Zonation of emergent freshwater macrophytes: Responses to small-scale variation in water depth

Roznere, Ieva; Titus, John E.

doi:10.3159/torrey-d-16-00017.1

Cited by 8 publications

(2 citation statements)

References 50 publications

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“…Carex was dominant along the higher edges of the depressional wetland while Panicum was found in deeper water less likely of drawdown (Figure 1). Persicaria hydropiperoides (FORB), prefers water depth 0-20 cm (Roznere & Titus, 2017), and submerged aquatic vegetation needs a minimum water depth to be erect. However, many variables were better explained by variations in plant physiology and function than water depth.…”

Section: Patch Differencesmentioning

confidence: 99%

Net Methane Production Predicted by Patch Characteristics in a Freshwater Wetland

Sharp,

Maietta,

Stewart

et al. 2023

JGR Biogeosciences

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Methane (CH4) dynamics in wetlands are spatially variable and difficult to estimate at ecosystem scales. Patches with different plant functional types (PFT) represent discrete units within wetlands that may help characterize patterns in CH4 variability. We investigate dissolved porewater CH4 concentrations, a representation of net CH4 production and potential source of atmospheric flux, in five wetland patches characterized by a dominant PFT or lack of plants. Using soil, porewater, and plant variables we hypothesized to influence CH4, we used three modeling approaches—Classification and regression tree, AIC model selection, and Structural Equation Modeling—to identify direct and indirect influences on porewater CH4 dynamics. Across all three models, dissolved porewater CO2 concentration was the dominant driver of CH4 concentrations, partly through the influence of PFT patches. Plants in each patch type likely had variable influence on CH4 via root exudates (a substrate for methanogens), capacity to transport gas (both O2 from and CH4 to the atmosphere), and plant litter quality which impacted soil respiration and production of CO2 in the porewater. We attribute the importance of CO2 to the dominant methanogenic pathway we identified, which uses CO2 as a terminal electron acceptor. We propose a mechanistic relationship between PFT patches and porewater CH4 dynamics which, when combined with sources of CH4 loss including methanotrophy, oxidation, or plant‐mediated transport, can provide patch‐scale estimates of CH4 flux. Combining these estimates with the distribution of PFTs can improve ecosystem CH4 flux estimates in heterogenous wetlands and improve global CH4 budgets.

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Section: Patch Differencesmentioning

confidence: 99%

Net Methane Production Predicted by Patch Characteristics in a Freshwater Wetland

Sharp,

Maietta,

Stewart

et al. 2023

JGR Biogeosciences

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show abstract

“…occupying the deeper part of the river creek. It can be said that less interspecific competition will be occurred between the macrophyte community within the same habitat due to different habitat zonation (Roznere & Titus, 2017;de Assis Murillo et al, 2019). So, station 7 was having a diverse population but less macrophytes coverage due to higher disturbance and lacking nutrient input.…”

Section: Population Estimationmentioning

confidence: 99%

Morphological Characterisation and Documentation of Freshwater Macrophytes in Pontian, Johor's Water

ONG

TENG

2022

BJRST

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Freshwater macrophytes exist in varied life forms for example, emergent, submerged, floating-leaved and free-floating, and some of them have a heterophylly or multiple forms. The intraspecific variation in terms of morphology is common phenomena in macrophytes population; however, specific studies on morphology of freshwater macrophytes are still insufficient, especially in Pontian, Johor. Hence, this study aimed to characterise the freshwater macrophytes based on morphometrics and descriptive characteristics as well as to document their diversity and population. Thus, the morphometric measurements were done, the descriptive characteristics were documented in scientific photographs, the population of freshwater macrophytes was also estimated by using quadrat estimation technique. Additionally, the morphometrics of some collected samples were compared with the same sample in other studies to show the variation in the range of different measurements, the descriptive characteristics were also described as well as the population estimation assessed by area coverage was analysed in the form of statistical chart. The finding in this study showed variation in morphometric data and no intraspecific variation on phenotype of freshwater macrophytes in Pontian, Johor’s water.

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Beavers in lakes: a review of their ecosystem impact

Bashinskiy

2020

Aquat Ecol

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Zonation of emergent freshwater macrophytes: Responses to small-scale variation in water depth

Cited by 8 publications

References 50 publications

Net Methane Production Predicted by Patch Characteristics in a Freshwater Wetland

Net Methane Production Predicted by Patch Characteristics in a Freshwater Wetland

Morphological Characterisation and Documentation of Freshwater Macrophytes in Pontian, Johor's Water

Beavers in lakes: a review of their ecosystem impact

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