1
|
Khimoun A, Eraud C, Ollivier A, Arnoux E, Rocheteau V, Bely M, Lefol E, Delpuech M, Carpentier ML, Leblond G, Levesque A, Charbonnel A, Faivre B, Garnier S. Habitat specialization predicts genetic response to fragmentation in tropical birds. Mol Ecol 2016; 25:3831-44. [PMID: 27314987 DOI: 10.1111/mec.13733] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 06/06/2016] [Accepted: 06/07/2016] [Indexed: 01/19/2023]
Abstract
Habitat fragmentation is one of the most severe threats to biodiversity as it may lead to changes in population genetic structure, with ultimate modifications of species evolutionary potential and local extinctions. Nonetheless, fragmentation does not equally affect all species and identifying which ecological traits are related to species sensitivity to habitat fragmentation could help prioritization of conservation efforts. Despite the theoretical link between species ecology and extinction proneness, comparative studies explicitly testing the hypothesis that particular ecological traits underlies species-specific population structure are rare. Here, we used a comparative approach on eight bird species, co-occurring across the same fragmented landscape. For each species, we quantified relative levels of forest specialization and genetic differentiation among populations. To test the link between forest specialization and susceptibility to forest fragmentation, we assessed species responses to fragmentation by comparing levels of genetic differentiation between continuous and fragmented forest landscapes. Our results revealed a significant and substantial population structure at a very small spatial scale for mobile organisms such as birds. More importantly, we found that specialist species are more affected by forest fragmentation than generalist ones. Finally, our results suggest that even a simple habitat specialization index can be a satisfying predictor of genetic and demographic consequences of habitat fragmentation, providing a reliable practical and quantitative tool for conservation biology.
Collapse
Affiliation(s)
- Aurélie Khimoun
- UMR 6282 Biogéosciences, CNRS/Univ. Bourgogne Franche-Comté, Equipe BIOME, 6 bd Gabriel, 21000, Dijon, France
| | - Cyril Eraud
- Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, Station biologique de Chizé, Carrefour de la Canauderie, 79360, Villiers en Bois, France
| | - Anthony Ollivier
- UMR 6282 Biogéosciences, CNRS/Univ. Bourgogne Franche-Comté, Equipe BIOME, 6 bd Gabriel, 21000, Dijon, France
| | - Emilie Arnoux
- UMR 6282 Biogéosciences, CNRS/Univ. Bourgogne Franche-Comté, Equipe BIOME, 6 bd Gabriel, 21000, Dijon, France
| | - Vincent Rocheteau
- UMR 6282 Biogéosciences, CNRS/Univ. Bourgogne Franche-Comté, Equipe BIOME, 6 bd Gabriel, 21000, Dijon, France
| | - Marine Bely
- Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, Station biologique de Chizé, Carrefour de la Canauderie, 79360, Villiers en Bois, France
| | - Emilie Lefol
- Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, Station biologique de Chizé, Carrefour de la Canauderie, 79360, Villiers en Bois, France
| | - Martin Delpuech
- Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, Station biologique de Chizé, Carrefour de la Canauderie, 79360, Villiers en Bois, France
| | - Marie-Laure Carpentier
- Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, Station biologique de Chizé, Carrefour de la Canauderie, 79360, Villiers en Bois, France
| | - Gilles Leblond
- SARL BIOS, 168 rue de Brindeau, 97190, Le Gosier, France
| | - Anthony Levesque
- Office National de la Chasse et de la Faune Sauvage, Cellule Technique des Antilles Françaises, Chemin de Boyer, Section Boisbert, 97129, Le Lamentin, France
| | - Anaïs Charbonnel
- Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, Station biologique de Chizé, Carrefour de la Canauderie, 79360, Villiers en Bois, France
| | - Bruno Faivre
- UMR 6282 Biogéosciences, CNRS/Univ. Bourgogne Franche-Comté, Equipe BIOME, 6 bd Gabriel, 21000, Dijon, France
| | - Stéphane Garnier
- UMR 6282 Biogéosciences, CNRS/Univ. Bourgogne Franche-Comté, Equipe BIOME, 6 bd Gabriel, 21000, Dijon, France
| |
Collapse
|
2
|
de Oliveira Gordinho L, Hasselquist D, Neto JM. Asymmetric song recognition between recently diverged subspecies of reed bunting. Behav Ecol 2016. [DOI: 10.1093/beheco/arw062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
3
|
Arnoux E, Eraud C, Navarro N, Tougard C, Thomas A, Cavallo F, Vetter N, Faivre B, Garnier S. Morphology and genetics reveal an intriguing pattern of differentiation at a very small geographic scale in a bird species, the forest thrush Turdus lherminieri. Heredity (Edinb) 2014; 113:514-25. [PMID: 24984605 DOI: 10.1038/hdy.2014.56] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 04/11/2014] [Accepted: 05/06/2014] [Indexed: 11/09/2022] Open
Abstract
