Modelling mangrove forest structure and species composition over tidal inundation gradients: The feedback between plant water use and porewater salinity in an arid mangrove ecosystem

Bathmann, Jasper; Peters, Ronny; Reef, Ruth; Berger, Uta; Walther, Marc; Lovelock, Catherine E.

doi:10.1016/j.agrformet.2021.108547

Cited by 11 publications

(4 citation statements)

References 47 publications

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“…Previous studies also identified the domination of B. gymnorrhiza in the middle zone of mangrove forests (Urashi et al 2013;Kamruzzaman et al 2016). The middle zone had a lower salinity than the seaward area due to the balance of freshwater input from the upper land area and saltwater from tidal flow (Bathmann et al 2021). Environmental condition in this area was the most preferred habitat for mangroves and led to a higher diversity of mangrove species (Ragavan et al 2015).…”

Section: Mangrove Community Structurementioning

confidence: 84%

Mangrove zonation, community structure and healthiness in Kei Islands, Maluku, Indonesia

Dharmawan¹,

RENYAAN²,

NURDIANSAH³

2022

Biodiversitas

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Abstract. Dharmawan IWE, Renyaan J, Nurdiansah D. 2022. Mangrove zonation, community structure and healthiness in Kei Islands, Maluku, Indonesia. Biodiversitas 23: 4918-4927. Forest structure and quality were studied in an archipelagic site in Indonesia which consists of estuarine and oceanic mangrove habitats. This study aimed to determine mangrove structure and estimate the spatial distribution of forest healthiness along the zones dominated by different genera. Forest zones were investigated using the Random Forest method utilizing a cloud-free Harmonized Sentinel-2A-Surface Reflectance image. Community structure measurement followed a stratified purposive sampling design along forest zonation. A spatial-based mangrove health index (MHI) model was applied to analyze forest healthiness distribution in each zone. Mangrove area was clearly classified into six genera-dominated zones such as Sonneratia, Rhizophora, Bruguiera, Ceriops, Xylocarpus and Lumnitzera from seaward to landward. The Rhizophora zone had the most extensive area proportion at approximately 68% of the total mangrove area. This study revealed that S. alba species dominated in the outmost zone at about 200% of IVI, while X. granatum and C. tagal were calculated in a larger IVI value in the more landward area. On the other hand, R. stylosa had a majority species composition in Rhizophora forest. According to spatial analysis of MHI, most zones had a majority area of excellent condition, emphasizing that the entire mangrove forest was pristine.

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Section: Mangrove Community Structurementioning

confidence: 84%

Mangrove zonation, community structure and healthiness in Kei Islands, Maluku, Indonesia

Dharmawan¹,

RENYAAN²,

NURDIANSAH³

2022

Biodiversitas

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“…The new modeling frameworks focus on the prediction and development of heterogeneous natural systems. Examples of this trend include investigations of regime shifts and distribution patterns (Bathmann et al, 2021; Jiang et al, 2012; Peters et al, 2020). However, such modelling faces data challenges including sampling collection strategies, characterization of species distribution, structure, and variations in topography.…”

Section: Practices For Tree Species Diversity Monitoring and Predictionsmentioning

confidence: 99%

Section: Linking Spatial Scale Tree Species Models With Remote Sensingmentioning

confidence: 99%

Enhancing monitoring of mangrove spatiotemporal tree diversity and distribution patterns

Pimple

Simonetti²,

Peters

et al. 2022

Land Degrad Dev

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Spatiotemporal information on mangrove species assemblage of natural, disturbed, and rehabilitated is an essential prerequisite for effective strategies for biodiversity conservation and management. However, appropriate field‐based sampling strategies of spatial heterogeneity still hamper the detection of the species distribution and its temporal development. An increasing amount of remote sensing data seems the perfect way to tackle these challenges. With this article, we fill this gap by presenting a review of the challenges and limitations to assess the current status of species diversity. We conclude that species discrimination based on remote sensing techniques is still limited by atmospheric contamination and tidal fluctuations. The lack of accurate information on the spatiotemporal development of species diversity and forest structure further curtails an understanding of functional indicators and the predictive power of modeling approaches. Nevertheless, multi‐source remote‐sensing techniques could seemingly capture the landscape heterogeneity and support systematic sampling designs. Spatially balanced (systematic) training and validation data are necessary to compile robust spatiotemporal information, supporting reliable predictions for optimizing restoration efforts. A systematic sampling of spatiotemporal ecological information is vital to derive the historical state of mangroves, detecting their degradation, and predicting future patterns of species distribution that are generally crucial for restoration, and particularly to rehabilitate species diversity.

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“…At the same time, salinity is a primary hydrological driver, known to reduce soil water potential, limit root water uptake, increase the risk of xylem cavitation, and impair photosynthesis (Munns, 2002; Perri et al, 2019, 2022; Perri, Entekhabi, & Molini, 2018). A number of studies on mangrove biomass stocks and allometric relations have suggested that aridity and tidal inundation frequency, all‐controlling water salinity, are dominant limiting factors for coastal ecosystems' carbon storage (Adame et al, 2020; Bathmann et al, 2021; Gauthey et al, 2022; Rovai et al, 2021). These effects are analogous to those of water stress in terrestrial forests, and similarly to water stress, they could exert significant controls on species competition and canopy height (Klein et al, 2015; Koch et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Salinity‐induced limits to mangrove canopy height

Perri

Detto

Porporato

et al. 2023

Global Ecol Biogeogr

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AimMangrove canopy height is a key metric to assess tidal forests' resilience in the face of climate change. In terrestrial forests, tree height is primarily determined by water availability, plant hydraulic design, and disturbance regime. However, the role of water stress remains elusive in tidal environments, where saturated soils are prevalent, and salinity can substantially affect the soil water potential.LocationGlobal.Time PeriodThe canopy height dataset provides a global snapshot of the maximum mangrove height geographical distribution for the year 2000. Climate and environmental variables extend over the period 1970–2018.Major Taxa StudiedMangroves.MethodsWe use global observations of maximum canopy height, species richness, air temperature, and seawater salinity—a proxy of soil water salt concentration—to explore the causal link between salinity and mangrove stature.ResultsOur findings suggest that salt stress limits mangrove height. High salinity favours more salt‐tolerant species, narrowing the spectrum of viable traits. Highly salt‐tolerant mangroves have evolved to cope with high salt concentrations in the soil, but this adaptation comes at a cost. They typically have lower rates of photosynthesis and growth, resulting in reduced productivity and smaller stature compared to more salt‐sensitive mangrove species. This suggests a causal link between salinity, biodiversity, and tree height, where high salinity selects for more salt‐tolerant species that tend to be less productive and shorter.ConclusionsWe hypothesize that the salinity‐induced limit to mangrove canopy height is the direct result of a reduction of primary productivity, an increment in the risk of xylem cavitation, and an indirect consequence of the decrease in biodiversity. As sea‐level rise enhances coastal salinisation, failure to account for these effects can lead to incorrect estimates of future carbon stocks in Tropical coastal ecosystems and endanger preservation efforts.

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Modelling mangrove forest structure and species composition over tidal inundation gradients: The feedback between plant water use and porewater salinity in an arid mangrove ecosystem

Cited by 11 publications

References 47 publications

Mangrove zonation, community structure and healthiness in Kei Islands, Maluku, Indonesia

Mangrove zonation, community structure and healthiness in Kei Islands, Maluku, Indonesia

Enhancing monitoring of mangrove spatiotemporal tree diversity and distribution patterns

Salinity‐induced limits to mangrove canopy height

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