Dynamics and functions of wetlands in different hydrological basins and landscapes
2012 (English)In: SAO/NASA ADS Physics Abstract Service, 2012Conference paper (Refereed)
AbstractThis paper presents and synthesizes regional investigations of wetlands, and their change dynamics and ecosystem services as elements of hydrological basins in different types of landscapes. Starting from the Arctic, thermokarst lakes and wetlands represent here primary change responders to permafrost degradation caused by recent warming. To assess such change responses, in terms of the presence and distribution of thermokarst lakes and wetlands, we have used remotely sensed imagery in conjunction with long-term, catchment-wise water balance analysis of the Nadym and Pur river basins in Western Siberia, identifying hydrological change indicators of thermokarst lake-wetland responses to permafrost thawing. With regard to lake size and size distribution, we found that lakes-wetlands of or smaller than ~50 ha have decreased more than larger lakes over the period 1987-2010. Continuing further south to Swedish hydrological basins with major contributions to water quality changes in the Baltic Sea, wetland and lake systems represent here potential regulators of such changes, providing opportunities for basin-scale nutrient and pollutant load abatement. To assess these opportunities, we have investigated nutrient loads from the main Norrström basin and surrounding smaller catchments within the Swedish water management district Northern Baltic Proper, and heavy metal loading from the Dalälven River basin and its major mining areas. Results quantify wetland potential for reducing expected basin-scale loads, as well as reducing uncertainty in and cost of load abatement, and emphasize some main research questions for further investigation regarding this potential and the possibilities to realize it in different hydrological catchments
Place, publisher, year, edition, pages
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:su:diva-86549OAI: oai:DiVA.org:su-86549DiVA: diva2:587290
American Geophysical Union Fall Meeting 2012, San Francisco, USA, 3-7 December, 2012.
Abstract: H53O-07, Invited2013-01-142013-01-142014-11-04Bibliographically approved