TY  - JOUR
AU  - Palmer, Stephanie CJ
AU  - Pelevin, Vadim V
AU  - Goncharenko, Igor
AU  - Kovács, Attila
AU  - Zlinszky, András
AU  - Présing, Mátyás
AU  - Horváth, Hajnalka
AU  - Nicolás-Perea, Virginia
AU  - Balzter, Heiko
AU  - Tóth, Viktor R.
TI  - Ultraviolet Fluorescence LiDAR (UFL) as a Measurement Tool for Water Quality Parameters in Turbid Lake Conditions
JF  - REMOTE SENSING
J2  - REMOTE SENS-BASEL
VL  - 5
PY  - 2013
IS  - 9
SP  - 4405
EP  - 4422
PG  - 18
SN  - 2072-4292
DO  - 10.3390/rs5094405
UR  - https://m2.mtmt.hu/api/publication/2399756
ID  - 2399756
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Présing, Mátyás
AU  - Preston, T
AU  - Takátsy, Anikó
AU  - Sprőber, P
AU  - Kovács, Attila
AU  - Vörös, Lajos
AU  - Kenesi, Gy
AU  - Kóbor, I
TI  - Phytoplankton nitrogen demand and the significance of internal and external nitrogen sources in a large shallow lake (Lake Balaton, Hungary)
JF  - HYDROBIOLOGIA
J2  - HYDROBIOLOGIA
VL  - 599
PY  - 2008
IS  - 1
SP  - 87
EP  - 95
PG  - 9
SN  - 0018-8158
DO  - 10.1007/s10750-007-9191-1
UR  - https://m2.mtmt.hu/api/publication/1108749
ID  - 1108749
AB  - Abstract Since the middle of 1990s the trend of Lake Balaton towards an increasingly trophic status has been reversed, but N2-fixing cyanobacteria are occasionally dominant, endangering water quality in summer. The sources of nitrogen and its uptake by growing phytoplankton were therefore studied. Experiments were carried out on samples collected from the middle of the Eastern (Siófok) and Western (Keszthely) basins between February and October 2001. Ammonium, urea and nitrate uptake and ammonium regeneration were measured in the upper 5-cm layer of sediment using the 15N-technique. Ammonium was determined by an improved microdiffusion assay. N2 fixation rates were measured by the acetylene-reduction method. Ammonium regeneration rates in the sediment were similar in the two basins. They were relatively low in winter (0.13 and 0.16 μg N cm−3 day−1 in the Eastern and Western basin, respectively), increased slowly in the spring (0.38 and 0.45 μg N cm−3 day−1) and peaked in late summer (0.82 and 1.29 μg N cm−3 day−1, respectively). Ammonium uptake was predominant in spring in the Eastern basin and in summer in the Western basin, coincident with the cyanobacterial bloom. The amount of N2 fixed was less than one third of the internal load during summer when external N loading was insignificant. Potentially, the phytoplankton N demand could be supported entirely by the internal N load via ammonium regeneration in the water column and sediment. However, the quantity of N from ammonium regeneration in the upper layer of sediment combined with that from the water column would limit the standing phytoplankton crop in spring in both basins and in late summer in the Western basin, especially when the algal biomass increases suddenly. 
Keywords Ammonium regeneration - Microdiffusion - Nitrogen uptake - 15N-technique
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Tyler, AN
AU  - Sváb, E
AU  - Preston, T
AU  - Présing, Mátyás
AU  - Kovács, Attila
TI  - Remote sensing of the water quality of shallow lakes: A mixture modelling approach to quantifying phytoplankton in water characterized by high-suspended sediment
JF  - INTERNATIONAL JOURNAL OF REMOTE SENSING
J2  - INT J REMOTE SENS
VL  - 27
PY  - 2006
IS  - 8
SP  - 1521
EP  - 1537
PG  - 17
SN  - 0143-1161
DO  - 10.1080/01431160500419311
UR  - https://m2.mtmt.hu/api/publication/1106248
ID  - 1106248
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Sváb, E
AU  - Tyler, AN
AU  - Preston, T
AU  - Présing, Mátyás
AU  - V.-Balogh, Katalin
TI  - Characterizing the spectral reflectance of algae in lake waters with high suspended sediment concentrations
JF  - INTERNATIONAL JOURNAL OF REMOTE SENSING
J2  - INT J REMOTE SENS
VL  - 26
PY  - 2005
IS  - 5
SP  - 919
EP  - 928
PG  - 10
SN  - 0143-1161
DO  - 10.1080/0143116042000274087
UR  - https://m2.mtmt.hu/api/publication/1106228
ID  - 1106228
LA  - English
DB  - MTMT
ER  - 

TY  - CHAP
AU  - Herodek, Sándor
ED  - Somlyódy, László
ED  - van Straten, G
TI  - Phytoplankton changes during eutrophication and P and N metabolism
T2  - Modeling and Managing Shallow Lake Eutrophication
PB  - Springer Netherlands
CY  - New York, New York
CY  - Berlin
CY  - Tokyo
CY  - Heidelberg
SN  - 3540162275
PY  - 1986
SP  - 183
EP  - 203
PG  - 21
DO  - 10.1007/978-3-642-82707-5_8
UR  - https://m2.mtmt.hu/api/publication/2033072
ID  - 2033072
LA  - English
DB  - MTMT
ER  -