Asian copepods on the move: recent invasions in the Columbia–Snake River system, USA

Cordell, Jeffrey; Bollens, Stephen M.; Draheim, Robyn; Sytsma, Mark D.

doi:10.1093/icesjms/fsm195

Cited by 70 publications

(70 citation statements)

References 12 publications

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“…Interestingly, this same pattern of summer dominance by invasive species has been previously noted for fish assemblages in the freshwater delta (Grimaldo et al 2004) as well as the brackish intertidal marshes of the SFE (Gewant & Bollens 2012). Moreover, we note that several of the invasive copepods present in this study have also invaded the Columbia River Estuary (Cordell et al 2008, Emerson et al 2014; thus, the implications of these invasions are far-ranging, and need to be better understood.…”

Section: Discussionsupporting

confidence: 87%

Zooplankton of tidal marsh channels in relation to environmental variables in the upper San Francisco Estuary

Bollens

Breckenridge²,

Cordell³

et al. 2014

Aquat. Biol.

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Zooplankton are important trophic intermediaries between aquatic primary producers and higher level consumers such as fish, but to date they have been little studied in intertidal marshes. This is particularly true in the San Francisco Estuary (SFE), which is heavily impacted by human activities and is being targeted for restoration of its native wetland communities. As part of a multi-year field study investigating wetland dynamics in the upper SFE, we conducted approximately quarterly sampling of the mesozooplankton (> 73 µm) at 3 channels in each of 6 marshes. Here, we describe seasonal and regional variation in the composition and abundance of zooplankton, and relate these to variations in environmental conditions. Cluster analysis identified 6 different marsh zooplankton communities. The 66 taxa identified included both native and non-indigenous species (NIS), with NIS being particularly dominant in the summer and autumn. Ordination analyses indicated that salinity, temperature, and other freshwater-related variables such as freshwater flow and distance to the coastal ocean were the strongest environmental drivers of marsh zooplankton community composition and individual abundance. Zooplankton communities in intertidal marshes were similar to those of open water habitats of the SFE in many regards, although differences in some taxa were observed, e.g. higher abundances of the copepod Eury temora affinis and lower abundances of tintinnid ciliates in the marshes. Apparent differences in zooplankton between intertidal marsh and open water habitats, and between different regions of the estuary, could have important implications for young fish and other consumers.

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Section: Discussionsupporting

confidence: 87%

Zooplankton of tidal marsh channels in relation to environmental variables in the upper San Francisco Estuary

Bollens

Breckenridge²,

Cordell³

et al. 2014

Aquat. Biol.

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“…Copepods are the most abundant representatives of zooplankton in ballast waters (Choi et al, 2005), and among them, P. marinus scores as one of the most frequent (Choi et al, 2005;Cordell et al, 2008;Lawrence & Cordell, 2010;Kasyan, 2010), as well as P. inopinus and P. forbesi (Cordell et al, 2007;Cordell et al, 2008). The invasion history of P. marinus, though, suggests aquaculture as additional vector of introduction (Fleminger & Hendrix-Kramer, 1988;De Olazabal & Tirelli, 2011), which increases the possibilities of this species to spread into new environments compared to P. inopinus and P. forbesi.…”

Section: Invasive and Non-invasive Congeneric Species: A Comparisonmentioning

confidence: 99%

Spreading factors of a globally invading coastal copepod

Sabia

Zagami²,

Mazzocchi

et al. 2015

Medit. Mar. Sci.

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The Mediterranean Sea is one of the most affected areas by alien invasions, which are continuously increasing due to the intense human activities and environmental changes that favor the introduction of species previously unable to colonize the basin. This is the case of the copepods of the genus Pseudodiaptomus, first described in the Indian Ocean and considered as one of the most resistant to unfavorable conditions but never recorded in the Mediterranean until 2011 though present in adjacent seas. Pseudodiaptomus marinus, in particular, is common in shallow marine-brackish waters and is one of the species often found in ballast waters and in aquaculture plants. Native of Japan, it has started spreading since 1950s, and its populations have established in several harbors, eutrophic inlets, and lagoons along the coasts of the Pacific and Indian Oceans. In the last few years, P. marinus has been increasingly reported in European Seas (Mediterranean Sea and North Sea).In this article, we review the invasion history of this species with a special emphasis on its records in the Mediterranean Sea, and its occurrence and establishment in Sicilian waters. We also compare the biological traits and population dynamics of P. marinus with those of other representative of the genus and discuss about the possible mechanisms of introduction in new environments. The aim of this work is to understand the reasons of successful invasion of P. marinus and the environmental and biological factors that may lead to its further biogeographic expansion.

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“…Intercontinental invasions of East Asian copepods have been well documented from the two large estuaries on the Pacific coast of the USA, i.e. San Francisco estuary of California and the Columbia River estuary of Oregon (Ferrari & Orsi 1984, Orsi & Ohtsuka 1999, Bollens et al 2002, Bouley & Kimmerer 2006, Cordell et al 2008. The alien species are presently the dominant zooplankton and have changed the food web in these estuaries (Cordell et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Zoogeography of planktonic brackish-water calanoid copepods in western Japan with comparison with neighboring Korean fauna

Sakaguchi

Ueda

Ohtsuka

et al. 2011

Plankton Benthos Res

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Brackish-water calanoid copepods, defined as those predominantly inhabiting oligo-and mesohaline waters, were investigated at 45 rivers in western Japan during 2006-2009 to review their faunas and, for comparison, 4 rivers of Korea in 2006. Eight species (Acartia ohtsukai, A. sinjiensis, A. tsuensis, Pseudodiaptomus inopinus, P. ishigakiensis, Sinocalanus sinensis, S. tenellus and Tortanus derjugini) were identified as brackish-water calanoid copepods from Japan. Among them, P. inopinus was most often collected; it occurred in 38 rivers. Acartia tsuensis and A. sinjiensis were also frequent species in Japan. Pseudodiaptomus ishigakiensis discovered from Kyushu Island is new to the mainland of Japan. From the rivers of Korea six species were identified (A. ohtsukai, A. sp., P. inopinus, P. sp., S. tenellus and T. dextrilobatus). Based on the present and previous studies, a total of 13 brackish-water calanoid copepods have been recorded from Japan and Korea, of which eight species, including three continental relicts (A. ohtsukai, S. sinensis and T. derjugini) in Kyushu Island, are common to both regions. Among them, only two species (P. inopinus and S. tenellus) are distributed widely on both Japanese and Korean coasts of the Tsushima (Korea) Strait. This indicates that the faunas of brackish-water calanoid copepods are very different between Japan and Korea despite the short geographical distance (about 170 km) and that the Tsushima Strait has played the role of an effective barrier for their dispersion.

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Asian copepods on the move: recent invasions in the Columbia–Snake River system, USA

Cited by 70 publications

References 12 publications

Zooplankton of tidal marsh channels in relation to environmental variables in the upper San Francisco Estuary

Zooplankton of tidal marsh channels in relation to environmental variables in the upper San Francisco Estuary

Spreading factors of a globally invading coastal copepod

Zoogeography of planktonic brackish-water calanoid copepods in western Japan with comparison with neighboring Korean fauna

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