China
Africa
Explore chapters and articles related to this topic
Basic Chemical Hazards to Wildlife
Published in Jack Daugherty, Assessment of Chemical Exposures, 2020
Peatland, also called mire, is an ecosystem that produces organic matter faster than it decomposes, thus accumulating partially decomposed vegetative material, called peat. A bog is a peat-accumulating wetland having no significant inflows or outflows. The peat becomes so thick that the surface vegetation is insulated from mineral soil, forcing the plants to depend on precipitation for both water and nutrients. Bogs are dominated by acid-forming sphagnum moss and other acidophilic mosses. Fens are partly drained, so peat never accumulates to the point where plants lose contact with water moving through mineral soil. Fens are dominated by glass-like sedges.
The Effect of Peatland Forestry on Fluxes of Carbon Dioxide, Methane, and Nitrous Oxide
Published in Carl C. Trettin, Martin F. Jurgensen, David F. Grigal, Margaret R. Gale, John K. Jeglum, Northern Forested Wetlands, 2018
Hannu Nykänen, Jouko Silvola, Jukka Alm, Pertti J. Martikainen
Virgin peatlands can be divided into two groups according to their present status. The origin of all mires is minerogenous. A mire may change to ombrotrophic when the Sphagnum peat thickens so that groundwater flow cannot feed the vegetation. As a result of nutrient supply, virgin minerotrophic mires (fens) are more fertile than virgin ombrotrophic mires (bogs). Groundwater level is an important control of the aerobic/anaerobic conditions in peat, and hence, the microbiological processes producing and consuming CO2, CH4, and N2O.
Source-to-sink system for peat accumulation in marginal basins of the South China Sea with the Qiongdongnan Basin as an example
Published in Australian Journal of Earth Sciences, 2021
Z.-X. Li, Y. Li, D.-D. Wang, P.-L. Wang, G.-C. Zhang, H.-Y. Liu, Y. Liu, X.-J. Li, G.-Z. Song
The dynamic conditions under which peat mire was destroyed by sudden floods were caused by abnormal climate changes, river diversions or breaches, peat mire near the shore, stormy flow damage, mudslides, etc. (Hu et al.,1998; Kreisa & Bambach, 1982). In terms of peat drift and sedimentation, the ‘canals’ that dispersed peat included channels, jets, tides, waves, coastal currents and special event flows such as storm recirculation.