Clonal Diversity in High-Arctic Populations of Daphnia pulex, A Polyploid Apomictic Complex

Evolution ◽  
1987 ◽  
Vol 41 (6) ◽  
pp. 1335 ◽  
Author(s):  
Lawrence J. Weider ◽  
Margaret J. Beaton ◽  
Paul D. N. Hebert
Keyword(s):  
Daphnia Pulex ◽  
Clonal Diversity ◽  
High Arctic

scholarly journals Clonal diversity in high arctic ostracodes

1997 ◽  
Vol 10 (2) ◽  
pp. 233-252 ◽  
Author(s):  
T. J. Little ◽  
P. D. N. Hebert
Keyword(s):  
Clonal Diversity ◽  
High Arctic

scholarly journals Polygenic variation in sexual investment across an ephemerality gradient in Daphnia pulex

2021 ◽  
Author(s):  
Karen B Barnard-Kubow ◽  
Dörthe Becker ◽  
Connor S Murray ◽  
Robert Porter ◽  
Grace Gutierrez ◽  
...  
Keyword(s):  
Reproductive Strategy ◽  
Evolutionary Dynamics ◽  
Daphnia Pulex ◽  
Clonal Diversity ◽  
Basic Question ◽  
Male Production ◽  
Dynamic Nature ◽  
Quantitative Genetic ◽  
History Of ◽  
Polygenic Variation

Species across the tree of life can switch between asexual and sexual reproduction. In facultatively sexual species, the ability to switch between reproductive modes is often environmentally dependent and subject to local adaptation. However, the ecological and evolutionary factors that influence the maintenance and turnover of polymorphism associated with facultative sex remain unclear. To address this basic question, we studied the ecological and evolutionary dynamics of polymorphism in reproductive strategy in a metapopulation of the model facultative sexual, Daphnia pulex, located in the southern United Kingdom. We found that patterns of clonal diversity, but not genetic diversity varied with ephemerality. Reconstruction of a multi-year pedigree demonstrated the co-existence of clones that were found to differ in their investment into male production. Mapping of quantitative variation in male production using lab-generated and field-collected individuals identified multiple putative QTL underlying this trait, and we identified a plausible candidate gene. The evolutionary history of these QTL suggests that they are relatively young, and male limitation in this system is a rapidly evolving trait. Our work highlights the dynamic nature of the genetic structure and composition of facultative sex across space and time and suggests that quantitative genetic variation in reproductive strategy can undergo rapid evolutionary turnover.

scholarly journals Cladocera from the Sediment of High Arctic Lake in Svalbard (Norway)

2021 ◽  
Vol 23 (2) ◽  
pp. 13-20
Author(s):  
Vartika Singh ◽  
Sophia Barinova
Keyword(s):  
Hot Spots ◽  
Surface Sediments ◽  
Daphnia Pulex ◽  
High Arctic ◽  
Freshwater Ecosystems ◽  
Climate Conditions ◽  
Chydorus Sphaericus ◽  
Cladoceran Remains ◽  
The Impact ◽  
Palaeoenvironmental Conditions

Abstract The High Arctic Region’s freshwater ecosystems serve as hot spots to study the impact of extreme warming conditions on the biota. The cladoceran remains have been recovered from the surface sediments of a non-marine water body near Ny-Alesund, Svalbard, Norway. The cladoceran (crustaceans) belongs to the Chydorus sphaericus group Frey, 1980 and Daphnia pulex Leydig, 1860. The ecology of the species suggests that they lived in a well-developed ecosystem with Water Quality Class 3. This study has implications for understanding the response of the present-day biota experiencing the changing climate conditions and using these remains for assessing palaeoenvironmental conditions.

