Carbon and nitrogen pools and mobile fractions in surface soils across a mangrove saltmarsh ecotone

Lewis, David B.; Jimenez, Kristine L.; Abd-Elrahman, Amr; Andreu, Michael G.; Landry, Shawn M.; Northrop, Robert J.; Campbell, Cassandra; Flower, Hilary; Rains, Mark C.; Richards, Christina L.

doi:10.1016/j.scitotenv.2021.149328

Cited by 18 publications

(8 citation statements)

References 102 publications

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“…In addition, we know very little about the interactions with the microbiome in the species, but microbes have been highlighted as important symbionts in these and other challenging environments (Bowen et al, 2017; Angermeyer et al, 2018; Jung et al, 2021). Soil microbial activity could have dramatic impacts on the future nutrient availability and stability of these coastal sediments (Deegan et al, 2012; Bowen et al, 2017; Hughes et al, 2020; Lewis et al, 2021). In fact, a recent study suggested that bacterial community composition differed among R. mangle maternal genotypes but not with genetic diversity (Craig et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…While coastal eutrophication may enhance growth of foundation species, nutrient enrichment studies report a range of impacts on coastal systems depending on the local conditions (Anisfeld and Hill, 2012; Kirwan and Megonigal, 2013). Local sediment characteristics, soil nutrients, microbial processes, and shifts in allocation of the plant species can impact future nutrient cycling and marsh stability (McKee et al, 2007; Turner, 2011; Deegan et al, 2012; Lewis et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Response to nitrogen and salinity in Rhizophora mangle propagules varies by maternal family and population of origin

Richards

Langanke²,

Mounger³

et al. 2021

Preprint

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Many coastal foundation plant species thrive across a range of environmental conditions, often displaying dramatic phenotypic variation in response to environmental variation. We characterized the response of propagules from six populations of the foundation species Rhizophora mangle L. to full factorial combinations of two levels of salt (15 ppt and 45 ppt) reflecting the range of salinity measured in the field populations, and two levels of nitrogen (N; no addition and amended at approximately 3 mg N per pot each week) equivalent to comparing ambient N to a rate of addition of 75 kg per hectare per year. The response to increasing salt included significant plasticity in succulence. Propagules also showed plasticity in maximum photosynthetic rate in response to N amendment, but the responses depended on the level of salt and varied by population of origin. Generally, survival was lower in high salt and high N, but the impact varied among populations. Overall, this study revealed significant phenotypic plasticity in response to salt and N level. Propagules from different populations differed in all traits measured. Variation in phenotypic plasticity and propagule survival in R. mangle may contribute to adaptation to a complex mosaic of environmental conditions and response to climate change.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Response to nitrogen and salinity in Rhizophora mangle propagules varies by maternal family and population of origin

Richards

Langanke²,

Mounger³

et al. 2021

Preprint

Self Cite

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“…Thus, instead of being linked directly to aboveground biomass, mangrove‐triggered changes in coastal wetland soil properties and soil carbon burial rates, where present, are more likely linked to changes in other processes (e.g., productivity, decomposition). Moreover, where mangrove expansion is occurring across a salinity or elevation gradient (e.g., Krauss et al, 2011; Lewis et al, 2021; Ross et al, 2000), the effects of mangrove expansion may be due to concomitantly changing abiotic conditions that are governed by other drivers (e.g., saltwater intrusion, rising sea levels).…”

Section: Carbon Sequestrationmentioning

confidence: 99%

The impacts of mangrove range expansion on wetland ecosystem services in the southeastern United States: Current understanding, knowledge gaps, and emerging research needs

