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Asynchronous carbon sink saturation in African and Amazonian tropical forests 期刊论文
NATURE, 2020, 579 (7797) : 80-+
作者:  Wannes Hubau;  Simon L. Lewis;  Oliver L. Phillips;  Kofi Affum-Baffoe;  Hans Beeckman;  Aida Cuní;  -Sanchez;  Armandu K. Daniels;  Corneille E. N. Ewango;  Sophie Fauset;  Jacques M. Mukinzi;  Douglas Sheil;  Bonaventure Sonké;  Martin J. P. Sullivan;  Terry C. H. Sunderland;  Hermann Taedoumg;  Sean C. Thomas;  Lee J. T. White;  Katharine A. Abernethy;  Stephen Adu-Bredu;  Christian A. Amani;  Timothy R. Baker;  Lindsay F. Banin;  Fidè;  le Baya;  Serge K. Begne;  Amy C. Bennett;  Fabrice Benedet;  Robert Bitariho;  Yannick E. Bocko;  Pascal Boeckx;  Patrick Boundja;  Roel J. W. Brienen;  Terry Brncic;  Eric Chezeaux;  George B. Chuyong;  Connie J. Clark;  Murray Collins;  James A. Comiskey;  David A. Coomes;  Greta C. Dargie;  Thales de Haulleville;  Marie Noel Djuikouo Kamdem;  Jean-Louis Doucet;  Adriane Esquivel-Muelbert;  Ted R. Feldpausch;  Alusine Fofanah;  Ernest G. Foli;  Martin Gilpin;  Emanuel Gloor;  Christelle Gonmadje;  Sylvie Gourlet-Fleury;  Jefferson S. Hall;  Alan C. Hamilton;  David J. Harris;  Terese B. Hart;  Mireille B. N. Hockemba;  Annette Hladik;  Suspense A. Ifo;  Kathryn J. Jeffery;  Tommaso Jucker;  Emmanuel Kasongo Yakusu;  Elizabeth Kearsley;  David Kenfack;  Alexander Koch;  Miguel E. Leal;  Aurora Levesley;  Jeremy A. Lindsell;  Janvier Lisingo;  Gabriela Lopez-Gonzalez;  Jon C. Lovett;  Jean-Remy Makana;  Yadvinder Malhi;  Andrew R. Marshall;  Jim Martin;  Emanuel H. Martin;  Faustin M. Mbayu;  Vincent P. Medjibe;  Vianet Mihindou;  Edward T. A. Mitchard;  Sam Moore;  Pantaleo K. T. Munishi;  Natacha Nssi Bengone;  Lucas Ojo;  Fidè;  le Evouna Ondo;  Kelvin S.-H. Peh;  Georgia C. Pickavance;  Axel Dalberg Poulsen;  John R. Poulsen;  Lan Qie;  Jan Reitsma;  Francesco Rovero;  Michael D. Swaine;  Joey Talbot;  James Taplin;  David M. Taylor;  Duncan W. Thomas;  Benjamin Toirambe;  John Tshibamba Mukendi;  Darlington Tuagben;  Peter M. Umunay;  Geertje M. F. van der Heijden;  Hans Verbeeck;  Jason Vleminckx;  Simon Willcock;  Hannsjö;  rg Wö;  ll;  John T. Woods;  Lise Zemagho
收藏  |  浏览/下载:23/0  |  提交时间:2020/05/13

Structurally intact tropical forests sequestered about half of the global terrestrial carbon uptake over the 1990s and early 2000s, removing about 15 per cent of anthropogenic carbon dioxide emissions(1-3). Climate-driven vegetation models typically predict that this tropical forest '  carbon sink'  will continue for decades(4,5). Here we assess trends in the carbon sink using 244 structurally intact African tropical forests spanning 11 countries, compare them with 321 published plots from Amazonia and investigate the underlying drivers of the trends. The carbon sink in live aboveground biomass in intact African tropical forests has been stable for the three decades to 2015, at 0.66 tonnes of carbon per hectare per year (95 per cent confidence interval 0.53-0.79), in contrast to the long-term decline in Amazonian forests(6). Therefore the carbon sink responses of Earth'  s two largest expanses of tropical forest have diverged. The difference is largely driven by carbon losses from tree mortality, with no detectable multi-decadal trend in Africa and a long-term increase in Amazonia. Both continents show increasing tree growth, consistent with the expected net effect of rising atmospheric carbon dioxide and air temperature(7-9). Despite the past stability of the African carbon sink, our most intensively monitored plots suggest a post-2010 increase in carbon losses, delayed compared to Amazonia, indicating asynchronous carbon sink saturation on the two continents. A statistical model including carbon dioxide, temperature, drought and forest dynamics accounts for the observed trends and indicates a long-term future decline in the African sink, whereas the Amazonian sink continues to weaken rapidly. Overall, the uptake of carbon into Earth'  s intact tropical forests peaked in the 1990s. Given that the global terrestrial carbon sink is increasing in size, independent observations indicating greater recent carbon uptake into the Northern Hemisphere landmass(10) reinforce our conclusion that the intact tropical forest carbon sink has already peaked. This saturation and ongoing decline of the tropical forest carbon sink has consequences for policies intended to stabilize Earth'  s climate.


