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uBio  Web  Results 71 - 80 of about 1850 Synonyms:    Thunbergia bogoroensis  Broader Terms:    Thunbergia (Clock Vine)      External Resources: 71.  Quantifying how changing mangrove cover affects ecosystem carbon storage in coastal wetlands. Charles SP, Kominoski JS, Armitage AR, Guo H, Weaver CA, Pennings SC Ecology Ecology Quantifying how changing mangrove cover affects ecosystem carbon storage in coastal wetlands. e02916 10.1002/ecy.2916 Despite overall global declines, mangroves are expanding into and within many subtropical wetlands, leading to heterogeneous cover of marsh-mangrove coastal vegetation communities near the poleward edge of mangroves' ranges. Coastal wetlands are globally important carbon sinks, yet the effects of shifts in mangrove cover on organic-carbon (OC) storage remains uncertain. We experimentally maintained black mangrove (Avicennia germinans) or marsh vegetation in patches (n = 1,120, 3 × 3 m) along a gradient in mangrove cover (0-100%) within coastal wetland plots (n = 10, 24 × 42 m) and measured changes in OC stocks and fluxes. Within patches, above and belowground biomass (OC) was 1,630% and 61% greater for mangroves than for recolonized marshes, and soil OC was 30% greater beneath mangrove than marsh vegetation. At the plot scale, above and belowground biomass increased linearly with mangrove cover but soil OC was highly variable and unrelated to mangrove cover. Root ingrowth was not different in mangrove or marsh patches, nor did it change with mangrove cover. After 11 months, surface OC accretion was negatively related to plot-scale mangrove cover following a high-wrack deposition period. However, after 22 months, accretion was 54% higher in mangrove patches, and there was no relationship to plot-scale mangrove cover. Marsh (Batis maritima) leaf and root litter had 1,000% and 35% faster breakdown rates (k) than mangrove (A. germinans) leaf and root litter. Soil temperatures beneath mangroves were 1.4°C lower, decreasing aboveground k of fast- (cellulose) and slow-decomposing (wood) standard substrates. Wood k in shallow soil (0-15 cm) was higher in mangrove than marsh patches, but vegetation identity did not impact k in deeper soil (15-30 cm). We found that mangrove cover enhanced OC storage by increasing biomass, creating more recalcitrant organic matter and reducing k on the soil surface by altering microclimate, despite increasing wood k belowground and decreasing allochthonous OC subsidies. Our results illustrate the importance of mangroves in maintaining coastal OC storage, but also indicate that the impacts of vegetation change on OC storage may vary based on ecosystem conditions, organic-matter sources, and the relative spatiotemporal scales of mangrove vegetation change. © 2019 by the Ecological Society of America. Charles Sean P SP 0000-0002-5626-1192 Department of Biological Sciences and Southeast Environmental Research Center, Florida International University, Miami, Florida, 33199, USA. Kominoski John S JS 0000-0002-0978-3326 Department of Biological Sciences and Southeast Environmental Research Center, Florida International University, Miami, Florida, 33199, USA. Armitage Anna R AR 0000-0003-1563-8026 Department of Marine Biology, Texas A&M University at Galveston, P.O. Box 1675, Galveston, Texas, 77553, USA. Guo Hongyu H Department of Biology and Biochemistry, University of Houston, Houston, Texas, 77204, USA. Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, 300387, China. Weaver Carolyn A CA 0000-0002-1447-6371 Department of Ecosystem Science and Management, Texas A&M University, College Station, Texas, 77843, USA. Pennings Steven C SC 0000-0003-4757-7125 Department of Biology and Biochemistry, University of Houston, Houston, Texas, 77204, USA. eng Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2019 12 17 United States Ecology 0043541 0012-9658 7440-44-0 Carbon IM Avicennia Carbon Climate Change Ecosystem Wetlands Gulf of Mexico blue carbon climate change coastal wetlands ecosystem function mangrove expansion regime shift sea-level rise vegetation change 2019 03 04 2019 06 20 2019 09 11 2019 10 28 6 0 2020 9 26 6 0 2019 10 25 6 0 ppublish 31646613 10.1002/ecy.2916