Carbon and nutrient accumulation in tropical mangrove creeks, Amazon region

Matos, Christiene R.L.; Berrêdo, José Francisco; Machado, Wilson; Sanders, Christian J.; Metzger, Édouard; Cohen, Marcelo Cancela Lisboa

doi:10.1016/j.margeo.2020.106317

Cited by 27 publications

(24 citation statements)

References 70 publications

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“…Total dissolved carbon plus litter outwelling was comparable to sediment burial rates (Fig. 5) estimated for nearby mangroves (Matos et al 2020). At the shelf scale, total dissolved carbon outwelling exceeded burial rates (Aller et al 1996) and CO 2 fluxes seem to represent a minor fraction (4.2%) of the carbon budget.…”

Section: Carbon and Alkalinity Outwelling Across Different Spatial Scalessupporting

confidence: 69%

Carbon and alkalinity outwelling across the groundwater‐creek‐shelf continuum off Amazonian mangroves

Cabral

Dittmar

Call

et al. 2021

Limnol Oceanogr Letters

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Carbon sequestration in mangroves is often estimated from their sediment storage capacity. However, lateral transport (outwelling) of dissolved carbon and alkalinity from intertidal wetlands can also drive long-term storage in the ocean. Here, we quantified outwelling rates across the groundwater-creek-shelf continuum of the world's largest continuous mangrove belt in the Amazon region. Dissolved inorganic carbon (DIC) fluxes exceeded dissolved organic carbon over all spatial scales. Since 90% AE 13% of mangrove-derived DIC was bicarbonate, there is potential for long-term carbon storage offshore. Outwelling seems to exceed sediment burial as a carbon sequestration pathway in this and other mangrove-dominated coastlines.

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Section: Carbon and Alkalinity Outwelling Across Different Spatial Scalessupporting

confidence: 69%

Carbon and alkalinity outwelling across the groundwater‐creek‐shelf continuum off Amazonian mangroves

Cabral

Dittmar

Call

et al. 2021

Limnol Oceanogr Letters

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“…Binary diagram showing δ 13 C and C/N values for the facies association (mangrove/herbaceous tidal flat, tidal flat, and herbaceous flat) according to the ranges recorded for C3/C4 terrestrial plants and freshwater/marine algae (Deines, 1980; Schidlowski et al ., 1983; Meyers, 1994; Tyson, 1995; Lamb et al ., 2006; Matos et al ., 2020). [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Resultsmentioning

confidence: 99%

“…Organic matter from terrestrial and aquatic plants exhibits δ 15 N values between ~0 and ~10‰, respectively (Schidlowski et al ., 1983). Mangrove trees typically exhibit the following values: Rhizophora (δ 13 C: −31.8 to −30.2‰ and C/N: 35.6 ± 0.8), Avicennia (δ 13 C: −30.4 to −29.1‰ and C/N: 35 ± 4.3), and Laguncularia (δ 13 C: −30.4 to −29.2‰ and C/N: 31.4 ± 2.3) (Matos et al ., 2020).…”

Section: Methodsmentioning

confidence: 99%

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Effects of the middle Holocene high sea‐level stand and climate on Amazonian mangroves

Cohen

Camargo

Pessenda

et al. 2021

J Quaternary Science

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The high sea-level stand during the mid-Holocene is a benchmark in mangrove dynamics along the north-east/south-east coast of Brazil and provides a reference point for landward and seaward mangrove migrations corresponding to changes in relative sea level (RSL). However, evidence of the impacts associated with RSL fall on the northern Brazilian coast is scarce. Multi-proxy data from the highest tidal flats of the Bragança Peninsula in northern Brazil revealed modern herbaceous areas were occupied by mangroves Rhizophora and Avicennia from 6250 to~5850 cal a BP, and only Avicennia between~5850 and~5000 cal a BP. The same tidal flats were vegetation-free between~5000 and~4300 cal a BP. A combination of a high sea-level stand (0.6 ± 0.1 m) at 5000 cal a BP and a dry early-middle Holocene in the Amazon probably caused an increase in porewater salinity of tidal flats, which resulted in a mangrove succession from Rhizophora to Avicennia dominance. RSL fall accentuated this process, contributing to mangrove degradation between~5000 and~4300 cal a BP. RSL fall, and a wetter period over the past~4300 cal a BP caused a mangrove migration from highest to lowest flats, followed by expansion of herbaceous vegetation on the highest flats.

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“…For instance, the same mangrove species (e.g., Rhizophora sp.) can reach up to 30 m in the Amazon region (0.7°S; Matos et al, 2020), whereas its average height in Guangxi ( ∼21°N) is merely about 3 m. Therefore, air temperature and rainfall are expected to control mangrove development by impacting their diversity, productivity, and area (Ellison, 2008;Gilman et al, 2008;Friess et al, 2019).…”

Section: Air Temperature and Rainfallmentioning

confidence: 99%

Response of Mangrove Development to Air Temperature Variation Over the Past 3000 Years in Qinzhou Bay, Tropical China

et al. 2021

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Mangroves, a blue carbon ecosystem between land and ocean in the (sub)tropics, are sensitive to changes in climate and the sea level. It is imperative to reconstruct the historical dynamics of their development to predict the fate of mangrove ecosystems in the backdrop of rapid global changes. This study analyzes records of the sources of organic matter from sediment core Q43 of Qinzhou Bay in tropical China by using the endmember mixing model based on stable organic carbon isotopes and C/N ratio. Mangrove-derived organic matter (MOM) is regarded as a reliable indicator for reconstructing the historical development of mangroves. The variations in MOM in Qinzhou Bay over the past ∼3,000 cal yr BP indicate that mangrove forests underwent two periods of flourishment: ∼2,200–1,750 cal yr BP and ∼1,370–600 cal yr BP, as well as three periods of deterioration: ∼3,000–2,200 cal yr BP, ∼1,750–1,370 cal yr BP, and ∼600–0 cal yr BP. Of factors that might have been influential, changes in the relative sea level and the regional hydrological environment (e.g., seawater temperature, salinity, and hydrodynamic conditions) did not appear to have notable effects on mangrove flourishing/degradation. However, climate change, especially the variation in air temperature, formed the primary factor controlling mangrove development. The stages of mangrove flourishing/deterioration corresponded to the warm/cold periods of the climate, respectively. Noteworthy is that the rapid rise in air temperature during the Anthropocene warm period should have promoted mangrove development, but the increasing intensity of human activity has reversed this tendency leading to the degradation of mangroves.

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Carbon and nutrient accumulation in tropical mangrove creeks, Amazon region

Cited by 27 publications

References 70 publications

Carbon and alkalinity outwelling across the groundwater‐creek‐shelf continuum off Amazonian mangroves

Carbon and alkalinity outwelling across the groundwater‐creek‐shelf continuum off Amazonian mangroves

Effects of the middle Holocene high sea‐level stand and climate on Amazonian mangroves

Response of Mangrove Development to Air Temperature Variation Over the Past 3000 Years in Qinzhou Bay, Tropical China

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