globalchange  > 气候减缓与适应
DOI: 10.1016/j.palaeo.2018.10.012
WOS记录号: WOS:000456355800010
论文题名:
Does specialization imply rare fossil records of some benthic foraminifera: Late Palaeocene examples from the eastern Neo-Tethys (Meghalaya, NE India)
作者: Sarkar, Suman
通讯作者: Sarkar, Suman
刊名: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN: 0031-0182
EISSN: 1872-616X
出版年: 2019
卷: 514, 页码:124-134
语种: 英语
英文关键词: Thanetian ; Palaeoecology ; Haymanella elongata ; Keramosphaera iranica ; Foraminiferal migration
WOS关键词: EOCENE THERMAL MAXIMUM ; SOUTH SHILLONG PLATEAU ; CORALLINE RED ALGAE ; LARGER FORAMINIFERA ; CLIMATE-CHANGE ; RANGE SHIFTS ; SEA-LEVEL ; ECOLOGICAL SPECIALIZATION ; CARBONATE SEDIMENTATION ; LAKADONG LIMESTONE
WOS学科分类: Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向: Physical Geography ; Geology ; Paleontology
英文摘要:

The palaeoecological characteristics of Late Palaeocene benthic foraminifera from the eastern Neo-Tethyan sediments of Meghalaya, NE India, are poorly understood. The assignment of taxa as generalists or specialists is a fundamental aspect of ecology that is not given sufficient attention in palaeoecological analyses. The first records of Haymanella elongata and Keramosphaera iranica from the Upper Palaeocene carbonate sedimentary rocks outcropping in the East Khasi Hills, Meghalaya, NE India, are documented herein. These species occurred in warm, hydrodynamically energetic shallow-marine environments as indicated by their associations only with grain-supported microfacies and co-occurrence with taxa assumed to have hosted algal endosymbionts including Operculina, Nummulites, Assilina, Orbitoclypeus, and Discocyclina. H. elongata and K. iranica were found in very narrow horizons of the evaluated sections, which was interpreted as indicating specialization to very specific habitats. Rare records of both these benthic foraminifera can be attributed to their specialist behavior that did not allow the populations to persist in fluctuating environments. In comparison to these specialists, more abundant and potential generalist foraminiferal taxa thrived in the region for longer periods. It is deduced that H. elongata and K. iranica migrated to the study area from the Mediterranean regions but did not thrive.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/127937
Appears in Collections:气候减缓与适应

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作者单位: Birbal Sahni Inst Paleosci, 53 Univ Rd, Lucknow 226007, Uttar Pradesh, India

Recommended Citation:
Sarkar, Suman. Does specialization imply rare fossil records of some benthic foraminifera: Late Palaeocene examples from the eastern Neo-Tethys (Meghalaya, NE India)[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2019-01-01,514:124-134
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