{"id":13843,"date":"2026-03-04T13:10:08","date_gmt":"2026-03-04T13:10:08","guid":{"rendered":"https:\/\/www.europesays.com\/cz\/13843\/"},"modified":"2026-03-04T13:10:08","modified_gmt":"2026-03-04T13:10:08","slug":"zeleny-led-na-lipne-voda-mela-v-prosinci-stejnou-koncentraci-sinic-jako-kvetouci-rybniky-v-lete","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/cz\/13843\/","title":{"rendered":"Zelen\u00fd led na Lipn\u011b. Voda m\u011bla v\u00a0prosinci stejnou koncentraci sinic jako kvetouc\u00ed rybn\u00edky v\u00a0l\u00e9t\u011b"},"content":{"rendered":"

\u201eV\u00fdpo\u010dty koncentrace chlorofylu ze sn\u00edmk\u016f dru\u017eice Sentinel-2\u00a0evropsk\u00e9ho programu Copernicus nazna\u010duj\u00ed, \u017ee zimn\u00ed hodnoty dosahovaly \u00farovn\u011b b\u011b\u017en\u00e9 pro siln\u011b zat\u00ed\u017een\u00e9 produk\u010dn\u00ed rybn\u00edky v\u00a0l\u00e9t\u011b,\u201c uvedla mluv\u010d\u00ed Biologick\u00e9ho centra Akademie v\u011bd \u010cR Daniela Proch\u00e1zkov\u00e1. V\u00fdzkumn\u00edci d\u00e1le zd\u016fraznili, \u017ee zelen\u00fd led je naprosto mimo\u0159\u00e1dn\u00fdm jevem.<\/p>\n

Dne 4.\u00a0\u00fanora 2026\u00a0zve\u0159ejnil<\/a> evropsk\u00fd program Copernicus sn\u00edmek z\u00a0dru\u017eic Sentinel-2, po\u0159\u00edzen\u00fd 18.\u00a0prosince 2025, kter\u00fd zachycuje v\u00fdrazn\u00e9 zelen\u00e9 zbarven\u00ed v\u011bt\u0161iny n\u00e1dr\u017ee s\u00a0odkazem na anglickou verzi lednov\u00e9 tiskov\u00e9 zpr\u00e1vy Biologick\u00e9ho centra AV \u010cR.<\/p>\n

Hydrobiologov\u00e9 tento sn\u00edmek d\u00e1le analyzovali pomoc\u00ed n\u00e1stroje RWQForecast, kter\u00fd byl vyvinut \u010desk\u00fdmi v\u011bdci pro hodnocen\u00ed kvality vody na z\u00e1klad\u011b dru\u017eicov\u00fdch dat Sentinel-2.<\/p>\n

<\/a><\/p>\n

Vypo\u010dten\u00e9 hodnoty koncentrace chlorofylu byly mimo\u0159\u00e1dn\u00e9. Pr\u016fm\u011brn\u00e1 koncentrace pro celou n\u00e1dr\u017e dosahovala t\u00e9m\u011b\u0159 200\u00a0mikrogram\u016f na litr, p\u0159i\u010dem\u017e v\u00a0m\u00edstech nahromad\u011bn\u00ed vodn\u00edho kv\u011btu byly odhadnuty hodnoty bl\u00ed\u017e\u00edc\u00ed se 600\u00a0mikrogram\u016fm na litr.<\/p>\n

Naru\u0161en\u00ed ekologick\u00e9 rovnov\u00e1hy lipensk\u00e9 n\u00e1dr\u017ee<\/p>\n

\u201eP\u0159esto\u017ee si uv\u011bdomujeme, \u017ee se jedn\u00e1 o\u00a0extr\u00e9mn\u00ed situaci, tyto hodnoty odpov\u00eddaj\u00ed koncentrac\u00edm b\u011b\u017en\u011b nam\u011b\u0159en\u00fdm v\u00a0siln\u011b zat\u00ed\u017een\u00fdch produk\u010dn\u00edch rybn\u00edc\u00edch b\u011bhem letn\u00ed sezony,\u201c potvrdil hydrobiolog Petr Znachor z\u00a0Biologick\u00e9ho centra AV \u010cR. <\/p>\n

Podle n\u011bj v\u00fdsledky nazna\u010duj\u00ed, \u017ee ekologick\u00e1 rovnov\u00e1ha lipensk\u00e9 n\u00e1dr\u017ee je v\u00fdrazn\u011b naru\u0161ena a\u00a0syst\u00e9m se pravd\u011bpodobn\u011b posouv\u00e1 sm\u011brem k\u00a0\u010dast\u011bj\u0161\u00edmu a\u00a0intenzivn\u011bj\u0161\u00edmu v\u00fdskytu sinicov\u00fdch vodn\u00edch kv\u011bt\u016f.<\/p>\n

