Effects of ultraviolet radiation on the growth, reproduction and survival of the lobate ctenophore Mnemiopsis leidyi in Chesapeake Bay

Rathjen, Kristen; Breitburg, Denise L.; Neale, Patrick J.

doi:10.1016/j.jembe.2012.06.029

Cited by 4 publications

(3 citation statements)

References 37 publications

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“…In estuaries, absorption of UV radiation and PAR photochemically bleaches CDOM, transforming this complex mixture of organic compounds as it passes from terrestrial sources to the coastal ocean and beyond (Moran et al ; Bauer et al ). Water transparency to both the UV and PAR is important to many other estuarine processes, such as the survival of viruses, bacteria and other pathogens (Chatila et al ), toxicity of pollutants (Weinstein and Diamond ), and vertical distribution and mortality of various classes of zooplankton (Browman et al ; Rathjen et al ).…”

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confidence: 99%

Patterns of spectral, spatial, and long‐term variability in light attenuation in an optically complex sub‐estuary

Rose

Neale

Tzortziou

et al. 2018

Limnology & Oceanography

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The attenuation of solar radiation controls many processes and characteristics of aquatic ecosystems and is a sentinel of larger-scale environmental change. While light attenuation is often characterized with a single broadband diffuse attenuation coefficient of photosynthetically active radiation (K d PAR), attenuation can exhibit substantial variability across the solar spectrum and through time and space. Understanding this variability and its proximate causes may provide information to characterize large-scale environmental change. We implemented a semi-analytical K d model in four segments of the Rhode River sub-estuary of the Chesapeake Bay to examine spectral, spatial, and temporal variability in K d across the ultraviolet (UV) to PAR wavelengths (290-710 nm) over the period 1986-2014. We used this model to identify wavelengths most sensitive to long-term change, the seasonal phenology of long-term change, and the optical constituents driving changes. The model included contributions by phytoplankton, non-algal particulates, chromophoric dissolved organic matter (CDOM), and water. Over the period of record, K d increased (water transparency decreased) in both UV and PAR wavelengths, with the largest increases at the most upstream site, during summer months, and at short UV wavelengths. These increases were due primarily to an increase in non-algal particulates, and particularly since year 2005, however there was substantial seasonality in K d . The model reveals how different changes in water quality have a differential effect on UV and PAR attenuation, and enables insight into what types of long-term change in transparency have occurred over the long period of human impacts in the Chesapeake Bay watershed.

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confidence: 99%

Patterns of spectral, spatial, and long‐term variability in light attenuation in an optically complex sub‐estuary

Rose

Neale

Tzortziou

et al. 2018

Limnology & Oceanography

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“…Given the importance of gelatinous zooplankton for global biogeochemistry and the direct impacts of blooms on ecosystem dynamics and human activities, examining the presence of viruses in ctenophores addresses an important knowledge gap. A great deal of previous research has examined the conditions that favor ctenophore growth and reproductive success (Purcell et al, 2001 ; Costello et al, 2012 ; McNamara et al, 2014 ; Robinson and Graham, 2014 ; Gambill et al, 2015 ; Jaspers et al, 2015 ); however, significantly less attention has been given to factors that contribute to bloom demise (Rathjen et al, 2012 ). Both physical (low salinity, thermal stress, intertidal stranding) and biological (parasite infestation, disease, senescence following spawning, predation, food limitation) parameters have been frequently cited in jellyfish bloom demise (Pitt et al, 2014 ); however, no studies have directly investigated ctenophore bloom termination.…”

