1 Department of Chemical and Biochemical Engineering, Technical University of Denmark2 Ecosystems Programme, Department of Chemical and Biochemical Engineering, Technical University of Denmark3 Beijing Normal University4 U.S. Geological Survey5 University of Maryland6 Peking University7 University of Toronto8 Chinese Academy of Sciences9 Climate Research Division10 University of British Columbia11 Central South University of Forestry and Technology12 University of California, Irvine13 University of Helsinki14 Lund University15 Université Laval16 Forestry and Forest Products Research Institute17 Wageningen IMARES18 Vrije Universiteit Amsterdam19 Nagoya University20 Department of Environmental Engineering, Technical University of Denmark21 Russian Academy of Sciences22 Beijing Normal University23 Peking University24 Lund University25 Forestry and Forest Products Research Institute
The satellite-derived normalized difference vegetation index (NDVI), which is used for estimating gross primary production (GPP), often includes contributions from both mosses and vascular plants in boreal ecosystems. For the same NDVI, moss can generate only about one-third of the GPP that vascular plants can because of its much lower photosynthetic capacity. Here, based on eddy covariance measurements, we show that the difference in photosynthetic capacity between these two plant functional types has never been explicitly included when estimating regional GPP in the boreal region, resulting in a substantial overestimation. The magnitude of this overestimation could have important implications regarding a change from a current carbon sink to a carbon source in the boreal region. Moss abundance, associated with ecosystem disturbances, needs to be mapped and incorporated into GPP estimates in order to adequately assess the role of the boreal region in the global carbon cycle.
Nature Communications, 2014, Vol 5
Canada North America Nearctic region; boreal biome; gross primary production\; photosynthesis; Bryophyta Plantae (Bryophytes, Nonvascular Plants, Plants) - Musci  moss common; Plantae (Plants, Vascular Plants) - Tracheophyta  vascular plant common; carbon 7440-44-0 signaling; 07502, Ecology: environmental biology - General and methods; 07506, Ecology: environmental biology - Plant; 10510, Biophysics - Bioenergetics: electron transport and oxidative phosphorylation; 50528, Botany: general and systematic - Floristics and distribution; 51506, Plant physiology - Photosynthesis; Biochemistry and Molecular Biophysics; Ecology, Environmental Sciences; Population Studies; satellite-derived normalized difference vegetation index mathematical and computer techniques; Bioenergetics; Biogeography; Terrestrial Ecology; MULTIDISCIPLINARY; LIGHT-USE EFFICIENCY; NET PRIMARY PRODUCTION; LEAF-AREA; TERRESTRIAL BIOSPHERE; FOREST ECOSYSTEM; CLIMATE-CHANGE; ABSORBED PAR; CO2 FLUX; SATELLITE; PRODUCTIVITY