The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes

A diatom analysis of a peat deposit from Shemya Island (Aleutian Arc, USA) is performed, and the dynamics of the diatom community are described. According to the radiocarbon dating, the formation of the deposit began 9300 cal. years BP. Principal component analysis made it possible to relate the dyn...

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Autores principales:	Alisa A. Neplyukhina, Andrey V. Tchabovsky, Maria A. Gololobova, Olesya I. Smyshlyaeva, Olga A. Krylovich, Arkady B. Savinetsky, Alexey A. Kotov
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	diatoms diatom analysis principal component analysis (PCA) climate reconstruction Aleutian Islands Shemya Island Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/87a386aadd474205803d701b42432325
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spelling	oai:doaj.org-article:87a386aadd474205803d701b424323252021-11-11T19:58:23ZThe Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes10.3390/w132131342073-4441https://doaj.org/article/87a386aadd474205803d701b424323252021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/3134https://doaj.org/toc/2073-4441A diatom analysis of a peat deposit from Shemya Island (Aleutian Arc, USA) is performed, and the dynamics of the diatom community are described. According to the radiocarbon dating, the formation of the deposit began 9300 cal. years BP. Principal component analysis made it possible to relate the dynamics of the diatom community to certain environmental conditions and the factors that influenced the coastal ecosystems during its formation. The following factors (predictors) were considered: the influence of age, zoo- and anthropogenic effects, and changes in climatic conditions. Sea level change was the main driver of the diatom community in the studied water body having a continuous direct and indirect influence on the studied small water body, i.e., by bird colony formation and more humid and coastal conditions. Since 3000–2000 cal. years BP, the anthropogenic factor (hunting depression of the bird colony) also became significant. During the whole water body lifetime and following peat formation, the diatom community was influenced by groups of factors: global factors (e.g., sea level rise) caused gradual change of local factors, which resulted in smooth shifts in community. In contrast, local factor influence (bird colony rise and fall due to human activity) caused abrupt and transient shifts. We can hypothesize that the relatively stable global environmental conditions in the Late Holocene were an auspicious background to see abrupt changes due to influence of the zoogenic and anthropogenic factors. We believe that further works on the material from other islands will make it possible to form a general picture of changes in the diatom communities in the Holocene and interpret it in connection with climatic changes in the region.Alisa A. NeplyukhinaAndrey V. TchabovskyMaria A. GololobovaOlesya I. SmyshlyaevaOlga A. KrylovichArkady B. SavinetskyAlexey A. KotovMDPI AGarticlediatomsdiatom analysisprincipal component analysis (PCA)climate reconstructionAleutian IslandsShemya IslandHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3134, p 3134 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	diatoms diatom analysis principal component analysis (PCA) climate reconstruction Aleutian Islands Shemya Island Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	diatoms diatom analysis principal component analysis (PCA) climate reconstruction Aleutian Islands Shemya Island Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Alisa A. Neplyukhina Andrey V. Tchabovsky Maria A. Gololobova Olesya I. Smyshlyaeva Olga A. Krylovich Arkady B. Savinetsky Alexey A. Kotov The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes
description	A diatom analysis of a peat deposit from Shemya Island (Aleutian Arc, USA) is performed, and the dynamics of the diatom community are described. According to the radiocarbon dating, the formation of the deposit began 9300 cal. years BP. Principal component analysis made it possible to relate the dynamics of the diatom community to certain environmental conditions and the factors that influenced the coastal ecosystems during its formation. The following factors (predictors) were considered: the influence of age, zoo- and anthropogenic effects, and changes in climatic conditions. Sea level change was the main driver of the diatom community in the studied water body having a continuous direct and indirect influence on the studied small water body, i.e., by bird colony formation and more humid and coastal conditions. Since 3000–2000 cal. years BP, the anthropogenic factor (hunting depression of the bird colony) also became significant. During the whole water body lifetime and following peat formation, the diatom community was influenced by groups of factors: global factors (e.g., sea level rise) caused gradual change of local factors, which resulted in smooth shifts in community. In contrast, local factor influence (bird colony rise and fall due to human activity) caused abrupt and transient shifts. We can hypothesize that the relatively stable global environmental conditions in the Late Holocene were an auspicious background to see abrupt changes due to influence of the zoogenic and anthropogenic factors. We believe that further works on the material from other islands will make it possible to form a general picture of changes in the diatom communities in the Holocene and interpret it in connection with climatic changes in the region.
format	article
author	Alisa A. Neplyukhina Andrey V. Tchabovsky Maria A. Gololobova Olesya I. Smyshlyaeva Olga A. Krylovich Arkady B. Savinetsky Alexey A. Kotov
author_facet	Alisa A. Neplyukhina Andrey V. Tchabovsky Maria A. Gololobova Olesya I. Smyshlyaeva Olga A. Krylovich Arkady B. Savinetsky Alexey A. Kotov
author_sort	Alisa A. Neplyukhina
title	The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes
title_short	The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes
title_full	The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes
title_fullStr	The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes
title_full_unstemmed	The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes
title_sort	holocene history of the diatom community in a small water body on shemya island (aleutian arc, usa): the influence of global and local environmental changes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/87a386aadd474205803d701b42432325
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The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes

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