1
|
Taylor CL, Barker NP, Barber-James HM, Villet MH, Pereira-da-Conceicoa LL. Habitat requirements affect genetic variation in three species of mayfly (Ephemeroptera, Baetidae) from South Africa. Zookeys 2020; 936:1-24. [PMID: 32547291 PMCID: PMC7272479 DOI: 10.3897/zookeys.936.38587] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Accepted: 11/04/2019] [Indexed: 12/23/2022] Open
Abstract
This study investigates genetic diversity in three species of Ephemeroptera, one eurytopic and therefore widespread (Afroptilumsudafricanum) and two stenotopic and thus endemic (Demoreptusnatalensis and Demoreptuscapensis) species, all of which co-occur in the southern Great Escarpment, South Africa. Mitochondrial DNA was analysed to compare the genetic diversity between the habitat generalist and the two habitat specialists. Afroptilumsudafricanum showed no indication of population genetic structure due to geographic location, while both Demoreptus species revealed clear genetic differentiation between geographic localities and catchments, evident from phylogenetic analyses and high FST values from AMOVA. In addition, the phylogenetic analyses indicate some deeper haplotype divergences within A.sudafricanum and Demoreptus that merit taxonomic attention. These results give important insight into evolutionary processes occurring through habitat specialisation and population isolation. Further research and sampling across a wider geographic setting that includes both major mountain blocks of the Escarpment and lowland non-Escarpment sites will allow for refined understanding of biodiversity and associated habitat preferences, and illuminate comparative inferences into gene flow and cryptic speciation.
Collapse
Affiliation(s)
- Chantal L Taylor
- Department of Zoology and Entomology, Rhodes University, Somerset Street, Makhanda (Grahamstown), 6140, South Africa
| | - Nigel P Barker
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, 0028, South Africa
| | - Helen M Barber-James
- Department of Zoology and Entomology, Rhodes University, Somerset Street, Makhanda (Grahamstown), 6140, South Africa.,Department of Freshwater Invertebrates, Albany Museum, Somerset Street, Makhanda (Grahamstown), 6140, South Africa
| | - Martin H Villet
- Department of Zoology and Entomology, Rhodes University, Somerset Street, Makhanda (Grahamstown), 6140, South Africa
| | | |
Collapse
|
2
|
Spitzer B. Genetic Structure in Populations ofBaetis tricaudatusin the San Bernardino Mountains. WEST N AM NATURALIST 2014. [DOI: 10.3398/064.074.0409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
3
|
YOUNG BA, SCHMIDT DJ, SHELDON F. Small-scale patterns of genetic variation in a headwater specialist mayfly: No influence of selective forest harvesting on diversity. AUSTRAL ECOL 2012. [DOI: 10.1111/j.1442-9993.2012.02440.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
4
|
Aquatic Insects in Eastern Australia: A Window on Ecology and Evolution of Dispersal in Streams. INSECTS 2011; 2:447-61. [PMID: 26467824 PMCID: PMC4553437 DOI: 10.3390/insects2040447] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 10/06/2011] [Accepted: 10/10/2011] [Indexed: 11/17/2022]
Abstract
Studies of connectivity of natural populations are often conducted at different timescales. Studies that focus on contemporary timescales ask questions about dispersal abilities and dispersal behavior of their study species. In contrast, studies conducted at historical timescales are usually more focused on evolutionary or biogeographic questions. In this paper we present a synthesis of connectivity studies that have addressed both these timescales in Australian Trichoptera and Ephemeroptera. We conclude that: (1) For both groups, the major mechanism of dispersal is by adult flight, with larval drift playing a very minor role and with unusual patterns of genetic structure at fine scales explained by the “patchy recruitment hypothesis”; (2) There is some evidence presented to suggest that at slightly larger spatial scales (∼100 km) caddisflies may be slightly more connected than mayflies; (3) Examinations of three species at historical timescales showed that, in southeast Queensland Australia, despite there being no significant glaciation during the Pleistocene, there are clear impacts of Pleistocene climate changes on their genetic structure; and (4) The use of mitochondrial DNA sequence data has uncovered a number of cryptic species complexes in both trichopterans and ephemeropterans. We conclude with a number of suggestions for further work.
