Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary

Martínez-Soto, Marly Carolina; Basterretxea, Gotzon; Garcés, Esther; Anglès, Silvia; Jordi, Antoni; Tovar-Sánchez, Antonio; Ministerio de Economía y Competitividad (España)

Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary

11 pages, 7 figures, 1 table

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Bibliographic Details
Main Authors:	Martínez-Soto, Marly Carolina, Basterretxea, Gotzon, Garcés, Esther, Anglès, Silvia, Jordi, Antoni, Tovar-Sánchez, Antonio
Other Authors:	Ministerio de Economía y Competitividad (España)
Format:	artículo biblioteca
Language:	English
Published:	Frontiers Media 2015-08-07
Subjects:	Enzyme-labeled ﬂuorescence, alkaline phosphatase activity, phosphorus limitation, nutrient ratios, phytoplankton,
Online Access:	http://hdl.handle.net/10261/122163 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780
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id	dig-icm-es-10261-122163
record_format	koha
spelling	dig-icm-es-10261-1221632022-10-25T12:22:56Z Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary Martínez-Soto, Marly Carolina Basterretxea, Gotzon Garcés, Esther Anglès, Silvia Jordi, Antoni Tovar-Sánchez, Antonio Ministerio de Economía y Competitividad (España) European Commission Enzyme-labeled ﬂuorescence alkaline phosphatase activity phosphorus limitation nutrient ratios phytoplankton 11 pages, 7 figures, 1 table We investigated the species-specific phosphorus (P) nutritional strategies in the microphytoplankton community in the Mahon estuary (Minorca, Western Mediterranean) in 2011, under two contrasting hydrographic scenarios. Estuarine flow, nutrient concentrations, phytoplankton community composition, and enzyme-labeled fluorescence (ELF) were measured in June and October, corresponding to the beginning and the end of summer. Dissolved inorganic nitrogen (DIN) and inorganic phosphate (Pi) exhibited enhanced concentrations in the inner estuary where N:P molar ratios suggested P-limitation in both surveys. Pi was low and variable (0.09 ± 0.02 μmol L−1 in June and 0.06 ± 0.02 μmol L−1 in October), whereas organic phosphorus remained a more readily available P source. Even though ambient Pi concentrations were slightly higher on June, when the microphytoplankton assemblage was dominated by dinoflagellates, the percentage of ELF labeled cells was notably higher (65 ± 9% of total cells) than in October (12 ± 10%), when the presence of diatoms characterized the microphytoplankton community. Alkaline phosphatase activity (AP) was mainly expressed by dinoflagellate taxa, whereas diatoms only displayed significant AP in the inner estuary during the June survey. A P-addition bioassay in which response of AP to Pi enrichment was evaluated showed marked reduction in AP with increasing Pi. However, some dinoflagellate species maintained AP even when Pi was supplied in excess. We suggest that in the case of some dinoflagellate species AP is not as tightly controlled by ambient Pi as previously believed. AP activity in these species could indicate selective use of organic phosphorus, or slow metabolic response to changes in P forms, rather than physiological stress to low Pi availability. We emphasize the importance of identifying the species specific phosphorus requirements and their capability for P assimilation in order to understand the contribution of microphytoplankton to the whole community response to biogeochemical perturbations This work was ﬁnanced by the Ministerio de Economía y Competitividad (MINECO) grants EHRE (CTM2009-08270) and GRADIENTS (CTM2012-39476-C02-01). MM work was funded by a JAE-doc contract from the Spanish Ministry of Economy and Competitiveness. SA was supported by a Marie Curie International Outgoing Fellowship within the 7th European Community Framework Programme (GA-302562), and AJ by a Ramón y Cajal contract from the Spanish Ministry of Economy and Competitiveness Peer reviewed 2015-09-16T09:38:57Z 2015-09-16T09:38:57Z 2015-08-07 artículo http://purl.org/coar/resource_type/c_6501 Frontiers in Marine Science 2: 54 (2015) http://hdl.handle.net/10261/122163 10.3389/fmars.2015.00054 2296-7745 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/302562 Publisher's version http://dx.doi.org/10.3389/fmars.2015.00054 Sí open Frontiers Media
institution	ICM ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-icm-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del ICM España
language	English
topic	Enzyme-labeled ﬂuorescence alkaline phosphatase activity phosphorus limitation nutrient ratios phytoplankton Enzyme-labeled ﬂuorescence alkaline phosphatase activity phosphorus limitation nutrient ratios phytoplankton
spellingShingle	Enzyme-labeled ﬂuorescence alkaline phosphatase activity phosphorus limitation nutrient ratios phytoplankton Enzyme-labeled ﬂuorescence alkaline phosphatase activity phosphorus limitation nutrient ratios phytoplankton Martínez-Soto, Marly Carolina Basterretxea, Gotzon Garcés, Esther Anglès, Silvia Jordi, Antoni Tovar-Sánchez, Antonio Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary
description	11 pages, 7 figures, 1 table
author2	Ministerio de Economía y Competitividad (España)
author_facet	Ministerio de Economía y Competitividad (España) Martínez-Soto, Marly Carolina Basterretxea, Gotzon Garcés, Esther Anglès, Silvia Jordi, Antoni Tovar-Sánchez, Antonio
format	artículo
topic_facet	Enzyme-labeled ﬂuorescence alkaline phosphatase activity phosphorus limitation nutrient ratios phytoplankton
author	Martínez-Soto, Marly Carolina Basterretxea, Gotzon Garcés, Esther Anglès, Silvia Jordi, Antoni Tovar-Sánchez, Antonio
author_sort	Martínez-Soto, Marly Carolina
title	Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary
title_short	Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary
title_full	Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary
title_fullStr	Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary
title_full_unstemmed	Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary
title_sort	species-specific variation in the phosphorus nutritional sources by microphytoplankton in a mediterranean estuary
publisher	Frontiers Media
publishDate	2015-08-07
url	http://hdl.handle.net/10261/122163 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780
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Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary

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