Mobile organisms are expected to show population differentiation only over fairly large geographical distances. However, there is growing evidence of discrepancy between dispersal potential and realized gene flow. Here we report an intriguing pattern of differentiation at a very small spatial scale in the forest thrush (Turdus lherminieri), a bird species endemic to the Lesser Antilles. Analysis of 331 individuals from 17 sampling sites distributed over three islands revealed a clear morphological and genetic differentiation between these islands isolated by 40-50 km. More surprisingly, we found that the phenotypic divergence between the two geographic zones of the island of Guadeloupe was associated with a very strong genetic differentiation (Fst from 0.073-0.153), making this pattern a remarkable case in birds given the very small spatial scale considered. Molecular data (mitochondrial control region sequences and microsatellite genotypes) suggest that this strong differentiation could have occurred in situ, although alternative hypotheses cannot be fully discarded. This study suggests that the ongoing habitat fragmentation, especially in tropical forests, may have a deeper impact than previously thought on avian populations.
Collapse
Affiliation(s)
- E Arnoux
- Biogéosciences, UMR CNRS 6282, Equipe BIOME, Université de Bourgogne, Dijon, France
| | - C Eraud
- Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, Station Biologique de Chizé, Carrefour de la Canauderie, Villiers en Bois, France
| | - N Navarro
- 1] Biogéosciences, UMR CNRS 6282, Equipe BIOME, Université de Bourgogne, Dijon, France [2] Laboratoire EPHE PALEVO-Ecole Pratique des Hautes Etudes, Dijon, France
| | - C Tougard
- Institut des Sciences de l'Evolution de Montpellier, IMR CNRS 5554 and UMR IRD 226, Université de Montpellier II, Place Eugène Bataillon, CC065, Montpellier, France
| | - A Thomas
- Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, Station Biologique de Chizé, Carrefour de la Canauderie, Villiers en Bois, France
| | - F Cavallo
- 1] Biogéosciences, UMR CNRS 6282, Equipe BIOME, Université de Bourgogne, Dijon, France [2] Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, Station Biologique de Chizé, Carrefour de la Canauderie, Villiers en Bois, France
| | - N Vetter
- Biogéosciences, UMR CNRS 6282, Equipe BIOME, Université de Bourgogne, Dijon, France
| | - B Faivre
- Biogéosciences, UMR CNRS 6282, Equipe BIOME, Université de Bourgogne, Dijon, France
| | - S Garnier
- Biogéosciences, UMR CNRS 6282, Equipe BIOME, Université de Bourgogne, Dijon, France
| |
Collapse
|
4
|
Phenotypic divergence among west European populations of Reed Bunting Emberiza schoeniclus: the effects of migratory and foraging behaviours. PLoS One 2013; 8:e63248. [PMID: 23667594 PMCID: PMC3646775 DOI: 10.1371/journal.pone.0063248] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 04/02/2013] [Indexed: 11/19/2022] Open
Abstract
Divergent selection and local adaptation are responsible for many phenotypic differences between populations, potentially leading to speciation through the evolution of reproductive barriers. Here we evaluated the morphometric divergence among west European populations of Reed Bunting in order to determine the extent of local adaptation relative to two important selection pressures often associated with speciation in birds: migration and diet. We show that, as expected by theory, migratory E. s. schoeniclus had longer and more pointed wings and a slightly smaller body mass than the resident subspecies, with the exception of E. s. lusitanica, which despite having rounder wings was the smallest of all subspecies. Tail length, however, did not vary according to the expectation (shorter tails in migrants) probably because it is strongly correlated with wing length and might take longer to evolve. E. s. witherbyi, which feed on insects hiding inside reed stems during the winter, had a very thick, stubby bill. In contrast, northern populations, which feed on seeds, had thinner bills. Despite being much smaller, the southern E. s. lusitanica had a significantly thicker, longer bill than migratory E. s. schoeniclus, whereas birds from the UK population had significantly shorter, thinner bills. Geometric morphometric analyses revealed that the southern subspecies have a more convex culmen than E. s. schoeniclus, and E. s. lusitanica differs from the nominate subspecies in bill shape to a greater extent than in linear bill measurements, especially in males. Birds with a more convex culmen are thought to exert a greater strength at the bill tip, which is in agreement with their feeding technique. Overall, the three subspecies occurring in Western Europe differ in a variety of traits following the patterns predicted from their migratory and foraging behaviours, strongly suggesting that these birds have became locally adapted through natural selection.
