Seasonal dynamics of biomass partitioning in a tall sedge, Carex acuta L.

Honissová, Markéta; Hovorka, František; Kuncová, Štìpánka; Moulisová, Lenka; Vítková, Jitka; Plsová, Marcela; Čižek, Jan; Čı́žková, Hana

doi:10.1016/j.aquabot.2015.05.005

Cited by 4 publications

(1 citation statement)

References 27 publications

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“…Accompanying species usually colonize hummock edges and extend down into the hollows only during dry years. C. canescens spreads on tops of the hummocks in dry years and thus forms an important part of the C. acuta –dominated plant community 24 . The other species include Glyceria maxima and Acorus calamus , which occur either together with C. acuta or form monodominant stands.…”

Section: Methodsmentioning

confidence: 99%

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

Mejdová

Dusek

Foltýnová

et al. 2021

Sci Rep

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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.

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Section: Methodsmentioning

confidence: 99%

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

Mejdová

Dusek

Foltýnová

et al. 2021

Sci Rep

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Addressing Effects of Environment on Eddy-Covariance Flux Estimates at a Temperate Sedge-Grass Marsh

Kivalov

Dusek

Czerný

et al. 2023

Boundary-Layer Meteorol

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We examined the net-ecosystem-exchange (NEE)-based annual carbon-balance estimates obtained from eddy-covariance (EC) measurements at an unmanaged sedge-grass marsh ecosystem (Třeboň, Czech Republic, 49°1′ N, 14°46′ E), seeking methods to improve the EC measurements in inhomogeneous environment. The data filtering procedure was developed using three thresholds: (a) a stationarity test; (b) a stability $${u}_{*}$$ u ∗ -threshold; and (c) a high relative humidity RH-threshold. This procedure was tested in 2014, a year without significant floods and drought events led to a stable water table, reducing the effect of soil respiration on the EC measurements. Estimates of annual carbon-balance were reduced from 182 to 234 ± 12 gC m−2 year−1 for the initial data to 39–44 ± 8 gC m−2 year−1 after the $$RH$$ RH ≤ 95% filtering and to 24–26 ± 7 gC m−2 year−1 after the further $${u}_{*}$$ u ∗ ≥ 0.1 m s−1 filtering. Applying the precipitation/fog threshold reduced this balance to 10–12 ± 7 gC m−2 year−1, closer to carbon neutrality. Up to 9.5% of this identified shift occurred during apparent nocturnal downslope katabatic drainage flows or plume descent coming from the nearby town of Třeboň. High-RH conditions account for up to 27% of this shift. Moreover, both conditions together account for an additional 67% of the identified carbon-balance change. Removing these non-ecosystem-related processes brings EC measurements closer to values of an unmanaged-ecosystem productivity, providing a better NEE-based estimate for the net ecosystem production. The presented procedure is applicable to EC measurements conducted at different wetlands or terrestrial ecosystems with similar conditions.

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Effect of Hummock-Forming Vegetation on Methane Emissions from a Temperate Sedge-Grass Marsh

et al. 2017

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Seasonal dynamics of biomass partitioning in a tall sedge, Carex acuta L.

Cited by 4 publications

References 27 publications

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

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

Addressing Effects of Environment on Eddy-Covariance Flux Estimates at a Temperate Sedge-Grass Marsh

Effect of Hummock-Forming Vegetation on Methane Emissions from a Temperate Sedge-Grass Marsh

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