Morphological Adaptation with No Mitochondrial DNA Differentiation in the Coastal Plain Swamp Sparrow

The Auk ◽  
1998 ◽  
Vol 115 (3) ◽  
pp. 706-712 ◽  
Author(s):  
Russell Greenberg ◽  
Pedro J. Cordero ◽  
Sam Droege ◽  
Robert C. Fleischer
Keyword(s):  
Mitochondrial Dna ◽  
Coastal Plain ◽  
Morphological Adaptation ◽  
Swamp Sparrow

scholarly journals Stable-Isotope (C, N, H) Analyses Help Locate the Winter Range of the Coastal Plain Swamp Sparrow (Melospiza Georgiana Nigrescens)

The Auk ◽  
2007 ◽  
Vol 124 (4) ◽  
pp. 1137-1148 ◽  
Author(s):  
Russell Greenberg ◽  
Peter P. Marra ◽  
Matthew J. Wooller
Keyword(s):  
South Carolina ◽  
Stable Isotope ◽  
Coastal Plain ◽  
Isotope Analysis ◽  
Coastal Region ◽  
Breeding Habitat ◽  
Δ13c And Δ15n ◽  
Swamp Sparrow ◽  
Brackish Marshes ◽  
Melospiza Georgiana

Abstract Some taxa of North American birds have unknown winter ranges, because of the difficulty in tracking individuals between seasons. Stable isotopes may provide clues to help locate these nonbreeding populations. Previously, no valid records existed for the Coastal Plain Swamp Sparrow (Melospiza georgiana nigrescens) from October to late April. We used stable-isotope (C, N, and H) analyses to provide estimates of where molt occurs and then searched those areas for individuals of this species. The δ13C and δ15N of rump feathers were consistent with the Coastal Plain Swamp Sparrow molting in more saline marshes than the nominate subspecies after the breeding season, which confirms what was already known. The values for the same isotopes from crown feathers revealed that winter molt in the Coastal Plain Swamp Sparrow probably occurred in similar coastal brackish habitats. The δD of crown feathers indicated that prebreeding molt occurred at latitudes between South Carolina and Virginia. A subsequent search of this region located 18 Coastal Plain Swamp Sparrows, all of which were found in North Carolina or southeastern Virginia. Coastal Plain Swamp Sparrows were found predominantly in brackish marshes similar to their breeding habitat. On the basis of these observations, it appears that Coastal Plain Swamp Sparrows undergo a short southerly migration to a coastal region with substantially warmer winter conditions. This study is the first to make a specific geographic prediction based on stable-isotope analysis and to test the prediction in the field. Análisis de Isótopos Estables (C, N, H) Ayudan a Localizar la Distribución Invernal de Melospiza georgiana nigrescens

scholarly journals DISTRIBUTION, ABUNDANCE, AND HABITAT AFFINITIES OF THE COASTAL PLAIN SWAMP SPARROW

2003 ◽  
Vol 115 (1) ◽  
pp. 38-44 ◽  
Author(s):  
JON BEADELL ◽  
RUSSELL GREENBERG ◽  
SAM DROEGE ◽  
J. ANDREW ROYLE
Keyword(s):  
Coastal Plain ◽  
Swamp Sparrow ◽  
Habitat Affinities

Breeding Range Extension of the Coastal Plain Swamp Sparrow

2008 ◽  
Vol 120 (2) ◽  
pp. 393-395 ◽  
Author(s):  
Bryan D. Watts ◽  
Michael D. Wilson ◽  
Fletcher M. Smith ◽  
Barton J. Paxton ◽  
J. Bill Williams
Keyword(s):  
Coastal Plain ◽  
Range Extension ◽  
Swamp Sparrow ◽  
Breeding Range

scholarly journals Phylogenetic relationships within the genus Cynanthus (Aves: Trochilidae), with emphasis on C. doubledayi

Zootaxa ◽  
2008 ◽  
Vol 1742 (1) ◽  
pp. 61 ◽  
Author(s):  
GABRIELA M. GARCÍA-DERAS ◽  
NANDADEVI CORTÉS-RODRÍGUEZ ◽  
MAGALI HONEY ◽  
ADOLFO G. NAVARRO-SIGÜENZA ◽  
JAIME GARCÍA-MORENO ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Bayesian Inference ◽  
Maximum Likelihood ◽  
Coastal Plain ◽  
Phylogenetic Relationships ◽  
Maximum Parsimony ◽  
Taxonomic Status ◽  
Full Species ◽  
Preliminary Support

