Blue carbon in coastal landscapes: a spatial framework for assessment of stocks and additionality

Rogers, Kerrylee; Macreadie, Peter I.; Kelleway, Jeffrey J.; Saintilan, Neil

doi:10.1007/s11625-018-0575-0

Cited by 45 publications

(42 citation statements)

References 44 publications

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“…Pervasive eutrophication, siltation, mariculture, deforestation, land reclamation, and other land-use changes have led to widespread decline of blue C habitats ( Figure 1) with estimated losses of up to 50% of global extent over the last century and current losses of 8,000 km 2 annually (Alongi, 2002;Bridgham, Megonigal, Keller, Bliss, & Trettin, 2006;Duarte, Middelburg, & Caraco, 2005;Hamilton & Friess, 2018;Pendleton et al, 2012;Valiela, Bowen, & York, 2001). Consequently, advocacy for blue C conservation and restoration in international climate change agreements is gaining momentum (Rogers, Macreadie, Kelleway, & Saintilan, 2018;Editorial, 2016;Herr, von Unger, Laffoley, & McGivern, 2017).…”

mentioning

confidence: 99%

Differential effects of biological invasions on coastal blue carbon: A global review and meta‐analysis

Davidson

Cott

Devaney

et al. 2018

Global Change Biology

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Human‐caused shifts in carbon (C) cycling and biotic exchange are defining characteristics of the Anthropocene. In marine systems, saltmarsh, seagrass, and mangrove habitats—collectively known as “blue carbon” and coastal vegetated habitats (CVHs)—are a leading sequester of global C and increasingly impacted by exotic species invasions. There is growing interest in the effect of invasion by a diverse pool of exotic species on C storage and the implications for ecosystem‐based management of these systems. In a global meta‐analysis, we synthesized data from 104 papers that provided 345 comparisons of habitat‐level response (plant and soil C storage) from paired invaded and uninvaded sites. We found an overall net effect of significantly higher C pools in invaded CVHs amounting to 40% (±16%) higher C storage than uninvaded habitat, but effects differed among types of invaders. Elevated C storage was driven by blue C‐forming plant invaders (saltmarsh grasses, seagrasses, and mangrove trees) that intensify biomass per unit area, extend and elevate coastal wetlands, and convert coastal mudflats into C‐rich vegetated habitat. Introduced animal and structurally distinct primary producers had significant negative effects on C pools, driven by herbivory, trampling, and native species displacement. The role of invasion manifested differently among habitat types, with significant C storage increases in saltmarshes, decreases in seagrass, and no significant effect in mangroves. There were also counter‐directional effects by the same species in different systems or locations, which underscores the importance of combining data mining with analyses of mean effect sizes in meta‐analyses. Our study provides a quantitative basis for understanding differential effects of invasion on blue C habitats and will inform conservation strategies that need to balance management decisions involving invasion, C storage, and a range of other marine biodiversity and habitat functions in these coastal systems.

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confidence: 99%

Differential effects of biological invasions on coastal blue carbon: A global review and meta‐analysis

Davidson

Cott

Devaney

et al. 2018

Global Change Biology

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“…Approximately 134.5 Tg C was estimated to be stored, and between ~0.18 and 0.34 Tg C to be sequestered per year in the intertidal communities, with ~360 ha of forest as potentially vulnerable to dieback. This study provides baseline information on the mangrove and saltmarsh communities in the bioregion, which is important for conservation management and redresses some of the data deficiencies of these ecosystems identified by Himes‐Cornell, Pendleton, and Atiyah (2018); Rogers, Macreadie, Kelleway, and Saintilan (2018) and others.…”

Section: Discussionmentioning

confidence: 99%

“…Effective management of these ecosystems is important for maintaining their ecosystem services. For this to occur, baseline information is required on their floristic composition, structural diversity and extent (Barbier et al, 2011; Kuenzer, Bluemel, Gebhardt, Quoc, & Dech, 2011; Murray, Pendleton, Jenkins, & Sifleet, 2011; Rogers, Macreadie, Kelleway, & Saintilan, 2018). Data on vegetation cover, the description, and the extent of these communities are often gathered by satellite imagery classification (for example Hamilton and Friess (2018)) owing to problems of accessibility (Kuenzer, Bluemel, Gebhardt, Quoc, & Dech, 2011).…”

Section: Introductionmentioning

confidence: 99%

The intertidal plant communities in north‐eastern Australia, their carbon stores and vulnerability to extreme climate events

Addicott

Laurance

Bannink

et al. 2020

Aquatic Conservation

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1. During the strong El Niño event of 2015-2016 large-scale dieback of mangrove forests was observed in the Gulf of Carpentaria region of northern Australia. These and other intertidal communities are also extensive along the 7,400 km coastline of northeastern Australia. Determination of their floristic composition, potential carbon (C) store and sequestration capacity, and vulnerability to climate extremes is required for their effective conservation management and was the aim of this study. 2. Standardized, statewide quantitative classification methods identified five mangrove forest and three saltmarsh communities covering 2,604 km 2 along this coastline. 3. Estuarine and oceanic mangrove forests were mapped separately. Carbon storage and sequestration capacity of the intertidal communities and their vulnerability to strong El Niño events were estimated using published data and GIS analyses. 4. An estimated potential 126.2 (± 27.3 SEM) Tg C and 8.3 (±0.4 SD) Tg C were stored in the mangrove forests and saltmarshes, respectively. Comparatively, the rainforests of the region stored an estimated equivalent amount of C but covered three times the area, and the most widespread woodlands (Eucalyptus tetrodonta) of the region stored an estimated 1.5 times the C but covered 16 times the area. The C stored in the intertidal communities was estimated as equivalent to 493.47

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“…The contribution of macroalgae to carbon sequestration varies among species (Trevathan-Tackett et al, 2015), but more direct estimates are needed to quantify sequestration, and this requires a paradigm shift in accounting procedures as well as development of methods to trace carbon from donor to sink habitats in the ocean (Krause-Jensen et al, 2018). As vegetated ecosystems have declined substantially in area (Waycott et al, 2009), many coastal areas have been converted from carbon sinks to sources, a shift that can, in principle, be reversed (Pendleton et al, 2012;Macreadie et al, 2015Macreadie et al, , 2017Marbà et al, 2015;Kerrylee et al, 2018). One approach to quantifying the processes that mediate carbon storage and release from seagrass sediments is the TeaComposition H 2 O project, which uses widely available tea bags to measure organic carbon preservation in seagrass and other wetland sediments, currently under way across 350 nearshore marine sites.…”

Section: Carbon and Nutrient Storage By Marine Macrophytesmentioning

confidence: 99%

Toward a Coordinated Global Observing System for Seagrasses and Marine Macroalgae

et al. 2019

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Blue carbon in coastal landscapes: a spatial framework for assessment of stocks and additionality

Cited by 45 publications

References 44 publications

Differential effects of biological invasions on coastal blue carbon: A global review and meta‐analysis

Differential effects of biological invasions on coastal blue carbon: A global review and meta‐analysis

The intertidal plant communities in north‐eastern Australia, their carbon stores and vulnerability to extreme climate events

Toward a Coordinated Global Observing System for Seagrasses and Marine Macroalgae

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