GSTDTAP

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颗粒有机碳的主导地位导致北极土壤有机碳更易受气候影响 快报文章
气候变化快报,2024年第2期
作者:  董利苹
Microsoft Word(27Kb)  |  收藏  |  浏览/下载:401/1  |  提交时间:2024/01/19
Cold Regions  Particulate Organic Carbon  Top Mineral Soils  Dominance  
Global-scale human impact on delta morphology has led to net land area gain 期刊论文
NATURE, 2020, 577 (7791) : 514-+
作者:  Nienhuis, J. H.;  Ashton, A. D.;  Edmonds, D. A.;  Hoitink, A. J. F.;  Kettner, A. J.;  Rowland, J. C.;  Tornqvist, T. E.
收藏  |  浏览/下载:8/0  |  提交时间:2020/05/13

River deltas rank among the most economically and ecologically valuable environments on Earth. Even in the absence of sea-level rise, deltas are increasingly vulnerable to coastal hazards as declining sediment supply and climate change alter their sediment budget, affecting delta morphology and possibly leading to erosion(1-3). However, the relationship between deltaic sediment budgets, oceanographic forces of waves and tides, and delta morphology has remained poorly quantified. Here we show how the morphology of about 11,000 coastal deltas worldwide, ranging from small bayhead deltas to mega-deltas, has been affected by river damming and deforestation. We introduce a model that shows that present-day delta morphology varies across a continuum between wave (about 80 per cent), tide (around 10 per cent) and river (about 10 per cent) dominance, but that most large deltas are tide- and river-dominated. Over the past 30 years, despite sea-level rise, deltas globally have experienced a net land gain of 54 +/- 12 square kilometres per year (2 standard deviations), with the largest 1 per cent of deltas being responsible for 30 per cent of all net land area gains. Humans are a considerable driver of these net land gains-25 per cent of delta growth can be attributed to deforestation-induced increases in fluvial sediment supply. Yet for nearly 1,000 deltas, river damming(4) has resulted in a severe (more than 50 per cent) reduction in anthropogenic sediment flux, forcing a collective loss of 12 +/- 3.5 square kilometres per year (2 standard deviations) of deltaic land. Not all deltas lose land in response to river damming: deltas transitioning towards tide dominance are currently gaining land, probably through channel infilling. With expected accelerated sea-level rise(5), however, recent land gains are unlikely to be sustained throughout the twenty-first century. Understanding the redistribution of sediments by waves and tides will be critical for successfully predicting human-driven change to deltas, both locally and globally.


A global study of river deltas shows a net increase in delta area by about 54 km(2) yr(-1) over the past 30 years, in part due to deforestation-induced sediment delivery increase.


  
Linking forest growth with stand structure: Tree size inequality, tree growth or resource partitioning and the asymmetry of competition 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 447: 139-157
作者:  Forrester, David, I
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/27
Asymmetric competition  Climate change  Continuous cover forestry  Growth dominance  Mixed species  Multi-aged  Size heterogeneity  Uneven-aged  
Experimental dominant plant removal results in contrasting assembly for dominant and non-dominant plants 期刊论文
ECOLOGY LETTERS, 2019, 22 (8) : 1233-1242
作者:  Arnillas, Carlos Alberto;  Cadotte, Marc W.
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Community assembly  determinism  dominance  dominant removal  meadows  neutral theory  non-dominance  phylogenetic relatedness  predictability  stochasticity  
The landscape context of family forests in the United States: Anthropogenic interfaces and forest fragmentation from 2001 to 2011 期刊论文
LANDSCAPE AND URBAN PLANNING, 2019, 188: 64-71
作者:  Riitters, Kurt;  Costanza, Jennifer
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Landscape pattern  Forest dominance  Landscape mosaic  Forest inventory  Wildland-urban interface  Neighborhood analysis  
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  
Hydraulic limitations in dominant trees as a contributing mechanism to the age-related growth decline of boreal forest stands 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2018, 427: 135-142
作者:  Baret, Matthieu;  Pepin, Steeve;  Pothier, David
收藏  |  浏览/下载:9/0  |  提交时间:2019/04/09
Growth dominance  Stem sapflow  Leaf isotopic composition  Stand development  Old-growth stands  
Dominance-diversity relationships in ant communities differ with invasion 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (10) : 4614-4625
作者:  Arnan, Xavier;  Andersen, Alan N.;  Gibb, Heloise;  Parr, Catherine L.;  Sanders, Nathan J.;  Dunn, Robert R.;  Angulo, Elena;  Baccaro, Fabricio B.;  Bishop, Tom R.;  Boulay, Raphael;  Castracani, Cristina;  Cerda, Xim;  Del Toro, Israel;  Delsinne, Thibaut;  Donoso, David A.;  Elten, Emilie K.;  Fayle, Tom M.;  Fitzpatrick, Matthew C.;  Gomez, Crisanto;  Grasso, Donato A.;  Grossman, Blair F.;  Guenard, Benoit;  Gunawardene, Nihara;  Heterick, Brian;  Hoffmann, Benjamin D.;  Janda, Milan;  Jenkins, Clinton N.;  Klimes, Petr;  Lach, Lori;  Laeger, Thomas;  Leponce, Maurice;  Lucky, Andrea;  Majer, Jonathan;  Menke, Sean;  Mezger, Dirk;  Mori, Alessandra;  Moses, Jimmy;  Munyai, Thinandavha Caswell;  Paknia, Omid;  Pfeiffer, Martin;  Philpott, Stacy M.;  Souza, Jorge L. P.;  Tista, Melanie;  Vasconcelos, Heraldo L.;  Retana, Javier
收藏  |  浏览/下载:13/0  |  提交时间:2019/04/09
ants  behavioral dominance  coexistence  dominance-impoverishment rule  global scale  invasive species  precipitation  species richness  temperature  
Divesting, Fast and Slow: Affective and Cognitive Drivers of Fading Voter Support for a Nuclear Phase-Out 期刊论文
ECOLOGICAL ECONOMICS, 2018, 152: 51-61
作者:  Rinscheid, Adrian;  Wuestenhagen, Rolf
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Divestment  Nuclear power  Voting behavior  Dual-process models  Affect heuristic  Asymmetric dominance effect  
Manipulating badges of status only fools strangers 期刊论文
ECOLOGY LETTERS, 2018, 21 (10) : 1477-1485
作者:  Chaine, Alexis S.;  Shizuka, Daizaburo;  Block, Theadora A.;  Zhang, Lynn;  Lyon, Bruce E.
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/09
Badge of status  individual recognition  social dominance  social recognition  social structure