We investigated the phylogeny of the genus Cynanthus and the taxonomic status of C. doubledayi using partial sequences of the mitochondrial DNA gene ND2 and three phylogenetic approaches: maximum parsimony, maximum likelihood, and Bayesian inference. Our results corroborate the monophyly of the genus and provide preliminary support for the validity of C. doubledayi as a full species (not a subspecies of C. latirostris, as traditionally considered). As an endemic of the coastal plain of southwestern Mexico, C. doubledayi corroborates the importance of this region for in situ speciation of birds and other taxa.

Evaluation of the dark field method for large association of spread DNA

1978 ◽  
Vol 36 (2) ◽  
pp. 190-191
Author(s):  
Douglas C. Barker
Keyword(s):  
Electron Microscopy ◽  
Molecular Weight ◽  
Mitochondrial Dna ◽  
Extraction Method ◽  
Field Method ◽  
Dark Field ◽  
Kinetoplast Dna ◽  
Field Electron ◽  
Field Electron Microscopy ◽  
Dark Field Electron

A number of satisfactory methods are available for the electron microscopy of nicleic acids. These methods concentrated on fragments of nuclear, viral and mitochondrial DNA less than 50 megadaltons, on denaturation and heteroduplex mapping (Davies et al 1971) or on the interaction between proteins and DNA (Brack and Delain 1975). Less attention has been paid to the experimental criteria necessary for spreading and visualisation by dark field electron microscopy of large intact issociations of DNA. This communication will report on those criteria in relation to the ultrastructure of the (approx. 1 x 10-14g) DNA component of the kinetoplast from Trypanosomes. An extraction method has been developed to eliminate native endonucleases and nuclear contamination and to isolate the kinetoplast DNA (KDNA) as a compact network of high molecular weight. In collaboration with Dr. Ch. Brack (Basel [nstitute of Immunology), we studied the conditions necessary to prepare this KDNA Tor dark field electron microscopy using the microdrop spreading technique.

Properties of Isolated Mitochondria of Agaricus Bisporus: Their Relationship to Dormancy and the Germination of Spores

1973 ◽  
Vol 31 ◽  
pp. 458-459
Author(s):  
K. S. McCarty ◽  
R. F. Weave ◽  
L. Kemper ◽  
F. S. Vogel
Keyword(s):  
Mitochondrial Dna ◽  
Ethidium Bromide ◽  
Microscopic Examination ◽  
Agaricus Bisporus ◽  
Osmotic Shock ◽  
Electron Microscopic Examination ◽  
Electron Microscopic ◽  
Isolated Mitochondria ◽  
Dna Strands ◽  
Cytoplasmic Ribosomes

During the prodromal stages of sporulation in the Basidiomycete, Agaricus bisporus, mitochondria accumulate in the basidial cells, zygotes, in the gill tissues prior to entry of these mitochondria, together with two haploid nuclei and cytoplasmic ribosomes, into the exospores. The mitochondria contain prominent loci of DNA [Fig. 1]. A modified Kleinschmidt spread technique1 has been used to evaluate the DNA strands from purified whole mitochondria released by osmotic shock, mitochondrial DNA purified on CsCl gradients [density = 1.698 gms/cc], and DNA purified on ethidium bromide CsCl gradients. The DNA appeared as linear strands up to 25 u in length and circular forms 2.2-5.2 u in circumference. In specimens prepared by osmotic shock, many strands of DNA are apparently attached to membrane fragments [Fig. 2]. When mitochondria were ruptured in hypotonic sucrose and then fixed in glutaraldehyde, the ribosomes were released for electron microscopic examination.

Upper Cretaceous and Cenozoic Geology of the Southeastern Atlantic Coastal Plain: Atlanta, Georgia to Chesapeake, Virginia July 1-9, 1989

10.1029/ft172 ◽  
1989 ◽  
Author(s):  
W. Burleigh Harris ◽  
Vernon J. Hurst ◽  
Paul G. Nystrom ◽  
Lauck W. Ward ◽  
Charles W. Hoffman ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Upper Cretaceous ◽  
Atlantic Coastal Plain ◽  
Atlantic Coastal ◽  
Southeastern Atlantic
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