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Fenom\u00e9n potvrzuje, \u017ee lipensk\u00e1 n\u00e1dr\u017e je dlouhodob\u011b zat\u00ed\u017een\u00e1 nadbytkem \u017eivin ve vod\u011b (tzv. eutrofizac\u00ed), z\u00e1rove\u0148 je ovliv\u0148ov\u00e1na oteplov\u00e1n\u00edm klimatu a zm\u011bny v jej\u00edm ekosyst\u00e9mu tak prob\u00edhaj\u00ed i mimo tradi\u010dn\u00ed letn\u00ed sez\u00f3nu.<\/p>\n
Mikroskopick\u00e1 anal\u00fdza odebran\u00fdch vzork\u016f potvrdila, \u017ee se jednalo o b\u011b\u017enou sinici Woronichinia naegeliana, kter\u00e1 na Lipn\u011b p\u0159evl\u00e1d\u00e1 i b\u011bhem l\u00e9ta a podzimu. Z\u00e1kladn\u00ed p\u0159\u00ed\u010dinou rozvoje sinic je nadbytek \u017eivin ve vod\u011b, p\u0159edev\u0161\u00edm fosforu, kter\u00fd je z velk\u00e9 \u010d\u00e1sti d\u016fsledkem lidsk\u00e9 \u010dinnosti. Zat\u00edmco na v\u011bt\u0161in\u011b \u010desk\u00fdch p\u0159ehrad vodn\u00ed kv\u011bty sinic s p\u0159\u00edchodem podzimu postupn\u011b miz\u00ed a zpravidla se vytr\u00e1cej\u00ed koncem z\u00e1\u0159\u00ed, Lipno je v tomto ohledu v\u00fdjimkou. Dlouhodob\u00e1 data ukazuj\u00ed, \u017ee sinice zde \u010dasto p\u0159evl\u00e1daj\u00ed a\u017e do listopadu a v men\u0161\u00edm mno\u017estv\u00ed se mohou vyskytovat i b\u011bhem prosince a ledna.<\/p>\n
V z\u00e1v\u011bru roku 2025 se biomasa sinic dr\u017eela u hladiny nezvykle dlouho, od podzimu a\u017e do zimn\u00edho zamrznut\u00ed n\u00e1dr\u017ee, a to z\u0159ejm\u011b d\u00edky kombinaci klidn\u00e9ho po\u010das\u00ed, slab\u00e9ho v\u011btru a dlouh\u00e9 d\u00e9lce slune\u010dn\u00edho svitu. Pod tenkou a m\u00edsty velmi pr\u016fhlednou ledovou pokr\u00fdvkou tak nahromad\u011bn\u00e9 sinice vytv\u00e1\u0159ely n\u00e1padn\u00e9 zelen\u00e9 plochy viditeln\u00e9 ze b\u0159ehu i z leteck\u00fdch sn\u00edmk\u016f. Nejv\u00edce patrn\u00fd byl zelen\u00fd led v obdob\u00ed p\u0159echodn\u00e9ho oteplen\u00ed okolo \u0160t\u011bdr\u00e9ho dne, po op\u011btovn\u00e9m zamrznut\u00ed byla zvl\u00e1\u0161\u0165 v\u00fdrazn\u00fdm rysem tzv. \u201esinicov\u00e1 oka\u201c, tedy m\u00edsta s \u010dir\u00fdm ledem nad tmav\u00fdmi shluky sinic, kter\u00e1 vznikla rozd\u00edln\u00fdm pohlcov\u00e1n\u00edm slune\u010dn\u00edho z\u00e1\u0159en\u00ed. Fenom\u00e9n p\u0159etrval a\u017e do konce roku a pravd\u011bpodobn\u011b skon\u010dil a\u017e po vydatn\u00e9m sn\u011b\u017een\u00ed, kter\u00e9 omezilo p\u0159\u00edstup sv\u011btla pod led.<\/p>\n
\u201eZelen\u00fd led na Lipn\u011b zapad\u00e1 do dlouhodob\u00fdch zm\u011bn, kter\u00e9 zde pozorujeme v souvislosti s eutrofizac\u00ed i prob\u00edhaj\u00edc\u00ed zm\u011bnou klimatu. Nazna\u010duje, \u017ee podobn\u00fdch p\u0159ekvapen\u00ed m\u016f\u017eeme b\u00fdt v budoucnu sv\u011bdky st\u00e1le \u010dast\u011bji,\u201c<\/em> \u0159\u00edk\u00e1 hydrobiolog Petr Znachor z Biologick\u00e9ho centra AV \u010cR. Podledov\u00fd v\u00fdskyt sinic je ve sv\u011bt\u011b vz\u00e1cn\u00fd a dosud byl zdokumentov\u00e1n jen v mal\u00e9m po\u010dtu p\u0159\u00edpad\u016f. Nyn\u011bj\u0161\u00ed pozorov\u00e1n\u00ed na Lipn\u011b tak pat\u0159\u00ed mezi nejl\u00e9pe popsan\u00e9 z\u00e1znamy a z\u00e1rove\u0148 ukazuje, \u017ee i b\u011b\u017en\u00e9 druhy sinic mohou za ur\u010dit\u00fdch podm\u00ednek vykazovat netypick\u00e9 chov\u00e1n\u00ed.<\/p>\n <\/p>\n Text a foto: (tz-av\u010dr)<\/strong><\/p>\n <\/p>\n <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" Neobvykl\u00fd <\/p>\n","protected":false},"author":2,"featured_media":365762,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"gallery","meta":{"footnotes":""},"categories":[174,69],"tags":[],"jetpack_featured_media_url":"https:\/\/zakrasnejsivimperk.cz\/wp-content\/uploads\/2026\/01\/07\/zeleny-led-na-lipne-2.jpg","_links":{"self":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts\/365760"}],"collection":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=365760"}],"version-history":[{"count":4,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts\/365760\/revisions"}],"predecessor-version":[{"id":365767,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts\/365760\/revisions\/365767"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/media\/365762"}],"wp:attachment":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=365760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=365760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=365760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/zakrasnejsivimperk.cz\/wp-content\/uploads\/2026\/01\/07\/zeleny-led-na-lipne-3.jpg\")
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