Density Dependent Double Brooding in Piping Plovers (<i>Charadrius melodus</i>) in the Norhern Great Plains, USA

Hunt, Kelsi L.; Dinan, Lauren R.; Friedrich, Meryl J.; Brown, Mary Bomberger; Jorgensen, Joel G.; Catlin, Daniel H.; Fraser, James D.

doi:10.1675/063.038.0409

Cited by 12 publications

(18 citation statements)

References 14 publications

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“…Though not carryover effects, these compensation effects are seasonal interactions and may interact with individual carryover effects in complex ways (Harrison et al, 2011). Density is an important determinant of reproductive output for plovers in our population (Catlin et al, 2014;Hunt, 2016;Hunt et al, 2015), and it may affect other factors in their life cycle. These seasonal compensation effects, however, are positively correlated with the level of migratory connectivity or geographic linkage among populations (Norris & Marra, 2007).…”

Section: Discussionmentioning

confidence: 99%

Senescence and carryover effects of reproductive performance influence migration, condition, and breeding propensity in a small shorebird

Weithman

Gibson

Hunt

et al. 2017

Ecology and Evolution

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Breeding propensity, the probability that an animal will attempt to breed each year, is perhaps the least understood demographic process influencing annual fecundity. Breeding propensity is ecologically complex, as associations among a variety of intrinsic and extrinsic factors may interact to affect an animal's breeding decisions. Individuals that opt not to breed can be more difficult to detect than breeders, which can (1) lead to difficulty in estimation of breeding propensity, and (2) bias other demographic parameters. We studied the effects of sex, age, and population reproductive success on the survival and breeding propensity of a migratory shorebird, the piping plover (Charadrius melodus), nesting on the Missouri River. We used a robust design Barker model to estimate true survival and breeding propensity and found survival decreased as birds aged and did so more quickly for males than females. Monthly survival during the breeding season was lower than during migration or the nonbreeding season. Males were less likely to skip breeding (range: 1–17%) than females (range: 3–26%; βsex = −0.21, 95% CI: −0.38 to −0.21), and both sexes were less likely to return to the breeding grounds following a year of high reproductive success. Birds that returned in a year following relatively high population‐wide reproductive output were in poorer condition than following a year with lower reproductive output. Younger adult birds and females were more likely to migrate from the breeding area earlier than older birds and males; however, all birds stayed on the breeding grounds longer when nest survival was low, presumably because of renesting attempts. Piping plovers used a variety of environmental and demographic cues to inform their reproduction, employing strategies that could maximize fitness on average. Our results support the “disposable soma” theory of aging and follow with predictions from life history theory, exhibiting the intimate connections among the core ecological concepts of senescence, carryover effects, and life history.

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Section: Discussionmentioning

confidence: 99%

Senescence and carryover effects of reproductive performance influence migration, condition, and breeding propensity in a small shorebird

Weithman

Gibson

Hunt

et al. 2017

Ecology and Evolution

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“…Non-breeding female plovers, however, would presumably not have a territory and thus would be more mobile. distance traveled between consecutive years and nests for plovers in this population was 153 m (Friedrich et al 2015). Many studies have affirmed the fidelity of plovers to locations across the annual cycle; fidelity of breeding birds to their populations (variously defined) across several studies was ≥83% and ≥46% for returning hatch year birds and appears to be relatively high for wintering birds as well (Gratto-Trevor et al 2016, Gibson et al 2018.…”

Section: Discussionmentioning

confidence: 69%

“…Previous studies have indicated that reproductive output (chick survival), site fidelity, and immigration rates are also density dependent in this population , Hunt et al 2015, 2018. Moreover, these birds were indirectly affected by density because at higher nest densities, fewer plovers bred, and non-breeding plovers had lower survival.…”

