2篇
您的检索式：作者名="Qiuchi Wan"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Inconsistent interspecific and intraspecific differentiation of climate envelopes in a subtropical tree显示文摘Aims Comparisons of climate envelopes among species have shown that niche conservatism tends to break down over time.Here,we use the Asian tree genus Platycarya(Juglandaceae)as a case study to test this tendency at relatively short timescales in a single lineage.This,together with a reanalysis of the extant literature,should help evaluate prospects of using correlations between climate and spe-cies occurrence data to infer evolutionary processes.Methods We rely on species distribution models(SDMs)and multivari-ate analyses to compare current and past(Last Glacial Maximum~21ka)climatic envelopes between the two extant Platycarya spe-cies(Platycarya strobilacea and Platycarya longipes)and between mainland and Taiwan populations of P.strobilacea,paying particu-lar attention to autocorrelation issues.We also review interpreta-tions provided in similar studies comparing climate envelopes between and within species,including in studies involving native and introduced populations of the same species.Important Findings We find intraspecific but not interspecific differentiation in climate envelopes of Platycarya,despite the prediction that niche differen-tiation should be stronger between older groups.Our review also suggests that differentiation in climate envelopes need not imply rapid evolutionary divergence.Whereas SDMs can be used to raise evolutionary hypotheses to be validated with other data,we con-clude that it should not be used to directly infer short-term evolu-tionary processes. | Qiuchi Wan Zhuo Zheng Marta Benito-Garzón Rémy J.Petit | 2019 | Journal of Plant Ecology2019，12，1： | 0 |
| 2 | Holocene millennial-scale megaflood events point to ENSO-driven extreme climate changes显示文摘Reconstructing the Holocene megaflood history is a key component of understanding the mechanism of past climate change and assessing the potential impact of future catastrophic events.The Pearl River is the longest watercourse in southern China,and its lower reach has been identified as one of the world's most vulnerable regions for flood exposure.However,there is a complete lack of millennial-scale geological records of paleomegafloods for the future prediction of once-in-a-hundred(even once-in-a-thousand)year floods in southern China.Here,we identified a series of paleomegaflood deposits interbedded with wood-rich peat layers in the lower West Pearl River area.All paleoflood layers have been well dated using AMS~(14)C dating method.According to the regional correlation of the flood sequence,sediment characteristics and provenance analysis,there have been at least 7 megafloods corresponding to once-in-a-thousand-year events in the lower reaches of the West Pearl River during the past 6000 years,with an average return period of approximately 855 years.The identified paleomegafloods were coeval with periods of strong El Ni?o-Southern Oscillation(ENSO),indicating that weakening of the Asian summer monsoon,associated with enhanced ENSO variability,may have triggered abnormally high precipitation leading to flooding of exceptional magnitude in southern China.In addition,the most prominent paleomegafloods identified in the lower Pearl River coincided with intervals of lower precipitation and fewer storms in central-eastern China,indicating the intensification of the meridional“tripole”pattern of precipitation across eastern China during the latter half of the Holocene.Increased land use and deforestation over the last 2000 years have resulted in soil loss and rapid degradation of local primeval forest ecosystems,leading to more catastrophic flooding.Large amounts of rice pollen in the uppermost flood layer during the Song Dynasty indicate that this megaflood may have inundated a large area of cultivated land.The periodic occurrence of Holocene megafloods not only caused damage to human existence,but also affected the evolution of local civilization.This study reveals for the first time a series of Holocene millennial-scale megafloods and sheds new light on the importance of atmosphere-ocean interactions in the tropical Pacific and monsoon subtropical climate dynamics for precipitation anomalies in East Asia.Our data yield valuable information for future research into climate extremes and hazard prevention. | Cong CHEN Yanwei ZHENG Zhuo ZHENG Yongqiang ZONG Kangyou HUANG Barry VROLETT Huanhuan PENG Xiao ZHANG Yongjie TANG Qiuchi WAN Guifang ZHANG Rachid CHEDADDI | 2023 | Science China Earth Sciences2023，66，11： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员