Collapse
|
5
|
EDELAAR P, ALONSO D, LAGERVELD S, SENAR JC, BJÖRKLUND M. Population differentiation and restricted gene flow in Spanish crossbills: not isolation-by-distance but isolation-by-ecology. J Evol Biol 2012; 25:417-30. [DOI: 10.1111/j.1420-9101.2011.02443.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
6
|
Spurgin LG, van Oosterhout C, Illera JC, Bridgett S, Gharbi K, Emerson BC, Richardson DS. Gene conversion rapidly generates major histocompatibility complex diversity in recently founded bird populations. Mol Ecol 2011; 20:5213-25. [PMID: 22106868 DOI: 10.1111/j.1365-294x.2011.05367.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lewis G Spurgin
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | | | | | | | | | | | | |
Collapse
|
7
|
Ballentine B, Greenberg R. Common garden experiment reveals genetic control of phenotypic divergence between swamp sparrow subspecies that lack divergence in neutral genotypes. PLoS One 2010; 5:e10229. [PMID: 20419104 PMCID: PMC2856683 DOI: 10.1371/journal.pone.0010229] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2009] [Accepted: 03/07/2010] [Indexed: 11/30/2022] Open
Abstract
Background Adaptive divergence between populations in the face of strong selection on key traits can lead to morphological divergence between populations without concomitant divergence in neutral DNA. Thus, the practice of identifying genetically distinct populations based on divergence in neutral DNA may lead to a taxonomy that ignores evolutionarily important, rapidly evolving, locally-adapted populations. Providing evidence for a genetic basis of morphological divergence between rapidly evolving populations that lack divergence in selectively neutral DNA will not only inform conservation efforts but also provide insight into the mechanisms of the early processes of speciation. The coastal plain swamp sparrow, a recent colonist of tidal marsh habitat, differs from conspecific populations in a variety of phenotypic traits yet remains undifferentiated in neutral DNA. Methods and Principal Findings Here we use an experimental approach to demonstrate that phenotypic divergence between ecologically separated populations of swamp sparrows is the result of local adaptation despite the lack of divergence in neutral DNA. We find that morphological (bill size and plumage coloration) and life history (reproductive effort) differences observed between wild populations were maintained in laboratory raised individuals suggesting genetic divergence of fitness related traits. Conclusions and Significance Our results support the hypothesis that phenotypic divergence in swamps sparrows is the result of genetic differentiation, and demonstrate that adaptive traits have evolved more rapidly than neutral DNA in these ecologically divergent populations that may be in the early stages of speciation. Thus, identifying evolutionarily important populations based on divergence in selectively neutral DNA could miss an important level of biodiversity and mislead conservation efforts.
Collapse
Affiliation(s)
- Barbara Ballentine
- Smithsonian Migratory Bird Center, National Zoological Park, University of West Georgia, Carrollton, Georgia, United States of America.
