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  • Root biomass and production of mangroves surrounding a karstic oligotrophic coastal lagoon

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    Author(s)
    Fernanda Adame, Maria
    Teutli, Claudia
    Santini, Nadia S
    Caamal, Juan P
    Zaldivar-Jimenez, Arturo
    Hernandez, Raquel
    Herrera-Silveira, Jorge A
    Griffith University Author(s)
    Adame Vivanco, Fernanda
    Year published
    2014
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    Abstract
    Root production influences a range of belowground processes, such as soil accretion, carbon sequestration and nutrient acquisition. Here, we measured biomass and root production of mangroves surrounding a karstic oligotrophic lagoon that spans a nutrient and salinity gradient. We also measured forest structure and soil physicochemical conditions (salinity, bulk density, carbon, nitrogen (N) and phosphorus (P)) in order to determine factors associated with root production. We tested the following hypotheses: 1) root biomass and production increase at low soil P and N in order to maximize resource utilization, and 2) root ...
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    Root production influences a range of belowground processes, such as soil accretion, carbon sequestration and nutrient acquisition. Here, we measured biomass and root production of mangroves surrounding a karstic oligotrophic lagoon that spans a nutrient and salinity gradient. We also measured forest structure and soil physicochemical conditions (salinity, bulk density, carbon, nitrogen (N) and phosphorus (P)) in order to determine factors associated with root production. We tested the following hypotheses: 1) root biomass and production increase at low soil P and N in order to maximize resource utilization, and 2) root biomass and production increase with high interstitial salinity. Root biomass (947 - 3040 g m-2) and production (0.46 - 1.85 g m-2 d-1) increased where soil P and interstitial salinity were relatively high. Thus, we rejected the first hypothesis and confirmed the second. The larger root fraction (5 - 20 mm) was the major contributor to root biomass and production. Our findings suggest that root production and thus capacity for belowground carbon storage in karstic regions, where P is often limiting, is greater where interstitial salinity and P are higher. This contrasts with past assessments indicating that P-deficiency stimulates root growth, suggesting wide variation in belowground responses in mangroves.
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    Journal Title
    Wetlands
    Volume
    34
    Issue
    3
    DOI
    https://doi.org/10.1007/s13157-014-0514-5
    Copyright Statement
    © 2014 Springer Netherlands. This is an electronic version of an article published in Wetlands, June 2014, Volume 34, Issue 3, pp 479–488. Wetlands is available online at: http://link.springer.com// with the open URL of your article.
    Subject
    Earth sciences
    Environmental sciences
    Biological sciences
    Marine and estuarine ecology (incl. marine ichthyology)
    Publication URI
    http://hdl.handle.net/10072/63391
    Collection
    • Journal articles

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