• Klíčová slova
• COMMUNICABLE DISEASES/transmission *, FLIES *, PHOSPHORUS/radioactive *, SEWAGE *,
• MeSH
• Diptera * MeSH
• fosfor dietní * MeSH
• fosfor * MeSH
• infekční nemoci přenos   MeSH
• lidé MeSH
• odpadní vody * MeSH
• přenos infekční nemoci * MeSH
• radioaktivita * MeSH
• radioizotopy fosforu * MeSH
• radionuklidy * MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• fosfor dietní * MeSH
• fosfor * MeSH
• odpadní vody * MeSH
• radioizotopy fosforu * MeSH
• radionuklidy * MeSH

• Klíčová slova
• EYE NEOPLASMS *, PHOSPHORUS ISOTOPES *, RADIOMETRY *,
• MeSH
• fosfor * MeSH
• izotopy fosforu * MeSH
• lidé MeSH
• nádory oka * MeSH
• nádory * MeSH
• radioaktivita * MeSH
• radiometrie * MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• fosfor * MeSH
• izotopy fosforu * MeSH

• Klíčová slova
• PHOSPHORUS ISOTOPES *, RADIOTHERAPY *, UTERINE NEOPLASMS *,
• MeSH
• fosfor dietní * MeSH
• fosfor * MeSH
• izotopy fosforu * MeSH
• lidé MeSH
• nádory dělohy * MeSH
• radioaktivita * MeSH
• radioterapie * MeSH
• Check Tag
• lidé MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• fosfor dietní * MeSH
• fosfor * MeSH
• izotopy fosforu * MeSH

• Klíčová slova
• MUSCLES/metabolism *, PHOSPHORUS/metabolism *, SODIUM/metabolism *,
• MeSH
• fosfor metabolismus   MeSH
• kosterní svaly * MeSH
• lidé MeSH
• radioaktivita * MeSH
• radionuklidy * MeSH
• sodík dietní * MeSH
• sodík metabolismus   MeSH
• svaly metabolismus   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• fosfor MeSH
• radionuklidy * MeSH
• sodík dietní * MeSH
• sodík MeSH

Phosphorus (P) for carbon (C) exchange is the pivotal function of arbuscular mycorrhiza (AM), but how this exchange varies with soil P availability and among co-occurring plants in complex communities is still largely unknown. We collected intact plant communities in two regions differing c. 10-fold in labile inorganic P. After a 2-month glasshouse incubation, we measured 32P transfer from AM fungi (AMF) to shoots and 13C transfer from shoots to AMF using an AMF-specific fatty acid. AMF communities were assessed using molecular methods. AMF delivered a larger proportion of total shoot P in communities from high-P soils despite similar 13C allocation to AMF in roots and soil. Within communities, 13C concentration in AMF was consistently higher in grass than in blanketflower (Gaillardia aristata Pursh) roots, that is P appeared more costly for grasses. This coincided with differences in AMF taxa composition and a trend of more vesicles (storage structures) but fewer arbuscules (exchange structures) in grass roots. Additionally, 32P-for-13C exchange ratios increased with soil P for blanketflower but not grasses. Contrary to predictions, AMF transferred proportionally more P to plants in communities from high-P soils. However, the 32P-for-13C exchange differed among co-occurring plants, suggesting differential regulation of the AM symbiosis.

• Klíčová slova
• P‐for‐C exchange ratio, arbuscular mycorrhiza, resource allocation, soil extractable P, symbiosis,
• MeSH
• fosfor * metabolismus   MeSH
• izotopy uhlíku MeSH
• kořeny rostlin mikrobiologie   metabolismus   MeSH
• lipnicovité metabolismus   MeSH
• mykorhiza * fyziologie   metabolismus   MeSH
• půda * chemie   MeSH
• rostliny metabolismus   mikrobiologie   MeSH
• uhlík * metabolismus   MeSH
• výhonky rostlin metabolismus   MeSH
• životní prostředí MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• fosfor * MeSH
• izotopy uhlíku MeSH
• půda * MeSH
• uhlík * MeSH

• Klíčová slova
• BONE AND BONES *, CALCIUM *, CALCIUM ISOTOPES *, EXPERIMENTAL LAB STUDY *, METABOLISM *, PHOSPHORUS *, PHOSPHORUS ISOTOPES *, RABBITS *, RADIOISOTOPE SCANNING *, ULTRASONICS *,
• MeSH
• fosfor dietní * MeSH
• fosfor * MeSH
• izotopy fosforu * MeSH
• izotopy vápníku * MeSH
• kosti a kostní tkáň * MeSH
• králíci MeSH
• Lagomorpha * MeSH
• metabolismus * MeSH
• radioisotopová scintigrafie * MeSH
• radionuklidy * MeSH
• ultrazvuk * MeSH
• vápník dietní * MeSH
• vápník * MeSH
• výzkum * MeSH
• zvířata MeSH
• Check Tag
• králíci MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• fosfor dietní * MeSH
• fosfor * MeSH
• izotopy fosforu * MeSH
• izotopy vápníku * MeSH
• radionuklidy * MeSH
• vápník dietní * MeSH
• vápník * MeSH

