Počet záznamů: 1
Experimental biomass assessment of three species of freshwater aquatic plants by horizontal acoustics
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SYSNO ASEP 0308761 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Experimental biomass assessment of three species of freshwater aquatic plants by horizontal acoustics Překlad názvu Experimentální hodnocení biomasy tří druhů sladkovodních rostlin horizontální akustikou Tvůrce(i) Hohausová, Eva (BC-A)
Kubečka, Jan (BC-A) RID, ORCID
Frouzová, Jaroslava (BC-A) RID, ORCID
Husák, Štěpán (BU-J) RID
Balk, H. (NO)Zdroj.dok. Journal of Aquatic Plant Management - ISSN 0146-6623
Roč. 46, N (2008), s. 82-88Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova SIMRAD EK60 echosounder ; circular composite transducer ; Water persicaria ; Eurasian watermilfoil ; Sago pondweed ; multiple target ; frequency 120 kHz Vědní obor RIV BI - Akustika a kmity CEP GP206/04/P092 GA ČR - Grantová agentura ČR CEZ AV0Z60170517 - HBU-Z, BC-A (2005-2011) AV0Z60050516 - BU-J (2005-2011) Anotace In shallow water habitats, horizontal acoustics is a promising tool for assessment of plant biomass, a crucial feature for management of aquatic ecosystems. As interpretation of the acoustic characteristics of plants is missing, we made a first attempt to study the biomass of submerged plants by horizontal echosounding. The goal was to describe a basic acoustic feature, Sv (volume backscattering strength), and relate it to plant biomass. In total, 96 plants and patches of Polygonum amphibium; Myriophyllum spicatum and Potamogeton pectinatus were studied in an experiment and in a shallow lake. For all species, we found a positive linear relationship between Sv and dry biomass, describing 67-83% of the variability. The slope of the relationship differed statistically between species. The Sv of species overlapped irrespective of their biomass, therefore it was not suitable for species identification. The physiological/morphological states of the plants probably influence Sv. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2008
Počet záznamů: 1