Long-term investigation of the distribution of Eurytemora affinis (Calanoida; Copepoda) in the Elbe Estuary

Peitsch, Andrea; Köpcke, B.; Bernát, Nikolaus

doi:10.1016/s0075-9511(00)80013-4

Cited by 25 publications

(12 citation statements)

References 23 publications

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“…Population growth and egg production in copepods are dependent on food resources, and population size may be impaired by mortality (i.e., predation) (Heinle et al 1977;Plourde and Runge 1993;Peitsch et al 2000).…”

Section: Effect Of the Invasion On Individual Zooplankton Speciesmentioning

confidence: 99%

Invasion of an estuarine transition zone by Dreissena polymorpha veligers had no detectable effect on zooplankton community structure

Winkler¹,

Sirois²,

Johnson³

et al. 2005

Can. J. Fish. Aquat. Sci.

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Large numbers of the filter-feeding larval stage of zebra mussels (Dreissena polymorpha) (veligers) have been advected into the estuarine transition zone (ETZ) of the St. Lawrence River. In 1994, they became the dominant member of the tidal freshwater zooplankton assemblage of the ETZ (and subsequently the true estuarine assemblage) during summer months. These changes in community structure have not, however, been reflected in changes in the abundance of preinvasion taxa. Abundance of potential planktonic competitors such as rotifers and the cladoceran Bosmina longirostris fluctuated between years but did not decline following the invasion. Only densities of the copepod Eurytemora affinis declined in 2000 and 2001, but this could not be definitively associated with the invasion. Synchronous variation among different zooplankton groups suggests that environmental forcing related to or correlated with temperature anomalies is the major cause of interannual variation in the abundance of zooplankton taxa. The negative correlation between veliger abundance and salinity indicates that the ETZ acts as a sink for the larval stages of the zebra mussel. Their precise fate remains uncertain, but our study suggests that this invasion has had little or no impact on this pelagic community in spite of the numerical dominance of veligers.Résumé : Un grand nombre de larves véligères à alimentation par filtration de la moule zébrée (Dreissena polymorpha) ont été entraînées par advection dans la zone de transition estuarienne (ZTE) du fleuve Saint-Laurent. En 1994, elles sont devenues l'élément dominant des peuplements intertidaux de zooplancton de la ZTE (pour former ensuite le véritable peuplement estuarien) durant les mois d'été. Cependant, ces changements de structure de communauté n'entraînent pas de changements d'abondance des taxons présents avant l'invasion. L'abondance des compétiteurs planctoniques potentiels, tels que les rotifères et le cladocère Bosmina longirostris, fluctue d'une année à l'autre, mais il n'y a pas eu de déclin après l'invasion. Seules les densités du copépode Eurytemora affinis ont diminué en 2000 et 2001, mais le déclin ne peut être clairement associé à l'invasion. L'existence de variations synchrones parmi les diffé-rents groupes du zooplancton laisse croire que le forçage environnemental associé aux anomalies de température, ou en corrélation avec elles, est la cause principale de la variation d'abondance des taxons du zooplancton. La corrélation né-gative entre l'abondance des véligères et la salinité indique que la ZTE agit comme un puits pour les stades larvaires de la moule zébrée. Leur sort exact reste incertain, mais notre étude laisse croire que cette invasion a eu peu ou pas d'impact sur la communauté pélagique, malgré la dominance numérique des véligères.[Traduit par la Rédaction] Winkler et al. 592

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Section: Effect Of the Invasion On Individual Zooplankton Speciesmentioning

confidence: 99%

Invasion of an estuarine transition zone by Dreissena polymorpha veligers had no detectable effect on zooplankton community structure

Winkler¹,

Sirois²,

Johnson³

et al. 2005

Can. J. Fish. Aquat. Sci.

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“…An adult female, 1.5 mm in length, is shown with a large egg sac. Photograph by Carol Eunmi Lee. zooplankton, forming enormous biomasses in estuaries of up to~2 9 10 6 individuals/m 3 and estimated census sizes in the billions (Heinle and Flemer 1975;Simenstad and Cordell 1985;Gulati and Doornekamp 1991;Morgan et al 1997;Peitsch et al 2000;Winkler et al 2005). This copepod is a dominant grazer of algae and major food source for some of the world's most important fisheries, such as herring, anchovy, salmon and flounder (Shaheen et al 2001;Viitasalo et al 2001;Winkler et al 2003;Kimmel et al 2006).…”

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confidence: 99%

Evolutionary mechanisms of habitat invasions, using the copepodEurytemora affinisas a model system