Section: Resultsmentioning

confidence: 99%

Discovery, Prevalence, and Persistence of Novel Circular Single-Stranded DNA Viruses in the Ctenophores Mnemiopsis leidyi and Beroe ovata

et al. 2015

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Gelatinous zooplankton, such as ctenophores and jellyfish, are important components of marine and brackish ecosystems and play critical roles in aquatic biogeochemistry. As voracious predators of plankton, ctenophores have key positions in aquatic food webs and are often successful invaders when introduced to new areas. Gelatinous zooplankton have strong impacts on ecosystem services, particularly in coastal environments. However, little is known about the factors responsible for regulating population dynamics of gelatinous organisms, including biological interactions that may contribute to bloom demise. Ctenophores are known to contain specific bacterial communities and a variety of invertebrate parasites and symbionts; however, no previous studies have examined the presence of viruses in these organisms. Building upon recent studies demonstrating a diversity of single-stranded DNA viruses that encode a replication initiator protein (Rep) in aquatic invertebrates, this study explored the presence of circular, Rep-encoding single-stranded DNA (CRESS-DNA) viruses in the ctenophores Mnemiopsis leidyi and Beroe ovata collected from the Skidaway River Estuary and Savannah River in Georgia, USA. Using rolling circle amplification followed by restriction enzyme digestion, this study provides the first evidence of viruses in ctenophores. Investigation of four CRESS-DNA viruses over an 8-month period using PCR demonstrated temporal trends in viral prevalence and indicated that some of the viruses may persist in ctenophore populations throughout the year. Although future work needs to examine the ecological roles of these ctenophore-associated viruses, this study indicates that viral infection may play a role in population dynamics of gelatinous zooplankton.

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“…As turbidity increases, PAR attenuates more rapidly, limiting the depth of PAR penetration. This light limitation can lead to successive effects, including lowering benthic and pelagic primary productivity of phototrophic algae and aquatic plants, changing the vertical distribution of phototaxic organisms (those who can move through the water column to find a suiTable PAR level) like zooplankton and other mobile species, shortening range of visibility, and altering predator and prey relationships (Cloern 1999;Vogel and Beauchamp 1999;Browman et al 2000;Gallegos 2001;Ralph et al 2007;Kirk 2010;Rathjen et al 2012).…”

Section: Introductionmentioning

confidence: 99%

A Simple Approach to Modeling Light Attenuation in the Sacramento–San Joaquin Delta Using Commonly Available Data

Richardson,

Bouma-Gregson,

O’Donnell

et al. 2023

SFEWS

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The diffuse attenuation coefficient of photosynthetically active radiation (KdPAR) is commonly used to predict light attenuation in aquatic productivity models, but obtaining measurements of PAR to compute KdPAR is difficult. In situ calculations of KdPAR require multiple measurements of PAR through the water column, and these measurements are infeasible for real-time recording. Instead, predictive models using surface-water measurements may be used. Traditional KdPAR models are based on open-ocean habitats and rely on chlorophyll—as a proxy measurement for phytoplankton abundance—as the main predictive parameter. However, elevated suspended sediments and dissolved organic materials may also affect KdPAR values of inland water bodies and estuaries. In this study, we leverage KdPAR calculations derived from in situ light measurements collected along with surface-water-quality parameters across the Sacramento-San Joaquin River Delta in California, USA (the Delta). Sampling occurred between January of 2013 and May of 2014. We also explored regional and seasonal effects, but these did not clearly affect the model. Ultimately, the best-performing model included surface-level turbidity only (R2 = 0.91). The simplicity of the model facilitates use of KdPAR estimates for a variety of purposes throughout the Delta, including euphotic depth calculations, and as inputs to primary-productivity and habitat-suitability models. We demonstrate the model’s usability with two open-sources data sets (one spatially dense, and one temporally dense), and estimate KdPAR, euphotic depth, and primary productivity within the Delta. We provide calculations for each estimation, allowing users to easily adopt these models and apply them to their own data or with open-sourced data, which are abundant.

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Effects of ultraviolet radiation on the growth, reproduction and survival of the lobate ctenophore Mnemiopsis leidyi in Chesapeake Bay

Cited by 4 publications

References 37 publications

Patterns of spectral, spatial, and long‐term variability in light attenuation in an optically complex sub‐estuary

Patterns of spectral, spatial, and long‐term variability in light attenuation in an optically complex sub‐estuary

Discovery, Prevalence, and Persistence of Novel Circular Single-Stranded DNA Viruses in the Ctenophores Mnemiopsis leidyi and Beroe ovata

A Simple Approach to Modeling Light Attenuation in the Sacramento–San Joaquin Delta Using Commonly Available Data

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