The role of recharge zones, discharge zones, springs and tile drainage systems in peneplains of Central European highlands with regard to water quality generation processes

2004 ◽  
Vol 29 (11-12) ◽  
pp. 775-785 ◽  
Author(s):  
František Doležal ◽  
Tomáš Kvı́tek
2001 ◽  
pp. 38-48 ◽  
Author(s):  
L. B. Zaugolnova ◽  
I. I. Istomina ◽  
E. V. Tikhonova

Two computer data bases were formed: reference base «Prodromus» including the nomenclature forest syntaxa and experienced geobotanic releves «Forests of European Russia». Ecological, coenotic and floristic analysis of broadleaved-coniferous forests mostly corresponding to association Rhodobryo rosei – Piceetum abietis Korotkov 1986 was conducted with these bases. Releves (305) from South taiga and broadleaved-coniferous subzone were used. The analysis revealed complex syntaxonomy, bo­real-nemoral character and wide distribution ass. Rhodobryo-Piceetum from central European Russia. Ecolo­gical comparison of this association with some no­men­clature types of broadleaved-coniferous communities in East Europe was carried out. Preliminary prodromus for Euro­pean Russian mixed forests is suggested. Role of ecologi­cal, succession and regional factors was shown for dif­ferentiation of syntaxa.


2006 ◽  
Author(s):  
Gary R. Sands ◽  
Inhong Song ◽  
Lowell M. Busman ◽  
Bradley Hansen

2021 ◽  
Author(s):  
Melanie Münch ◽  
Rianne van Kaam ◽  
Karel As ◽  
Stefan Peiffer ◽  
Gerard ter Heerdt ◽  
...  

<p>The decline of surface water quality due to excess phosphorus (P) input is a global problem of increasing urgency. Finding sustainable measures to restore the surface water quality of eutrophic lakes with respect to P, other than by decreasing P inputs, remains a challenge. The addition of iron (Fe) salts has been shown to be effective in removing dissolved phosphate from the water column of eutrophic lakes. However, the resulting changes in biogeochemical processes in sediments as well as the long-term effects of Fe additions on P dynamics in both sediments and the water column are not well understood.</p><p>In this study, we assess the impact of past Fe additions on the sediment P biogeochemistry of Lake Terra Nova, a well-mixed shallow peat lake in the Netherlands. The Fe-treatment in 2010 efficiently reduced P release from the sediments to the surface waters for 6 years. Since then, the internal sediment P source in the lake has been increasing again with a growing trend over the years.</p><p>In 2020, we sampled sediments at three locations in Terra Nova, of which one received two times more Fe during treatment than the other two. Sediment cores from all sites were sectioned under oxygen-free conditions. Both the porewaters and sediments were analysed for their chemical composition, with sequential extractions providing insight into the sediment forms of P and Fe. Additional sediment cores were incubated under oxic and anoxic conditions and the respective fluxes of P and Fe across the sediment water interface were measured.</p><p>The results suggest that Fe and P dynamics in the lake sediments are strongly coupled. We also find that the P dynamics are sensitive to the amount of Fe supplied, even though enhanced burial of P in the sediment was not detected. The results of the sequential extraction procedure for P, which distinguishes P associated with humic acids and Fe oxides, as well as reduced flux of Fe(II) across the sediment water interface in the anoxic incubations, suggest a major role of organic matter in the interaction of Fe and P in these sediments.</p><p>Further research will include investigations of the role of organic matter and sulphur in determining the success of Fe-treatment in sequestering P in lake sediments. Based on these data in combination with reactive transport modelling we aim to constrain conditions for successful lake restoration through Fe addition.</p>


Author(s):  
FRANCISCO APELLÁNIZ

Abstract This article presents and discusses a source of unique importance for our knowledge of early modern global exchanges. Produced in 1503 by the Egyptian administration and found among the records of a Venetian company with global commercial interests, the document records hitherto unknown connections between the Arabian Peninsula, the Indian Subcontinent and Southeast Asia, followed by cargo figures. By sending the Memorandum to the head office in Venice, the Company's agents in Egypt were labouring to solve the most important concern of Venice's information network, that of coordinating Indian with Mediterranean trading seasons. By analysing the document's context, namely, a company involved in the export of central European metals to Asia, this article focuses on the capacity of its agents to gather information through collaboration, networking and ultimately, friendship with Muslim partners and informers. The story of the 1503 Memorandum and its transmission raises questions about the mixed networks underpinning global exchanges, the role of information and the drive of the late Mamluk sultanate into the world of the Indian Ocean.


2010 ◽  
Vol 3 (1) ◽  
pp. 6-14
Author(s):  
Béla Mester

The paper analyses a well‐known phenomenon, that of the 19th century Central European so‐called “national philosophies”. However, the philosophical heritages of the Central European countries have their roles in the national identities; historians of philosophy in these countries know; our philosophies have common institutional roots with our neighbours. The paper deadlines paradigmatic problems from the Hungarian and Slovakian philosophy: the Latin language in philosophy, the different role of Kantianism and Hegelianism in the national cultures, and the problems of canonisation. Vengrų ir slovakų nacionalinių filosofijų komparatyvistinė istoriografija: Vidurio Europos atvejis Santrauka Straipsnyje tyrinėjamas gerai žinomas fenomenas, XIX a. Vidurio Europoje vadinamas „nacionalinėmis filosofijomis“. Kad ir kaip būtų, filosofiniai Vidurio Europos valstybių palikimai turi įtakos nacionaliniams tapatumams, ir tai žino šių valstybių filosofijos istorikai. Mūsų ir mūsų kaimynų filosofijos turi bendrąsias paprotines šaknis. Straipsnyje brėžiama paradigminių vengrų ir slovakų filosofijos problemų perskyra pagal lotynų kalbą filosofijoje, skirtingą kantizmo ir hėgelizmo vaidmenį tautinėse kultūrose bei kanonizacijos problemas. Reikšminiai žodžiai: kanonizacija, Vidurio Europos filosofijos, hėgelizmas, vengrų filosofija, kantizmas, lotynų kalba filosofijoje, tautinis tapatumas, „nacionalinės filosofijos“, slovakų filosofija.


Geoderma ◽  
2007 ◽  
Vol 140 (3) ◽  
pp. 297-309 ◽  
Author(s):  
S.A. Saseendran ◽  
L. Ma ◽  
R. Malone ◽  
P. Heilman ◽  
L.R. Ahuja ◽  
...  

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