Ecological shifts due to anthropogenic activities in the coastal seas of the Seto Inland Sea, Japan, since the 20th century

Toshiaki Irizuki, Kotaro Hirose, Yukari Ueda, Yuki Fujihara, Hiroaki Ishiga, Koji Seto

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Multiproxy analyses were conducted using sediment cores in a low-polluted coastal site (Hiuchi-nada) in the Seto Inland Sea (SIS), Japan. Heavy metal and organic pollution peaked in the 1960s and the bottom environments have ameliorated since the 1980s due to several environmental regulations. First ecological shifts in meiobenthic ostracodes and diatoms occurred in the 1960s due to the initiation of eutrophication. Then, a second ecological shift occurred in the 1980s due to the amelioration of the water and the bottom quality. A compilation of similar analytical results in the coastal seas of the SIS reveals three types of ecological and environmental history since the 20th century. The environmental improvement since the 1980s affects the ecosystems, in particular, in a low-polluted bay. However, ecological compositions are different from those prior to the 1960s, suggesting that the ecosystem was not recovered but changed into the next stage in the SIS.

Original languageEnglish
Pages (from-to)637-653
Number of pages17
JournalMarine Pollution Bulletin
Volume127
DOIs
Publication statusPublished - 2018 Feb

Keywords

  • Diatom
  • Ecosystem
  • Heavy metal pollution
  • Organic pollution
  • Ostracoda
  • Seto Inland Sea

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Pollution

Fingerprint Dive into the research topics of 'Ecological shifts due to anthropogenic activities in the coastal seas of the Seto Inland Sea, Japan, since the 20th century'. Together they form a unique fingerprint.

Cite this