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Forests 2018, 9(10), 596; https://doi.org/10.3390/f9100596

Impact of Global Change on Nutrient Dynamics in Mangrove Forests

Tropical Coastal & Mangrove Consultants, 6 Cobb Court, Annandale, QLD 4814, Australia
Received: 31 August 2018 / Revised: 15 September 2018 / Accepted: 25 September 2018 / Published: 25 September 2018
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Abstract

The cycling of essential nutrients is central to mangrove productivity. A mass balance shows that mangroves rely on soil ammonification, nitrification, and dissimilatory reduction to ammonium for available nitrogen. Mangroves are often nutrient limited and show tight coupling between nutrient availability and tree photosynthesis. This relationship and, thus, forest productivity can be disrupted by various disturbances such as deforestation, changes in hydrology due to impoundments, land-use change, increasing frequency and intensity of storms, increasing temperatures, increasing atmospheric CO2 concentrations, and a rising sea-level. Deforestation and hydrological changes are the most devastating to soil nutrient-plant relations and mangrove productivity. Land-use changes can result in positive and negative impacts on mangroves and can also results in increasing frequency of storms and intensity of storms. Increasing temperatures and atmospheric CO2 levels have an initially enhanced effect on mangroves and microbial transformation rates of nitrogen and phosphorus. The effects of rising seas are complex and depend on the local rate of sea-level rise, the soil accretion rate, the subsidence or uplift rate, and the tidal position. If mangroves cannot keep pace with a sea-level rise, seaward mangroves will likely drown but landward mangroves will expand and show enhanced growth and more rapid nutrient cycling if space permits. View Full-Text
Keywords: climate change; disturbance; global change; mangrove; nitrogen; nutrients; phosphorus climate change; disturbance; global change; mangrove; nitrogen; nutrients; phosphorus
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Alongi, D.M. Impact of Global Change on Nutrient Dynamics in Mangrove Forests. Forests 2018, 9, 596.

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