| | | |
Collapse
|
8
|
The consequences of winter flock demography for genetic structure and inbreeding risk in vinous-throated parrotbills, Paradoxornis webbianus. Heredity (Edinb) 2009; 104:472-81. [DOI: 10.1038/hdy.2009.135] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
|
9
|
Matessi G, Dabelsteen T, Pilastro A. Subspecies song discrimination in a Mediterranean population of the reed buntingEmberiza schoeniclus intermedia. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/11250000109356424] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
10
|
Gay L, Neubauer G, Zagalska-Neubauer M, Pons JM, Bell DA, Crochet PA. Speciation with gene flow in the large white-headed gulls: does selection counterbalance introgression? Heredity (Edinb) 2008; 102:133-46. [PMID: 18813326 DOI: 10.1038/hdy.2008.99] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
We investigated the role of selection in generating and maintaining species distinctness in spite of ongoing gene flow, using two zones of secondary contact between large gull species in Europe (Larus argentatus and Larus cachinnans) and North America (Larus glaucescens and Larus occidentalis). We used the pattern of neutral genetic differentiation at nine microsatellite loci (F(ST)) as an indicator of expected changes under neutral processes and compared it with phenotypic differentiation (P(ST)) for a large number of traits (size, plumage melanism and coloration of bare parts). Even assuming very low heritability, interspecific divergence between L. glaucescens and L. occidentalis in plumage melanism and orbital ring colour clearly exceeded neutral differentiation. Similarly, melanism of the central primaries was highly divergent between L. argentatus and L. cachinnans. Such divergence is unlikely to have arisen randomly and is therefore attributed to spatially varying selection. Variation in plumage melanism in both transects agrees with Gloger's rule, which suggests that latitude (and associated sun and humidity gradients) could be the selective pressure shaping differentiation in plumage melanism. We suggest that strong species differentiation in orbital ring colour results from sexual selection. We conclude that these large gull species, along with other recently diverged species that hybridize after coming into secondary contact, may differ only in restricted regions of the genome that are undergoing strong disruptive selection because of their phenotypic effects.
Collapse
Affiliation(s)
- L Gay
- CEFE-CNRS, UMR 5175, Montpellier cedex 5, France.
| | | | | | | | | | | |
Collapse
|
11
|
MARTHINSEN GUNNHILD, WENNERBERG LIV, LIFJELD JANT. Phylogeography and subspecies taxonomy of dunlins (Calidris alpina) in western Palearctic analysed by DNA microsatellites and amplified fragment length polymorphism markers. Biol J Linn Soc Lond 2007. [DOI: 10.1111/j.1095-8312.2007.00931.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
12
|
Guillaumet A, Crochet PA, Godelle B. Phenotypic variation in Galerida larks in Morocco: the role of history and natural selection. Mol Ecol 2006; 14:3809-21. [PMID: 16202098 DOI: 10.1111/j.1365-294x.2005.02696.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The relative influences of history, natural selection and hybridization in shaping phenotypic variation in closely related taxa is a crucial issue in current evolutionary biology. In this study, we used as a model two sibling but paradoxically highly variable species of larks (Galerida theklae and Galerida cristata) of Morocco to separate the impacts of these evolutionary forces. In the former species, variation is manifested mainly in colouration, while in the latter, variation also encompasses bill size and shape. Mitochondrial and nuclear DNA sequencing were used to identify the historical relationships among the subspecies and species. According to our analyses, G. cristata and G. theklae diverged about 3.7 million years ago (Ma), and we found no evidence for a role of hybridization in maintaining their similarity. In G. theklae, there was no further subdivision, while in G. cristata two major mtDNA groups were identified (divergence approximately 1.1 Ma). These two lineages are parapatric and regroup, respectively, the three short-billed subspecies [G. (cristata) cristata] and the two long-billed subspecies [G. (cristata) randonii]. Patterns of morphological variation were then contrasted to this pattern of neutral relationships: we found that G. (c.) cristata was morphologically more similar to G. theklae than to G. (c.) randonii. Overall, these results point towards the prominent role of (i) natural selection and/or phenotypic plasticity in adapting the plumage to local conditions and (ii) natural selection in combination with historical isolation in driving the divergence in size and bill morphology in the crested larks.
Collapse
Affiliation(s)
- A Guillaumet
- Laboratoire Génome, Populations, Interactions, Adaptation, CNRS UMR 5171, Université Montpellier II, C.C. 63, 34095 Montpellier cedex 5, France.
| | | | | |
Collapse
|
13
|
Thomassen HA, Wiersema AT, de Bakker MAG, de Knijff P, Hetebrij E, Povel GDE. A new phylogeny of swiftlets (Aves: Apodidae) based on cytochrome-b DNA. Mol Phylogenet Evol 2003; 29:86-93. [PMID: 12967609 DOI: 10.1016/s1055-7903(03)00066-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Due to a lack of distinctive morphological characters, swift taxonomy and phylogeny has always been an area of disagreement. To shed more light on this subject, we reconstructed swift(let) phylogeny based on 1143 bp of mitochondrial cytochrome-b DNA sequence. Although this is not the first attempt to reconstruct swift phylogeny using molecular data, our results show higher support for many of the branches due to our much longer sequences. However, placement of Hydrochous is still unexpected. Implementation of more conservative genetic regions and sampling of more taxa could solve this problem. Most importantly, the Collocaliini resolve as a monophyletic group. The internal structure of the group shows that non-echolocating Collocalia and echolocating Aerodramus form two distinct clades. This is in congruence with earlier classifications based on morphological characters, but in contrast with more recent classifications.
