Results 241 to 250 of about 513,528 (298)

Human appropriation of net primary production (HANPP)

2023
Humans use land to produce biomass for food, fibre, energy and other raw materials gained through agriculture and forestry. Moreover, land hosts settlements, infrastructures and waste deposits. The ‘human appropriation of net primary production’ (HANPP) is a system-level metric of land-use intensity.
Haberl, Helmut   +2 more
openaire   +2 more sources

Human Appropriation of Net Primary Production

Science, 2002
The fraction of total plant growth or net primary production (NPP) appropriated by humans, often referred to as human appropriation of net primary production (HANPP), is among the most widely used measures to assess the “human domination of Earth's ecosystems” ([1][1]). S. Rojstaczer et al. (“
Helmut Haberl   +3 more
openaire   +1 more source

Oceanic Net Primary Production

2013
Production of organic matter in the ocean is a fundamental process for biogeochemical cycling of elements (carbon, nitrogen, etc.) as well as for providing the foundation of nearly all marine food webs. Satellite remote sensing provides the only means of estimating this rate at basin and global scales. A variety of satellite-based models for estimation
Toby K. Westberry, Michael J. Behrenfeld
openaire   +1 more source

Interannual Variability in Net Primary Production and Precipitation

Science, 2001
Knapp and Smith (1) suggested that interannual variability in aboveground net primary production (ANPP) is not related to fluctuations in precipitation, based on analysis of data from 11 Long-Term Ecological Research sites across North America.
J, Fang   +4 more
openaire   +2 more sources

Global climate change and terrestrial net primary production

Nature, 1993
A process-based model was used to estimate global patterns of net primary production and soil nitrogen cycling for contemporary climate conditions and current atmospheric CO2 concentration. Over half of the global annual net primary production was estimated to occur in the tropics, with most of the production attributable to tropical evergreen forest ...
Jerry M. Melillo   +5 more
openaire   +1 more source

Net Primary Productivity in Coral Reef Sponges

Science, 1983
Nine of the ten most common sponge species on the fore-reef slope of Davies Reef(Great Barrier Reef) contain symbiotic cyanobacteria. Six of the ten are net primary producers, with three times more oxygen produced by photosynthesis than is consumed during respiration.
openaire   +2 more sources

Soils as biotic constructs favouring net primary productivity

Geoderma, 1993
Abstract Many, if not most, physical and chemical properties of soils required for plant growth are affected strongly by biotic processes. Feedback processes involving primary producers and decomposers may be involved in the development of properties that favour net primary productivity in terrestrial ecosystems.
openaire   +2 more sources

Methods of Estimating Aboveground Net Primary Productivity

2000
Estimating net primary productivity (NPP) has been a central goal of basic and applied ecologists. Very important questions rely on good estimates of NPP: the global carbon balance, the location of the missing carbon sink, and predictions of global climate change (see Chapter 3). Primary productivity represents the major input of carbon and energy into
Osvaldo E. Sala, Amy T. Austin
openaire   +1 more source

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