Water Hyacinth’s Effect on Greenhouse Gas Fluxes: A Field Study in a Wide Variety of Tropical Water Bodies
| Autor: | Andrea Budiša, Ralf Aben, Jan G. M. Roelofs, Stefan T. J. Weideveld, Janne Nauta, Célia Alves de Souza, Leon P. M. Lamers, Sarian Kosten, Ernandes Sobreira Oliveira Junior, Claumir Cesar Muniz, Tamara J. H. M. van Bergen |
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| Přispěvatelé: | Olff group, Govers group |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
floating macrophytes 010504 meteorology & atmospheric sciences Wetland methane emission ebullitive flux global warming 010603 evolutionary biology 01 natural sciences Tropical waters Methane Sink (geography) chemistry.chemical_compound Eichhornia crassipes carbon dioxide Pantanal Amazon Environmental Chemistry Organic matter Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences chemistry.chemical_classification geography geography.geographical_feature_category Ecology biology Hyacinth Environmental engineering Aquatic Ecology biology.organism_classification chemistry Ecological Microbiology Greenhouse gas Carbon dioxide Environmental science Environmental Sciences |
| Zdroj: | Ecosystems, 24, 988-1004 Ecosystems, 24(4), 988-1004. SPRINGER Ecosystems, 24, pp. 988-1004 |
| ISSN: | 1432-9840 |
| DOI: | 10.1007/s10021-020-00564-x |
| Popis: | Water hyacinth is able to sequester large amounts of carbon dioxide (CO2) in wetlands. At the same time, the high production of organic matter combined with the plant’s capacity to limit the diffusion of oxygen from the atmosphere into the water creates favorable conditions for the production of methane (CH4). The combination of these mechanisms challenges the prediction of water hyacinth’s net effects on greenhouse gas (GHG) emissions. To unravel the impact of water hyacinth on GHG fluxes, we performed an extensive fieldwork study encompassing 22 sites dominated by water hyacinth in the Pantanal and Amazon during two different seasons. The highest CH4 emissions from water hyacinth beds occurred in shallow systems where sediment rooting enabled plant-mediated CH4 transport (307 ± 407 mg CH4 m−2 day−1 in waters shallower than 1 m, as opposed to 6.1 ± 10.6 mg CH4 m−2 day−1 in deeper waters). When CO2 uptake rates are added to the GHG budget (in terms of global warming potential), the water bodies were usually a GHG sink (− 5.2 ± 10 gCO2 eq m−2 day−1). The strength of the sink is highest in deeper systems where even a low water hyacinth coverage may already offset open water emissions. This dual effect of strong CO2 uptake—and at least temporal carbon storage in biomass—in combination with a high CO2–to-biomass-to-CH4 (and possibly back to CO2) conversion highlights the necessity to include vegetation characteristics in relation to depth when estimating GHG fluxes for tropical wetlands. |
| Databáze: | OpenAIRE |
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