Density‐dependent survival and recruitment in a long‐distance <scp>P</scp>alaearctic migrant, the <scp>S</scp>and <scp>M</scp>artin <i><scp>R</scp>iparia riparia</i>

Norman, David; Peach, Will J.

doi:10.1111/ibi.12036

Cited by 29 publications

(39 citation statements)

References 40 publications

(83 reference statements)

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“…, Smith et al. ), as documented in a variety of both migratory and non‐migratory species of birds (Dhondt , Norman and Peach ). Additional evidence comes from removal experiments with wintering birds (Marra et al.…”

Section: Discussionmentioning

confidence: 96%

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Dietary opportunism, resource partitioning, and consumption of coffee berry borers by five species of migratory wood warblers (Parulidae) wintering in Jamaican shade coffee plantations

et al. 2016

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Diets reflect important ecological interactions, but are challenging to quantify for foliage‐gleaning birds. We used regurgitated stomach samples from five primarily insectivorous species of long‐distance migrant warblers (Parulidae) wintering in two moderate‐elevation shade coffee farms in Jamaica to assess both foraging opportunism and prey resource partitioning. Our results, based primarily on 6120 prey items in 80 stomach samples collected during a one‐week period in March 2000, confirm opportunism. The diets of all five warblers, including American Redstarts (Setophaga ruticilla), Black‐and‐White Warblers (Mniotilta varia), Black‐throated Blue Warblers (S. caerulescens), Northern Parulas (S. americana), and Prairie Warblers (S. discolor), overlapped strongly based on consumption of the same prey types, even many of the same prey species (4 of 10 interspecific overlaps >0.9, range = 0.74–0.97). Moreover, all five species fed on similarly small, often patchily distributed prey, including coffee berry borers (Hypothenemus hampei; Coleoptera, Curculionidae). Nonetheless, permutational multivariate analysis of variance also revealed that the diets of these species differed significantly, primarily with respect to prey mobility (winged vs. sessile); American Redstarts fed on the most mobile prey, and Northern Parulas on the least mobile prey and a relatively restricted set of prey taxa compared to the other four species of warblers. Overall, our results suggest both dietary opportunism consistent with a migratory life‐history, and interspecific resource partitioning consistent with differences in morphology and foraging behavior during a food‐limited season. Having provided evidence of the three necessary conditions, namely intraspecific competition, resource limitation, and interspecific overlap in resource use, the results of our study, in combination with those of other studies, also provide evidence of interspecific competition among wintering migrant insectivores. We thus argue that diffuse interspecific exploitative food competition may be more important than previously recognized.

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Section: Discussionmentioning

confidence: 96%

“…, Strong and Sherry , Sherry et al. , Norman and Peach ) and experimentation (Studds and Marra , Brown and Sherry , Smith et al. , Cooper et al.…”

Section: Migratory Bird Species Foraging In Jamaican Shade Coffee Plamentioning

confidence: 99%

Dietary opportunism, resource partitioning, and consumption of coffee berry borers by five species of migratory wood warblers (Parulidae) wintering in Jamaican shade coffee plantations

et al. 2016

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“…Breeding performance declined substantially for Bank Swallows and is likely contributing to population declines; however, for the other three swallows, performance is unchanged or higher. For example, adult survival in Afro-Palearctic populations of Bank and Barn Swallows is closely related to precipitation during the winter (Cowley and Siriwardena 2005, Robinson et al 2008, Norman and Peach 2013. An inability to advance breeding phenology for Bank Swallows might contribute to their lower breeding performance.…”

