LEAF LITTER COMPOSITION AND COMMUNITY STRUCTURE: TRANSLATING REGIONAL SPECIES CHANGES INTO LOCAL DYNAMICS

Autor:	Joseph M. Kiesecker, Michael J. Rubbo
Rok vydání:	2004
Předmět:	Maple Biomass (ecology) biology Ecology engineering.material Plant litter biology.organism_classification Temperate deciduous forest Deciduous Aceraceae engineering Litter Energy source Ecology Evolution Behavior and Systematics
Zdroj:	Ecology. 85:2519-2525
ISSN:	0012-9658
DOI:	10.1890/03-0653
Popis:	The temperate deciduous forest of the northeastern United States is believed to be undergoing a shift from domination by mixed oak (Quercus sp.) to red maple (Acer rubrum); a shift termed “The Red Maple Paradox.” This shift in the composition of the forest has the potential to affect ecosystems within the forest that use leaf litter as an energy source. To assess the impact of the red maple paradox on detrital food webs, we conducted a mesocosm experiment investigating the influence of red maple litter on the food web of temporary woodland ponds. Amphibian biomass and survival were significantly lower in experimental ponds that contained only maple litter. The negative effects of maple litter were most pronounced in larval wood frogs (Rana sylvatica). We hypothesize that this effect resulted from a temporary shift from a grazing-based food web in oak mesocosms to a microbial-based food web in maple mesocosms, as oak mesocosms initially had higher levels of phytoplankton biomass and lower levels of bacteri...
Databáze:	OpenAIRE
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