Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition

Abstract The study estimates the parameters of the photosynthesis–irradiance relationship (PN/I) of a sedge-grass marsh (Czech Republic, Europe), represented as an active “green” surface—a hypothetical “big-leaf”. Photosynthetic parameters of the “big-leaf” are based on in situ measurements of the l...

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Autores principales:	Markéta Mejdová, Jiří Dušek, Lenka Foltýnová, Lenka Macálková, Hana Čížková
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c348c0785a2a43bcbe70a36428729a22
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spelling	oai:doaj.org-article:c348c0785a2a43bcbe70a36428729a222021-12-02T14:11:32ZPhotosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition10.1038/s41598-021-82382-22045-2322https://doaj.org/article/c348c0785a2a43bcbe70a36428729a222021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82382-2https://doaj.org/toc/2045-2322Abstract The study estimates the parameters of the photosynthesis–irradiance relationship (PN/I) of a sedge-grass marsh (Czech Republic, Europe), represented as an active “green” surface—a hypothetical “big-leaf”. Photosynthetic parameters of the “big-leaf” are based on in situ measurements of the leaf PN/I curves of the dominant plant species. The non-rectangular hyperbola was selected as the best model for fitting the PN/I relationships. The plant species had different parameters of this relationship. The highest light-saturated rate of photosynthesis (Asat) was recorded for Glyceria maxima and Acorus calamus followed by Carex acuta and Phalaris arundinacea. The lowest Asat was recorded for Calamagrostis canescens. The parameters of the PN/I relationship were calculated also for different growth periods. The highest Asat was calculated for the spring period followed by the summer and autumn periods. The effect of the species composition of the local plant community on the photosynthetic parameters of the “big-leaf” was addressed by introducing both real (recorded) and hypothetical species compositions corresponding to “wet” and “dry” hydrological conditions. We can conclude that the species composition (or diversity) is essential for reaching a high Asat of the “big-leaf ”representing the sedge-grass marsh in different growth periods.Markéta MejdováJiří DušekLenka FoltýnováLenka MacálkováHana ČížkováNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Markéta Mejdová Jiří Dušek Lenka Foltýnová Lenka Macálková Hana Čížková Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition
description	Abstract The study estimates the parameters of the photosynthesis–irradiance relationship (PN/I) of a sedge-grass marsh (Czech Republic, Europe), represented as an active “green” surface—a hypothetical “big-leaf”. Photosynthetic parameters of the “big-leaf” are based on in situ measurements of the leaf PN/I curves of the dominant plant species. The non-rectangular hyperbola was selected as the best model for fitting the PN/I relationships. The plant species had different parameters of this relationship. The highest light-saturated rate of photosynthesis (Asat) was recorded for Glyceria maxima and Acorus calamus followed by Carex acuta and Phalaris arundinacea. The lowest Asat was recorded for Calamagrostis canescens. The parameters of the PN/I relationship were calculated also for different growth periods. The highest Asat was calculated for the spring period followed by the summer and autumn periods. The effect of the species composition of the local plant community on the photosynthetic parameters of the “big-leaf” was addressed by introducing both real (recorded) and hypothetical species compositions corresponding to “wet” and “dry” hydrological conditions. We can conclude that the species composition (or diversity) is essential for reaching a high Asat of the “big-leaf ”representing the sedge-grass marsh in different growth periods.
format	article
author	Markéta Mejdová Jiří Dušek Lenka Foltýnová Lenka Macálková Hana Čížková
author_facet	Markéta Mejdová Jiří Dušek Lenka Foltýnová Lenka Macálková Hana Čížková
author_sort	Markéta Mejdová
title	Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition
title_short	Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition
title_full	Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition
title_fullStr	Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition
title_full_unstemmed	Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition
title_sort	photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c348c0785a2a43bcbe70a36428729a22
work_keys_str_mv	AT marketamejdova photosyntheticparametersofasedgegrassmarshasabigleafeffectofplantspeciescomposition AT jiridusek photosyntheticparametersofasedgegrassmarshasabigleafeffectofplantspeciescomposition AT lenkafoltynova photosyntheticparametersofasedgegrassmarshasabigleafeffectofplantspeciescomposition AT lenkamacalkova photosyntheticparametersofasedgegrassmarshasabigleafeffectofplantspeciescomposition AT hanacizkova photosyntheticparametersofasedgegrassmarshasabigleafeffectofplantspeciescomposition
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Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition

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