"3"^^ . "1-4" . "DE - Spolkov\u00E1 republika N\u011Bmecko" . "RIV/60077344:_____/06:00049395" . "476102" . . "515;531" . "Food chain effects of sublethal ultraviolet radiation on subarctic Daphnia pulex - a field and laboratory study"@en . "Vliv ultrafialov\u00E9ho z\u00E1\u0159en\u00ED na potravn\u00ED \u0159et\u011Bzec subarktick\u00E9 Daphnia pulex - ter\u00E9nn\u00ED a laboratorn\u00ED studie"@cs . . . "Z(AV0Z6066911)" . "Arts, M. T." . "Food chain effects of sublethal ultraviolet radiation on subarctic Daphnia pulex - a field and laboratory study" . . "Zellmer, I. D." . . . "Vliv ultrafialov\u00E9ho z\u00E1\u0159en\u00ED na potravn\u00ED \u0159et\u011Bzec subarktick\u00E9 Daphnia pulex - ter\u00E9nn\u00ED a laboratorn\u00ED studie"@cs . . "In shallow subarctic ponds Daphnia and their algal food are often exposed to solar ultraviolet radiation (UVR). It was previously demonstrated that direct exposure of Daphnia to UVR may result in sublethal damage to Daphnia's intestinal system. This led to the hypothesis that, as consequences of such exposures, Daphnia may be experiencing a situation similar to starvation. We examined, in controlled experiments, the indirect effect of UVR-treated food algae on Daphnia pulex which, themselves, were also exposed to UVR. We specifically tested whether exposure of D. pulex to solar UVR affects food transport and enzymatic digestion. As expected, the UVR-exposed food and UVR-treated Daphnia combination produced the strongest effects on intestinal damage, and mortality. Some of these effects, as well as the grazer-related effects, were similar to those observed during starvation." . "RIV/60077344:_____/06:00049395!RIV07-AV0-60077344" . "0003-9136" . . "V m\u011Blk\u00FDch subarktick\u00FDch jezerech jsou perloo\u010Dky a jejich potrava (\u0159asy) \u010Dasto exponov\u00E1ny slune\u010Dn\u00EDm UV z\u00E1\u0159en\u00ED. Bylo zji\u0161t\u011Bno, \u017Ee p\u0159\u00EDm\u00E1 expozice UVR m\u016F\u017Ee zp\u016Fsobit sublet\u00E1ln\u00ED po\u0161kozen\u00ED tr\u00E1vic\u00EDho syst\u00E9mu perloo\u010Dek. To vede k hypot\u00E9ze, \u017Ee v d\u016Fsledku expozice je perloo\u010Dka vystavena podobn\u00E9 situaci jako je hladov\u011Bn\u00ED. V kontrolovan\u00FDch experimentech jsme sledovali nep\u0159\u00EDm\u00E9 vlivy UVR exponovan\u00E9 \u0159asov\u00E9 potravy na Daphnia pulex exponovan\u00E9 tak\u00E9 UVR. Testovali jsme ovlivn\u011Bn\u00ED p\u0159\u00EDjmu potravy, transport potravy a enzymatick\u00E9ho tr\u00E1ven\u00ED. Jak bylo p\u0159edpokl\u00E1d\u00E1no, kombinace UVR exponovan\u00E9 potravy a perloo\u010Dek vyvol\u00E1v\u00E1 nejt\u011B\u017E\u0161\u00ED po\u0161kozen\u00ED st\u0159eva a zv\u00FD\u0161en\u00ED mortality. N\u011Bkter\u00E9 z t\u011Bchto efekt\u016F byly podobn\u00E9 hladov\u011Bn\u00ED. Celkov\u00E1 aktivita tr\u00E1vic\u00EDch enzym\u016F (amyl\u00E1zy a celul\u00E1zy) byla pon\u011Bkud redukov\u00E1na u UVR exponovan\u00FDch jedinc\u016F D. pulex, ale funkce enzym\u016F nen\u00ED v\u00E1\u017En\u011B naru\u0161ena, jak je vidno ze vzestupn\u00E9ho trendu protein-specifick\u00E9 aktivity."@cs . "Archiv f\u00FCr Hydrobiologie" . "Food chain effects of sublethal ultraviolet radiation on subarctic Daphnia pulex - a field and laboratory study" . . . "17"^^ . . "[C089089A2413]" . "Food chain effects of sublethal ultraviolet radiation on subarctic Daphnia pulex - a field and laboratory study"@en . "In shallow subarctic ponds Daphnia and their algal food are often exposed to solar ultraviolet radiation (UVR). It was previously demonstrated that direct exposure of Daphnia to UVR may result in sublethal damage to Daphnia's intestinal system. This led to the hypothesis that, as consequences of such exposures, Daphnia may be experiencing a situation similar to starvation. We examined, in controlled experiments, the indirect effect of UVR-treated food algae on Daphnia pulex which, themselves, were also exposed to UVR. We specifically tested whether exposure of D. pulex to solar UVR affects food transport and enzymatic digestion. As expected, the UVR-exposed food and UVR-treated Daphnia combination produced the strongest effects on intestinal damage, and mortality. Some of these effects, as well as the grazer-related effects, were similar to those observed during starvation."@en . . "1"^^ . "UV radiation; Daphnia; enzymes"@en . . "167" . "\u0160ustr, Vladim\u00EDr" . . .