Interspecific hybridization in sympatric species of Daphnia inhabiting lakes in northeastern Poland

2012 ◽  
Vol 41 (2) ◽  
pp. 1-6 ◽  
Author(s):  
Tomasz Brzeziński ◽  
Jan Fronk ◽  
Joanna Trzcińska-Danielewicz ◽  
Piotr Dawidowicz
Keyword(s):  
Interspecific Hybrids ◽  
Sympatric Species ◽  
Total Abundance ◽  
Daphnia Galeata ◽  
Daphnia Longispina ◽  
Complex Deficiency ◽  
Daphnia Longispina Complex ◽  
Northeastern Poland ◽  
Daphnia Hyalina ◽  
Daphnia Cucullata

AbstractPopulations of three sympatric species (Daphnia cucullata, Daphnia galeata, and Daphnia hyalina (Daphnia longispina complex)) inhabiting three lakes in northeastern Poland (Roś, Mikołajskie, Wigry) were checked for interspecific hybrids. Hybrid Daphnia coexisting with parental individuals were detected in each of the investigated lakes. Several classes of hybrids (F1, F2, backcrosses), including D. cucullata×galeata×hyalina individuals, have been detected. Hybrids constituted a substantial (13%–38%) part of the total abundance of individuals of the D. longispina complex. Deficiency of heterozygotes (hybrids) detected may indicate the existence of barriers for gene flow between the sympatric Daphnia taxa.

scholarly journals Phenotypic plasticity and developmental noise in hybrid and parental clones of Daphnia longispina complex

2021 ◽  
Author(s):  
Piotr Bernatowicz ◽  
Piotr Dawidowicz ◽  
Joanna Pijanowska
Keyword(s):  
Phenotypic Plasticity ◽  
Stress Factors ◽  
Cylindrospermopsis Raciborskii ◽  
Daphnia Galeata ◽  
Fitness Advantage ◽  
Hybrid Superiority ◽  
Daphnia Longispina Complex ◽  
Daphnia Hyalina ◽  
Developmental Noise ◽  
Hybrid Clones

AbstractAccording to the “temporal hybrid superiority hypothesis”, seasonal variability in environmental factors in temperate lakes gives hybrid clones within the D. longispina complex a temporary fitness advantage, thus allowing long-term, dynamic coexistence of hybrids and maternal taxa. However, the maintenance of hybrids would not require their superiority under any given set of environmental conditions if their average fitness over longer periods surpassed that of more specialized and less flexible parental clones. Phenotypic plasticity and developmental noise of several hybrid and maternal clones of Daphnia (Daphnia galeata, Daphnia hyalina, their hybrids and backcrosses) were compared in a series of laboratory experiments. Changes in depth selection and body size at first reproduction were scored in Daphnia exposed to predator (planktivorous fish) threat, to the presence of filamentous cyanobacteria (Cylindrospermopsis raciborskii), and to the presence of toxic compounds (PCB52 and PCB153). The hybrid clones were found to exhibit the broadest phenotypic plasticity of the studied traits in response to the different stress factors. Developmental noise in depth selection behaviour was the lowest in Daphnia galeata, the highest in Daphnia hyalina, and intermediate in hybrid and backcross clones. This diversity of reaction norms might permit the coexistence of closely related Daphnia clones in the variable and often unpredictable lake environment.

scholarly journals Daphnia hybridization along ecological gradients in pelagic environments: the potential for the presence of hybrid zones in plankton

2008 ◽  
Vol 363 (1505) ◽  
pp. 2931-2941 ◽  
Author(s):  
Adam Petrusek ◽  
Jaromír Seda ◽  
Jiří Macháček ◽  
Štěpánka Ruthová ◽  
Petr Šmilauer
Keyword(s):  
Environmental Gradients ◽  
Fish Predation ◽  
Hybrid Zones ◽  
Daphnia Galeata ◽  
Daphnia Longispina ◽  
Selective Predation ◽  
Second Year ◽  
Daphnia Cucullata ◽  
Substantial Decline ◽  
Spatially Varying

The relative homogeneity of pelagic environments has been regarded as the reason for the absence of hybrid zones for hybridizing planktonic Daphnia (Crustacea: Cladocera); occasional dominance of interspecific hybrids over parental species was explained by their temporal superiority in fluctuating environments. However, water bodies with spatially varying environmental conditions might facilitate the formation of hybrid zones in plankton. We studied the distribution of species and hybrids of the Daphnia longispina complex in 11 canyon-shaped reservoirs, localities characterized by horizontal environmental gradients (particularly of food supply and size-selective predation); we also analysed patterns of carapace size and fecundity among coexisting taxa. Spatial distribution of taxa agreed with their ecological characteristics; those showing different affinities along longitudinal reservoir profiles differed in size according to the presumed fish predation gradient. Only hybrids of Daphnia galeata with Daphnia cucullata and D. longispina (= hyalina ) were recorded. The latter two species preferred opposite ends of gradients, such spatial segregation probably explaining the absence of their hybrids. Distributional patterns were relatively stable in two consecutive summers, apart from a substantial decline of D. galeata × cucullata in the second year. The observed pattern of a hybrid-dominated zone in intermediate conditions suggests that local Daphnia hybrid zones may indeed form within reservoirs.

scholarly journals New possibilities arise for studies of hybridization: SNP-based markers for the multi-species Daphnia longispina complex derived from transcriptome data

2015 ◽  
Vol 37 (3) ◽  
pp. 626-635 ◽  
Author(s):  
Jakub Rusek ◽  
Gökce B. Ayan ◽  
Patrick Turko ◽  
Christoph Tellenbach ◽  
Sabine Giessler ◽  
...  
Keyword(s):  
Transcriptome Data ◽  
Daphnia Longispina ◽  
Daphnia Longispina Complex

Seasonal isolation as a reproductive barrier among sympatric Salix species

1989 ◽  
Vol 67 (9) ◽  
pp. 2563-2570 ◽  
Author(s):  
A. Mosseler ◽  
C. S. Papadopol
Keyword(s):  
Interspecific Hybrids ◽  
Parental Species ◽  
Thermal Control ◽  
Flowering Phenology ◽  
Sympatric Species ◽  
Reproductive Barrier ◽  
Growing Degree Days ◽  
Degree Days ◽  
Willow Species ◽  
Salix Bebbiana

Differences in flowering phenology may be an important premating reproductive barrier between willow species. The seven sympatric species studied fall into two flowering groups within which there is substantial seasonal overlap: an early flowering group that includes Salix bebbiana Sarg., Salix discolor Muhl., Salix eriocephala Michx., and Salix petiolaris Smith, and a later flowering group that includes Salix amygdaloides Anderss., Salix exigua Nutt., and Salix lucida Muhl. The species flowering sequence was reasonably consistent over the 3-year period from 1984 to 1986. Thermal control over flowering phenology was related to cumulative growing degree-days. The inheritance of phenological responses in artificially produced F1 interspecific hybrids was intermediate between that of the parental species.

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