干旱区生态环境知识资源中心(Arid): Mid-to Late Holocene paleoclimatic changes and paleoenvironmental shifts inferred from pollen and diatom assemblages at Lake Hamra, Wadi El Natrun (Western Nile Delta, North Western Desert, Egypt)

Arid

DOI	10.1016/j.quaint.2020.03.024
	Mid-to Late Holocene paleoclimatic changes and paleoenvironmental shifts inferred from pollen and diatom assemblages at Lake Hamra, Wadi El Natrun (Western Nile Delta, North Western Desert, Egypt)
	Zaky, Amr S.1,6; Kashima, Kaoru 2; Frontalini, Fabrizio 3; Ibrahim, Mohamed I. A.4; Khalifa, Moataz M.1; Fukumoto, Yu 2; Gad, Dina 5; Behling, Hermann 6
通讯作者	Zaky, Amr S.
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2020
卷号	542 页码:109-120
英文摘要	Four palynological and three diatom zones of Mid-to Late Holocene are identified along a 370-cm-long radiocarbon dated sediment core collected in Lake Hamra at Wadi El Natrun (Western Nile Delta, Egypt). The Mid-Late Holocene between the Predynastic to Old Kingdom was terrestrial wetland habitat with high seasonal rainfall and/or Nile flood as revealed by the dominance of Cyperaceae pollen. Therefore, people gathered in and around the Nile Valley and the agricultural activities increased. During the early stage of Late Holocene coincident with the Old Kingdom to Middle Kingdom, the paleoclimate became more arid with low seasonal precipitation and/or Nile flood as reflected by the increasing abundance of Poaceae pollen and the absence of diatoms in addition to low values of TOC, TN, TS, C/S and high values of C/N. These drought conditions possibly played a role in the Old Kingdom collapsing. The late stage of the Late Holocene showed terrestrial wetland habitat with brackish conditions coupled with aquatic contribution under oxic conditions as inferred by the dominance of Typha sp. and Amaranthaceae pollens as well as the diatom assemblages. The relatively high values of TOC, C/N, C/S coupled with low values of TS and TN reveal terrestrial origin of organic matter. The Late Holocene-recent has turned into a terrestrial wetland habitat with more brackish conditions and increasing in the seasonal rainfall as supported by the marked increasing of Cyperaceae pollen. The overall increase of the Diatom Inferred Salinity (DIS) as well as the marked increasing of C/S, TN and decreasing of TOC, C/N and TS values towards the recent point to higher saline brackish wetland paleoenvironment and a terrestrial origin of the organic matter with more aquatic contribution under oxic conditions.
英文关键词	Holocene Pollen Paleoclimate Diatoms Paleoenvironment Lake Hamra Wadi El Natrun Egypt
类型	Article
语种	英语
国家	Egypt ; Japan ; Italy ; Germany
收录类别	SCI-E
WOS记录号	WOS:000536210000010
WOS关键词	QINGHAI-TIBET PLATEAU ; ASIAN MONSOON MARGIN ; ENVIRONMENTAL-CHANGES ; ORGANIC-MATTER ; PALEOLIMNOLOGICAL RECONSTRUCTIONS ; CLIMATIC CHANGES ; EASTERN SAHARA ; HUMID PERIOD ; SEDIMENTS ; AFRICA
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318543
作者单位	1.Menoufia Univ, Dept Geol, Fac Sci, Menoufia, Egypt; 2.Kyushu Univ, Dept Earth & Planetary Sci, Fac Sci, Fukuoka, Japan; 3.Urbino Univ, Dept Pure & Appl Sci, Urbino, Italy; 4.Alexandria Univ, Fac Sci, Dept Environm Sci, Alexandria, Egypt; 5.Menoufia Univ, Fac Sci, Dept Bot & Microbiol, Menoufia, Egypt; 6.Gottingen Univ, Dept Palynol & Climate Dynam, Gottingen, Germany
推荐引用方式 GB/T 7714	Zaky, Amr S.,Kashima, Kaoru,Frontalini, Fabrizio,et al. Mid-to Late Holocene paleoclimatic changes and paleoenvironmental shifts inferred from pollen and diatom assemblages at Lake Hamra, Wadi El Natrun (Western Nile Delta, North Western Desert, Egypt)[J],2020,542:109-120.
APA	Zaky, Amr S..,Kashima, Kaoru.,Frontalini, Fabrizio.,Ibrahim, Mohamed I. A..,Khalifa, Moataz M..,...&Behling, Hermann.(2020).Mid-to Late Holocene paleoclimatic changes and paleoenvironmental shifts inferred from pollen and diatom assemblages at Lake Hamra, Wadi El Natrun (Western Nile Delta, North Western Desert, Egypt).QUATERNARY INTERNATIONAL,542,109-120.
MLA	Zaky, Amr S.,et al."Mid-to Late Holocene paleoclimatic changes and paleoenvironmental shifts inferred from pollen and diatom assemblages at Lake Hamra, Wadi El Natrun (Western Nile Delta, North Western Desert, Egypt)".QUATERNARY INTERNATIONAL 542(2020):109-120.