Combined effects of temperature, irradiance and pH on Teleaulax amphioxeia (Cryptophyceae) physiology and feeding ratio for its predator Mesodinium rubrum (Ciliophora).

07:00 EST 13th February 2020 | BioPortfolio

Summary of "Combined effects of temperature, irradiance and pH on Teleaulax amphioxeia (Cryptophyceae) physiology and feeding ratio for its predator Mesodinium rubrum (Ciliophora)."

The cryptophyte Teleaulax amphioxeia is a source of plastids for the ciliate Mesodinium rubrum and both organisms are members of the trophic chain of several species of Dinophysis. It is important to better understand the ecology of organisms at the first trophic levels before assessing the impact of principal factors of global change on Dinophysis spp. Therefore, combined effects of temperature, irradiance and pH on growth rate, photosynthetic activity and pigment content of a temperate strain of T. amphioxeia were studied using a full factorial design (central composite design 2 ) in 17 individually controlled bioreactors. The derived model predicted an optimal growth rate of T. amphioxeia at a light intensity of 400 µmol photons · m · s , more acidic pH (7.6) than the current average and a temperature of 17.6°C. An interaction between temperature and irradiance on growth was also found, while pH did not have any significant effect. Subsequently, to investigate potential impacts of prey quality and quantity on the physiology of the predator, M. rubrum was fed two separate prey: predator ratios with cultures of T. amphioxeia previously acclimated at two different light intensities (100 and 400 µmol photons · m · s ). M. rubrum growth appeared to be significantly dependant on prey quantity while effect of prey quality was not observed. This multi-parametric study indicated a high potential for a significant increase of T. amphioxeia in future climate conditions but to what extent this would lead to increased occurrences of Mesodinium spp. and Dinophysis spp. should be further investigated.


Journal Details

This article was published in the following journal.

Name: Journal of phycology
ISSN: 1529-8817


DeepDyve research library

PubMed Articles [19495 Associated PubMed Articles listed on BioPortfolio]

Effects of high light and temperature on Microcystis aeruginosa cell growth and β-cyclocitral emission.

Cyanobacteria always massively grow and even occur blooms in summer, with releasing amount of β-cyclocitral. To uncover the effects of summer high irradiance and temperature on cyanobacterial growth ...

Responses of marine phytoplankton communities to environmental changes: New insights from a niche classification scheme.

Predicting changes of phytoplankton communities in response to global warming is one of the challenges of ecological forecasting. One of the constraints is the paucity of general principles applicable...

Compilation and spatio-temporal analysis of publicly available total solar and UV irradiance data in the contiguous United States.

Skin cancer is the most common type of cancer in the United States, the majority of which is caused by overexposure to ultraviolet (UV) irradiance, which is one component of sunlight. National Environ...

The effects of UVB irradiance on vitiligo phototherapy and UVB-induced photocarcinogenesis.

Phototherapy is the most commonly used modality for repigmenting vitiligo. Currently, UVB emitting devices, including narrow band UVB (NBUVB) and excimer laser/light, are considered as the treatment o...

Temperature affects sound production in fish with two sets of sonic organs: The Pictus cat.

Sound communication is affected by ambient temperature in ectothermic animals including fishes. The present study examines the effects of temperature on acoustic signaling in a fish species possessing...

Clinical Trials [4377 Associated Clinical Trials listed on BioPortfolio]

Randomized Comparison of Low and Conventional Irradiance PDT for Skin Cancer

This study aims to examine whether the pain of topical photodynamic therapy (PDT) is significantly different when using low irradiance ambulatory light emitting diode (LED) devices compare...

A Trial of the Irradiance Level of Phototherapy for Neonatal Jaundice

The aim of this trial is to show that the low irradiance level is not worse than the high irradiance level in the phototherapy for neonatal jaundice.

BiLirubin Decrease Under Phototherapy Exposure in the Preterm Newborn in Incubator

Phototherapy is routinely used in neonatal intensive care units for the treatment of jaundice. Guidelines focus mainly on bilirubin serum levels to start the phototherapy. Only few data ar...

An Open Label, Phase II Trial of Continuous Low-Irradiance Photodynamic Therapy (CLIPT) Using Verteporfin (Visudyne®) for the Treatment of Cutaneous Metastases of Breast Cancer

The purpose of this Phase II study is to evaluate the efficacy and safety of Continuous Low- Irradiance Photodynamic Therapy (CLIPT) when used with Verteporfin in the treatment of cutaneou...

The Effects of Ambient Temperature and Forced-air Warming on Intraoperative Core Temperature

The purpose of this study is to determine: 1. the effect of ambient temperature on the rate of core temperature change from 1 to 3 hours after induction of anesthesia (linear phase...

Medical and Biotech [MESH] Definitions

Measurement of the temperature of a material, or of the body or an organ by various temperature sensing devices which measure changes in properties of the material that vary with temperature, such as ELASTICITY; MAGNETIC FIELDS; or LUMINESCENCE.

Group of rare congenital disorders characterized by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels. It is inherited as an X-linked or autosomal recessive defect. Mutations occurring in many different genes cause human Severe Combined Immunodeficiency (SCID).

Vinblastine derivative with antineoplastic activity against CANCER. Major side effects are myelosuppression and neurotoxicity. Vindesine is used extensively in chemotherapy protocols (ANTINEOPLASTIC COMBINED CHEMOTHERAPY PROTOCOLS).

Technique for limiting use, activity, or movement by immobilizing or restraining animal by suspending from hindlimbs or tails. This immobilization is used to simulate some effects of reduced gravity and study weightlessness physiology.

A medical-surgical specialty concerned with the physiology and disorders primarily of the female genital tract, as well as female endocrinology and reproductive physiology.

Quick Search

DeepDyve research library

Searches Linking to this Article