Patterns of Root Dynamics in Mangrove Forests Along Environmental Gradients in the Florida Coastal Everglades, USA

Castañeda‐Moya, Edward; Twilley, Robert R.; Rivera‐Monroy, Victor H.; Marx, Brian D.; Coronado‐Molina, Carlos; Ewe, Sharon M. L.

doi:10.1007/s10021-011-9473-3

Cited by 159 publications

(126 citation statements)

References 76 publications

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“…Our estimates of the amount of live roots are probably underestimated because under control conditions (not fertilized) root mortality was not observed during the experiments of McKee et al [15]. In Florida, fine to small roots had longevities of 1.7 to 4.4 years [64], indicating that the abundance of live roots may be much larger than annual production and thus root respiration could be ~2 to 4 times higher than our conservatively estimated value. Studies in terrestrial forests have also found that root respiration can be a major component of soil respiration [65].…”

Section: Soil Respirationcontrasting

confidence: 41%

Carbon Budgets for Caribbean Mangrove Forests of Varying Structure and with Phosphorus Enrichment

Lovelock

Simpson

Duckett

et al. 2015

Forests

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Abstract:There are few detailed carbon (C) budgets of mangrove forests, yet these are important for understanding C sequestration in mangrove forests, how they support the productivity of the coast and their vulnerability to environmental change. Here, we develop C budgets for mangroves on the islands of Twin Cays, Belize. We consider seaward fringing forests and interior scrub forests that have been fertilized with phosphorus (P), which severely limits growth of trees in the scrub forests. We found that respiration of the aboveground biomass accounted for 60%-80% of the fixed C and that respiration of the canopy and aboveground roots were important components of respiration. Soil respiration accounted for only 7%-11% of total gross primary production (GPP) while burial of C in soils was ~4% of GPP. Respiration by roots can account for the majority of soil respiration in fringing forests, while microbial processes may account 80% of respiration in scrub forests. Fertilization of scrub forests with P enhanced GPP but the proportion of C buried declined to ~2% of GPP. Net ecosystem production was 17%-27% of GPP similar to that reported for other mangrove forests. Carbon isotope signatures of adjacent seagrass suggest that dissolved C from mangroves is exported into the adjacent ecosystems. Our data indicate that C budgets can vary among mangrove forest types and with nutrient enrichment and that low productivity mangroves provide a disproportionate share of exported C.

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Section: Soil Respirationcontrasting

confidence: 41%

Carbon Budgets for Caribbean Mangrove Forests of Varying Structure and with Phosphorus Enrichment

Lovelock

Simpson

Duckett

et al. 2015

Forests

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“…Thus, mangrove forests need to rapidly recover from storms in order to continue to accrete by expanding soils via roots and provide baffling to retain coastal sediments , Cahoon 2006. In South Florida's carbonate environment, belowground production of mangrove peat is considered an important soil-building and stabilization mechanism Chen and Twilley 1999;McKee et al 2007, Castañeda-Moya et al 2011, although vertical accretion contributes the majority of sediment volume accounting for forest elevation change in scrub and fringe forests (Table 1). Mangrove forests in South Florida, subsidized by mangrove belowground production and depositional events from hurricane storm surge, are currently sustaining a rate of forest floor elevation change between 1.0 and 2.4 mm year -1 .…”

Section: Forest Elevation Change and Stabilitymentioning

confidence: 99%

Climate Change Projected Effects on Coastal Foundation Communities of the Greater Everglades Using a 2060 Scenario: Need for a New Management Paradigm

Koch

Coronado

Miller

et al. 2014

Environmental Management

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Rising sea levels and temperature will be dominant drivers of coastal Everglades' foundation communities (i.e., mangrove forests, seagrass/macroalgae, and coral reefs) by 2060 based on a climate change scenario of +1.5 °C temperature, +1.5 foot (46 cm) in sea level, ±10 % in precipitation and 490 ppm CO2. Current mangrove forest soil elevation change in South Florida ranges from 0.9 to 2.5 mm year(-1) and would have to increase twofold to fourfold in order to accommodate a 2060 sea level rise rate. No evidence is available to indicate that coastal mangroves from South Florida and the wider Caribbean can keep pace with a rapid rate of sea level rise. Thus, particles and nutrients from destabilized coastlines could be mobilized and impact benthic habitats of southern Florida. Uncertainties in regional geomorphology and coastal current changes under higher sea levels make this prediction tentative without further research. The 2060 higher temperature scenario would compromise Florida's coral reefs that are already degraded. We suggest that a new paradigm is needed for resource management under climate change that manages coastlines for resilience to marine transgression and promotes active ecosystem management. In the case of the Everglades, greater freshwater flows could maximize mangrove peat accumulation, stabilize coastlines, and limit saltwater intrusion, while specific coral species may require propagation. Further, we suggest that regional climate drivers and oceanographic processes be incorporated into Everglades and South Florida management plans, as they are likely to impact coastal ecosystems, interior freshwater wetlands and urban coastlines over the next few decades.

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“…Consequently, nutrient enrichment in this plant community would be expected to modify the outcome of species interactions. Another study, conducted in the Florida Everglades (Castaneda-Moya et al 2011), found that variation in the availability of phosphorus to below-ground roots could influence future response of mangroves in that system to sea-level rise through modifications of root production and organic contributions to soil volume.…”

Section: Nutrient Enrichment and Pollutionmentioning

confidence: 99%

Coastal Habitats of the Gulf of Mexico

Mendelssohn

Byrnes

Kneib

et al. 2017

Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill

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Patterns of Root Dynamics in Mangrove Forests Along Environmental Gradients in the Florida Coastal Everglades, USA

Cited by 159 publications

References 76 publications

Carbon Budgets for Caribbean Mangrove Forests of Varying Structure and with Phosphorus Enrichment

Carbon Budgets for Caribbean Mangrove Forests of Varying Structure and with Phosphorus Enrichment

Climate Change Projected Effects on Coastal Foundation Communities of the Greater Everglades Using a 2060 Scenario: Need for a New Management Paradigm

Coastal Habitats of the Gulf of Mexico

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