Patterns of Reproduction in Ostracodes: A Review

Cohen, Anne C.; Morin, James G.

doi:10.2307/1548480

Cited by 129 publications

(102 citation statements)

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“…In cooler climates it is necessary to overcome subzero temperatures during the cold season and this can result in seasonally low abundances (Horne, 1983;Cohen and Morin, 1990). This is not the case in warm regions like Florida or Guatemala.…”

Section: Reconstruction Of C Ilosvayi Calcification Timesmentioning

confidence: 99%

“…They molt up to eight times before they reach their adult stage. The molting periods of the single stages can be restricted to certain time periods within populations, resulting in species-specific annual population structures (Cohen and Morin, 1990). Known life cycles include seasonal cycles, multiple molting periods with or without overlapping generations, and nonseasonal continuous life cycles (Cohen and Morin, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…The molting periods of the single stages can be restricted to certain time periods within populations, resulting in species-specific annual population structures (Cohen and Morin, 1990). Known life cycles include seasonal cycles, multiple molting periods with or without overlapping generations, and nonseasonal continuous life cycles (Cohen and Morin, 1990). In temperate and boreal regions, temperature is regarded as the main abiotic factor controlling seasonal ostracod population dynamics (Horne, 1983;Cohen and Morin, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…Known life cycles include seasonal cycles, multiple molting periods with or without overlapping generations, and nonseasonal continuous life cycles (Cohen and Morin, 1990). In temperate and boreal regions, temperature is regarded as the main abiotic factor controlling seasonal ostracod population dynamics (Horne, 1983;Cohen and Morin, 1990). This may be of minor importance in tropical and subtropical regions where temperatures remain comparably high during the whole year, but other factors like variation in food supply, water conditions, or competition that are linked to other abiotic variables have also been suggested to influence the periodicity of ostra-cods (Horne, 1983;Kamiya, 1988;Martens, 1985).…”

Section: Introductionmentioning

confidence: 99%

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Modeling calcification periods of <i>Cytheridella ilosvayi</i> from Florida based on isotopic signatures and hydrological data

Meyer

Wrozyna

Leis³

et al. 2017

Biogeosciences

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Abstract. The isotopic signatures of ostracod shells are the result of the temperature and composition of their host water and the phenology and ecology of the target species. Investigations addressing the influence of site-specific environmental variations on the isotopic ranges of ostracod shells are still rare but can provide important information on habitatdependent variations and may signify a seasonally restricted timing of calcification periods. Here we present isotopic signatures (δ 18 O ostr , δ 13 C ostr ) of living Cytheridella ilosvayi (Ostracoda) and physical, chemical, and isotopic (δD, δ 18 O water , δ 13 C DIC ) compositions of 14 freshwater habitats (rivers, lakes, canals, marshes, sinkholes) in South Florida from winter 2013 and summer 2014. We also present instrumental data of river temperatures and δ 18 O of precipitation (δ 18 O prec ) from this region. The physicochemical and isotopic compositions of the selected sites characterize the different habitats and show the influence of the source water, biological activity, and duration of exposure to the surface. Mean δ 18 O ostr and δ 13 C ostr signatures of C. ilosvayi shells correlate well with the isotopic composition of their host waters. Within-sample variabilities in repeated isotopic measurements of single ostracod shells reflect habitat-dependent ranges. The similarly high range of ostracod δ 18 O in rivers and one marsh sample indicates that both temperature and δ 18 O prec are responsible for their variation in the whole study area. Rivers and canals, which are predominantly influenced by the input and mixing of inorganic carbon from the catchment, show smaller δ 13 C ostr ranges than the marsh dominated by local fluctuations in biological activities.Based on these observations, background data of water temperatures and δ 18 O prec were used to calculate monthly δ 18 O variations in a theoretical calcite formed in rivers in Florida assuming a direct reaction on precipitation changes.The calculated values showed a high variation coupled with low mean values during the summer wet season, while during the winter dry season the variation remains small and mean values increased. Inferred configurations were used to approximate possible calcification periods of C. ilosvayi. For a plausible calcification period, mean values and ranges of δ 18 O ostr had to be equal to the theoretical calcite with a slight positive offset (vital effect). The applied model suggests a seasonal calcification period of C. ilosvayi in early spring that is probably coupled to the hydrologic cycle of Florida.

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Section: Reconstruction Of C Ilosvayi Calcification Timesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling calcification periods of <i>Cytheridella ilosvayi</i> from Florida based on isotopic signatures and hydrological data

Meyer

Wrozyna

Leis³

et al. 2017

Biogeosciences

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“…In the present study, it was observed that Fabaeformiscandona holzkampfi was represented only in Winter and Spring, while the other seven species were represented during all seasons. Cohen & Morin (1990) recorded that peak numbers usually occur in warm seasons and only occasionally in late fall or Winter. On the contrary, Rieradevall & Roca (1995) observed that Candona negkcta and Darwinula stevensoni showed a tendency towards maximum densities when temperature were low, while other species such as Isocypris beauchampi, Cypridies torosa and Cyclocypris ovum seem to tolerate warmer water.…”

Section: -The Relative Density Of Cypridopsis Vidua Was Negativelymentioning

confidence: 99%

Ecology of Eight Species of Freshwater Ostracods (Crustacea) From Qena Governorate, Upper Egypt

Hussein

Obuid-AIlah

Mahmoud

et al. 2004

Egypt. J. of Aquatic Biolo. and Fish.

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T he present work deals with the ecology of eight species of freshwater ostracods (Cypridopsis vidiui, Potamocypris variegattf. Hemicypris dematomarginata, llyocypris gibha, Uyocypris hiplicata, Fabaeformisccmdona holzkampfu Pseudocandona semicognita and Limnocythere inopinata) collected from Qena Govemorate. Monthly samples were collected for a period of one year (from July, 2000 till June, 2001) from four sites. Some ecological factors were measured during the period of investigation and correlated with the density of the ostracod species studied. Statistical analysis was performed by using SPSS software package (version 9) and the model equations controlling the density and the physical factors measured for the studied species were deduced.

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Sedimente als Lebensraum

Traunspurger

Höss

2004

Handbuch Angewandte Limnologie: Grundlagen - Gewässerbelastung - Restaurierung - Aquatische Ökotoxikologie - Bewertung - Gewäss

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Patterns of Reproduction in Ostracodes: A Review

Cited by 129 publications

References 0 publications

Modeling calcification periods of <i>Cytheridella ilosvayi</i> from Florida based on isotopic signatures and hydrological data

Modeling calcification periods of <i>Cytheridella ilosvayi</i> from Florida based on isotopic signatures and hydrological data

Ecology of Eight Species of Freshwater Ostracods (Crustacea) From Qena Governorate, Upper Egypt

Sedimente als Lebensraum

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Patterns of Reproduction in Ostracodes: A Review

Cited by 129 publications

References 0 publications

Modeling calcification periods of &lt;i&gt;Cytheridella ilosvayi&lt;/i&gt; from Florida based on isotopic signatures and hydrological data

Modeling calcification periods of &lt;i&gt;Cytheridella ilosvayi&lt;/i&gt; from Florida based on isotopic signatures and hydrological data

Ecology of Eight Species of Freshwater Ostracods (Crustacea) From Qena Governorate, Upper Egypt

Sedimente als Lebensraum

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Modeling calcification periods of <i>Cytheridella ilosvayi</i> from Florida based on isotopic signatures and hydrological data

Modeling calcification periods of <i>Cytheridella ilosvayi</i> from Florida based on isotopic signatures and hydrological data