Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.envpol.2013.07.017
Titel (primär) Biogeochemistry and community ecology in a spring-fed urban river following a major earthquake
Autor Wells, N.S.; Clough, T.J.; Condron, L.M.; Baisden, W.T.; Harding, J.S.; Dong, Y.; Lewis, G.D.; Lear, G.
Quelle Environmental Pollution
Erscheinungsjahr 2013
Department CATHYD
Band/Volume 182
Seite von 190
Seite bis 200
Sprache englisch
Keywords Stream biofilm; Stable isotopes; Sewage contamination; Liquefaction; Natural disaster recovery
UFZ Querschnittsthemen RU2;

In February 2011 a MW 6.3 earthquake in Christchurch, New Zealand inundated urban waterways with sediment from liquefaction and triggered sewage spills. The impacts of, and recovery from, this natural disaster on the stream biogeochemistry and biology were assessed over six months along a longitudinal impact gradient in an urban river. The impact of liquefaction was masked by earthquake triggered sewage spills (∼20,000 m3 day−1 entering the river for one month). Within 10 days of the earthquake dissolved oxygen in the lowest reaches was <1 mg l−1, in-stream denitrification accelerated (attenuating 40–80% of sewage nitrogen), microbial biofilm communities changed, and several benthic invertebrate taxa disappeared. Following sewage system repairs, the river recovered in a reverse cascade, and within six months there were no differences in water chemistry, nutrient cycling, or benthic communities between severely and minimally impacted reaches. This study highlights the importance of assessing environmental impact following urban natural disasters.

dauerhafte UFZ-Verlinkung
Wells, N.S., Clough, T.J., Condron, L.M., Baisden, W.T., Harding, J.S., Dong, Y., Lewis, G.D., Lear, G. (2013):
Biogeochemistry and community ecology in a spring-fed urban river following a major earthquake
Environ. Pollut. 182 , 190 - 200 10.1016/j.envpol.2013.07.017