Tijekom prolje\u0107a i jeseni 2024. godine provedeno je opse\u017eno istra\u017eivanje flore i vegetacije makroalgi na sedam slapova: Bilu\u0161i\u0107a buk, Brljan, Manojlovac, Ro\u0161njak, Miljacka, Ro\u0161ki slap i Skradinski buk. Terenski rad uklju\u010divao je in situ<\/em> dokumentaciju i uzorkovanje makroskopskih zajednica algi i cijanobakterija, uz laboratorijsku determinaciju taksona. Uzorci su determinirani do razine vrste ili najni\u017ee mogu\u0107e taksonomske razine. Na svakoj lokaciji bilje\u017eeni su okoli\u0161ni parametri poput protoka vode, dostupnosti svjetla, tipa supstrata i intenziteta talo\u017eenja karbonata. Ukupno je determinirana 81 svojta makroalgi. U flori makroalgi dominirale su cijanobakterije s 37 svojti (45 % ukupno dokumentiranih taksona), zatim Chlorophyta s 28 svojti (35 %), Rhodophyta s 8 svojti (10 %), Xanthophyta s 5 svojti (7 %), Chrysophyta s 2 svojte (2 %) te jedna Phaeophyta (Heribaudiella fluviatilis<\/em>) (1 %).<\/p>\n Makroalgne zajednice razvrstane su u 14 razli\u010ditih tipova, uklju\u010duju\u0107i dominantne filamentozne alge (Cladophora glomerata<\/em>, Chara<\/em> spp., Vaucheria<\/em> spp., zajednice Zygnemataceae), sedrotvorne kalcificiraju\u0107e alge (npr. Gongrosira<\/em> spp., Oocardium incrustatum<\/em>), koraste cijanobakterijske prevlake (npr. Nostoc<\/em> spp., Oscillatoriales), filamentozne crvene alge (npr. Batrachospermum<\/em> spp., Lemanea<\/em> spp., Bangia atropurpurea<\/em>), asocijaciju korastih crvenih i sme\u0111ih slatkovodnih algi (Hildenbrandia<\/em>\u2013Heribaudiella<\/em>), hladnovodne alge (Hydrurus foetidus<\/em>), kopnene alge (Trentepohlia aurea<\/em>) te svojte tolerantne na bo\u010datu vodu (Polysiphonia subtilissima<\/em>).<\/p>\n Makroskopska flora algi i cijanobakterijske prevlake bile su sna\u017eno pod utjecajem hidrologije i mikrostani\u0161nih uvjeta, uz izra\u017eenu zonaciju povezanu s dinamikom protoka vode i dostupno\u0161\u0107u svjetla. Povijesna usporedba potvrdila je prisutnost 15 vrsta koje je zabilje\u017eio Hansgirg 1890. godine te 24 vrste dokumentirane od strane Golubi\u0107a 1957. godine, \u0161to ukazuje na dugoro\u010dnu stabilnost klju\u010dnih makroalgnih zajednica i pove\u0107anje zabilje\u017eene raznolikosti. Rezultati nagla\u0161avaju va\u017enost makroalgi i cijanobakterijskih prevlaka u biolo\u0161kim i geomorfolo\u0161kim procesima stvaranja sedre.<\/p>\n <\/p>\n [\/hr]<\/p>\n [en] During spring and autumn 2024, a comprehensive survey of the flora and macroalgae vegetation was conducted at seven waterfalls: Bilu\u0161i\u0107a buk, Brljan, Manojlovac, Ro\u0161njak, Miljacka, Ro\u0161ki slap and Skradinski buk. Field work included in situ<\/em> documentation and sampling of macroscopic algae and cyanobacteria communities, with taxon determination conducted in the laboratory. Samples were determined to the species level, or the lowest possible taxonomic level. At each location, the environmental parameters were also recorded, including water flow, light availability, type of substrate, and intensity of carbonate deposition. A total of 81 macroalgae taxa were determined, dominated by the cyanobacteria with 37 taxa (45% of all recorded taxa), then Chlorophyta with 28 taxa (35%), Rhodophyta with 8 taxa (10%), Xanthophyta with 5 taxa (7%), Chrysophyta with 2 taxa (2%) and one taxon of Phaeophyta (Heribaudiella fluviatilis<\/em>) (1%).<\/p>\n The macroalgae community is divided into 14 different types, including the dominant filamentous algae (Cladophora glomerata<\/em>, Chara<\/em> spp., Vaucheria<\/em> spp., Zygnemataceae communities), tufa-building calcifying algae (such as Gongrosira<\/em> spp., Oocardium incrustatum<\/em>), cyanobacteria crusts (such as Nostoc<\/em> spp., Oscillatoriales), filamentous red algae (e.g., Batrachospermum<\/em> spp., Lemanea<\/em> spp., Bangia atropurpurea<\/em>), associations of crusty red and brown freshwater algae (Hildenbrandia\u2013Heribaudiella<\/em>), cold water algae (Hydrurus foetidus<\/em>), terrestrial algae (Trentepohlia aurea<\/em>) and taxa tolerant of higher salinity and brackish water (Polysiphonia subtilissima<\/em>).<\/p>\n Macroscopic flora of algae and cyanobacteria were strongly affected by the hydrology and microhabitat conditions, with pronounced zonation associated with water flow dynamics and light availability. A historical comparison confirmed the presence of 15 species recorded by Hansgirg in 1890, and 24 species recorded by Golubi\u0107 in 1957, indicating the long-term stability of key macroalgae communities, and increased diversity. The results highlight the importance of macroalgae and cyanobacteria in biological and geomorphological processes involved in tufa-building.<\/p>\n <\/p> Sedreni slapovi rijeke Krke dinami\u010dni su slatkovodni ekosustavi u kojima su procesi stvaranja sedre usko povezani sa specifi\u010dnim makroskopskim konglomeratima algi<\/p>\n","protected":false},"author":2,"featured_media":11679,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44],"tags":[],"class_list":["post-11677","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"_links":{"self":[{"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/posts\/11677","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/comments?post=11677"}],"version-history":[{"count":4,"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/posts\/11677\/revisions"}],"predecessor-version":[{"id":14129,"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/posts\/11677\/revisions\/14129"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/media\/11679"}],"wp:attachment":[{"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/media?parent=11677"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/categories?post=11677"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/npkrka.hr\/hr\/wp-json\/wp\/v2\/tags?post=11677"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![](\"https:\/\/npkrka.hr\/wp-content\/uploads\/Batrachospermum-8.jpeg\")
![](\"https:\/\/npkrka.hr\/wp-content\/uploads\/Chara-1.jpeg\")
![](\"https:\/\/npkrka.hr\/wp-content\/uploads\/Oscillatoriales-5.jpeg\")
![](\"https:\/\/npkrka.hr\/wp-content\/uploads\/Nostoc-1.jpeg\")
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<\/div>
\nMacroalgae of the Krka River waterfalls<\/strong>
\nThe tufa waterfalls of the Krka River are a dynamic freshwater ecosystem, in which the tufa-building process is closely tied to specific macroscopic conglomerates of algae<\/strong><\/p>\n<\/div>
\n[\/en]<\/p>\n","protected":false},"excerpt":{"rendered":"