Polyphyletic Origins of Asexuality in Daphnia pulex. I. Breeding-System Variation and Levels of Clonal Diversity

Evolution ◽  
1989 ◽  
Vol 43 (5) ◽  
pp. 1004 ◽  
Author(s):  
Paul D. N. Hebert ◽  
Margaret J. Beaton ◽  
Steven S. Schwartz ◽  
David J. Stanton
Keyword(s):  
Breeding System ◽  
Daphnia Pulex ◽  
Clonal Diversity

scholarly journals CLONAL-DIVERSITY PATTERNS AND BREEDING-SYSTEM VARIATION IN DAPHNIA PULEX , AN ASEXUAL-SEXUAL COMPLEX

Evolution ◽  
1988 ◽  
Vol 42 (1) ◽  
pp. 147-159 ◽  
Author(s):  
Paul D. N. Hebert ◽  
Robert D. Ward ◽  
Lawrence J. Weider
Keyword(s):  
Breeding System ◽  
Daphnia Pulex ◽  
Clonal Diversity ◽  
Diversity Patterns

Clonal diversity in high arctic ostracodes

1997 ◽  
Vol 10 (2) ◽  
pp. 233 ◽  
Author(s):  
T. J. Little ◽  
P. D. N. Hebert
Keyword(s):  
Clonal Diversity ◽  
High Arctic

scholarly journals Invertebrate communities of the High Arctic ponds in Hornsund

2016 ◽  
Vol 37 (1) ◽  
pp. 105-119 ◽  
Author(s):  
Tomi P. Luoto ◽  
Mimmi Oksman ◽  
Antti E.K. Ojala
Keyword(s):  
Climate Change ◽  
Aquatic Vegetation ◽  
Environmental Variability ◽  
Daphnia Pulex ◽  
High Arctic ◽  
Environmental Drivers ◽  
Invertebrate Communities ◽  
Background Data ◽  
Marine Influence

AbstractHow environmental conditions influence current distributions of organisms at the local scale in sensitive High Arctic freshwaters is essential to understand in order to better comprehend the cascading consequences of the ongoing climate change. This knowledge is also important background data for paleolimnological assessments of long-term limnoecological changes and in describing the range of environmental variability. We sampled five limnologically different freshwater sites from the Fuglebergsletta marine terrace in Hornsund, southern Svalbard, for aquatic invertebrates. Invertebrate communities were tested against non-climatic environmental drivers as limnological and catchment variables. A clear separation in the communities between the sites was observed. The largest and deepest lake was characterized by a diverse Chironomidae community but Cladocera were absent. In a pond with marine influence, crustaceans, such as Ostracoda, Amphipoda, and calanoid Copepoda were the most abundant invertebrates. Two nutrient-rich ponds were dominated by a chironomid,Orthocladius consobrinus, whereas themost eutrophic pond was dominated by the cladoceranDaphnia pulex, suggesting decreasing diversity along with the trophic status. Overall, nutrient related variables appeared to have an important influence on the invertebrate community composition and diversity, the trophic state of the sites being linked with their exposure to geese guano. Other segregating variables included water color, presence/absence of fish, abundance of aquatic vegetation and lake depth. These results suggest that since most of these variables are climate-driven at a larger scale, the impacts of the ongoing climate change will have cumulative effects on aquatic ecosystems.

scholarly journals CLONAL DIVERSITY IN HIGH-ARCTIC POPULATIONS OFDAPHNIA PULEX, A POLYPLOID APOMICTIC COMPLEX

Evolution ◽  
1987 ◽  
Vol 41 (6) ◽  
pp. 1335-1346 ◽  
Author(s):  
Lawrence J. Weider ◽  
Margaret J. Beaton ◽  
Paul D. N. Hebert
Keyword(s):  
Clonal Diversity ◽  
High Arctic

scholarly journals Clonal diversity in populations of Daphnia pulex reproducing by obligate parthenogenesis

Heredity ◽  
1983 ◽  
Vol 51 (1) ◽  
pp. 353-369 ◽  
Author(s):  
Paul D N Hebert ◽  
Teri Crease
Keyword(s):  
Daphnia Pulex ◽  
Clonal Diversity
Sign in / Sign up

Export Citation Format

Share Document