Spatial and seasonal variation in the ecological significance of nutrient recycling by larval salamanders in Appalachian headwater streams

Autor:	Reuben R. Goforth, S. Conor Keitzer
Rok vydání:	2013
Předmět:	chemistry.chemical_classification Nutrient cycle Ecology biology STREAMS Aquatic Science Seasonality medicine.disease Nutrient chemistry biology.animal medicine Temperate climate Salamander Environmental science Ecosystem Essential nutrient Ecology Evolution Behavior and Systematics
Zdroj:	Freshwater Science. 32:1136-1147
ISSN:	2161-9565 2161-9549
DOI:	10.1899/13-002.1
Popis:	Salamanders are abundant consumers in many temperate streams and may be important recyclers of biologically essential nutrients, but their ecological role is poorly understood. The ecological significance of nutrient recycling by salamanders may vary spatially and seasonally because of their potentially patchy distribution in streams and the dynamic nature of stream hydrology and other nutrient fluxes. We examined the spatial and seasonal variation of salamander-driven nutrient recycling in 3 headwater streams in the southern Appalachian Mountains. We quantified the aggregate areal excretion rates of N (NH4+-N) for the larvae of the 2 most abundant salamander species in these steams before and after leaf fall to examine spatial and seasonal variation in the supply of nutrients from salamanders. We used short-term nutrient additions in each stream to examine temporal heterogeneity in the ecosystem demand for NH4+-N. Before leaf fall, salamanders were capable of meeting ∼10% of the ecosystem demand ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a8eb8c6073bc43ad6d91a032cc59c886 https://doi.org/10.1899/13-002.1 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.