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DOI	10.1007/s10933-014-9794-2
	Response of Pediastrum in German floodplain lakes to Late Glacial climate changes
	Turner, Falko; Pott, Richard; Schwarz, Anja; Schwalb, Antje
通讯作者	Turner, F (通讯作者)
发表日期	2014
ISSN	0921-2728
EISSN	1573-0417
起始页码	293
结束页码	310
卷号	52 期号:4
英文摘要	Subfossil remains of the Pediastrum-algae group (Fam. Hydrodictyaceae) are frequently found in lake sediments, but very few studies have used them as palaeoclimate and palaeolimnological indicators. This study explored the species composition of Pediastrum assemblages in shallow floodplain lakes in northern Germany during two transitional periods from cold to temperate climate conditions (GS-2/GI-1 and GI-1/Holocene). We identified Pediastrum taxa to subspecies level and used multivariate statistics (constrained clustering, principal component analysis and redundancy analysis) to show that shifts in taxonomic composition reflected the strong Late Glacial climate oscillations. The Pediastrum assemblages indicate that climate amelioration already begun shortly before the main GS-2/GI-1 summer-temperature transition. In contrast to previous studies that identified trophic state as the main driver of change in Pediastrum species composition, we identified climate shifts and related factors as the major drivers of community change. Water depth and trophic state probably acted as secondary factors that were responsible for differences in Pediastrum response between the first and second investigated climate transitions. During cold periods, Pediastrum algae composition was controlled mainly by environmental variables, whereas during warm periods, Pediastrum assemblages may have been influenced to a greater extent by intra- and intergeneric competition. This study contributes to knowledge about ecological niches of Pediastrum species. Size-measurements on Pediastrum coenobia reveal that one response of Pediastrum algae to climate shifts probably was size change. Coenobia of Pseudopediastrum boryanum var. boryanum were significantly smaller during cold climate periods than during temperate periods. The shifts in Pediastrum species composition and coenobium size suggest this algae group has great potential for enabling palaeoecological and palaeoclimate inferences.
关键词	GREEN-ALGAE VEGETATION HISTORY HYDRODICTYACEAE CHLOROPHYCEAE STRATIGRAPHY SPHAEROPLEALES CHRONOLOGY SEQUENCES DENMARK
英文关键词	Pediastrum; Bioindicator; Late Glacial; Climate change; Pollen; Shallow lakes; Europe
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Limnology
WOS记录号	WOS:000345095100002
来源期刊	JOURNAL OF PALEOLIMNOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258306
推荐引用方式 GB/T 7714	Turner, Falko,Pott, Richard,Schwarz, Anja,et al. Response of Pediastrum in German floodplain lakes to Late Glacial climate changes[J]. 中国科学院青藏高原研究所,2014,52(4).
APA	Turner, Falko,Pott, Richard,Schwarz, Anja,&Schwalb, Antje.(2014).Response of Pediastrum in German floodplain lakes to Late Glacial climate changes.JOURNAL OF PALEOLIMNOLOGY,52(4).
MLA	Turner, Falko,et al."Response of Pediastrum in German floodplain lakes to Late Glacial climate changes".JOURNAL OF PALEOLIMNOLOGY 52.4(2014).