Current and paleo sources of organic material within fluvial features of the meandering Ruda River, Poland

Wójcicki, Krzysztof J.

doi:10.1016/j.catena.2022.106636

Cited by 3 publications

(5 citation statements)

References 36 publications

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“…The sam ples were me chan ically crushed and mixed with wa ter. A clas si fi ca tion based on the struc ture and mor phol ogy of OM (Wójcicki, 2022) was used with re spect to the Troels- Smith (1955) sys tem, the groups of plant re mains found in peats and limnic sed i ments (Tobolski, 2000), and with ref er ence to the clas si fi ca tion used by Fairbairn (2001). The di vi sion adopted per mit ted the re li able clas si fi cation of all or ganic re mains pres ent in the in di vid ual sed i ment sam ples.…”

Section: Methodsmentioning

confidence: 99%

“…The mean LOI value for 114 sam ples ana lysed (see Ta bles 3-12) was 12.8%. For com par i son, the av er age LOI con tent for 75 sam ples from the me an der ing Ruda val ley (organic-rich sed i ment suc ces sions were se lected for anal y sis, sim i larly to the O³awa val ley) was 24.2% (Wójcicki, 2022). This is chiefly a re sult of the more fre quent pres ence of peat in the fills of the aban doned chan nels (mean LOI -57.3%) and flood bas ins (mean LOI -27.6%) of the Ruda River.…”

Section: Fig 8 Mb Sitementioning

confidence: 99%

“…King and Mar tini, 1984;Tornqvist et al, 1993;Stouthamer, 2001). How ever, the amount of or ganic sed i ments de pos ited in this sub-en vi ron ment in the O³awa Val ley is gen er ally low compared to the neigh bour ing val leys of me an der ing rivers in the Upper Odra ba sin (Wójcicki, 2013;2022). The O³awa aban doned chan nels have a sin u os ity which var ies from me an der ing sections to al most straight sec tions.…”

Section: Origin Of Om In the Floodplain Faciesmentioning

confidence: 99%

“…Ba sic fea tures of the ana lysed fa cies of the de pos its high per cent age of AOM shows that a large pro por tion of the OM pro duced in the riverine eco sys tem of the River O³awa is sub ject to rapid de com po si tion. First, the re mains of the above-ground or gans of the plants, which con sist of thin-walled pa ren chyma cells, are de com posed (Wójcicki, 2022). The rapid deg ra da tion af fects, inter alia, the above-men tioned tree leaves, which are de pos ited sea son ally.…”

Section: Ta Ble 13mentioning

confidence: 99%

“…In ad di tion, the de vel op ment of soil for ma tion is respon si ble for post-sed i men tary pro cesses of en rich ment of al luvial ma te rial with epi der mis and rhizodermis. This is es pe cially ob served in fine-grained laminae, which are rich in nu tri ents and there fore pen e trated by root sys tems (Wójcicki, 2022). In the case of bars formed in sec ond ary chan nels, min eral sed i men tation can be re placed by or ganic ac cu mu la tion.…”

Section: Origin Of Om In the Channel Faciesmentioning

confidence: 99%

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Depositional system of an anastomosing river with low organic content: an example from the Oława Valley, SW Poland

WÓJCICKI

2023

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Large amounts of or ganic mat ter (OM) de pos ited on a co he sive floodplain are con sid ered a typ i cal fea ture of a low-en ergy anastomosing river in a hu mid cli mate. The O³awa River (Silesian Low land) is a multi-chan nel flu vial sys tem with lat er ally sta ble and low-gra di ent chan nels as well as inter-chan nel is lands cov ered with lush veg e ta tion. Stud ies in the O³awa Val ley were de signed to de ter mine the forms of oc cur rence and the con di tions of de po si tion of OM in re la tion to the main sed i mentary subenvironments. The re sults show a low pro por tion of OM in the sed i ments of the O³awa floodplain, usu ally dis play ing val ues typ i cal of min eral soils (up to sev eral per cent). In par tic u lar, the floodbasin and nat u ral levee de pos its have a low content of OM. The rap idly de cay ing OM there mainly ac cu mu lates in epipedons and is dom i nated by leaf and wood de bris. A some what higher con tent of OM was found in the chan nel al lu via, es pe cially in the rhyth mi cally strat i fied sed i ments of the upper part of the river bars. Plant de tri tus in the form of spe cies-rich wood, bark, re mains of leaves, fruits and seeds was de posited di rectly from the tree can opy or to gether with mud in the last phase of the flood. The re mains of di a toms, porifera and bryo zoans are typ i cal of sand ier strata. Or ganic sed i ments from fre quently flooded bars lo cally con tain more rhizodermis and epi der mis of amphiphytes. The great est po ten tial for ac cu mu la tion and long-term pres er va tion of OM is found in the abandoned chan nels. The aban doned chan nel-fills mainly con tain the re mains of autochthonous wood, rhizodermis and epi dermis. The re mains of mosses, Cladocera and Chironomidae are char ac ter is tic of this sed i men tary sub-en vi ron ment. In gen eral, how ever, the area oc cu pied by peatlands within the study area is dis pro por tion ately low (less than 1%) com pared to pub lished ex am ples of anastomosing-river, or ganic-rich floodplains. In the sec tions stud ied, the O³awa River thus rep resents a type of anastomosing sys tem in tem per ate, hu mid ar eas that has been over looked by clas si cal clas si fi ca tions and is char ac ter ised by a low or ganic sed i ment con tent.

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Section: Methodsmentioning

confidence: 99%

Section: Fig 8 Mb Sitementioning

confidence: 99%