Lake ecosystems process and cycle organic substrates, thus serving as important bioreactors in the global carbon cycle. Climate change is predicted to increase extreme weather and precipitation events that can flush nutrients and organic matter from soils to streams and lakes. Here we report changes in stable isotopes (δ2H, δ13C, δ15N, or δ18O) of water, dissolved organic matter (DOM), seston, and zooplankton in a subalpine lake at short time resolution following an extreme precipitation event between early July to mid-August 2021. Water from excess precipitation and runoff remained in the lake epilimnion and coincided with increasing δ13C values of seston (-30 ‰ to -20 ‰), due to the input of carbonates and terrestrial organic matter. Particles settled into deeper lake layers after two days and contributed to the uncoupling of C and N cycling as the lake responded to this extreme precipitation event. Following the event, there was an increase in bulk δ13C values of zooplankton (from -35 ‰ to -32 ‰). Throughout this study, δ13C values of DOM remained stable throughout the water column (-29 ‰ to -28 ‰), while large isotopic fluctuations in DOM δ2H (-140 ‰ to -115 ‰) and δ18O (+9 ‰ to +15 ‰) values suggested DOM relocation and turnover. Integrating isotope hydrology, ecosystem ecology, and organic geochemistry offers an element-specific, detailed approach to investigating the impact of extreme precipitation events on freshwater ecosystems and particularly aquatic food webs.

• Klíčová slova
• Basal aquatic resources, Deuterium, Organic matter cycling, Plankton food web,
• MeSH
• ekosystém MeSH
• izotopy uhlíku analýza   MeSH
• jezera * MeSH
• rozpuštěná organická hmota MeSH
• voda MeSH
• zooplankton * MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• izotopy uhlíku MeSH
• rozpuštěná organická hmota MeSH
• voda MeSH

• Klíčová slova
• DOGS *, EXPERIMENTAL LAB STUDY *, KIDNEY *, METABOLISM *, PHOSPHORUS *, PHOSPHORUS ISOTOPES *, RADIOAUTOGRAPHY *,
• MeSH
• autoradiografie * MeSH
• fosfor dietní * MeSH
• fosfor * MeSH
• izotopy fosforu * MeSH
• ledviny * MeSH
• metabolismus * MeSH
• psi MeSH
• výzkum * MeSH
• Check Tag
• psi MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• fosfor dietní * MeSH
• fosfor * MeSH
• izotopy fosforu * MeSH

• Klíčová slova
• CHROMIUM ISOTOPES *, ERYTHROCYTES *, PHOSPHORUS ISOTOPES *, RADIOISOTOPE SCANNING *, REVIEW *, TRITIUM *,
• MeSH
• erytrocyty * MeSH
• izotopy chromu * MeSH
• izotopy fosforu * MeSH
• lidé MeSH
• radioisotopová scintigrafie * MeSH
• radionuklidy * MeSH
• tritium * MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH
• Názvy látek
• izotopy chromu * MeSH
• izotopy fosforu * MeSH
• radionuklidy * MeSH
• tritium * MeSH

Epilithon contributes to phosphorus (P) cycling in lakes, but its P uptake traits have been rarely studied. We measured the chemical composition of epilithon and its inorganic P uptake kinetics using isotope 33P in three deep oligo- to mesotrophic post-mining lakes in April, July, and October 2019. Over the sampling period, epilithon biomass doubled, while the P content in biomass dropped to 60% of the April values, and the seasonal changes in P content expressed per epilithon area were only marginal and statistically not significant. High epilithic C:P molar ratios (677 on average) suggested strong P deficiency in all investigated lakes. Regarding the kinetic parameters of phosphorus uptake, maximum uptake velocity (V max , seasonal range 1.9-129 mg P g OM-1 h-1) decreased by an order of magnitude from April to October, while half-saturation constant (K S , seasonal range 3.9-135 mg P L-1) did not show any consistent temporal trend. Values of epilithic specific P uptake affinity (SPUA E , seasonal range 0.08-3.1 L g OM-1 h-1) decreased from spring to autumn and were two to four orders of magnitude lower than the corresponding values for seston (SPUA sest ), which showed an opposite trend. Considering our results, we suggest a possible mechanism underlying a stable coexistence of planktonic and epilithic microorganisms, with plankton prospering mostly in summer and autumn and epilithon in winter and spring season. Additionally, a phenomenon of reversible abiotic P adsorption on epilithon was observed.

• Klíčová slova
• epilithon, hydric recultivation, oligotrophic lakes, periphyton, phosphorus uptake, specific P affinity,
• Publikační typ
• časopisecké články MeSH