Jukka Kekäläinen
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View article: Combined Impact of Nanoplastics and Temperature on Green Algae: Implications for Growth, Lipid Content and Organic Exudates
Combined Impact of Nanoplastics and Temperature on Green Algae: Implications for Growth, Lipid Content and Organic Exudates Open
Freshwater ecosystems are under significant environmental stress due to warming and plastic pollution. However, our understanding of their combined effects on primary producers is scarce. We investigated the effects of plain spherical poly…
View article: Microbial Responses to Micronutrient Amendments in Oxygenated and Deoxygenated Waters of the Arabian Sea
Microbial Responses to Micronutrient Amendments in Oxygenated and Deoxygenated Waters of the Arabian Sea Open
Metalloenzyme cofactors and oxygen conditions are crucial for microbial metabolism, yet their combined effects on microbial ecosystems remain unexplored. This study explores the impact of micronutrient amendments (Zn, Fe, Co and their comb…
View article: Putting Nose into Reproduction: Influence of Nasal and Reproductive Odourant Signaling on Male Reproduction
Putting Nose into Reproduction: Influence of Nasal and Reproductive Odourant Signaling on Male Reproduction Open
Odourant receptors (ORs) are not restricted only to the nose, but also occur in many other organs and tissues, including the reproductive system. In fact, ORs are the most heavily expressed in testis than in any other extra‐nasal tissue. A…
View article: Effects of polymethylmethacrylate nanoplastics on the swimming behaviour and gut microbiome of the freshwater amphipod Gammarus pulex
Effects of polymethylmethacrylate nanoplastics on the swimming behaviour and gut microbiome of the freshwater amphipod Gammarus pulex Open
Plastic pollution has posed a significant environmental concern being widely spread in terrestrial and aquatic ecosystems. Nanoplastic particles (NPs: <1000 nm) have been drawing attention for their potential toxicological implications on …
View article: Female reproductive tract microbiota varies with MHC profile
Female reproductive tract microbiota varies with MHC profile Open
Numerous studies have shown that a healthy reproductive tract microbiota is crucial for successful reproduction and that its composition is influenced by various environmental and host factors. However, it is not known whether the reproduc…
View article: Comparative analysis of microbiome inhabiting oxygenated and deoxygenated habitats using V3 and V6 metabarcoding of 16S rRNA gene
Comparative analysis of microbiome inhabiting oxygenated and deoxygenated habitats using V3 and V6 metabarcoding of 16S rRNA gene Open
We examine how oxygen levels and the choice of 16S ribosomal RNA (rRNA) tags impact marine bacterial communities using Next-Generation amplicon sequencing. Analyzing V3 and V6 regions, we assess microbial composition in both Oxygen minimum…
View article: Selection among critically endangered landlocked salmon (<i>Salmo salar</i> m. <i>sebago</i>) families in survival and growth traits across early life stages and in different environments
Selection among critically endangered landlocked salmon (<i>Salmo salar</i> m. <i>sebago</i>) families in survival and growth traits across early life stages and in different environments Open
Endangered wild fish populations are commonly supported by hatchery propagation. However, hatchery‐reared fish experience very different selective pressures compared to their wild counterparts, potentially causing genotype‐by‐environment i…
View article: Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids
Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids Open
Threatened fish populations worldwide are relying on stock supplementation by hatchery‐reared fish. Although stocking with non‐native fish may lead to hybridization, thereby disrupting local adaptations, it could also improve the adaptive …
View article: Data Jokiniemi et al. 2023
Data Jokiniemi et al. 2023 Open
Original data of the publication Jokiniemi et al.
View article: Diversity and Quantitative Detection of Clade I Type <i>nosZ</i> Denitrifiers in the Arabian Sea Oxygen Minimum Zone
Diversity and Quantitative Detection of Clade I Type <i>nosZ</i> Denitrifiers in the Arabian Sea Oxygen Minimum Zone Open
A significant amount of nitrous oxide (N2O) is effluxed into the atmosphere as a result of marine denitrification in the Arabian Sea (AS) oxygen minimum zone (OMZ). An assessment of temporal variations in the diversity and abundance of nos…
View article: “Advanced materials” and the challenges on the horizon for testing their (eco)toxicity and assessing their hazard
“Advanced materials” and the challenges on the horizon for testing their (eco)toxicity and assessing their hazard Open
“Advanced Materials” (AdMas) represent the next technology frontier.