Section: Discussionmentioning

confidence: 99%

Breeding phenology and performance for four swallows over 57 years: relationships with temperature and precipitation

et al. 2018

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Climate change can drive population declines for many species, often through changes to their food supply. These changes can involve a mis-timing between periods of high food demand and peak food availability, typically from advances in breeding phenology, and/or an overall reduction in food availability. Aerial insectivores, birds that feed on insects caught in flight, are experiencing steep population declines possibly because of shifts in the timing and/or abundance of aerial insects. We determined whether changes in breeding performance over time could account for declines in Bank Riparia riparia, Barn Hirundo rustica, Cliff Petrochelidon pyrrhonota, and Tree Tachycineta bicolor Swallows, and if so, whether changes were related to shifts in breeding phenology and/or climate change. We compared breeding performance and phenology in Maritime Canada before (1962)(1963)(1964)(1965)(1966)(1967)(1968)(1969)(1970)(1971)(1972) and after (2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016) the onset of steep population declines during the mid-1980s, to determine whether breeding performance was reduced or phenology was advanced. Then, we modeled relationships between temperature, precipitation, breeding phenology, and performance for Barn and Tree Swallows, the only species with sufficient data, from 1960 to 2016, to determine whether phenology and performance were related to climatic conditions. Between the two time periods, we found significantly lower performance in Bank Swallows, higher performance in Barn and Tree Swallows, and unchanged performance in Cliff Swallows. We also found clutch initiation dates advanced by 8-10 d for all species except Bank Swallows. On the breeding grounds, warmer winter temperatures for Tree Swallows and less winter precipitation for Barn and Tree Swallows in a given year were associated with earlier breeding, and for Tree Swallows, changes in nestling survival. Otherwise, Barn and Tree Swallow breeding performance was unaffected by winter temperature and precipitation. Our results suggest that in this region poorer breeding performance could contribute to population declines for Bank Swallows but not for the other three species.

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“…Demographic properties, such as population density may also affect host fitness (Begon et al ). Substantial negative density‐dependent effects on survival have been detected as population size increases (Arcese et al , Norman and Peach ). High population density is also expected to be positively related to the transmission rate of certain parasites (Tompkins et al ).…”

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confidence: 99%

Lower survival probability of house sparrows severely infected by the gapeworm parasite

Holand

Jensen

Tufto

et al. 2014

Journal of Avian Biology

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18The effect of parasites in natural populations has received increasing attention in recent years. 19Studies have shown that parasites may play an important part in population ecology due to 20 their potential effects on host fitness. The main purpose of the present study was to 21 investigate the effect of a nematode parasite (gapeworm, Syngamus trachea) on survival 22 probability of house sparrows (Passer domesticus) from six natural populations located on 4 23 islands in the Helgeland archipelago in northern Norway. Infection status was obtained from 24 feces samples collected from 603 house sparrows in the summer and autumn of 2007 -2011. 25 We also collected data on a visible symptom of severe infection (gasping for air) in 1391 26 house sparrows in the summer and autumn 2004-2011. We took advantage of recent advances 27 in disease modeling in a multievent capture-mark-recapture framework to account for 28 imperfect observations (state uncertainty). Each dataset was separately analyzed, in both 29 analyses the relationships of year, island, individual body condition, age class and population 30 density with survival probabilities. The relationship between infection (determined by feces 31 egg counts) on annual survival of house sparrows was not statistically significant. However, 32 the probability of annual survival was found to be significantly lower for adult house 33 sparrows exhibiting a symptom of severe gapeworm infection, gasping for air. The present 34 study demonstrates that severe infection by a parasite can have a negative relationship with 35 survival probability of short lived avian hosts in wild populations. 36 37

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Density‐dependent survival and recruitment in a long‐distance Palaearctic migrant, the Sand Martin Riparia riparia

Cited by 29 publications

References 40 publications

Dietary opportunism, resource partitioning, and consumption of coffee berry borers by five species of migratory wood warblers (Parulidae) wintering in Jamaican shade coffee plantations

Dietary opportunism, resource partitioning, and consumption of coffee berry borers by five species of migratory wood warblers (Parulidae) wintering in Jamaican shade coffee plantations

Breeding phenology and performance for four swallows over 57 years: relationships with temperature and precipitation

Lower survival probability of house sparrows severely infected by the gapeworm parasite

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