Results 261 to 270 of about 189,130 (302)

Seasonal shift in factors controlling net ecosystem production in a high Arctic terrestrial ecosystem

Journal of Plant Research, 2009
We examined factors controlling temporal changes in net ecosystem production (NEP) in a high Arctic polar semi-desert ecosystem in the snow-free season. We examined the relationships between NEP and biotic and abiotic factors in a dominant plant community (Salix polaris-moss) in the Norwegian high Arctic.
Masaki, Uchida, Ayaka, Kishimoto, Hiroyuki, Muraoka, Takayuki, Nakatsubo, Hiroshi, Kanda, Hiroshi, Koizumi   +5 more
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Nutrient Limitation Of Net Primary Production In Marine Ecosystems

Annual Review of Ecology and Systematics, 1988
The question of nutrient limitation of primary production in estuaries and other marine ecosystems has engendered a great deal of debate. Although nitrogen is often named as the primary limiting nutrient in seawater (3, 17-19, 50, 52, 55, 61, 76, 80), this is by no means universally accepted. Many workers have argued that phosphorus is limiting (58, 71)
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Production, Respiration and Net Ecosystem Metabolism in U.S. Estuaries

Environmental Monitoring and Assessment, 2003
Primary production, respiration, and net ecosystem metabolism (NEM) are useful indicators of ecosystem level trophic conditions within estuaries. In this study, dissolved oxygen data collected every half hour between January 1996 to December 1998 by the National Estuarine Research Reserve System Wide Monitoring Program were used to calculate primary ...
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Patterns of Net Primary Production in Chihuahuan Desert Ecosystems

2006
The Jornada Basin of southern New Mexico has long been an important location for the study of productivity in desert ecosystems. Researchers have studied the magnitude and sustainability of plant production since the founding of the USDA Jornada Experimental Range (JER) in 1912.
Laura F. Huenneke, William H. Schlesinger   +1 more
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Aboveground net primary production dynamics in a northern Chihuahuan Desert ecosystem

Oecologia, 2007
Aboveground net primary production (ANPP) dynamics are a key element in the understanding of ecosystem processes. For semiarid environments, the pulse-reserve framework links ANPP to variable and unpredictable precipitation events contingent on surficial hydrology, soil moisture dynamics, biodiversity structure, trophic dynamics, and landscape context.
Esteban H, Muldavin, Douglas I, Moore, Scott L, Collins, Karen R, Wetherill, David C, Lightfoot   +4 more
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Net Primary Productivity in Tropical Terrestral Ecosystems

1975
Ranging from lowland evergreen rain forest to alpine tundra, the variety of terrestrial ecosystems lying within tropical latitudes exceeds that of any other region on earth. Our knowledge of net primary productivity (NPP) rates in tropical ecosystems must be described as fragmentary.
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How does ecosystem water balance affect net primary productivity of woody ecosystems?

Functional Plant Biology, 2003
Australia is a very dry continent, with low levels of rainfall and high temperatures and evaporative demand for much of the continent for much of the year. Net primary productivity (NPP) of Australia is also low. These two observations are presumably related, and, at a catchment scale, correlations between ecosystem water balance and NPP surely exist ...
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Modeling landscape net ecosystem productivity (LandNEP) under alternative management regimes

Ecological Modelling, 2002
Forests have been considered as a major carbon sink within the global carbon budget. However, a fragmented forest landscape varies significantly in its composition and age structure, and the amount of carbon sequestered at this level remains generally unknown to the scientific community. More precisely, the temporal dynamics and spatial distribution of
Eugénie S Euskirchen, Jiquan Chen, Harbin Li, Eric J Gustafson, Thomas R Crow   +4 more
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Net Primary Production and Carbon Allocation Patterns of Boreal Forest Ecosystems

Ecological Applications, 2001
The three objectives of this paper were: to summarize net primary production (NPP) and carbon allocation patterns for boreal forests, to examine relationships between climatic and biological variables and NPP, and to examine carbon allocation coefficients for all boreal forests or types of boreal forests that can be used to estimate NPP from easily ...
S. T. Gower, O. Krankina, R. J. Olson, M. Apps, S. Linder, C. Wang   +5 more
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Nitrogen saturation and net ecosystem production - Reply

2008
Nitrogen (N) deposition alters ecosystem function in several ways, with important effects on N leaching and water quality, as well as on interspecific competition and biodiversity. These changes have been attributed to ecosystem N saturation, defined as the alleviation of N limitations on rates of biological function1.
MAGNANI, FEDERICO, Mencuccini M., Borghetti M., Berninger F., Delzon S., Grelle A., Hari P., Jarvis P. G., Kolari P., Kowalski A. S., Lankreijer H., Law B. E., Lindroth A., Loustau D., Manca G., Moncrieff J., Tedeschi V., Valentini R., Grace J.   +18 more
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