Search results for "charophyta"
showing 6 items of 6 documents
Reconstruction of the former charophyte community out of the fructifications identified in Albufera de València lagoon sediments
2010
Abstract Several decades ago, due to eutrophication, Albufera de Valencia lagoon lost the charophyte meadows that covered the bottom in the past but had never been studied in detail. An area close to the lagoon will be restored now to improve water quality and to recover submerged vegetation. To have information on the background of the charophytes from this area, four 80–87 cm long sediment cores were extracted from the lagoon. The subfossil charophyte fructifications (oospores and gyrogonites) were isolated and identified in two of the four cores. Moreover, sediment core fractions from the third and fourth cores were allowed to germinate under several conditions. The study of the lagoon s…
Chara hispida beds as a sink of nitrogen: Evidence from growth, nitrogen uptake and decomposition
2007
8 pages, and tables stadistics, and figures.
Putnu koloniju ietekme uz iegrimušo augu veģetāciju Engures ezerā
2020
Maģistra darbs “Putnu koloniju ietekme uz iegrimušo augu veģetāciju Engures ezerā” tika sākts izstrādāt 2018. gada augustā. Materiāli ievākti 2018. gada augustā un septembrī. Darba izstrāde veikta Latvijas Universitātes Bioloģijas fakultātes Botānikas un ekoloģijas katedrā. Darba mērķis ir noteikt putnu koloniju ietekmi uz iegrimušo veģetāciju Engures ezerā. Engures ezers ir mieturaļģu ezers, kura ekosistēmā pēdējos gados notiek izmaiņas, ko veicinājušas nesen izveidotās kormorānu Phalacrocarax carbo kolonijas. To ietekme uz ezeru līdz šim nav pētīta. Kļuvis vairāk arī gulbju Cygnus olor un lauču Fulica atra, kas barojas ar mieturaļģēm. Tiek paredzēts, ka eitrofikācijas rezultātā mieturaļģe…
New Species of Charophyta, Chara polyacantha A. Braun, in Lake Engure, Latvia
2012
Abstract The new charophyte species for Latvia, Chara polyacantha A. Braun, was described. This species was found in Lake Engure, the third largest lake of Latvia. In 2010, C.†polyacantha covered small, approximately 25 m2 patch, growing both in a monodominant stand and mixed with C. tomentosa in the central part of the lake.
22nd Meeting of the Group of European Charophytologists (GEC)
2019
The 22nd Meeting of the Group of European Charophytologists (GEC) was held from 17 to 21 September 2018 in Palermo. It was convened by the International Research Group on Charophytes (IRGC) and org...
Observaciones sobre algunos caracteres de valor taxonómico en el grupo de los carófitos
1990
The variability of the microstructurals characters and mineralogical composition of the oogonia of some charophytes extant and fossils is described. Two types of microstructures (W & V) are find. These are conservative into populations and are not able to change by the environmental factors. Moreover, these structures are quite constant in some of the phylogenetics groups studied. Consequently it is proposed its utilization in taxonomy. The apparition of original compounds in the Charophyta (vaterite. whewelite, aragonite, etc.) is important because it supports an old idea that considerates the Charophyta as an autonomous class between the Clorophyta and the Traqueophyta.<br><b…