干旱区生态环境知识资源中心(Arid): Benthic invertebrate communities as a function of sea-level fluctuations and hydrodynamics: A case from the Cenomanian-Turonian of Wadi Tarfa (Eastern Desert, Egypt)

Arid

DOI	10.1016/j.jafrearsci.2020.103870
	Benthic invertebrate communities as a function of sea-level fluctuations and hydrodynamics: A case from the Cenomanian-Turonian of Wadi Tarfa (Eastern Desert, Egypt)
	Abdelhady, Ahmed Awad; Mohamed, Ramadan; Fathy, Douaa; Ali, Ahmed
通讯作者	Abdelhady, AA
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2020
卷号	168
英文摘要	Understanding the response of the benthic invertebrates to long-term sea-level changes, which is possible only from the fossil record, is crucial for conservation biology. Based on integrated sedimentological and biostrati-graphical data from the Cenomanian-Turonian succession of Wadi Tarfa (Eastern Desert, Egypt), a cyclic pattern, comparable to those of (2nd) order sequence stratigraphy, between the community structure of the invertebrates and the sea-level fluctuations was revealed. Quantitative analysis of 1756 specimens representing 154 invertebrate genera encompassing mollusks and echinoid revealed that invertebrate communities can be classified into three different types. The first associated with the initiation of transgression (TST) and dominated mainly by opportunistic, epifaunal suspension-feeders, including gastropods and bivalves. This community is characterized by lower diversity values. The second community belonged to the maximum flooding zone (MFZ) and mainly dominated by infaunal deposit-feeders of irregular echinoids and bivalves and characterized by higher diversity. The last community is less diverse, dominated by few epifaunal-suspension feeders and occupying the late highstand system tract (HST). The lower diversity values during the early TST/late HST may result from the persistence of waves/the higher sedimentation rates. Consequently, only opportunistic taxa flourished. In contrast, diversity increases with flooding and is at a maximum and dominance at a minimum at the transgression peak (MFZ). Here, the high diversity, which is commonly augmented by time-averaging, most likely contributed also to the environmental stability, which increases with flooding. Accumulation of biogenic hardparts in combination with low rates of sedimentation may increase substrate heterogeneity and thus increases beta diversity (niche differentiation). The cyclic pattern of the community attributes results from the hydrodynamic setting accompanying the sea-level changes. The role of ecoenvironmental and taphonomic mechanisms in shell concentrations are also discussed.
英文关键词	Community structure Invertebrates Hydrodynamics Sea-level Upper Cretaceous North Africa
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000540173100016
WOS关键词	MAGHARA NORTH SINAI ; SEQUENCE STRATIGRAPHY ; DEPOSITIONAL-ENVIRONMENTS ; GALALA FORMATION ; CARBONATE RAMP ; NILE-DELTA ; PALEOECOLOGY ; ARCHITECTURE ; TAPHONOMY ; WEST
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324740
作者单位	[Abdelhady, Ahmed Awad; Mohamed, Ramadan; Fathy, Douaa; Ali, Ahmed] Menia Univ, Fac Sci, Geol Dept, Al Minya 61519, Egypt
推荐引用方式 GB/T 7714	Abdelhady, Ahmed Awad,Mohamed, Ramadan,Fathy, Douaa,et al. Benthic invertebrate communities as a function of sea-level fluctuations and hydrodynamics: A case from the Cenomanian-Turonian of Wadi Tarfa (Eastern Desert, Egypt)[J],2020,168.
APA	Abdelhady, Ahmed Awad,Mohamed, Ramadan,Fathy, Douaa,&Ali, Ahmed.(2020).Benthic invertebrate communities as a function of sea-level fluctuations and hydrodynamics: A case from the Cenomanian-Turonian of Wadi Tarfa (Eastern Desert, Egypt).JOURNAL OF AFRICAN EARTH SCIENCES,168.
MLA	Abdelhady, Ahmed Awad,et al."Benthic invertebrate communities as a function of sea-level fluctuations and hydrodynamics: A case from the Cenomanian-Turonian of Wadi Tarfa (Eastern Desert, Egypt)".JOURNAL OF AFRICAN EARTH SCIENCES 168(2020).