Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Invasion of novel habitats uncouples haplo-diplontic life cycles
Krueger-Hadfield, S.A.; Kollars, N.M.; Byers, J.E.; Greig, T.W.; Hammann, M.; Murray, D.C.; Murren, C.J.; Strand, A.E.; Terada, R.; Weinberger, F.; Sotka, E.E. (2016). Invasion of novel habitats uncouples haplo-diplontic life cycles. Mol. Ecol. 25(16): 3801-3816. https://dx.doi.org/10.1111/mec.13718
In: Molecular Ecology. Blackwell: Oxford. ISSN 0962-1083; e-ISSN 1365-294X
|  |
| Trefwoord |
Gracilaria vermiculophylla (Ohmi) Papenfuss, 1967 [WoRMS]
|
| Auteurs | | Top |
- Krueger-Hadfield, S.A.
- Kollars, N.M.
- Byers, J.E.
- Greig, T.W.
|
- Hammann, M.
- Murray, D.C.
- Murren, C.J.
- Strand, A.E.
|
- Terada, R.
- Weinberger, F.
- Sotka, E.E.
|
| Abstract |
Baker's Law predicts uniparental reproduction will facilitate colonization success in novel habitats. While evidence supports this prediction among colonizing plants and animals, few studies have investigated shifts in reproductive mode in haplo‐diplontic species in which both prolonged haploid and diploid stages separate meiosis and fertilization in time and space. Due to this separation, asexual reproduction can yield the dominance of one of the ploidy stages in colonizing populations. We tested for shifts in ploidy and reproductive mode across native and introduced populations of the red seaweed Gracilaria vermiculophylla. Native populations in the northwest Pacific Ocean were nearly always attached by holdfasts to hard substrata and, as is characteristic of the genus, haploid–diploid ratios were slightly diploid‐biased. In contrast, along North American and European coastlines, introduced populations nearly always floated atop soft‐sediment mudflats and were overwhelmingly dominated by diploid thalli without holdfasts. Introduced populations exhibited population genetic signals consistent with extensive vegetative fragmentation, while native populations did not. Thus, the ecological shift from attached to unattached thalli, ostensibly necessitated by the invasion of soft‐sediment habitats, correlated with shifts from sexual to asexual reproduction and slight to strong diploid bias. We extend Baker's Law by predicting other colonizing haplo‐diplontic species will show similar increases in asexuality that correlate with the dominance of one ploidy stage. Labile mating systems likely facilitate colonization success and subsequent range expansion, but for haplo‐diplontic species, the long‐term eco‐evolutionary impacts will depend on which ploidy stage is lost and the degree to which asexual reproduction is canalized. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
