Journal
MARINE ENVIRONMENTAL RESEARCH
Volume 136, Issue -, Pages 27-37Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2018.02.007
Keywords
Eutrophication; Ecosystem management; Dissolved oxygen; Sulphide; Macrozoobenthic community; Polychaete; Sediment; Coastal zone; Tokyo Bay
Funding
- NIES research project from National Institute for Environmental Studies (NIES)
- KAKENHI from JSPS [21770013, 17K07580]
- Grants-in-Aid for Scientific Research [21770013, 17K07580] Funding Source: KAKEN
Ask authors/readers for more resources
Ecological thresholds of dissolved oxygen (DO) and sedimentary hydrogen sulfide (H2S) for macrozoobenthos were examined during a 30-month monitoring of two stations in a highly eutrophic canal in inner Tokyo Bay, Japan. Bottom DO and H2S concentrations fluctuated seasonally, and were significantly correlated with water and sediment temperatures. Red tide-derived phytodetritus was a major source of sediment organic matters in the canal bottom, and the sediment became highly reduced and sulfidic condition in wanner months (sedimentary H2S; up to 8.5 mM). Dominant opportunistic taxa, including polychaetes and arnphipods, were eliminated under low DO and high H2S conditions (i.e., population thresholds), and devastation of community structure occurred at 2.4-3.3 mg l(-1) DO and 1.8-2.7 mM H2S (i.e., community thresholds). To maintain ecosystem function in anthropogenically degraded habitats and ensure colonization by macrozoobenthos throughout the year, DO and H2S levels should be maintained below these thresholds.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available