Collapse
|
5
|
Funk DH, Sweeney BW, Jackson JK. Why stream mayflies can reproduce without males but remain bisexual: a case of lost genetic variation. ACTA ACUST UNITED AC 2010. [DOI: 10.1899/10-015.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- David H. Funk
- Stroud Water Research Center, 970 Spencer Road, Avondale, Pennsylvania 19311 USA
| | - Bernard W. Sweeney
- Stroud Water Research Center, 970 Spencer Road, Avondale, Pennsylvania 19311 USA
| | - John K. Jackson
- Stroud Water Research Center, 970 Spencer Road, Avondale, Pennsylvania 19311 USA
| |
Collapse
|
6
|
Smith RF, Alexander LC, Lamp WO. Dispersal by terrestrial stages of stream insects in urban watersheds: a synthesis of current knowledge. ACTA ACUST UNITED AC 2009. [DOI: 10.1899/08-176.1] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Robert F. Smith
- Department of Entomology, 4112 Plant Sciences Building, University of Maryland, College Park, Maryland 20742-4454 USA
| | - Laurie C. Alexander
- Department of Entomology, 4112 Plant Sciences Building, University of Maryland, College Park, Maryland 20742-4454 USA
| | - William O. Lamp
- Department of Entomology, 4112 Plant Sciences Building, University of Maryland, College Park, Maryland 20742-4454 USA
| |
Collapse
|
7
|
McCulloch GA, Wallis GP, Waters JM. Do insects lose flight before they lose their wings? Population genetic structure in subalpine stoneflies. Mol Ecol 2009; 18:4073-87. [PMID: 19754508 DOI: 10.1111/j.1365-294x.2009.04337.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
8
|
Rebora M, Lucentini L, Palomba A, Panara F, Gaino E. Genetic differentiation among populations ofBaetis rhodani(Ephemeroptera, Baetidae) in three Italian streams. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/11250000509356662] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Manuela Rebora
- a Dipartimento di Biologia Animale ed Ecologia , Università di Perugia , Via Pascoli, Perugia, I‐6123, Italy
| | - Livia Lucentini
- b Dipartimento di Biologia Cellulare e Molecolare , Università di Perugia , Via Pascoli, Perugia, I‐6123, Italy
| | - Antonella Palomba
- b Dipartimento di Biologia Cellulare e Molecolare , Università di Perugia , Via Pascoli, Perugia, I‐6123, Italy
| | - Fausto Panara
- b Dipartimento di Biologia Cellulare e Molecolare , Università di Perugia , Via Pascoli, Perugia, I‐6123, Italy
| | - Elda Gaino
- c Dipartimento di Biologia Animale ed Ecologia , Università di Perugia , Via Pascoli, Perugia, I‐6123, Italy E-mail:
| |
Collapse
|
9
|
Finston TL, Johnson MS, Humphreys WF, Eberhard SM, Halse SA. Cryptic speciation in two widespread subterranean amphipod genera reflects historical drainage patterns in an ancient landscape. Mol Ecol 2007; 16:355-65. [PMID: 17217350 DOI: 10.1111/j.1365-294x.2006.03123.x] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The landscape of the Pilbara region of Western Australia has been relatively unchanged for 100 million years. The ancient river systems of this region might be expected to be sources of isolation and divergence for aquatic species. Hence, the occurrence of widespread groundwater taxa in this landscape offers the opportunity to examine associations between genetic diversity and drainage patterns. Pilbarus and Chydaekata are two widespread genera of subterranean amphipods endemic to the Pilbara, each occupying multiple tributaries. We used molecular data to examine the roles of drainage patterns in structuring genetic diversity. Gene flow within a tributary may be facilitated by the occasional occurrence of these amphipods in springs, which results in their downstream dispersal during episodic flooding. However, tributary boundaries may form hydrological barriers to gene flow, resulting in localised isolation of populations and divergence. Samples of both genera, collected throughout three river basins, were examined for sequence divergence in the cytochrome c oxidase I mitochondrial gene. There was no evidence of contemporary gene flow among populations of either genus, and each tributary contained highly divergent lineages, which were not associated with similar morphological differentiation. This suggests cryptic speciation has occurred, and similar phylogenetic signals in both taxa imply similar evolutionary histories. Surface populations may have been driven into subterranean refugia by the cessation of flow in the rivers, associated with Tertiary climate change, while morphological evolution may have been constrained by stabilising selection. The lack of congruence between molecular diversity and morphology raises important practical issues for conservation.
