Wood Stork (Mycteria americana)

Coulter, Malcolm C.; Rodgers, James A.; Ogden, John C.; Depkin, F. C.

doi:10.2173/bna.409

Cited by 21 publications

(51 citation statements)

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“…Lopes). Furthermore, anthropogenic hydropattern changes in the Florida Everglades altered the location and timing of wood stork breeding colonies (Ogden, 1991;Mitchel, 1999;Coulter et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

“…The program was run under the HKY finite sites model assuming the possibility of multiple hits, differences in nucleotide frequencies and the presence of transition/transversion bias (Nielsen and Wakeley, 2001). The divergence time was calculated using 389 bp (number of base pairs not considering the gap region), the generation time of 4 years (Coulter et al, 1999), the theta value from MDIV (4.5) and a mutation rate of 10% per million years. The conventional avian mtDNA clock suggests 2% sequence evolution between a pair of lineages per million years, but for control region sequences a ten-times faster rate has been employed for calibration (Quinn, 1992;Baker and Marshall, 1997).…”

Section: Statistical Analysesmentioning

confidence: 99%

“…Movement patterns of wood stork have been linked to the abundance and availability of food (Bryan Jr., 2001) and in the freshwater wetlands of southern Florida and the Georgia and South Carolina coastal marshes these birds have been observed throughout the year. Like other species in the family Ciconiidae that are threatened by habitat loss, the wood stork US population is endangered because of its sensitivity to environmental disturbances such as anthropogenic water level manipulations (Coulter et al, 1999;Wetlands International, 2002). In the US, wood stork has been listed as an endangered species after declining from an estimated population of 60,000 in the 1930s to about 5,000 in 1978 (USFWS, 1984;Ogden et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

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Demographic history of wood stork (Mycteria americana) Brazilian Pantanal colonies revealed by mitochondrial DNA analysis

et al. 2006

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We used mitochondrial DNA (mtDNA) sequences to investigate the demographic history of the wood stork (Mycteria americana) populations in the Brazilian Pantanal. Sequences of 390/460 bp fragment of the mtDNA control region were analyzed in 62 wood stork specimens from 8 colonies using neutrality tests, phylogeographic, and coalescent analyses. Population expansion was supported by the significantly negative values of Tajima's (D = -2.071) and Fu's (Fs = -14.544) statistics and the unimodal pattern of mismatch distribution. Nested clade analyses indicated a historic range expansion event and recurrent gene flow that was restricted by isolation by distance as explanations for the haplotype distribution among the sampled colonies. High genetic diversity and the strictly unidirectional gene flow pattern emphasized the conservation importance of preserving the southern Pantanal colonies. Coalescence analyses suggested that northern and southern colonies diverged approximately 6,250 years before the present (YBP), and that their most recent common ancestor was approximately 18,900 YBP. Our results suggest that the contemporary wood stork Pantanal population originated from a more geographically limited founder population. Potential source populations may have occurred in the southern Pantanal or ancestry may reside in populations inhabiting the Brazilian central plateau or areas closer to the equatorial region.

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Section: Discussionmentioning

confidence: 99%

Section: Statistical Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Demographic history of wood stork (Mycteria americana) Brazilian Pantanal colonies revealed by mitochondrial DNA analysis

et al. 2006

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“…Breeding colonies composed primarily of this species are formed annually in flooded wetland areas from the southeastern United States (US) to northern Argentina (Coulter et al, 1999). Although its range is extensive, most of what is known about wood stork biology comes from research carried out on the US breeding population (e.g., Coulter et al, 1999;Bryan Jr. et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Similar to other species of storks that are regionally endangered due to habitat degradation (International Union for Conservation of Nature; IUCN, 2010), the US wood stork population decline recorded between 1930 and 1978 has been attributed to the loss of wetland habitats (USFWS, 1996;Coulter et al, 1999;Brooks and Dean, 2008). However, due to the wood stork's large range and the apparent demographic stability recorded over other Neotropical wetland areas, the species is classified as of "least concern" by the IUCN at the global level (IUCN, 2010).…”

Section: Introductionmentioning

confidence: 99%

Genetic status of the wood stork (Mycteria americana) from the southeastern United States and the Brazilian Pantanal as revealed by mitochondrial DNA analysis

Lopes

Tomasulo‐Seccomandi²,

Bryan³

et al. 2011

Genet. Mol. Res.

