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Changes in ecosystem processes induced by land use: Human appropriation of aboveground NPP and its influence on standing crop in Austria
Author(s) -
Haberl Helmut,
Erb KarlHeinz,
Krausmann Fridolin,
Loibl Wolfgang,
Schulz Niels,
Weisz Helga
Publication year - 2001
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/2000gb001280
Subject(s) - environmental science , standing crop , primary production , vegetation (pathology) , biomass (ecology) , ecosystem , land cover , land use , energy flow , agroforestry , ecology , medicine , statistics , mathematics , pathology , energy (signal processing) , biology
Human land use influences important properties of terrestrial ecosystems, such as energy flow, standing crop, and biomass turnover. Human interference with ecological energy flows may be studied by calculating the “human appropriation of NPP” (HANPP), defined as the difference between the net primary production (NPP) of potential vegetation and the actual NPP remaining in ecosystems after harvest. Comparing the standing crops of the potential vegetation and actually prevailing vegetation, we demonstrate the human impact on the amount of carbon stored in living vegetation. We discuss these concepts using empirical results for aboveground vegetation in Austria calculated from statistical data and from land use and land cover models derived from remote‐sensing data. According to our calculations the human appropriation of aboveground NPP in Austria today amounts to ∼50%. The aboveground standing crop (biomass stock) of the vegetation prevailing in Austria today is ∼64% lower than that of the potential vegetation.