Egg morphology may underpin the successful distribution of large branchiopods in temporary waters

Meyer-Milne, Elizabeth; Brendonck, Luc; Pinceel, Tom

doi:10.1007/s10452-020-09826-1

Cited by 7 publications

(2 citation statements)

References 77 publications

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“…When ornaments exist at the surface of resting eggs may be a deterrent for egg predators such as planarians (Dumont et al 2002), which is not the case for B. media resting eggs that have smooth surface. Recent investigations sustain the idea that eggs ornamentation combined with size determine their dispersion capacity, but the mode of laying and ovisac' shape have not been taken into account (Meyer-Milne et al 2021).…”

Section: Discussionmentioning

confidence: 99%

Resting eggs bank and their hatching pattern in two co-occuring anostracans Phallocryptus spinosus (Milne-Edwards, 1840) and Branchinectella media (Schmankewitsch, 1873) (Crustacea) from saline lakes of the Aurès region (Northeastern Algeria)

Rais,

Amarouayache,

Rochon

2023

Preprint

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Phallocryptus spinosus (Milne-Edwards, 1840) and Branchinectella media (Schmankewitsch, 1873) are two anostracan species co-occurring in several saline lakes of the eastern steppic zone of Algeria. Both species produce resting eggs to persist in their temporary and unstable habitats, constituting a resting eggs bank. B. media has a restricted distribution worldwide and it is known to prefer cold temperatures (16 °C max). Resting egg banks and hatching patterns of both species have been assessed in seven saline lakes. Results showed that densities of P. spinosus resting eggs were always higher than those of B. media, whatever the lake (F = 4.66, P = 0.0005). They range between 93000 ± 75 and 1495000 ± 366.5 resting eggs.m-2 for P. spinosus, and between 670 ± 30 and 365000 ± 268 resting eggs.m-2 for B. media. Hatching percentages of eggs incubated at temperatures of 16 °C and 22 °C, and salinities of 0 and 5 psu, showed that 16 °C and 5 psu was the most suitable combination for B. media, where 38.88 ± 1.93% of eggs hatched under these conditions. For P. spinosus, 81.11 ± 1.92% of eggs hatched at 22 °C and 5 psu. Resting eggs diameters measurements of both species as well as scanning electron micrographs of B. media are provided.

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Section: Discussionmentioning

confidence: 99%

Resting eggs bank and their hatching pattern in two co-occuring anostracans Phallocryptus spinosus (Milne-Edwards, 1840) and Branchinectella media (Schmankewitsch, 1873) (Crustacea) from saline lakes of the Aurès region (Northeastern Algeria)

Rais,

Amarouayache,

Rochon

2023

Preprint

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“…Recently, Meyer‐Milne et al. (2021) found a relation between cyst morphologies and geographic size range in South African large branchiopods. Cysts with larger sizes and/or without surface ornamentations showed larger distributional ranges, possibly due to wind‐mediated dispersal.…”

Section: Discussionmentioning

confidence: 99%

Distinctive genetic signatures of two fairy shrimp species with overlapping ranges in Iberian temporary ponds

et al. 2021

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Temporary lentic water bodies host biotic assemblages adapted to the transient nature of these freshwater habitats. Fairy shrimps (Crustacea, Branchiopoda, Anostraca) are one of the most important biological components of these unique environments and have a fossil record dating back to the Middle Jurassic (>150 million years). Some anostracan species show a geographically restricted distribution, whereas others are widely dispersed. We aimed to investigate the relationship between different geographic extents and patterns of genetic structure in species of Anostraca. Following this objective, we selected two species with contrasting ranges but overlapping geographic distributions and similar life‐history traits in the study area. We analysed additional information that, from an ecological (e.g. egg‐bank, niche breadth, and pond connectivity) and evolutionary (e.g. crown‐group age of each species) perspective, may explain the obtained phylogeographic patterns. Between 2005 and 2018, we sampled two species of fairy shrimps (309 specimens of Branchipus cortesi and 264 specimens of Tanymastix stagnalis) from 53 temporary ponds of Portugal. We added five other locations from Spain and France to include other European locations for T. stagnalis. Additionally, we also sampled Branchipus schaefferi from two temporary water bodies (Spain and Morocco) to include in the dating analysis. Reconstructed phylogenies based on mitochondrial sequence data indicate the existence of deeply divergent clades with an unequivocal phylogeographic structure in T. stagnalis and shallower divergences in B. cortesi with a less clear geographic correspondence. We found evidence of frequent local and rare long‐distance dispersal events in both species and limited intermediate dispersal, which was more common in B. cortesi. A Bayesian dating analysis using the Branchiopoda fossil record estimated the age of the most recent common ancestors of T. stagnalis and B. cortesi at 32.4 and 12.8 million years, respectively. Haplotype accumulation curves indicated that only a portion of the genetic composition of the species was sampled on each hydroperiod and showed the existence of large, genetically diverse egg banks that remain in the soil. These egg banks represent a genetic reservoir that guarantees the survival of the species because active populations from different hydroperiods may be genetically different and adapt to a changing environment. We hypothesise that the contrasting phylogeographic patterns displayed by the two fairy shrimp species may result from: (1) the earlier age of the most recent common ancestor of T. stagnalis, as older species have more time to accumulate mutations and, thus, are expected to exhibit higher genetic differentiation among populations; (2) slight differences in adult behaviour, life‐history traits and cyst morphologies of T. stagnalis and B. cortesi favouring different animal dispersal vectors with distinct dispersal abilities. Therefore, phylogeographic patterns may be explained by both evolutionary...

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Processes contributing to rotifer community assembly in shallow temporary aridland waters

et al. 2022

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Egg morphology may underpin the successful distribution of large branchiopods in temporary waters

Cited by 7 publications

References 77 publications

Resting eggs bank and their hatching pattern in two co-occuring anostracans Phallocryptus spinosus (Milne-Edwards, 1840) and Branchinectella media (Schmankewitsch, 1873) (Crustacea) from saline lakes of the Aurès region (Northeastern Algeria)

Resting eggs bank and their hatching pattern in two co-occuring anostracans Phallocryptus spinosus (Milne-Edwards, 1840) and Branchinectella media (Schmankewitsch, 1873) (Crustacea) from saline lakes of the Aurès region (Northeastern Algeria)

Distinctive genetic signatures of two fairy shrimp species with overlapping ranges in Iberian temporary ponds

Processes contributing to rotifer community assembly in shallow temporary aridland waters

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