Osland

Hughes

Armitage

et al. 2022

Global Change Biology

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Climate change is transforming ecosystems and affecting ecosystem goods and services. Along the Gulf of Mexico and Atlantic coasts of the southeastern United States, the frequency and intensity of extreme freeze events greatly influence whether coastal wetlands are dominated by freeze‐sensitive woody plants (mangrove forests) or freeze‐tolerant grass‐like plants (salt marshes). In response to warming winters, mangroves have been expanding and displacing salt marshes at varying degrees of severity in parts of north Florida, Louisiana, and Texas. As winter warming accelerates, mangrove range expansion is expected to increasingly modify wetland ecosystem structure and function. Because there are differences in the ecological and societal benefits that salt marshes and mangroves provide, coastal environmental managers are challenged to anticipate the effects of mangrove expansion on critical wetland ecosystem services, including those related to carbon sequestration, wildlife habitat, storm protection, erosion reduction, water purification, fisheries support, and recreation. Mangrove range expansion may also affect wetland stability in the face of extreme climatic events and rising sea levels. Here, we review the current understanding of the effects of mangrove range expansion and displacement of salt marshes on wetland ecosystem services in the southeastern United States. We also identify critical knowledge gaps and emerging research needs regarding the ecological and societal implications of salt marsh displacement by expanding mangrove forests. One consistent theme throughout our review is that there are ecological trade‐offs for consideration by coastal managers. Mangrove expansion and marsh displacement can produce beneficial changes in some ecosystem services, while simultaneously producing detrimental changes in other services. Thus, there can be local‐scale differences in perceptions of the impacts of mangrove expansion into salt marshes. For very specific local reasons, some individuals may see mangrove expansion as a positive change to be embraced, while others may see mangrove expansion as a negative change to be constrained.

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“…In addition, we know very little about the interactions with the microbiome in the species, but microbes have been highlighted as important symbionts in these and other challenging environments (Bowen et al, 2017;Angermeyer et al, 2018;Jung et al, 2021). Soil microbial activity could have dramatic impacts on the future nutrient availability and stability of these coastal sediments (Deegan et al, 2012;Bowen et al, 2017;Hughes et al, 2020;Lewis et al, 2021). In fact, a recent study suggested that bacterial community composition differed among R. mangle maternal genotypes but not with genetic diversity (Craig et al, 2020).…”

Section: Variation Within and Among Sitesmentioning

confidence: 99%

“…While coastal eutrophication may enhance growth of foundation species, nutrient enrichment studies have reported a range of impacts on coastal systems depending on the local conditions (Anisfeld and Hill, 2012;Kirwan and Megonigal, 2013). For example, nutrient cycling and marsh stability were affected by local sediment characteristics, soil nutrients, microbial processes, and shifts in allocation of the plant species (McKee et al, 2007;Turner, 2011;Deegan et al, 2012;Lewis et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Trait Response to Nitrogen and Salinity in Rhizophora mangle Propagules and Variation by Maternal Family and Population of Origin

et al. 2021

Self Cite

View full text Add to dashboard Cite

Many coastal foundation plant species thrive across a range of environmental conditions, often displaying dramatic phenotypic variation in response to environmental variation. We characterized the response of propagules from six populations of the foundation species Rhizophora mangle L. to full factorial combinations of two levels of salinity (15 ppt and 45 ppt) reflecting the range of salinity measured in the field populations, and two levels of nitrogen (N; no addition and amended at approximately 3 mg N per pot each week) equivalent to comparing ambient N to a rate of addition of 75 kg per hectare per year. The response to increasing salinity included significant changes, i.e., phenotypic plasticity, in succulence and root to shoot biomass allocation. Propagules also showed plasticity in maximum photosynthetic rate and root to shoot allocation in response to N amendment, but the responses depended on the level of salinity and varied by population of origin. In addition, propagules from different populations and maternal families within populations differed in survival and all traits measured except photosynthesis. Variation in phenotypes, phenotypic plasticity and propagule survival within and among R. mangle populations may contribute to adaptation to a complex mosaic of environmental conditions and response to climate change.

show abstract

Carbon and nitrogen pools and mobile fractions in surface soils across a mangrove saltmarsh ecotone

Cited by 18 publications

References 102 publications

Response to nitrogen and salinity in Rhizophora mangle propagules varies by maternal family and population of origin

Response to nitrogen and salinity in Rhizophora mangle propagules varies by maternal family and population of origin

The impacts of mangrove range expansion on wetland ecosystem services in the southeastern United States: Current understanding, knowledge gaps, and emerging research needs

Trait Response to Nitrogen and Salinity in Rhizophora mangle Propagules and Variation by Maternal Family and Population of Origin

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