  
Root biomass allocation in southern temperate forests 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 453
作者:  Easdale, Tomas A.;  Richardson, Sarah J.;  Marden, Michael;  England, Jacqueline R.;  Gayoso-Aguilar, Jorge;  Guerra-Carcamo, Javier E.;  McCarthy, James K.;  Paul, Keryn I.;  Schwendenmann, Luitgard;  Brandon, Andrea M.
收藏  |  浏览/下载:11/0  |  提交时间:2020/02/17
Root:shoot ratio  Below-ground biomass  Tree size  Nothofagaceae  Eucalyptus  Tree fern  
Phenology, flowering and fruit-set patterns of baobabs, Adansonia digitata, in southern Africa 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 453
作者:  Venter, Sarah M.;  Witkowski, Ed T. F.
收藏  |  浏览/下载:7/0  |  提交时间:2020/02/17
Excess flowering  Inter-annual variation  Leaf-flush  Land-use type  Malvaceae  Tree size  
Overstory trees in excess: A threat to restoration success in Brazilian Atlantic forest 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 449
作者:  Cardoso de Oliveira, Carlos Delano;  Cardoso de Oliveira, Izabela Regina;  Suganuma, Marcio Seiji;  Durigan, Giselda
收藏  |  浏览/下载:5/0  |  提交时间:2019/11/27
Asymmetric competition  Carbon balance  Density  Forest structure  Forest restoration  Natural regeneration  Tree size classes  Understorey  
Analysing the growth dynamics of mixed stands composed of balsam fir and broadleaved species of various shade tolerances 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 444: 21-29
作者:  Pothier, David
收藏  |  浏览/下载:4/0  |  提交时间:2019/11/27
Growth dominance  Size-symmetric competition  Tree growth  Tree size  Stand productivity  
Relationships between tree survival, stand structure and age in trembling aspen dominated stands 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 438: 114-122
作者:  Kweon, Deogkyu;  Comeau, Philip G.
收藏  |  浏览/下载:5/0  |  提交时间:2019/11/26
Trembling aspen (Populus tremuloides Michx.)  Survival probability  Tree core analysis  Stand structure (Tree size diversity)  Tree size (DBH)  Intraspecific competition  Climate  
Allometric equations for Sequoia sempervirens in forests of different ages 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 433: 349-363
作者:  Sillett, Stephen C.;  Van Pelt, Robert;  Carroll, Allyson L.;  Campbell-Spickler, Jim;  Coonen, Ethan J.;  Iberle, Benjamin
收藏  |  浏览/下载:7/0  |  提交时间:2019/04/09
Tree size  Tree age  Aboveground biomass  Fritz Wonder Plot  Forest canopy structure  
Factors influencing overyielding in young boreal mixedwood stands in western Canada 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 432: 546-557
作者:  Kweon, Deogkyu;  Comeau, Philip G.
收藏  |  浏览/下载:8/0  |  提交时间:2019/04/09
Young boreal mixedwood stands  Mixing effect  Overyielding  Shade tolerance  Species composition  Stand density  Tree size  Stress gradient hypothesis  
Development and dominance of Douglas-fir in North American rainforests 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2018, 429: 93-114
作者:  Sillett, Stephen C.;  Van Pelt, Robert;  Freund, James A.;  Campbell-Spickler, Jim;  Carroll, Allyson L.;  Kramer, Russell D.
收藏  |  浏览/下载:9/0  |  提交时间:2019/04/09
Pseudotsuga menziesii  Tree size  Tree age  Crown structure  Biomass  Leaf area  Allometric equations  Forest development  
What controls local-scale aboveground biomass variation in central Africa? Testing structural, composition and architectural attributes 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2018, 429: 570-578
作者:  Panzoua, Grace Jopaul Loubota;  Fayolle, Adeline;  Feldpausch, Ted R.;  Ligot, Gauthier;  Doucet, Jean-Louis;  Forni, Eric;  Zombo, Isaac;  Mazengue, Mathurin;  Loumeto, Jean-Joel;  Gourlet-Fleury, Sylvie
收藏  |  浏览/下载:8/0  |  提交时间:2019/04/09
Tree allometry  AGB estimation  Basal area  Wood density  Total height  Crown size  Central Africa