Collapse
Affiliation(s)
- T L Finston
- School of Animal Biology (M092), University of Western Australia, Crawley, Western Australia, Australia.
| | | | | | | | | |
Collapse
|
10
|
Population genetics of the freshwater mussel, Amblema plicata (Say 1817) (Bivalvia: Unionidae): Evidence of high dispersal and post-glacial colonization. CONSERV GENET 2006. [DOI: 10.1007/s10592-006-9175-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
11
|
Finn DS, Theobald DM, Black WC, Poff NL. Spatial population genetic structure and limited dispersal in a Rocky Mountain alpine stream insect. Mol Ecol 2006; 15:3553-66. [PMID: 17032257 DOI: 10.1111/j.1365-294x.2006.03034.x] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Using the mitochondrial cytochrome oxidase I (COI) gene, we assessed the phylogeographic structure of Prosimulium neomacropyga, a black fly (Simuliidae) whose distribution in the US Southern Rockies ecoregion is limited to alpine tundra streams. Given high habitat specificity, lack of hydrological connection between streams, and a terrestrial environment restrictive to insect flight, we hypothesized limited gene flow. A spatially nested sampling design showed that grouping populations according to high-elevation 'islands' of alpine tundra (which typically include headwater streams of > 1 watershed) explained a significant proportion of genetic variation while grouping streams according to major watershed (across islands) did not. Nested clade analysis and isolation-by-distance (IBD) relationships further implicated limited ongoing gene flow within but not among the isolated alpine islands. IBD was strong among five streams within an individual island using each of four alternative models of pairwise landscape connectivity for flying insects. Results of all landscape models were positively correlated, suggesting that straight-line distance is an acceptable surrogate for presumably more biologically meaningful connectivity measures in this system. IBD was significantly weaker across the entire study area, comprised of three separate islands. Overall, population structure was significant with F(ST) = 0.38, suggesting limited dispersal across a small spatial extent.
Collapse
Affiliation(s)
- Debra S Finn
- Department of Biology and Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523, USA.
| | | | | | | |
Collapse
|
12
|
Heilveil JS, Berlocher SH. Phylogeography of postglacial range expansion in Nigronia serricornis Say (Megaloptera: Corydalidae). Mol Ecol 2006; 15:1627-41. [PMID: 16629816 DOI: 10.1111/j.1365-294x.2006.02876.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
We have examined the effects of post-Wisconsinan glacial range expansion on the phylogeography of the saw-combed fishfly, Nigronia serricornis Say (Megaloptera: Corydalidae) because aquatic insects are under-represented in postglacial studies (and in phylogeography in general), and because the effects of ecological degradation on the population genetics of environmental indicator species like N. serricornis cannot be measured unless the underlying phylogeography is understood. Sequence data from a 630-base fragment of the mitochondrial cytochrome oxidase I (COI) gene were subjected to amova and nested clade analysis for 30 populations (n = 344) of N. serricornis. Both the amova and nested clade analysis revealed substantial population structure; 44.4% of the variance occured among populations. Three northward migrations are apparent: one from Tennessee into Illinois, Indiana, Wisconsin, Michigan and Ontario, a second that radiated eastward from Pennsylvania, and a third that moved along the coast from North Carolina into Connecticut, Massachusetts, Maine and then into New York. The latter two of these migrations were the result of contiguous range expansions, while the former expansion, out of Tennessee, appears to have been rapid with little gene flow from the source population. Additional clades included a group of haplotypes in central Kentucky that appear to have expanded along preglacial drainages, and clades in North Carolina and Georgia that have remained centrally located. Haplotype diversity decreased from south to north, a pattern that has been widely reported for animal and plant populations that expanded with the retreat of the Wisconsinan glaciation.
Collapse
Affiliation(s)
- J S Heilveil
- Department of Entomology, University of Illinois 320 Morrill Hall, Urbana, 61801, USA.
| | | |
Collapse
|