2014
DOI: 10.1371/journal.pone.0107868
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Rapid Losses of Surface Elevation following Tree Girdling and Cutting in Tropical Mangroves

Abstract: The importance of mangrove forests in carbon sequestration and coastal protection has been widely acknowledged. Large-scale damage of these forests, caused by hurricanes or clear felling, can enhance vulnerability to erosion, subsidence and rapid carbon losses. However, it is unclear how small-scale logging might impact on mangrove functions and services. We experimentally investigated the impact of small-scale tree removal on surface elevation and carbon dynamics in a mangrove forest at Gazi bay, Kenya. The t… Show more

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Cited by 84 publications
(69 citation statements)
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“…Although, high rates of CO 2 emissions are expected when sediments are exposed to more oxic conditions as occurs with the construction of aquaculture ponds (Kauffman et al, 2014), forest mortality without sediment disturbance gave equivalently high estimates of CO 2 emissions (e.g., Cahoon et al, 2003;Sidik and Lovelock, 2013;Lang'at et al, 2014) that often exceeded the model estimates even at α = 1. High rates of CO 2 emissions in converted mangrove ecosystems may reflect the importance of additional factors that stimulate carbon remineralization under disturbed conditions (e.g., Bianchi, 2011, discussed below).…”
Section: Discussionmentioning
confidence: 95%
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“…Although, high rates of CO 2 emissions are expected when sediments are exposed to more oxic conditions as occurs with the construction of aquaculture ponds (Kauffman et al, 2014), forest mortality without sediment disturbance gave equivalently high estimates of CO 2 emissions (e.g., Cahoon et al, 2003;Sidik and Lovelock, 2013;Lang'at et al, 2014) that often exceeded the model estimates even at α = 1. High rates of CO 2 emissions in converted mangrove ecosystems may reflect the importance of additional factors that stimulate carbon remineralization under disturbed conditions (e.g., Bianchi, 2011, discussed below).…”
Section: Discussionmentioning
confidence: 95%
“…For example, drainage of peat deposits results in exposure of sediment organic matter to concentrations of oxygen sufficient to stimulate rapid decomposition (Couwenberg et al, 2010). The clearing of mangroves (without excavation) results in CO 2 emissions from sediments probably due to changes in both the structure of sediments and microbial processes as roots die and redox conditions and nutrient availability changes (Lovelock et al, 2011;Lang'at et al, 2014). Excavation of mangrove and tidal marsh sediments to construct ponds for aquaculture may result in high initial emissions as a larger portion of the sediment carbon may be exposed to air (Kauffman et al, 2014).…”
Section: Discussionmentioning
confidence: 99%
“…Our model does not account for long-term and nonlinear feedbacks within the system where elevation deficits may be enhanced or reduced, for example, through episodic high-wave-energy events that cause erosion 24 , degradation of forests 25 , other stochastic events such as intense storms that may alter hydrology or deliver sediment pulses 26 , or changes in ocean circulation that may influence regional rates of SLR 7 . The frequency and intensity of these events are predicted to increase under climate-change scenarios 2 , and all of these factors will influence the length of time before forest submergence and loss.…”
Section: Research Lettermentioning
confidence: 99%
“…Soil collapse due to deforestation (Krauss et al 2010;Langat et al 2014), the influences of trampling (Kauffman et al 2004), and the absence of a reliable marker in the deep alluvial soils of the sampled mangroves and pastures compounds difficulties in the comparisons of soil properties based upon depth or volume. At a similar depth there is simply more mass of soil in the pastures than in the mangroves.…”
Section: Soil Carbon and Nutrientsmentioning
confidence: 99%