A comparison of mangrove and marsh influences on soil respiration rates: A mesocosm study

Geoghegan, Emily K.; Langley, J. Adam; Chapman, Samantha K.

doi:10.1016/j.ecss.2020.106877

Cited by 7 publications

(3 citation statements)

References 56 publications

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“…Bianchi et al (2013) and Vaughn et al (2020) both reported higher lignin inputs into mangrove soils than saltmarsh soils, suggesting more recalcitrant compounds within mangrove soils. Similarly, rates of mineralization of C and N have been demonstrated to be greater in saltmarsh soils compared to mangrove soils (Steinmuller et al, 2020;Geoghegan et al, 2021). Together, these conclusions suggest greater preservation potential and resilience to mineralization associated with relative sea level rise and other aspects of global climate change within mangrove soils, relative to saltmarsh soils.…”

Section: Locationmentioning

confidence: 87%

Coastal Wetland Soil Carbon Storage at Mangrove Range Limits in Apalachicola Bay, FL: Observations and Expectations

Steinmuller

Breithaupt

Engelbert

et al. 2022

Front. For. Glob. Change

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Globally, mangrove range limits are expanding, often at the cost of adjacent coastal ecosystems including saltmarshes, potentially leading to a change in ecosystem services such as organic carbon (OC) sequestration. Studies in the southeastern US have focused almost exclusively on Avicennia germinans range expansion, the most cold-tolerant mangroves in North America. The Apalachicola Bay region of north Florida represents the northern range limit of mangroves in the Gulf of Mexico, and uniquely also includes Rhizophora mangle. The objective of this research was to quantify soil OC density beneath both mangrove species and compare results to the soils beneath two contiguous native tidal saltmarsh species: Juncus roemerianus and Spartina alterniflora in a barrier island setting. Dominant plant taxa were not a significant predictor of soil OC density, highlighting the relative importance of site-specific environmental attributes as controls on soil properties. Soil profile δ13C compositions included a range of values reflective of C3 and C4 plant inputs, suggesting that shifts in plant taxa, both from marsh to mangroves and between marsh species, have been occurring at all sites in this study. These findings support much of the literature on mangrove encroachment, which indicates mangrove soil OC concentrations, densities, or stocks are less than or equal to that of co-located tidal marsh habitats. Through a systematic review, the potential of several proposed explanatory variables (climate, environmental setting, plant physiology and productivity, and duration of encroachment) were identified to evaluate how soil OC density in mangrove habitats might increase over time, which is critical to forecasting how continued mangrove expansion might affect blue C storage as these habitats evolve.

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Section: Locationmentioning

confidence: 87%

Coastal Wetland Soil Carbon Storage at Mangrove Range Limits in Apalachicola Bay, FL: Observations and Expectations

Steinmuller

Breithaupt

Engelbert

et al. 2022

Front. For. Glob. Change

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“…In general, more productive coastal wetland ecosystems tend to support higher soil carbon burial rates and the rapid development of soil carbon stocks (Kauffman & Bhomia, 2017; McKee et al, 2007; Osland, Gabler, et al, 2018; Rovai et al, 2018). Thus, where decomposition rates are similar (e.g., Geoghegan et al, 2020), the soil carbon implications of mangrove expansion may be heavily influenced by the productivity of the interacting salt marsh and mangrove plant communities. Due in part to differences in leaf C:N ratios, aboveground leaf litter decay rates can be higher in A. germinans compared to S. alterniflora (Perry & Mendelssohn, 2009; Simpson et al, 2020; Smith et al, 2019).…”

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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“…Also, plant-microbe interactions in the rhizosphere, including priming effects, can markedly differ between herbaceous and woody plants in terrestrial ecosystems (Huo et al, 2017). Overall, however, empirical evidence of differences in plant-plant and plant-microbe interactions between woody and herbaceous communities is scarce to absent for other than terrestrial ecosystems (Geoghegan et al, 2021).…”

Section: Ecosystem-specific Effects On Carbon Cyclingmentioning

confidence: 99%

Biota‐mediated carbon cycling—A synthesis of biotic‐interaction controls on blue carbon

et al. 2022

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Biota play an obvious key role in terrestrial and aquatic carbon cycling (Schlesinger & Bernhardt, 2013). Biotamediated carbon cycling is the consequence of basic physiological functions and refers to the transformation of CO 2 into organic matter (OM) through assimilation by primary producers (including plants, algae and autotrophic prokaryotes) and the release of CO 2 (or CH 4 ) through dissimilatory processes such as respiration by consumers (predominantly animals), microbial decomposers (including fungi, bacteria and archaea) and primary producers (Hügler & Sievert, 2011;Rosenberg et al., 2014;Thauer et al., 2008). Besides these direct biota-mediated effects on carbon cycling, biotic interactions between producers, consumers and decomposers can induce important changes in the rate of assimilatory and dissimilatory processes and thereby exert indirect

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A comparison of mangrove and marsh influences on soil respiration rates: A mesocosm study

Cited by 7 publications

References 56 publications

Coastal Wetland Soil Carbon Storage at Mangrove Range Limits in Apalachicola Bay, FL: Observations and Expectations

Coastal Wetland Soil Carbon Storage at Mangrove Range Limits in Apalachicola Bay, FL: Observations and Expectations

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

Biota‐mediated carbon cycling—A synthesis of biotic‐interaction controls on blue carbon

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