglas,

Waldinger,

Buckmire

et al. 2023

Ibis

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Grasslands are globally threatened and their biodiversity, including grassland birds, is declining markedly. To inform grassland bird conservation globally, we systematically reviewed threats and conservation actions for grassland birds, extracting data from 528 papers. Across the 10 primary grassland regions of the globe, agriculture was the most frequently or joint most frequently reported threat in nine regions (reported as a threat in 73% of publications); hunting was the most frequently reported threat in the remaining region. Natural system modifications (reported as a threat in 32% of publications) and climate change and severe weather (24%) were less frequently reported threats compared with agriculture. The types of threat from agriculture varied regionally, but the most pervasive were livestock farming and ranching (reported in 58% of publications where agriculture was a primary threat) and non‐timber cropping (43%). Most agricultural threats relate to intensification, but agricultural abandonment, typically the cessation of grazing, sometimes accompanied by tree planting/succession, poses an emerging threat to some grassland birds (reported in 32% of publications where agriculture was a primary threat). The most frequent conservation actions implemented to date include land/water management and protection, and species‐specific management actions. Authors of reviewed publications in almost all regions recommend more land/water management, followed by calls for further land/water protection. The parlous state of grassland birds globally suggests that existing conservation actions for grasslands are inadequate. Furthermore, our review suggests that these should be primarily targeted at reversing the negative impacts of agriculture, in particular livestock farming and cropping.

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Timing of breeding as a determinant of nest success of the vulnerable Chestnut Seedeater (Sporophila cinnamomea) in grasslands of southern South America

Rosoni¹,

Fontana²,

Carlos³

2023

Avian Research

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First nest description of the Iberá Seedeater (Sporophila iberaensis)

Cited by 8 publications

References 13 publications

Rapid speciation via the evolution of pre-mating isolation in the Iberá Seedeater

Rapid speciation via the evolution of pre-mating isolation in the Iberá Seedeater

A global review identifies agriculture as the main threat to declining grassland birds

Timing of breeding as a determinant of nest success of the vulnerable Chestnut Seedeater (Sporophila cinnamomea) in grasslands of southern South America

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