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ABSTRACT. The wood stork (Mycteria americana) is a colonial wading bird that inhabits the Neotropical region from the southeastern United States (US) to northern Argentina. The species is considered to be endangered in the US due to degradation of its foraging and breeding habitat. In other parts of its range, such as in the Brazilian Pantanal region, breeding populations of this species appear to be stable. We compared the levels of genetic variability and population structuring of the US and the Pantanal breeding populations using mitochondrial DNA (mtDNA) control region 1910-1922 (2011) Mitochondrial DNA diversity of wood storks sequences. Twenty-seven haplotypes were identified among 88 wood stork samples collected from eight breeding colonies in the US and eight in the Pantanal. Patterns indicative of heteroplasmy were observed in 35.3% of the mtDNA sequences that were examined. Significantly higher levels of haplotype diversity were observed in the Pantanal samples compared to those from the US, suggesting that during the last century, demographic declines or a recent evolutionary bottleneck reduced the levels of mtDNA variability of the US population. Analyses of genetic structuring revealed non-significant genetic differentiation between these regions, indicating that either the populations were only recently separated or that gene flow continues to occur at low levels. Haplotype network analysis indicated low current levels of gene flow between populations that were closely related in the past.

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Genetic differentiation and historical demography of wood stork populations in Brazilian wetlands: Implications for the conservation of the species and associated ecosystems

Avelar

Silva

Perez

et al. 2017

Aquatic Conservation

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Wetlands are increasingly threatened by human activities worldwide. Genetic monitoring of associated wildlife provides valuable data to support their conservation. Waterbirds such as the wood stork (Mycteria americana) are good bioindicators of wetland disturbance and destruction. This study investigated past and contemporary levels of genetic diversity, differentiation and demographic processes in 236 wood storks from two major wetlands in Brazil in which breeding colonies are concentrated, using nine microsatellite loci and a 237‐bp untranslated fragment of the mitochondrial Control Region. Amapá populations (northern region) showed slightly higher levels of genetic diversity than Pantanal populations (central western region) and both populations had a low number of effective breeders. Results from assignment tests, F‐statistics, AMOVA, spatial and non‐spatial Bayesian clustering analyses support the hypothesis of gene flow among colonies within regions, but significant differentiation between regions. The better supported Bayesian coalescent models based on both markers indicated that the northern population exchanged migrants with unsampled populations, and that the central western population was founded by individuals from the north. Mitochondrial estimates revealed that the timing of population divergence broadly overlapped the Last Glacial Maximum (LGM), and that the central western population expanded more recently than the northern population. The results support the hypothesis that the coastal wetlands in northern Brazil remained stable enough to shelter large wood stork populations during the LGM and storks colonized freshwater wetlands in the central western region following deglacial warming. Conservation policies and protective measures should consider Amapá and Pantanal wood stork populations as genetically differentiated units and priority should be given to Amapá populations that represent the source gene pool. Continuous genetic monitoring of wood storks would help detect genetic signs of changes in demographic trends that may reflect alterations or degradation in wetlands.

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Wood Stork (Mycteria americana)

Cited by 21 publications

References 0 publications

Demographic history of wood stork (Mycteria americana) Brazilian Pantanal colonies revealed by mitochondrial DNA analysis

Demographic history of wood stork (Mycteria americana) Brazilian Pantanal colonies revealed by mitochondrial DNA analysis

Genetic status of the wood stork (Mycteria americana) from the southeastern United States and the Brazilian Pantanal as revealed by mitochondrial DNA analysis

Genetic differentiation and historical demography of wood stork populations in Brazilian wetlands: Implications for the conservation of the species and associated ecosystems

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