Recent Snowy Plover population increase arises from high immigration rate in coastal northern California

Colwell, Mark A.; Feucht, Elizabeth J.; Lau, Matt J.; Orluck, D. J.; McAllister, S. E.; Transou, Amber N.

doi:10.18194/ws.00053

Cited by 4 publications

(11 citation statements)

References 27 publications

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“…Our 12-year study showed that plovers nested in an aggregated pattern in most years; the one exception was the year when the population declined to its lowest point (Colwell et al 2017). Model results showed that population size was the strongest predictor of the aggregated pattern.…”

Section: Spatial and Temporal Variationmentioning

confidence: 69%

“…Observers monitored broods in a similar manner by relocating broods tended by adults until we determined that young had either fledged or failed to survive to 28 days. Colwell et al (2010Colwell et al ( , 2017 provide details on field methods. We conducted research under permits (USFWS permit TE-823807-3, USFWS Federal banding permit #22971, California Department of Fish and Wildlife collecting permit #801059-03, State Parks collecting permit #09-635-002, Humboldt State University IACUC #11/12.W.12-A).…”

Section: Field Methodsmentioning

confidence: 99%

“…Since then, the population has increased to the number (72 adults) present early in our study. However, no plovers have bred in these high quality gravel substrates since their local extirpation in 2011 (Colwell et al 2017). Finally, while acknowledging the effect of habitat quality in the dispersion pattern, our analysis was conducted at the level of the population, with each year a datum.…”

Section: Spatial and Temporal Variationmentioning

confidence: 99%

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Annual variation in distance to nearest neighbor nest decreases with population size in snowy plovers

Patrick¹,

Colwell²

2018

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Section: Spatial and Temporal Variationmentioning

confidence: 69%

Section: Field Methodsmentioning

confidence: 99%

Section: Spatial and Temporal Variationmentioning

confidence: 99%

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Annual variation in distance to nearest neighbor nest decreases with population size in snowy plovers

Patrick¹,

Colwell²

2018

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“…We have monitored a color-marked population of Snowy Plovers since 2001 in coastal northern California (see Colwell et al 2017a), which constitutes one of six recovery units designated in the species' recovery plan (USFWS 2007). Our most intensive monitoring has occurred along ~100 km of ocean-fronting beaches (80 km) and riverine gravel bars (15 km) in Humboldt County, where plovers have bred in loose aggregations (as gauged by distance to nearest conspecific nest) that vary inversely with population size (Patrick & Colwell 2018).…”

Section: Study Areamentioning

confidence: 99%

“…As such, BE varies between 0.0 and 1.0, corresponding to situations in which no and all chicks fledge, respectively, from the number of eggs laid. Here, we further develop this metric using 18 years of data from an intensively monitored population of individually marked Snowy Plovers (Colwell et al 2017a), and apply it to habitats and populations.…”

Section: Introductionmentioning

confidence: 99%

Breeding efficiency: a metric for assessing habitat quality and individual performance?

Colwell¹,

Raby²,

Feucht³

2018

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Population differentiation and historical demography of the threatened snowy plover Charadrius nivosus (Cassin, 1858)

et al. 2020

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Delineating conservation units is a complex and often controversial process that is particularly challenging for highly vagile species. Here, we reassess population genetic structure and identify those populations of highest conservation value in the threatened snowy plover (Charadrius nivosus, Cassin, 1858), a partial migrant shorebird endemic to the Americas. We use four categories of genetic data-mitochondrial DNA (mtDNA), microsatellites, Z-linked and autosomal single nucleotide polymorphisms (SNPs)-to: (1) assess subspecies delineation and examine population structure (2) compare the sensitivity of the different types of genetic data to detect spatial genetic patterns, and (3) reconstruct demographic history of the populations analysed. Delineation of two traditionally recognised subspecies was broadly supported by all data. In addition, microsatellite and SNPs but not mtDNA supported the recognition of Caribbean snowy plovers (C. n. tenuirostris) and Floridian populations (eastern C. n. nivosus) as distinct genetic lineage and deme, respectively. Low migration rates estimated from autosomal SNPs (m < 0.03) reflect a general paucity of exchange between genetic lineages. In contrast, we detected strong unidirectional migration (m = 0.26) from the western into the eastern nivosus deme. Within western nivosus, we found no genetic differentiation between coastal Pacific and inland populations. The correlation between geographic and genetic distances was weak but significant for all genetic data sets. All demes showed signatures of bottlenecks occurring during the past 1000 years. We conclude that at least four snowy plover conservation units are warranted: in addition to subspecies nivosus and occidentalis, a third unit comprises the Caribbean tenuirostris lineage and a fourth unit the distinct eastern nivosus deme.

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Recent Snowy Plover population increase arises from high immigration rate in coastal northern California

Cited by 4 publications

References 27 publications

Annual variation in distance to nearest neighbor nest decreases with population size in snowy plovers

Annual variation in distance to nearest neighbor nest decreases with population size in snowy plovers

Breeding efficiency: a metric for assessing habitat quality and individual performance?

Population differentiation and historical demography of the threatened snowy plover Charadrius nivosus (Cassin, 1858)

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