View article: Submicron Plastic Adsorption by Peat, Accumulation in Sphagnum Mosses and Influence on Bacterial Communities in Peatland Ecosystems
Submicron Plastic Adsorption by Peat, Accumulation in Sphagnum Mosses and Influence on Bacterial Communities in Peatland Ecosystems Open
The smallest fraction of plastic pollution, submicron plastics (SMPs Sphagnum moss and the composition and diversity of the microbial communities in peatland. Natural organic matter (NOM), which adsorbs from the surrounding water to the su…
View article: Extended in vitro storage of eggs and milt increases maternal but not paternal variation in embryo viability of landlocked Atlantic salmon (Salmo salar m. sebago)
Extended in vitro storage of eggs and milt increases maternal but not paternal variation in embryo viability of landlocked Atlantic salmon (Salmo salar m. sebago) Open
Appropriate fertilization practices play a crucial role in the maintenance of genetic diversity within captive fish broodstocks. We assessed the influence of in vitro storage of gametes (0-, 7- and 14-days post-stripping) at 1 °C on ovaria…
View article: Infertility: a pathologic condition or selection against genetic incompatibility?
Infertility: a pathologic condition or selection against genetic incompatibility? Open
Infertility is currently regarded as a male or female-dependent pathologic condition. However, emerging evidence suggests that this may be an incomplete view as it misses the important fact that the gametes of some males and females often …
View article: Cryptic female choice within individual males – A neglected component of the postmating sexual selection?
Cryptic female choice within individual males – A neglected component of the postmating sexual selection? Open
Cryptic female choice (CFC) is commonly assumed to act only in polyandrous mating systems, which allows females to bias fertilization towards the sperm of particular males. However, accumulated evidence has demonstrated that sperm show sig…
View article: Exposure of gametes to aged nano-sized plastic particles during fertilization can influence early larval development in the European whitefish (Coregonus lavaretus)
Exposure of gametes to aged nano-sized plastic particles during fertilization can influence early larval development in the European whitefish (Coregonus lavaretus) Open
Plastic pollution has been a growing environmental concern for decades, increasingly affecting both marine and freshwater ecosystems worldwide. Nano-sized plastic particles (NPs) potentially have various toxicological impacts on aquatic or…
View article: Seminal-Plasma-Mediated Effects on Sperm Performance in Humans
Seminal-Plasma-Mediated Effects on Sperm Performance in Humans Open
Seminal plasma (SP) plays a crucial role in reproduction and contains a large number of proteins, many of which may potentially modify sperm functionality. To evaluate the effects of SP identity and its protein composition on human sperm f…
View article: Sperm Physiological Response to Female Serum—Potential New Insights into the Reproductive Incompatibility Diagnostics
Sperm Physiological Response to Female Serum—Potential New Insights into the Reproductive Incompatibility Diagnostics Open
Infertility is assumed to arise exclusively from male- and female-dependent pathological factors. However, recent studies have indicated that reproductive failure may also result from the reproductive incompatibility of the partners. Selec…
View article: Female‐induced selective modification of sperm protein SUMOylation—potential mechanistic insights into the non‐random fertilization in humans
Female‐induced selective modification of sperm protein SUMOylation—potential mechanistic insights into the non‐random fertilization in humans Open
In many species, mate choice continues after the mating via female‐ or egg‐derived biochemical factors that induce selective changes in sperm pre‐fertilization physiology and behaviour. Recent studies have indicated that gamete‐mediated ma…
View article: Pre-fertilization exposure of sperm to nano-sized plastic particles decreases offspring size and swimming performance in the European whitefish (Coregonus lavaretus)
Pre-fertilization exposure of sperm to nano-sized plastic particles decreases offspring size and swimming performance in the European whitefish (Coregonus lavaretus) Open
Exposure of aquatic organisms to micro- and nano-sized plastic debris in their environment has become an alarming concern. Besides having a number of potentially harmful impacts for individual organisms, plastic particles can also influenc…
View article: Genetic incompatibility of the reproductive partners: an evolutionary perspective on infertility
Genetic incompatibility of the reproductive partners: an evolutionary perspective on infertility Open
In natural fertilisation, the female reproductive tract allows only a strictly selected sperm subpopulation to proceed in the vicinity of an unfertilised oocyte. Female-mediated sperm selection (also known as cryptic female choice (CFC)) i…