Collapse
Affiliation(s)
- Henri A Thomassen
- Institute of Biology Leiden, Faculty for Mathematics and Natural Sciences, Leiden University, P.O. Box 9516, 2300 RA Leiden, The Netherlands.
| | | | | | | | | | | |
Collapse
|
14
|
Chan Y, Arcese P. Morphological and microsatellite differentiation in Melospiza melodia (Aves) at a microgeographic scale. J Evol Biol 2003; 16:939-47. [PMID: 14635909 DOI: 10.1046/j.1420-9101.2003.00601.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Geographical variation in microsatellite allele frequencies and morphology were compared for five subspecies of Melospiza melodia (song sparrow; M. m. samuelis, M. m. maxillaris, M. m. pusillula, M. m. gouldii, and M. m. heermanni) in 14 populations in the San Francisco Bay region to (a) assess divergence based on these estimates and (b) test the hypothesis that drift is responsible for morphological and genetic divergence. Morphological differentiation between subspecies was high despite low differentiation at microsatellite loci, indicating high gene flow and large effective population sizes. Low concordance of morphological and genetic estimates of divergence suggests that selection or phenotypic plasticity in morphology has caused morphological differentiation among the subspecies.
Collapse
Affiliation(s)
- Y Chan
- Department of Forest Sciences, Centre for Applied Conservation Research, University of British Columbia, Vancouver, B.C., Canada.
| | | |
Collapse
|
15
|
Segelbacher G, Höglund J, Storch I. From connectivity to isolation: genetic consequences of population fragmentation in capercaillie across Europe. Mol Ecol 2003; 12:1773-80. [PMID: 12803630 DOI: 10.1046/j.1365-294x.2003.01873.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The capercaillie inhabits a continuous range in large parts of the Palearctic boreal forest, but is patchily distributed in temperate Europe. An ongoing population decline, largely related to human land use changes, has been most pronounced in central and western Europe, where some local populations have become extinct. In this study, we document the genetic differentiation of capercaillie populations at different stages along a gradient of spatial structuring from high connectivity (continuous range in the boreal forest) to a metapopulation systems (Alps) and recent (central Europe) and historic (Pyrenees) isolation. Four hundred and sixty individuals from 14 sample sites were genotyped at 10 polymorphic microsatellite loci to assess genetic structure and variation of capercaillie populations across its European range. As expected, differentiation was least pronounced within the continuous range in the boreal forest. Within the metapopulation system of the Alps, differentiation was less than among the isolated populations of central Europe (Black Forest, Fichtelgebirge, Thuringia, Vosges). In the long-isolated population of the Pyrenees, and the recently isolated populations of central Europe, genetic diversity was significantly reduced compared with the Alps and boreal forest. Our results agree with the concept of a gradual increase in genetic differentiation from connectivity to isolation, and from recent to historic isolation. Anthropogenic habitat deterioration and fragmentation thus not only leads to range contractions and extinctions, but may also have significant genetic and evolutionary consequences for surviving populations. To maintain high levels of genetic variation in species in fragmented habitats, conservation should aim at securing connectivity between spatially distinct populations.
Collapse
Affiliation(s)
- G Segelbacher
- Max Planck Research Centre for Ornithology, Vogelwarte Radolfzell, Radolfzell, Germany.
