Long‐term drivers and timing of accelerated vegetation changes in African biomes and their management implications
Long‐term drivers and timing of accelerated vegetation changes in African biomes and their management implications
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非洲生物群落植被加速变化的长期驱动因素和时间及其管理影响
DOI：
10.1111/geb.13518
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发表时间：
2022
影响因子：
6.4
通讯作者：
Adeonipekun, Peter Adegbenga
中科院分区：
文献类型：
--
作者：
Adeleye, Matthew Adesanya;Connor, Simon Edward;Haberle, Simon Graeme;Ivory, Sarah;Adeonipekun, Peter Adegbenga
由于其多样的生物气候带，悠久的人类历史和强烈的人为影响，非洲提供了一个模型系统，用于研究全球陆地生态系统如何应对加速的社会环境压力。非洲特别容易受到气候变化和人类影响的影响，基线数据不足阻碍了当前的环境管理工作。使用古生态学数据，我们试图确定的时间，速度和驱动力的变化在非洲生物群落在长期的规模，以告知目前的生态系统管理框架在continent.LocationAfrica.Time period 0 -12 ka.Major taxa studiedAfrican biomes.MethodsSixty‐ 4花粉记录在非洲和附近的网站检索从多个数据库/来源和生物群落分组。营业额（量化使用平方弦距离相异度量）和稀疏分析花粉记录在每个生物群系组重建区域时间植被营业额和丰富度。重建植被营业额和丰富的气候，火灾和人类活动的独立记录进行比较，以确定可能的驱动程序的changes.ResultsWe发现，最稳定的生物群落是那些最大的植物区系丰富。南部非洲的地中海型生态系统最稳定，北方非洲的地中海型生态系统最不稳定（主要是由于火灾）。热带稀树草原（TS）和SAM生态系统对≥6 ka的气候变化最为敏感，而热带森林（TF）在人类活动从约2 ka开始加强之前相对稳定。植物区系丰富度也下降了整个热带地区从c。2 ka.Main conclusionsOur analysis pinpoints NAM生态系统正在经历最快的加速营业额在大陆上的火灾，而TF和TS一直在经历前所未有的变化，在过去的2,000年的生物多样性。我们预计生物多样性将进一步变化，气候变得更加温暖和干燥，与长期基线相比，人类的影响是新颖和快速的。
AimOwing to its diverse bioclimatic zones, long human history and intense anthropogenic impacts, Africa provides a model system for studying how global terrestrial ecosystems might respond to accelerated socio‐environmental stress. Africa is particularly vulnerable to climate change and human impact, and insufficient baseline data hamper current environmental management efforts. Using palaeoecological data, we seek to identify the timing, pace and drivers of change in African biomes on a long‐term scale to inform current ecosystem management frameworks on the continent.LocationAfrica.Time period0–12 ka.Major taxa studiedAfrican biomes.MethodsSixty‐four pollen records across Africa and nearby sites were retrieved from multiple databases/sources and grouped into biomes. Turnover (quantified using the squared chord distance dissimilarity metric) and rarefaction analyses were conducted on pollen records in each biome group to reconstruct regional temporal vegetation turnover and richness. Reconstructed vegetation turnover and richness were compared with independent records of climate, fire and human activity to identify possible drivers of change.ResultsWe found that the most stable biomes were those with the greatest floristic richness. Southern Africa's mediterranean‐type (SAM) ecosystems were the most stable and northern Africa's mediterranean‐type (NAM) ecosystems were the most unstable (mainly owing to fire). Tropical savannas (TS) and SAM ecosystems expressed the most sensitivity to climatic shifts from ≥6 ka, whereas tropical forests (TF) were relatively stable before human activities intensified fromc. 2 ka. Floristic richness also declined across the tropics fromc. 2 ka.Main conclusionsOur analysis pinpoints NAM ecosystems as undergoing the fastest acceleration in turnover on the continent in response to fire, whereas TF and TS have been undergoing unprecedented changes in biodiversity in the last 2,000 years. We expect further changes in biodiversity where climate becomes warmer and drier and where human impacts are novel and rapid in comparison to long‐term baselines.
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多样性增加了生态系统的稳定性
DOI：
--
发表时间：
2020
期刊：
bioRxiv
影响因子：
--
作者：
Francesca Arese Lucini;F. Morone;M. Tomassone;H. Makse
通讯作者：
H. Makse
影响因子：
2.5
作者：
W. Gosling;Adele C. M. Julier;S. Adu‐Bredu;G. Djagbletey;W. Fraser;P. Jardine;B. Lomax;Y. Malhi;E. A. Manu;F. Mayle;S. Moore
通讯作者：
W. Gosling;Adele C. M. Julier;S. Adu‐Bredu;G. Djagbletey;W. Fraser;P. Jardine;B. Lomax;Y. Malhi;E. A. Manu;F. Mayle;S. Moore
过去百万年来热带非洲的气候和水文变化
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
F. Gasse
通讯作者：
F. Gasse
DOI：
10.1177/0959683610377532
发表时间：
2011-02
期刊：
The Holocene
影响因子：
--
作者：
A. Mercuri;L. Sadori;Paloma Uzquiano Ollero
通讯作者：
A. Mercuri;L. Sadori;Paloma Uzquiano Ollero
DOI：
10.1073/pnas.2018277118
发表时间：
2021-06-08
影响因子：
11.1
作者：
Kaboth-Bahr, Stefanie;Gosling, William D.;Trauth, Martin H.
通讯作者：
Trauth, Martin H.