Počet záznamů: 1
Biological activities as patchiness driving forces in wetlands of northern Belize
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SYSNO ASEP 0335034 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Biological activities as patchiness driving forces in wetlands of northern Belize Překlad názvu Biologická aktivita jako hnací síla ostrůvkovitosti vegetace v mokřadech severního Belize Tvůrce(i) Macek, Petr (BU-J)
Rejmánková, E. (US)
Fuchs, R. (CZ)Celkový počet autorů 3 Zdroj.dok. Oikos. - : Wiley - ISSN 0030-1299
Roč. 118, č. 11 (2009), s. 1687-1694Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. DK - Dánsko Klíč. slova Aramus guarauna ; oligotrophic tropical wetlands ; nutrient cycling Vědní obor RIV EF - Botanika CEZ AV0Z60050516 - BU-J (2005-2011) UT WOS 000271004300010 DOI 10.1111/j.1600-0706.2009.17650.x Anotace Belizean oligotrophic wetlands display noticeable vegetation heterogeneity, patchiness. Patches had denser and taller vegetation, higher amount of empty snail shells and elevated soil P. Plants in patches had higher tissue N & P content and were enriched in 15N; patch soils were depleted in 13C. We observed Aramus guarauna, a wading bird feeding exclusively on snails. An adult bird captured 18 snails daily, of these 80% were handled in patches; birds often repeatedly used the same patch. Experimental patch creation (chicken manure) had the effect noticeable even 40 months after. We present a simple mechanistic explanation for nutrient redistribution in wetlands and their eventual accumulation in patches. Both nutrient and isotopic differences result from animal input into patches. Foraging activity of A. guarauna is most likely responsible for patch formation. A positive feedback (repeated use of a suitable patch) is apparently the mechanism sustaining patches in these marshes. Pracoviště Botanický ústav Kontakt Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Rok sběru 2010
Počet záznamů: 1