| | | | | |
Collapse
|
16
|
Matessi G, Pilastro A, Marin G. Population Memetic Analysis of Variation of Song, Geographical Distribution and Bill Morphology in the Reed Bunting. ACTA ACUST UNITED AC 2002. [DOI: 10.1556/select.2.2001.1-2.15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
17
|
MATESSI GIULIANO, GRIGGIO MATTEO, PILASTRO ANDREA. The geographical distribution of populations of the large-billed subspecies of reed bunting matches that of its main winter food. Biol J Linn Soc Lond 2002. [DOI: 10.1046/j.1095-8312.2002.00003.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
18
|
Lee PL, Bradbury RB, Wilson JD, Flanagan NS, Richardson L, Perkins AJ, Krebs JR. Microsatellite variation in the yellowhammer Emberiza citrinella: population structure of a declining farmland bird. Mol Ecol 2001; 10:1633-44. [PMID: 11472532 DOI: 10.1046/j.1365-294x.2001.01305.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In recent years, there has been much concern in the UK about population declines of widespread species in agricultural habitats. Conservation-orientated research on declining birds has focused on vital rates of survival and productivity. However, the environmental factors which may influence movements between populations of widespread species is poorly understood. Population genetic structure is an indirect description of dispersal between groups of individuals. To attempt to develop an understanding of genetic structuring in a widespread, but declining, farmland bird, we therefore investigated the yellowhammer, Emberiza citrinella, population in England and Wales using microsatellite data. Our first aim was to investigate whether there was genetic substructuring in the population. A second aim was to investigate if there was a relationship between genetic distances and various environmental variables. Finally, we analysed the microsatellite data for evidence of loss of genetic variation due to population decline. Our data showed a slight but significant structure within the yellowhammer population. This therefore cannot be considered a panmictic population. Our example from South Cumbria implies that high-altitude barriers may have a slight influence on population structure. However, on the whole, genetic distances between sample sites were not significantly correlated with geographical distances, degrees of population connectivity, high altitudes, or differences in precipitation between sites. Finally, we detected departures from mutation-drift equilibrium (excess heterozygosity), which is indicative of a loss of genetic variation through recent decline.
Collapse
Affiliation(s)
- P L Lee
- Farmland Bird Group, Edward Grey Institute of Field Ornithology, Department of Zoology, South Parks Road, Oxford OX1 3PS, UK.
| | | | | | | | | | | | | |
Collapse
|
19
|
Abstract
Selection on allozymes has sometimes been advanced as one explanation for the low levels of population differentiation detected in avian populations by the use of enzymatic markers. Comparisons of the amount of population subdivision (estimated by FST values or analogous indices) measured by enzymatic and mitochondrial DNA (mtDNA) markers in birds were seen as evidence for this because mtDNA typically produces a more structured picture of population subdivisions. In fact, when taking into account the smaller effective population size of mtDNA, nuclear and mitochondrial markers give concordant results. Some discrepancies still exist, but I suggest that some might originate from different amounts of nuclear vs. mitochondrial gene flow due to partial reproductive isolation. Variable number of tandem repeat (VNTR) loci do not provide a dramatically different picture of population structures in birds compared to allozymes. Although more tests are needed, such as comparing the amount of genetic structure detected in the same populations with allozymes and microsatellites, the low levels of population subdivision measured with allozymes in birds seem to reflect historical and demographic processes and would not appear to result from any peculiarities of bird enzymatic loci.
Collapse
Affiliation(s)
- P A Crochet
- Centre d'Ecologie Fonctionnelle et Evolutive, CNRS 1919 route de Mende, F-34293 Montpellier cedex 5, France.
| |
Collapse
|
20
|
Matessi G, Pilastro A, Marin G. Variation in quantitative properties of song among European populations of reed bunting (Emberiza schoeniclus) with respect to bill morphology. CAN J ZOOL 2000. [DOI: 10.1139/z99-233] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We analysed the geographical variation in quantitative song properties among reed bunting (Emberiza schoeniclus ssp.) populations belonging to two subspecies groups with different bill morphologies: large and curved bill (namely E. s. intermedia and E. s. witherbyi, in southern Europe) and thin and conical bill (E. s. schoeniclus, in northern Europe). We collected song recordings from 11 European populations of the two subspecies groups and measured song properties of 116 males. We found significant differences among populations despite a high degree of individual variation. Populations with similar morphology were more homogeneous in song characters, despite geographical distances between them. The two subspecies groups differed mainly in the number of different syllable types used in a song, with the songs of the southern group having higher syllabic complexity. Cluster analysis and matrix correlation tests showed an association between song variation and morphological variation. The populations morphologically belonging to E. s. schoeniclus along the contact zone of the breeding distributions had song characters similar to southern populations and possibly represent a "hybrid" zone, which is not evidenced by morphological or recent genetic analyses. This may be due to song being learned socially, populations mixing in winter and, along the contact zone, populations of different subspecies groups often breeding a few kilometres apart. The generally high degree of variation in song among populations can be a consequence of the relative isolation of the breeding populations, which are restricted to uncommon and fragmented habitats, along with the rapid cultural evolution of song in this species.
Collapse
|