Plankton Investigation in Inlet Waters Along the Coast of Japan. -V. The Plankton of Hirosima Bay in the Seto-Naikai (Inland Sea)-

Yamazi, Isamu

doi:10.5134/174672

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The common occurrence of Oithona species, especially O. davisae and O. similis, in our sampling areas also agrees with other reports (e.g., Yamazi, 1952;Itoh et al, 2011;Nishibe et al, 2016).…”

Section: Discussionsupporting

confidence: 93%

“…The precise taxonomy of this species is still in debate, with 'major' and 'minor' morphological forms described by earlier investigator (e.g., Hirota, 1964), and more recent genetic analysis has suggested a P. parvus species complex in Japanese water that comprises of multiple species (Hidaka et al, 2016). This species sensu lato was abundant in Seto Inland Sea in our study, similar to previous reports (Yamazi, 1952;Hirota, 1969). It was relatively rare in Otsuchi Bay in May, but became a noticeable component of the calanoid community in July, as it has been observed by others (Nishibe et al, 2016).…”

Section: Discussionsupporting

confidence: 89%

See 1 more Smart Citation

Dead heat: copepod carcass occurrence along the Japanese coasts and implications for a warming ocean

Tang

Ivory

Shimode

et al. 2019

ICES Journal of Marine Science

View full text Add to dashboard Cite

Understanding global warming effects on marine zooplankton is key to proper management of marine resources and fisheries. This is particularly urgent for Japan where the coastal water temperature has been increasing faster than the global average over the past decade. Conventional sampling and monitoring programmes, by ignoring the in situ vital status of the zooplankton, produce incomplete information about the state of the ecosystem. We showed that marine copepod carcasses were ubiquitous along a latitudinal gradient of 34–39°N of the Japanese coasts. On average, 4.4–18.1% of the individuals of the main copepod genera (Acartia, Paracalanus, Oithona, and Pseudocalanus) were carcasses, equivalent to 19–250 µg C m−3. Higher fractions of dead copepods tended to occur at higher water temperatures, implicating temperature-dependent non-predation mortality. Carcass occurrence may represent a loss of copepod production for the traditional predation-based food chain. On average, 49.5% of the carcass carbon would be remineralized in the water column via bacteria respiration, with the remainder potentially exported to the seafloor. Continuous warming in the Japanese coasts is expected to accelerate non-predation copepod mortality, with unknown consequences for the local marine food web.

show abstract

Section: Discussionsupporting

confidence: 93%