Section: Discussionmentioning

confidence: 83%

“…There also was, however, a large proportion of non-breeding adults from the flood years that returned to the breeding state in 2012 (Fig. As further evidence of a change in the social structure following the flood, double brooding (i.e., the production of a second clutch after fledging a first brood) is rare in plovers, but the rate increased substantially in 2012 when nesting densities were very low (Hunt et al 2015). We speculate that the relatively high level of transitions (i.e., breeding to non-breeding and vice versa) observed in the year following the flood may have resulted from a breakdown in their typical social structure.…”

Section: Discussionmentioning

confidence: 99%

“…These factors have been shown to affect plover reproduction (Catlin et al 2013, Hunt et al 2015, 2018 and movement , and each is a potential index to habitat limitation and thus population regulation. These factors have been shown to affect plover reproduction (Catlin et al 2013, Hunt et al 2015, 2018 and movement , and each is a potential index to habitat limitation and thus population regulation.…”

Section: Model Developmentmentioning

confidence: 99%

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Direct and indirect effects of nesting density on survival and breeding propensity of an endangered shorebird

et al. 2019

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2019.Direct and indirect effects of nesting density on survival and breeding propensity of an endangered shorebird.Abstract. Density-dependent regulation is a fundamental part of ecological theory and a significant driver of animal demography often through complex feedback loops. We investigated the relationship between floodand demographically induced fluctuations in density and the breeding propensity and survival of a pioneer species, the piping plover (plover, Charadrius melodus). We captured and marked adult and hatchling plovers on the Gavins Point Reach of the Missouri River in South Dakota and Nebraska, USA, from 2005 to 2014. In 2010 and 2011, historically high water levels and flooding inundated much of the plover's sandbar nesting habitat on the Missouri River. We developed a Bayesian formulation of a multievent model, or a multistate survival model with state uncertainty to estimate breeding propensity simultaneously with survival. Although plovers are conspicuous, their breeding status can be difficult to establish with certainty, which necessitated the use of uncertain states. With this model, we investigated the effect of sex, habitat availability, river flow, and density (birds/ha nesting habitat) on survival of hatch year and breeding and non-breeding adult plovers. In addition, we estimated the transition rates for these age classes between breeding and nonbreeding states. Non-breeding adults ( / AHY; n = 0.58 AE 0.06) had lower survival rates than breeding adults ( / AHY; b = 0.80 AE 0.04), and both breeding survival and breeding propensity decreased with increasing nesting density. Not only did survival and breeding propensity decrease directly at higher nest densities, but survival also was indirectly impacted by increasing the proportion of non-breeding birds with relatively low survival. Thus, plovers were regulated through a complex set of feedback loops, acting as densities increased. Our findings underscore the intricacy of density-dependent regulation and suggest that detailed demographic studies are needed to fully understand these effects.

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Reproductive ecology of interior least tern and piping plover in relation to Platte River hydrology and sandbar dynamics

Alexander

Jorgensen

Brown

2018

Ecology and Evolution

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In a recent study, Farnsworth et al. (2017) used distributions of nest initiation dates drawn mostly from human‐created, off‐channel habitats and a model of emergent sandbar habitat to evaluate the hypothesis that least terns (Sternula antillarum) and piping plovers (Charadrius melodus) are physiologically adapted to initiate nests concurrent with the cessation of spring river flow rises on two sections of the Platte River, Nebraska. The study by Farnsworth et al. (2017) has several shortcomings which bring into question the authors’ principal assertion that interior least tern and piping plovers are not adapted to occupying and nesting on river sandbars on the Platte River system. We identify these shortcomings and provide information, which, we suggest, would change their conclusions if incorporated. Linked Article: https://doi.org/10.1002/ece3.4097

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Density Dependent Double Brooding in Piping Plovers (Charadrius melodus) in the Norhern Great Plains, USA

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 12 publications

References 14 publications

Senescence and carryover effects of reproductive performance influence migration, condition, and breeding propensity in a small shorebird

Senescence and carryover effects of reproductive performance influence migration, condition, and breeding propensity in a small shorebird

Direct and indirect effects of nesting density on survival and breeding propensity of an endangered shorebird

Reproductive ecology of interior least tern and piping plover in relation to Platte River hydrology and sandbar dynamics

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