Lee

2015

Evolutionary Applications

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The study of the copepod Eurytemora affinis has provided unprecedented insights into mechanisms of invasive success. In this invited review, I summarize a subset of work from my laboratory to highlight key insights gained from studying E. affinis as a model system. Invasive species with brackish origins are overrepresented in freshwater habitats. The copepod E. affinis is an example of such a brackish invader, and has invaded freshwater habitats multiple times independently in recent years. These invasions were accompanied by the evolution of physiological tolerance and plasticity, increased body fluid regulation, and evolutionary shifts in ion transporter (V‐type H+ ATPase, Na+, K+‐ATPase) activity and expression. These evolutionary changes occurred in parallel across independent invasions in nature and in laboratory selection experiments. Selection appears to act on standing genetic variation during invasions, and maintenance of this variation is likely facilitated through ‘beneficial reversal of dominance’ in salinity tolerance across habitats. Expression of critical ion transporters is localized in newly discovered Crusalis leg organs. Increased freshwater tolerance is accompanied by costs to development time and greater requirements for food. High‐food concentration increases low‐salinity tolerance, allowing saline populations to invade freshwater habitats. Mechanisms observed here likely have relevance for other taxa undergoing fundamental niche expansions.

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“…E. affinis (~1 mm total length) is a dominant species in many temperate estuaries, usually inhabiting lowsalinity areas, and is often associated with the maximum turbidity zone (e.g. Hough & Naylor 1991, Peitsch et al 2000, David et al 2005). The copepod is also an important food source for macrozooplankton such as mysids and many estuarine-dependent fishes such as striped bass Morone saxatilis (Burkill & Kendall 1982, Meng & Orsi 1991, Thorp & Casper 2003.…”

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confidence: 99%

Mating success and its consequences for population growth in an estuarine copepod

Choi¹,

Kimmerer²

2009

Mar. Ecol. Prog. Ser.

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We conducted experiments on mating success of the estuarine copepod Eurytemora affinis in the San Francisco Estuary, USA. The experimental approach was to isolate virgin pairs (one male and one female) in containers varying in volume from 0.03 to 32 l for 2, 4, or 8 h. Mating was considered successful if viable eggs were produced by individual females subsequently incubated for up to 5 d. The experimental data were analyzed by fitting a 3-parameter model to the data to determine the volume search rate of males. Mating frequencies indicated a volume search rate for E. affinis males of 7.2 ± 4.0 l h -1 (172 ± 96 l d -1, 95% CL), about 20-fold higher than that for Acartia hudsonica previously determined by a similar method. A simple population model showed that the critical population density needed to maintain the E. affinis population can be well below the seasonally low abundance of this copepod in the San Francisco Estuary. The low critical density may allow population persistence in an estuary without the production of resting eggs. KEY WORDS: Copepod mating · Allee effects · Population growth · Volume search rate Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 377: [183][184][185][186][187][188][189][190][191] 2009 (Katona 1973, Griffiths & Frost 1976, van Leeuwen & Maly 1991, Yen et al. 1998. Increasing detection range increases the volume search rate, i.e. the volume searched by males for females per unit time (Kiørboe 2007), which, in turn, reduces the population density needed to prevent mate limitation (Choi & Kimmerer 2008).In the present study, we determined the volume search rate for males of the calanoid copepod Eurytemora affinis and assessed the consequences of this rate for population recovery from low abundance. E. affinis (~1 mm total length) is a dominant species in many temperate estuaries, usually inhabiting lowsalinity areas, and is often associated with the maximum turbidity zone (e.g. Hough & Naylor 1991, Peitsch et al. 2000, David et al. 2005). The copepod is also an important food source for macrozooplankton such as mysids and many estuarine-dependent fishes such as striped bass Morone saxatilis (Burkill & Kendall 1982, Meng & Orsi 1991, Thorp & Casper 2003. E. affinis is capable of producing resting eggs in response to environmental conditions such as temperature, photoperiod, and crowding (Ban & Minoda 1992, Ban 1992. Mating behavior and fertilization have been well documented (Heinle 1970, Katona 1973, Katona 1975. Mate finding in E. affinis is asymmetric in that the female produces a pheromone signal and searches primarily for food, whereas the male detects the pheromone and pursues the female (Katona 1973). It is not well understood, however, how this mating behavior relates to population growth (Kiørboe 2007) and, in particular, how dilute the population can become before it is unable to recover.In the San Francisco Estuary, Eurytemora affinis has historically been abundant and reproductively active throughout the year i...

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Long-term investigation of the distribution of Eurytemora affinis (Calanoida; Copepoda) in the Elbe Estuary

Cited by 25 publications

References 23 publications

Invasion of an estuarine transition zone by Dreissena polymorpha veligers had no detectable effect on zooplankton community structure

Invasion of an estuarine transition zone by Dreissena polymorpha veligers had no detectable effect on zooplankton community structure

Evolutionary mechanisms of habitat invasions, using the copepodEurytemora affinisas a model system

Mating success and its consequences for population growth in an estuarine copepod

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