Dynamics of surface elevation and microtopography in different zones of a coastal Phragmites wetland

Karstens, Svenja; Jurasinski, Gerald; Glatzel, Stephan; Buczko, Uwe

doi:10.1016/j.ecoleng.2016.05.049

Cited by 22 publications

(12 citation statements)

References 47 publications

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“…, in an effort to quantify marsh surface breakup (Karstens et al, 2016;Moser et al, 2007). As an additional metric of microheterogeneity, we quantified the number of holes, defined as locations with an elevation difference between that exceeded 20 mm.…”

Section: Elevation Trendsmentioning

confidence: 99%

Temperature optimum for marsh resilience and carbon accumulation revealed in a whole‐ecosystem warming experiment

Smith

Noyce

Megonigal

et al. 2022

Global Change Biology

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Coastal marshes are globally important, carbon dense ecosystems simultaneously maintained and threatened by sea‐level rise. Warming temperatures may increase wetland plant productivity and organic matter accumulation, but temperature‐modulated feedbacks between productivity and decomposition make it difficult to assess how wetlands and their thick, organic‐rich soils will respond to climate warming. Here, we actively increased aboveground plant‐surface and belowground soil temperatures in two marsh plant communities, and found that a moderate amount of warming (1.7°C above ambient temperatures) consistently maximized root growth, marsh elevation gain, and belowground carbon accumulation. Marsh elevation loss observed at higher temperatures was associated with increased carbon mineralization and increased microtopographic heterogeneity, a potential early warning signal of marsh drowning. Maximized elevation and belowground carbon accumulation for moderate warming scenarios uniquely suggest linkages between metabolic theory of individuals and landscape‐scale ecosystem resilience and function, but our work indicates nonpermanent benefits as global temperatures continue to rise.

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Section: Elevation Trendsmentioning

confidence: 99%

Temperature optimum for marsh resilience and carbon accumulation revealed in a whole‐ecosystem warming experiment

Smith

Noyce

Megonigal

et al. 2022

Global Change Biology

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“…They showed that the observed differences could be explained by wind disturbance in lentic sites and by the water regime disturbance in lotic habitats. However, P. australis is an "ecosystem engineer species" par excellence, and its dense stands play an essential role as a wind and wave breaker (Takeda and Kurihara 1988;Vymazal 2011;Karstens et al, 2016). Therefore, the same high level of reeds coverage may have buffered different abiotic factors and led to similar levels of functional diversity across habitats.…”

Section: Discussionmentioning

confidence: 99%

The incidence of alien species on the taxonomic, phylogenetic, and functional diversity of lentic and lotic communities dominated byPhragmites australis(Cav.) Steud

Castellani

Lastrucci

Lazzaro

et al. 2022

Knowl. Manag. Aquat. Ecosyst.

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This study aims to investigate, for the first time, the multiple diversity harbored in plant communities dominated by P. australis, discriminating between lentic and lotic habitats. We focused on the incidence of alien species on taxonomical, phylogenetic and functional diversity. Although it was hypothesized that ecological differences between habitats (lentic vs. lotic) could lead to plant adaptive trade-offs, results showed that the P. australis dominance affected overall plant diversity in the same way in both target habitats. Similarly, the two compared habitats hosted a similar alien species richness and relative abundance. Different results were observed based on whether the alien species richness or their relative abundance were considered regarding the incidence of alien species. Increasing alien species richness in lentic habitats resulted in increased taxonomic, phylogenetic and functional diversity. Instead, in lotic habitats, it promoted a decrease in taxonomic and functional diversity. In contrast, the increase in the relative abundance of alien species resulted in increased taxonomic, phylogenetic and functional diversity in both habitats. Choosing relative abundance vs richness of aliens in lotic stands can have a different impact in evaluating the effect of aliens on various components of diversity.

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“…Known as a high-precision and high-resolution mapping tool, the terrestrial LiDAR system provides a rapid and practical approach to map coastal micro-topography, which has a considerable influence on the hydrology, the habitat variability including vegetation patterns, and the functioning of ecosystems [27][28][29]. However, high uncertainty under dense vegetation remains a significant challenge due to the inability of laser signals to penetrate tall and dense vegetation [30]. Coveney and Fotheringham (2011) [31] explored the terrestrial laser scan error in the presence of dense ground vegetation and clarified the component contributions to elevation error deriving from vegetation occlusion, scan coregistration errors, point-cloud geo-referencing errors and target position definition.…”

Section: Introductionmentioning

confidence: 99%

Micro-Topography Mapping through Terrestrial LiDAR in Densely Vegetated Coastal Environments

Zhang

Meng

et al. 2021

IJGI

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Terrestrial Light Detection And Ranging (LiDAR), also referred to as terrestrial laser scanning (TLS), has gained increasing popularity in terms of providing highly detailed micro-topography with millimetric measurement precision and accuracy. However, accurately depicting terrain under dense vegetation remains a challenge due to the blocking of signal and the lack of nearby ground. Without dependence on historical data, this research proposes a novel and rapid solution to map densely vegetated coastal environments by integrating terrestrial LiDAR with GPS surveys. To verify and improve the application of terrestrial LiDAR in coastal dense-vegetation areas, we set up eleven scans of terrestrial LiDAR in October 2015 along a sand berm with vegetation planted in Plaquemines Parish of Louisiana. At the same time, 2634 GPS points were collected for the accuracy assessment of terrain mapping and terrain correction. Object-oriented classification was applied to classify the whole berm into tall vegetation, low vegetation and bare ground, with an overall accuracy of 92.7% and a kappa value of 0.89. Based on the classification results, terrain correction was conducted for the tall-vegetation and low-vegetation areas, respectively. An adaptive correction factor was applied to the tall-vegetation area, and the 95th percentile error was calculated as the correction factor from the surface model instead of the terrain model for the low-vegetation area. The terrain correction method successfully reduced the mean error from 0.407 m to −0.068 m (RMSE errors from 0.425 m to 0.146 m) in low vegetation and from 0.993 m to −0.098 m (RMSE from 1.070 m to 0.144 m) in tall vegetation.

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Dynamics of surface elevation and microtopography in different zones of a coastal Phragmites wetland

Cited by 22 publications

References 47 publications

Temperature optimum for marsh resilience and carbon accumulation revealed in a whole‐ecosystem warming experiment

Temperature optimum for marsh resilience and carbon accumulation revealed in a whole‐ecosystem warming experiment

The incidence of alien species on the taxonomic, phylogenetic, and functional diversity of lentic and lotic communities dominated byPhragmites australis(Cav.) Steud

Micro-Topography Mapping through Terrestrial LiDAR in Densely Vegetated Coastal Environments

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