Carbon and Nitrogen Sequestration of Melaleuca Floodplain Wetlands in Tropical Australia

Adame, Maria Fernanda; Reef, Ruth; Wong, Vanessa Nl; Balcombe, Stephen Richard; Turschwell, Mischa P.; Kavehei, Emad; Rodríguez, D. C.; Kelleway, Jeffrey J.; Masqué, Pere; Ronan, Mike

doi:10.1007/s10021-019-00414-5

Cited by 30 publications

(25 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During inundation periods, material from the catchment is transported and deposited within these wetlands [1,4]. As a result, floodplain forested wetlands can be considered sinks of nutrients and other pollutants, contributing to the improvement of water quality [5,6]. However, these wetlands can be threatened by the same material that they accumulate; excess nutrients and other pollutants can ultimately cause their degradation [7].…”

Section: Introductionmentioning

confidence: 99%

Potential Pollution Sources from Agricultural Activities on Tropical Forested Floodplain Wetlands Revealed by Soil eDNA

Adame

Reef

2020

Forests

View full text Add to dashboard Cite

Tropical floodplain wetlands are found in low-lying areas that are periodically inundated. During wet periods, these wetlands can receive large amounts of suspended and dissolved material from the catchment, including many potential pollutants. In this study, we use traditional isotope tracers (δ15N and δ13C) along with soil eDNA to investigate the sources of transported materials and potential contaminants in seven forested floodplain wetlands in tropical Australia. We hypothesised that eDNA and isotope tracers in the soil would reflect the land use of the catchment. Our goal was to test whether eDNA could be used as a potential tool to identify and monitor pollutants in floodplain wetlands. The sampling sites were located within catchments that have a mosaic of land types, from well-conserved rainforests to intensive agricultural land uses, such as grazing, sugar cane, wood production, and horticulture. The soil eDNA was comprised of a mix of plant species consistent with the land use of the catchments. Most of the eDNA pool was derived from native trees, accounting for 46.2 ± 6.5% of the total; while cultivated species associated with agricultural activities contributed to 1–24% of the total. From the cultivated species, highest contributions (>5%) were from Sorghum sp. used for grazing, banana (Musa ornata), melons (Cucumis melo), and Pinus radiata and Juniperus sp. grown for wood production. Interestingly, tropical wetlands on sites 15 km offshore had soil eDNA from agricultural activities of the mainland, highlighting the connectivity of these wetlands, probably during extensive floods. Overall, soil eDNA, more than isotopic tracers, showed promising results for tracing and monitoring potential pollutants in tropical floodplain wetlands that are highly connected and susceptible to environmental degradation.

show abstract

Section: Introductionmentioning

confidence: 99%

Potential Pollution Sources from Agricultural Activities on Tropical Forested Floodplain Wetlands Revealed by Soil eDNA

Adame

Reef

2020

Forests

View full text Add to dashboard Cite

show abstract

“…Our urbanized and nonurbanized wetlands may have shown similarities in TC stocks despite differences in carbon loads due to the more extensive historical accumulation of carbon and stabilization of carbon stocks within non-urbanized sites. Additionally, variability in sedimentation accumulation, hydrologic regime, or vegetation community at the plot level can account for differences-or lack thereof-in soil carbon content despite similarities in landscape characterization (Adame et al 2020;Bridgham et al 1998;Chmura et al 2003). In addition to addressing these factors, future research could better de ne this study's uncertainties in the relationship between urbanization and soil carbon by focusing on the study design: i.e., increasing the number of wetland sites per combination of urbanization degree and physiographic province, including sites within watersheds of not only similar %ISC but also patterns of %ISC, and limiting variability in plot and site hydrologic regimes.…”

Section: Soil Carbon and Nitrogenmentioning

confidence: 99%

Assessment of carbon storage potential of forested wetland soils as affected by urbanization degree in two different physiographic provinces of Virginia, USA

