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

Brzeziński, Tomasz; Fronk, Jan; Trzcińska-Danielewicz, Joanna; Dawidowicz, Piotr

doi:10.2478/s13545-012-0011-5

Cited by 7 publications

(6 citation statements)

References 25 publications

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“…Moreover, our results suggest that oxygen deficits in low trophic conditions could even increase the crustacean diversity as they created niches for small-bodied Cladocera. This is an interesting phenomenon as most often the opposite is true, where a well-oxygenated hypolimnion zone promotes a large diversity of crustacean zooplankton due to vertical niche segregation [16,81,92]. Our results also confirm this idea, as most of the lakes without oxygen depletion supported planktonic glacial relicts that have high habitat requirements.…”

Section: Discussionsupporting

confidence: 75%

Zooplankton Community Responses to Oxygen Stress

Karpowicz

Ejsmont-Karabin

Kozłowska

et al. 2020

Water

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Recent changes in climate and eutrophication have caused increases in oxygen depletion in both freshwater and marine ecosystems. However, the impact of oxygen stress on zooplankton, which is the major trophic link between primary producers and fish, remains largely unknown in lakes. Therefore, we studied 41 lakes with different trophic and oxygen conditions to assess the role of oxygen stress on zooplankton communities and carbon transfer between phytoplankton and zooplankton. Samples were collected from each lake at the peak of summer stratification from three depth layers (the epilimnion, metalimnion, and hypolimnion). Our results revealed that freshwater zooplankton were relatively tolerant to anoxic conditions and the greatest changes in community structure were found in lakes with the highest oxygen deficits. This caused a switch in dominance from large to small species and reduced the zooplankton biomass in lower, anoxic layers of water, but not in the upper layers of water where the oxygen deficits began. This upper anoxic layer could thus be a very important refuge for zooplankton to avoid predation during the day. However, the reduction of zooplankton in the lower water layers was the main factor that reduced the effectiveness of carbon transfer between the phytoplankton and zooplankton.

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Section: Discussionsupporting

confidence: 75%

Zooplankton Community Responses to Oxygen Stress

Karpowicz

Ejsmont-Karabin

Kozłowska

et al. 2020

Water

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“…The cladoceran D. cucullata is widely distributed and very frequently reported from the whole of Europe and often dominates in lakes where fish predation is intense, due to a completely colorless body [50,[56][57][58]. Contrasting patterns of body size for coexisting Daphnia species that segregate by habitat is a well-known phenomenon [59] because they have different life-history strategies, habitat preferences, behavior, and vulnerability to predation [2,6,60,61]. The coexisting of 3-5 Daphnia species at each station of Lake Wigry has been known for a hundred years [9,62,63].…”

Section: Discussionmentioning

confidence: 99%

Diversity and Structure of Pelagic Zooplankton (Crustacea, Rotifera) in NE Poland

Karpowicz

Ejsmont-Karabin

2021

Water

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This study presents the diversity and structure of pelagic zooplankton in north-eastern Poland. The research was conducted in 47 lakes with different trophic conditions in the middle of summer. Samples were collected close to the deepest part of the lakes to avoid the diverse benthic and littoral zones. We found 119 zooplankton species of which 32 were Cladocera, 16 were Cyclopoida, 4 were Calanoida, and 67 were Rotifera. We determined which species occurred most frequently in the region, as well as the species that were characteristic of different trophic conditions. We also recorded the presence of eight cold-adapted species which some of them are considered as glacial relicts (e.g., Eurytemora lacustris, Heterocope appendiculata, Cyclops lacustris). Our research revealed potential glacial refugia for planktonic species in 14 lakes of NE Poland. Our study suggests that the presence of stenotherm species may be an excellent indicator of the ecological status of deep lakes and could be considered in lake monitoring programs. Furthermore, we did not find Bythotrephes longimanus which has been reported from Poland. Instead, we found that B. brevimanus was the most common representative of the genus in the study area.

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“…They originated from Lake Ro s (21°52 0 E, 53°43 0 N; Poland)a dimictic eutrophic lake, and from Lake Constance (9°18 0 E, 47 o 39 0 N; Germany)a monomictic oligo-mesotrophic lake. In both lakes, species of the D. longispina complex coexist with their hybrids (Weider & Stich, 1992;Brzezi nski et al, 2012). In Lake Ro s, filamentous and colonial cyanobacteria dominate in summer, with average abundances 10 3 -10 4 filaments mL À1 and filamentous forms comprising 33-76% of the phytoplankton biomass (Witeska, 1987;own unpubl.…”

Section: Methodsmentioning

confidence: 99%

“…In the genus Daphnia, the keystone freshwater pelagic grazer, hybridisation among closely related sympatric species is a widely reported phenomenon (Wolf & Mort, 1986;Benzie, 2005). The hybrids formed by D. galeata (Sars), D. cucullata (Sars) and D. hyalina (Leydig), grouped together with the parental species in the D. longispina complex, are common in lowland European lakes (Schwenk & Spaak, 1997;Benzie, 2005;Brzezi nski et al, 2012). Species within the D. longispina complex are cyclic parthenogens, thus a single hybridisation event is sufficient to establish hybrid lineage that theoretically may exist permanently.…”

Section: Introductionmentioning

confidence: 99%

Filamentous cyanobacteria alter the relative fitness in a Daphnia hybrid species complex

Brzeziński

2014

Freshwater Biology

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Summary Interspecific hybridisation is common in freshwater cladocerans. Within the Daphnia longispina complex hybrids frequently dominate over parental species, and environmental heterogeneity in the pelagial of lakes has been invoked to explain the coexistence of hybrids and parental species. In laboratory conditions, I investigated the effects of filamentous cyanobacteria on the relative fitness of Daphnia hyalina, Daphnia galeata and Daphnia hyalina×galeata hybrids. For each taxon, the performance of three clones was measured using animals fed with two diets: (i) a mixture of the filamentous cyanobacterium Cylindrospermopsis raciborskii and the green alga Scenedesmus obliquus and (ii) Scenedesmus obliquus in non‐limiting concentration. Inter‐ and intraspecific differences in ability to cope with cyanobacterial filaments were found; hybrids were, on average, superior to parental species in the absence of filaments, but in the presence of filaments one of the parental species (D. hyalina) was superior, while performance of hybrids did not differ from D. galeata. No relationship was found between size at first reproduction (range 1.3–2.0 mm) and reduced fitness due to the presence of cyanobacterial filaments. Shifts in relative fitness of daphnids due to variation in food quality, mediated by the presence of filamentous cyanobacteria, may promote coexistence of hybrids and parental species of the D. longispina complex.

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

Cited by 7 publications

References 25 publications

Zooplankton Community Responses to Oxygen Stress

Zooplankton Community Responses to Oxygen Stress

Diversity and Structure of Pelagic Zooplankton (Crustacea, Rotifera) in NE Poland

Filamentous cyanobacteria alter the relative fitness in a Daphnia hybrid species complex

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