Terrestrial–marine connectivity: patterns of terrestrial soil carbon deposition in coastal sediments determined by analysis of glomalin related soil protein

Adame, Maria Fernanda, Wright, Sara F., Grinham, Alistair, Lobb, Kellie, Reymond, Claire E. and Lovelock, Catherine E. (2012) Terrestrial–marine connectivity: patterns of terrestrial soil carbon deposition in coastal sediments determined by analysis of glomalin related soil protein. Limnology and Oceanography, 57 5: 1492-1502.

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Author Adame, Maria Fernanda
Wright, Sara F.
Grinham, Alistair
Lobb, Kellie
Reymond, Claire E.
Lovelock, Catherine E.
Title Terrestrial–marine connectivity: patterns of terrestrial soil carbon deposition in coastal sediments determined by analysis of glomalin related soil protein
Journal name Limnology and Oceanography  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2012-09-01
Sub-type Article
DOI 10.4319/lo.2012.57.5.1492
Volume number 57
Issue number 5
ISSN 0024-3590; 1939-5590
Start page 1492
End page 1502
Total pages 11
Place of publication Waco, TX, United States
Publisher American Society of Limnology and Oceanography
Collection year 2013
Language eng
Formatted abstract Glomalin, an arbuscular mycorrhizal protein component of soil, can be used as an indicator of terrigenous-derived carbon. We measured glomalin in sediments using the terrestrial end-member as a reference in four coastal settings: (1) intertidal seagrass meadows distributed over a rainfall gradient, (2) sediments inshore and offshore from the mouth of a river, (3) coastal coral reefs at various distances from the shore, and (4) intertidal wetlands with varying levels of groundwater influence. Across the rainfall gradient, glomalin in seagrass meadow sediments increased at sites with high mean annual rainfall during the wet season (r2 = 0.27; F1,29 = 5.75; p = 0.029). Glomalin decreased in inshore river sediments (terrestrial) to offshore (marine) sediments (r2 = 0.81; F1,17 = 71.7; p ≤ 0.0001). Furthermore, glomalin in reef sediments decreased with distance from the shore. The high intertidal was rich in glomalin where groundwater flowed directly into the wetland compared with those with little groundwater influences. Our data indicate that rivers and groundwater transport terrestrial material, and that mangroves, salt marsh, seagrass meadows, and coral reefs accumulate it, but the connections vary among sites, within sites, and seasonally. Variations in glomalin concentrations are indicative of links between the terrestrial and marine environment that reflect proximity, filtration services, and the level of subsidies that marine ecosystems derive from terrestrial sources. Assessment of glomalin contributes to evaluating terrestrial–marine connectivity, and thus provides knowledge to improve catchment management for the protection of marine ecosystems.
Keyword Glomalin in reef sediments
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 27 Sep 2012, 12:39:09 EST by Dr Alistair Grinham on behalf of School of Civil Engineering