Global variability in leaf respiration in relation to climate, plant functional types and leaf traits.
Leaf dark respiration (Rdark ) is an important yet poorly quantified component of the global carbon cycle. Given this, we analyzed a new global database of Rdark and associated leaf traits. Data for 899 species were compiled from 100 sites (from the Arctic to the tropics). Several woody and nonwoody plant functional types (PFTs) were represented. Mixed-effects models were used to disentangle sources of variation in Rdark . Area-based Rdark at the prevailing average daily growth temperature (T) of each site increased only twofold from the Arctic to the tropics, despite a 20°C increase in growing T (8-28°C). By contrast, Rdark at a standard T (25°C, Rdark (25) ) was threefold higher in the Arctic than in the tropics, and twofold higher at arid than at mesic sites. Species and PFTs at cold sites exhibited higher Rdark (25) at a given photosynthetic capacity (Vcmax (25) ) or leaf nitrogen concentration ([N]) than species at warmer sites. Rdark (25) values at any given Vcmax (25) or [N] were higher in herbs than in woody plants. The results highlight variation in Rdark among species and across global gradients in T and aridity. In addition to their ecological significance, the results provide a framework for improving representation of Rdark in terrestrial biosphere models (TBMs) and associated land-surface components of Earth system models (ESMs).
['Atkin|Owen K|OK|', 'Bloomfield|Keith J|KJ|', 'Reich|Peter B|PB|', 'Tjoelker|Mark G|MG|', 'Asner|Gregory P|GP|', 'Bonal|Damien|D|', 'Bönisch|Gerhard|G|', 'Bradford|Matt G|MG|', 'Cernusak|Lucas A|LA|', 'Cosio|Eric G|EG|', 'Creek|Danielle|D|', 'Crous|Kristine Y|KY|', 'Domingues|Tomas F|TF|', 'Dukes|Jeffrey S|JS|', 'Egerton|John J G|JJ|', 'Evans|John R|JR|', 'Farquhar|Graham D|GD|', 'Fyllas|Nikolaos M|NM|', 'Gauthier|Paul P G|PP|', 'Gloor|Emanuel|E|', 'Gimeno|Teresa E|TE|', 'Griffin|Kevin L|KL|', 'Guerrieri|Rossella|R|', 'Heskel|Mary A|MA|', 'Huntingford|Chris|C|', 'Ishida|Françoise Yoko|FY|', 'Kattge|Jens|J|', 'Lambers|Hans|H|', 'Liddell|Michael J|MJ|', 'Lloyd|Jon|J|', 'Lusk|Christopher H|CH|', 'Martin|Roberta E|RE|', 'Maksimov|Ayal P|AP|', 'Maximov|Trofim C|TC|', 'Malhi|Yadvinder|Y|', 'Medlyn|Belinda E|BE|', 'Meir|Patrick|P|', 'Mercado|Lina M|LM|', 'Mirotchnick|Nicholas|N|', 'Ng|Desmond|D|', 'Niinemets|Ülo|Ü|', "O'Sullivan|Odhran S|OS|", 'Phillips|Oliver L|OL|', 'Poorter|Lourens|L|', 'Poot|Pieter|P|', 'Prentice|I Colin|IC|', 'Salinas|Norma|N|', 'Rowland|Lucy M|LM|', 'Ryan|Michael G|MG|', 'Sitch|Stephen|S|', 'Slot|Martijn|M|', 'Smith|Nicholas G|NG|', 'Turnbull|Matthew H|MH|', 'VanderWel|Mark C|MC|', 'Valladares|Fernando|F|', 'Veneklaas|Erik J|EJ|', 'Weerasinghe|Lasantha K|LK|', 'Wirth|Christian|C|', 'Wright|Ian J|IJ|', 'Wythers|Kirk R|KR|', 'Xiang|Jen|J|', 'Xiang|Shuang|S|', 'Zaragoza-Castells|Joana|J|']
D000064:Acclimatization D057486:Carbon Cycle D002245:Carbon Dioxide D019069:Cell Respiration D002980:Climate D008962:Models, Theoretical D009584:Nitrogen D010641:Phenotype D010788:Photosynthesis D018515:Plant Leaves D010944:Plants D013696:Temperature
respiration plant functional types (PFTs) temperature aridity acclimation climate models leaf nitrogen (N) photosynthesis