<\/a><\/p>\n

\u201eTento trend je t\u0159eba vn\u00edmat v\u00a0\u0161ir\u0161\u00edm kontextu dlouhodob\u00e9ho v\u00fdvoje eutrofizace a\u00a0prob\u00edhaj\u00edc\u00edch klimatick\u00fdch zm\u011bn, kter\u00e9 mohou m\u011bnit sezonn\u00ed dynamiku a\u00a0stabilitu vodn\u00edch ekosyst\u00e9m\u016f,\u201c m\u00edn\u00ed Znachor.<\/p>\n

Foto: Petr Znachor<\/p>\n

Na Lipn\u011b byl v\u00a0prosinci zelen\u00fd led.<\/p>\n

B\u011bhem \u00fanora do\u0161lo vlivem teplej\u0161\u00edho po\u010das\u00ed k\u00a0t\u00e1n\u00ed sn\u011bhu v\u00a0povod\u00ed n\u00e1dr\u017ee, co\u017e zp\u016fsobilo postupn\u00fd vzestup hladiny na k\u00f3tu 723\u00a0m n. m. (stav k\u00a03.\u00a0b\u0159eznu 2026). Oproti podzimn\u00edmu obdob\u00ed tak hladina stoupla p\u0159ibli\u017en\u011b o\u00a0p\u016fl metru. I\u00a0na za\u010d\u00e1tku b\u0159ezna je v\u011bt\u0161ina n\u00e1dr\u017ee st\u00e1le pokryta ledem, nicm\u00e9n\u011b pod\u00e9l b\u0159eh\u016f vznikl n\u011bkolikametrov\u00fd p\u00e1s bez ledu, p\u0159\u00edpadn\u011b se tam b\u011bhem chladn\u00fdch noc\u00ed vytv\u00e1\u0159\u00ed pouze tenk\u00e1 ledov\u00e1 vrstva.<\/p>\n

Pr\u00e1v\u011b v\u00a0t\u00e9to nov\u00e9 vrstv\u011b se m\u00edsty objevuj\u00ed n\u011bkolikacentimetrov\u00e9 shluky sinic. Podle jejich intenzivn\u00edho zelen\u00e9ho zbarven\u00ed je z\u0159ejm\u00e9, \u017ee p\u0159e\u017eily n\u011bkolikam\u011bs\u00ed\u010dn\u00ed obdob\u00ed pod ledem v\u00a0dobr\u00e9 kondici.<\/p>\n

Ve st\u0159edn\u00ed \u010d\u00e1sti n\u00e1dr\u017ee v\u0161ak p\u0159i pohledu z\u00a0v\u00fd\u0161ky nejsou pod dosud silnou ledovou pokr\u00fdvkou v\u00fdrazn\u00e9 akumulace vodn\u00edho kv\u011btu, kter\u00e9 byly z\u0159eteln\u00e9 v\u00a0prosinci. \u201eNab\u00edzej\u00ed se dv\u011b vysv\u011btlen\u00ed: bu\u010f je led natolik nepr\u016fhledn\u00fd, \u017ee pod n\u00edm sinice nejdou vizu\u00e1ln\u011b rozpoznat, nebo do\u0161lo k\u00a0poklesu jejich koncentrace ve vod\u011b, p\u0159\u00edpadn\u011b jde o\u00a0kombinaci obou faktor\u016f,\u201c doplnil Znachor, kter\u00fd situaci na Lipn\u011b nad\u00e1le sleduje.<\/p>\n

Otev\u0159enou ot\u00e1zkou z\u016fst\u00e1v\u00e1, jak zimn\u00ed p\u0159\u00edtomnost vysok\u00e9 biomasy sinic ovlivn\u00ed sezonn\u00ed v\u00fdvoj mikroskopick\u00fdch \u0159as a\u00a0sinic b\u011bhem roku 2026.<\/p>\n

<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"\u201eV\u00fdpo\u010dty koncentrace chlorofylu ze sn\u00edmk\u016f dru\u017eice Sentinel-2\u00a0evropsk\u00e9ho programu Copernicus nazna\u010duj\u00ed, \u017ee zimn\u00ed hodnoty dosahovaly \u00farovn\u011b b\u011b\u017en\u00e9 pro siln\u011b…\n","protected":false},"author":2,"featured_media":13844,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[7783,43,1112,42,41,40,7782,7786,7785,7784,6068],"class_list":{"0":"post-13843","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-cesko","8":"tag-biologicke-centrum-av-cr","9":"tag-ceska-republika","10":"tag-ceske-budejovice","11":"tag-cesko","12":"tag-czech-republic","13":"tag-czechia","14":"tag-lipno","15":"tag-program-copernicus","16":"tag-sentinel-druzice","17":"tag-sinice","18":"tag-vedci"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@cz\/116171074870965158","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/13843","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/comments?post=13843"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/13843\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media\/13844"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media?parent=13843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/categories?post=13843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/tags?post=13843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}