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Human settlement of East Polynesia earlier, incremental, and coincident with prolonged South Pacific drought 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (16) : 8813-8819
作者:  Sear, David A.;  Allen, Melinda S.;  Hassall, Jonathan D.;  Maloney, Ashley E.;  Langdon, Peter G.;  Morrison, Alex E.;  Henderson, Andrew C. G.;  Mackay, Helen;  Croudace, Ian W.;  Clarke, Charlotte;  Sachs, Julian P.;  Macdonald, Georgiana;  Chiverrell, Richard C.;  Leng, Melanie J.;  Cisneros-Dozal, L. M.;  Fonville, Thierry
收藏  |  浏览/下载:15/0  |  提交时间:2020/05/13
Polynesian voyaging  East Polynesian colonization  biomarkers  drought  palaeoclimate  
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:30/0  |  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.


  
Effects of two centuries of global environmental variation on phenology and physiology of Arabidopsis thaliana 期刊论文
GLOBAL CHANGE BIOLOGY, 2019
作者:  DeLeo, Victoria L.;  Menge, Duncan N. L.;  Hanks, Ephraim M.;  Juenger, Thomas E.;  Lasky, Jesse R.
收藏  |  浏览/下载:11/0  |  提交时间:2020/02/17
abiotic stress  climate change  generalized additive model  phenology  Delta C-13  
Natural hazard threats to pollinators and pollination 期刊论文
GLOBAL CHANGE BIOLOGY, 2019
作者:  Nicholson, Charlie C.;  Egan, Paul A.
收藏  |  浏览/下载:10/0  |  提交时间:2019/11/27
disturbance  ecosystem service  extreme event  extreme weather  natural hazard  pollination  resilience  vulnerability  
Effects of 21st-century climate, land use, and disturbances on ecosystem carbon balance in California 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (10) : 3334-3353
作者:  Sleeter, Benjamin M.;  Marvin, David C.;  Cameron, D. Richard;  Selmants, Paul C.;  Westerline, A. LeRoy;  Kreitler, Jason;  Daniel, Colin J.;  Liu, Jinxun;  Wilson, Tamara S.
收藏  |  浏览/下载:8/0  |  提交时间:2019/11/27
California  carbon balance  climate change  disturbance  land use  scenarios  
Alternative transient states and slow plant community responses after changed flooding regimes 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (4) : 1358-1367
作者:  Sarneel, Judith M.;  Hefting, Mariet M.;  Kowalchuk, George A.;  Nilsson, Christer;  Van der Velden, Merit;  Visser, Eric J. W.;  Voesenek, Laurentius A. C. J.;  Jansson, Roland
收藏  |  浏览/下载:9/0  |  提交时间:2019/04/09
alternative stable states  drought events  flood regime change  hydrological alterations  hysteresis  riparian vegetation  river restoration  species traits  
Termites mitigate the effects of drought in tropical rainforest 期刊论文
SCIENCE, 2019, 363 (6423) : 174-177
作者:  Ashton, L. A.;  Griffiths, H. M.;  Parr, C. L.;  Evans, T. A.;  Didham, R. K.;  Hasan, F.;  Teh, Y. A.;  Tin, H. S.;  Vairappan, C. S.;  Eggleton, P.
收藏  |  浏览/下载:1/0  |  提交时间:2019/11/27
Effects of fossil fuel and total anthropogenic emission removal on public health and climate 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (15) : 7192-7197
作者:  Lelieveld, J.;  Klingmueller, K.;  Pozzer, A.;  Burnett, R. T.;  Haines, A.;  Ramanathan, V.
收藏  |  浏览/下载:8/0  |  提交时间:2019/11/27
air pollution  greenhouse gases  health impacts  climate change  hydrologic cycle  
Groundwater drawdown drives ecophysiological adjustments of woody vegetation in a semi-arid coastal ecosystem 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (10) : 4894-4908
作者:  Antunes, Cristina;  Chozas, Sergio;  West, Jason;  Zunzunegui, Maria;  Diaz Barradas, Maria Cruz;  Vieira, Simone;  Maguas, Cristina
收藏  |  浏览/下载:6/0  |  提交时间:2019/04/09
coastal dune ecosystem  groundwater table depth  photosynthetic activity  physiological responses  plant functional types  plant water status  water table lowering  water-uptake depth  
The effects of El Nino-Southern Oscillation events on intertidal seagrass beds over a long-term timescale 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (10) : 4566-4580
作者:  Lin, Hsing-Juh;  Lee, Chen-Lu;  Peng, Shang-En;  Hung, Meng-Chi;  Liu, Pi-Jen;  Mayfield, Anderson B.
收藏  |  浏览/下载:8/0  |  提交时间:2019/04/09
ENSO  eutrophication  Halodule uninervis  La Nina  periphyton  Thalassia hemprichii