Recent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake

We investigated modern-littoral and subfossil sediment-core diatoms in the shallow (max depth 6.4 m) high-mountain Lake Balma in the Orsiera Rocciavrè Nature Park (Italian Western Alps). Our study provided evidence that might be related to the response of diatom assemblages to fish introduction, in...

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Autores principales:	Marco Cantonati, Raffaella Zorza, Marco Bertoli, Paolo Pastorino, Gianguido Salvi, Giulia Platania, Marino Prearo, Elisabetta Pizzul
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Diatom assemblages Paleolimnology Non-native fish introduction Cattle grazing Environmental change Global warming Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/ec7825cee40b43918db766ce273f5bf1
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spelling	oai:doaj.org-article:ec7825cee40b43918db766ce273f5bf12021-12-01T04:49:12ZRecent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake1470-160X10.1016/j.ecolind.2021.107603https://doaj.org/article/ec7825cee40b43918db766ce273f5bf12021-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21002685https://doaj.org/toc/1470-160XWe investigated modern-littoral and subfossil sediment-core diatoms in the shallow (max depth 6.4 m) high-mountain Lake Balma in the Orsiera Rocciavrè Nature Park (Italian Western Alps). Our study provided evidence that might be related to the response of diatom assemblages to fish introduction, in particular the decreasing of the nutrient-enrichment sensitive low-profile life-form/ecological guild and the increase in species known to react positively to the augmented nutrient availability due to fish excretions (e.g., Fragilaria nanana, Pseudostaurosira brevistriata, Staurosirella neopinnata). We are, however, aware that some of these effects could as well have been caused by pastures and cattle watering, and by increased temperatures due to global warming, and we acknowledge the typical complex-interaction pattern among different stressors. High-mountain lakes are ‘‘early warning systems’’ for the whole alpine system and can contribute valuable information also on the interactions between environmental global changes and anthropogenic impacts. Benthic diatoms, in particular, can provide useful indications on the deleterious effects of non-native fish introduction, cattle grazing, and global warming, and thus support an adaptive and sustainable management of high-mountain lakes for the sake of nature conservation.Marco CantonatiRaffaella ZorzaMarco BertoliPaolo PastorinoGianguido SalviGiulia PlataniaMarino PrearoElisabetta PizzulElsevierarticleDiatom assemblagesPaleolimnologyNon-native fish introductionCattle grazingEnvironmental changeGlobal warmingEcologyQH540-549.5ENEcological Indicators, Vol 125, Iss , Pp 107603- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Diatom assemblages Paleolimnology Non-native fish introduction Cattle grazing Environmental change Global warming Ecology QH540-549.5
spellingShingle	Diatom assemblages Paleolimnology Non-native fish introduction Cattle grazing Environmental change Global warming Ecology QH540-549.5 Marco Cantonati Raffaella Zorza Marco Bertoli Paolo Pastorino Gianguido Salvi Giulia Platania Marino Prearo Elisabetta Pizzul Recent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake
description	We investigated modern-littoral and subfossil sediment-core diatoms in the shallow (max depth 6.4 m) high-mountain Lake Balma in the Orsiera Rocciavrè Nature Park (Italian Western Alps). Our study provided evidence that might be related to the response of diatom assemblages to fish introduction, in particular the decreasing of the nutrient-enrichment sensitive low-profile life-form/ecological guild and the increase in species known to react positively to the augmented nutrient availability due to fish excretions (e.g., Fragilaria nanana, Pseudostaurosira brevistriata, Staurosirella neopinnata). We are, however, aware that some of these effects could as well have been caused by pastures and cattle watering, and by increased temperatures due to global warming, and we acknowledge the typical complex-interaction pattern among different stressors. High-mountain lakes are ‘‘early warning systems’’ for the whole alpine system and can contribute valuable information also on the interactions between environmental global changes and anthropogenic impacts. Benthic diatoms, in particular, can provide useful indications on the deleterious effects of non-native fish introduction, cattle grazing, and global warming, and thus support an adaptive and sustainable management of high-mountain lakes for the sake of nature conservation.
format	article
author	Marco Cantonati Raffaella Zorza Marco Bertoli Paolo Pastorino Gianguido Salvi Giulia Platania Marino Prearo Elisabetta Pizzul
author_facet	Marco Cantonati Raffaella Zorza Marco Bertoli Paolo Pastorino Gianguido Salvi Giulia Platania Marino Prearo Elisabetta Pizzul
author_sort	Marco Cantonati
title	Recent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake
title_short	Recent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake
title_full	Recent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake
title_fullStr	Recent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake
title_full_unstemmed	Recent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake
title_sort	recent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/ec7825cee40b43918db766ce273f5bf1
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Recent and subfossil diatom assemblages as indicators of environmental change (including fish introduction) in a high-mountain lake

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