Ledford

Schmidt

Ahn

2021

Preprint

View full text Add to dashboard Cite

This study assessed carbon storage potential in terms of total carbon (TC) and total carbon stocks (TC stocks) in soils of four forested wetlands in Northern Virginia along with associated soil physicochemistry [e.g., soil pH, bulk density (Db), and gravimetric soil moisture (GSM)]. The study sites were selected across two vastly different degrees of urbanization (urban [U]; non-urban [N]) and the two main physiographic provinces of the region (Piedmont; Coastal Plain). Soils were sampled and analyzed at three depth intervals (0-10cm; 10-20cm; 20-30cm). No significant differences were found in TC (3.07 ± 0.31% [U]; 3.82 ± 0.40%; [N]) or TC stocks (2.81 ± 0.35 kg∙m− 2 [U]; 3.58 ± 0.28 kg∙m− 2 [N]) between urbanization degrees (p > 0.05). There was no significant difference in TC stocks by physiographic province (p > 0.05), however, Coastal Plain wetland soils had higher TC than the Piedmont wetlands (4.32 ± 0.41%; 2.57 ± 0.22%, p < 0.05). Db and GSM were significantly different along urbanization degree and physiography, and were highly correlated to TC, being able to estimate the total variability of TC to a significant degree (R2 = 0.39 and R2 = 0.47, all p < 0.05). The outcome shows that urban wetlands fairly mirror the carbon storage potential of non-urban wetlands and more likely so in the Coastal Plain than in the Piedmont, especially in their top 10 cm of soils. Further studies may be warranted across an urbanizing landscape to elucidate carbon storage potentials of urban wetlands that can combat urban carbon emissions.

show abstract

“…Australia (Serrano et al, 2019;Xiong et al, 2019), 0.62 respectively for Melaleuca wetlands in north Queensland (Adame et al, 2019b), and 0.35 for saltmarsh in subtropical Australia (Serrano et al, 2019).…”

Section: Sugarcane N2o From Leaching and Runoff Of N Mineralisationmentioning

confidence: 99%

“…After 25 years, annual AGB carbon sequestration was estimated using reported accumulation rates (Mg C ha -1 yr -1 ) of 3.72 for mangroves in the tropics worldwide (Xiong et al, 2019), and 5.00 for Melaleuca wetlands in north Queensland (Adame et al, 2019b).…”

Section: Sugarcane N2o From Leaching and Runoff Of N Mineralisationmentioning

confidence: 99%

“…In north Queensland, Melaleuca wetlands were found to have a mean total N stock of 8.5 ± 2.0 (1.7 -14) Mg N ha -1 , similar to those of nearby saltmarsh (8.5 Mg N ha -1 ), and mangroves (10 Mg N ha -1 ). Soil in Melaleuca wetlands contributed between 93 and 96% of the total N stock, however accumulated N at a similar rate in their soils and trees (26 ± 14 kg N yr -1 ) (Adame et al, 2019b). N stocks in saltmarsh have been reported to be much less; 1.1 Mg N ha -1 in South Portugal (Santos et al, 2019).…”

Section: G3 Dissolved Inorganic Nitrogen Removal Literature Reviewmentioning

confidence: 99%

See 1 more Smart Citation

Improving outcomes and delivering multiple benefits in ecological restoration

Hagger¹

View full text Add to dashboard Cite

show abstract

Carbon and Nitrogen Sequestration of Melaleuca Floodplain Wetlands in Tropical Australia

Cited by 30 publications

References 44 publications

Potential Pollution Sources from Agricultural Activities on Tropical Forested Floodplain Wetlands Revealed by Soil eDNA

Potential Pollution Sources from Agricultural Activities on Tropical Forested Floodplain Wetlands Revealed by Soil eDNA

Assessment of carbon storage potential of forested wetland soils as affected by urbanization degree in two different physiographic provinces of Virginia, USA

Improving outcomes and delivering multiple benefits in ecological restoration

Contact Info

Product

Resources

About