Abundance and biomass of mesozooplankton along north-south transects (165ﾟE and 165ﾟW) in summer in the North Pacific : an analysis with an optical plankton counter

スポンサーリンク

概要

• 論文の詳細を見る

• Zooplankton abundance and biomass along 165°E and 165°W in the North Pacific were estimated using an optical plankton counter on preserved samples collected with a plankton net of 335 μm mesh-size from 0–150 m at 89 stations from the subarctic to subtropical regions during the summers of 2003–2006; the stations were grouped into subarctic (SA), transitional (TR) and subtropical (ST) regions for latitudinal comparisons. The two-way ANOVA and a post hoc test showed that total abundance and biomass were significantly larger in SA and smaller in ST stations, respectively, than in the other regions, but were not significantly different between 165°E and 165°W. Total ranges of abundance and biomass were: 34×103–65×103 indiv. m−2 and 2.9–7.9 g dry mass m−2, respectively. The variation in abundance was mainly governed by the variation of 0.34–1.00 mm equivalent spherical diameter (ESD) size class zooplankton, but total biomass variations were due mainly to the 2.00–3.00 mm ESD size class, which corresponds to the calanoid copepod Neocalanus spp. copepodid stage 5 (C5) that had a greater abundance in SA and TR than in ST. Despite possibly higher abundances of Neocalanus C5 in TR than in SA, abundance and biomass of the 2.00–3.00 mm ESD size class were not significantly different between the two regions. Size reduction of individuals due to higher temperatures in TR than in SA may be a possible explanation.

• 日本プランクトン学会、日本ベントス学会の論文
• 2010-11-01

著者

• Yamaguchi Atsushi

  Hokkaido Univ. Hokkaido Jpn

• Yamaguchi Atsushi

  Laboratory Of Marine Biodiversity Graduate School Of Fisheries Sciences Hokkaido University

• MATSUNO KOHEI

  Laboratory of Marine Biology, Graduate School of Fisheries Science, Hokkaido University

• Matsuno Kohei

  Laboratory Of Marine Biology Graduate School Of Fisheries Sciences Hokkaido University

• Matsuno Kohei

  Laboratory Of Marine Biology Graduate School Of Fisheries Science Hokkaido University

関連論文

• Causes of under- or overestimation of zooplankton biomass using Optical Plankton Counter (OPC) : effect of size and taxa
• Abundance and community structure of chaetognaths from the epipelagic through abyssopelagic zones in the western North Pacific and its adjacent seas
• Lethality of Increasing CO_2 Levels on Deep-Sea Copepods in the Western North Pacific
• Latitudinal Differences in the Planktonic Biomass and Community Structure Down to the Greater Depths in the Western North Pacific
• Abundance, biomass and life cycle patterns of euphausiids (Euphausia pacifica, Thysanoessa inspinata and T. longipes) in the Oyashio region, western subarctic Pacific
• Abundance and biomass of mesozooplankton along north-south transects (165ﾟE and 165ﾟW) in summer in the North Pacific : an analysis with an optical plankton counter
• Horizontal distribution of calanoid copepods in the western Arctic Ocean during the summer of 2008
• Interannual and latitudinal changes in zooplankton abundance, biomass and size composition along a central North Pacific transect during summer : analyses with an Optical Plankton Counter
• Year-to-year changes of the mesozooplankton community in the Chukchi Sea during summers of 1991, 1992 and 2007, 2008

スポンサーリンク