Role of temperature in growth, feeding, and vertical distribution of the mixotrophic chrysophyte Dinobryon

Dinobryon spp. are common components of the phytoplankton in temperate lakes. While these chrysophytes link bacterial carbon as well as primary production to the larger food web, few studies have examined their vertical distribution over a season. Data were collected over a 2.5 yr period in mesotrophic Lake Lacawac in eastern Pennsylvania (USA) to examine water column attributes relating to seasonality of the mixotrophic alga D. cylindricum, and specifically to address a hypo thesis that abundance and vertical distribution in the genus are associated with temperature. This information was used to guide laboratory experiments examining temperature and light effects on growth, feeding, and vertical migration of cultured Dinobryon. Data from Lake Lacawac and the literature indicated that high abundances of Dinobryon were associated with a narrow range of temperature (9-18°C) relative to temperatures where they were present (3-26°C). High abundances of several species of Dynobryon were associated with this temperature range, and occurred from late winter to late spring, depending on latitude and depth in the water column. Although high Dinobryon abundances were not tied directly to levels of photosynthetically active radiation in Lake Lacawac, a UV-exclusion experiment in a nearby oligotrophic lake indicated a temperature-dependent negative effect of UV radiation. UV may limit the occurrence of Dinobryon populations in surface waters of clear oligotrophic lakes. Laboratory experiments showed that both light and temperature affected growth and feeding rates of Dinobryon, and that maximum feeding and growth rates occurred within the temperature range where high Dinobryon abundances were observed in field studies.

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Work Title Role of temperature in growth, feeding, and vertical distribution of the mixotrophic chrysophyte Dinobryon
Access
Open Access
Creators
  1. Adam W. Heinze
  2. Corinne L. Truesdale
  3. Sarah B. Devaul
  4. Jonathan Swinden
  5. Robert W. Sanders
Keyword
  1. Phytoplankton
  2. Lake bloom
  3. Succession
  4. Ultraviolet radiation
  5. Seasonality
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Aquatic Microbial Ecology
Publication Date December 16, 2013
Publisher Identifier (DOI)
  1. https://doi.org/10.3354/ame01673
Deposited March 07, 2024

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Version 1
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  • Created
  • Added a071p155-1.pdf
  • Added Creator Adam W. Heinze
  • Added Creator Corinne L. Truesdale
  • Added Creator Sarah B. Devaul
  • Added Creator Jonathan Swinden
  • Added Creator Robert W. Sanders
  • Published
  • Updated Keyword, Publisher, Description, and 1 more Show Changes
    Keyword
    • Phytoplankton, Lake bloom, Succession, Ultraviolet radiation, Seasonality
    Publisher
    • Marine Microbial Food Webs
    • Aquatic Microbial Ecology
    Description
    • Dinobryon spp. are common components of the phytoplankton in temperate lakes. While these chrysophytes link bacterial carbon as well as primary production to the larger food web, few studies have examined their vertical distribution over a season. Data were collected over a 2.5 yr period in mesotrophic Lake Lacawac in eastern Pennsylvania (USA) to examine water column attributes relating to seasonality of the mixotrophic alga D. cylindricum, and specifically to address a hypo thesis that abundance and vertical distribution in the genus are associated with temperature. This information was used to guide laboratory experiments examining temperature and light effects on growth, feeding, and vertical migration of cultured Dinobryon. Data from Lake Lacawac and the literature indicated that high abundances of Dinobryon were associated with a narrow range of temperature (9-18°C) relative to temperatures where they were present (3-26°C). High abundances of several species of Dynobryon were associated with this temperature range, and occurred from late winter to late spring, depending on latitude and depth in the water column. Although high Dinobryon abundances were not tied directly to levels of photosynthetically active radiation in Lake Lacawac, a UV-exclusion experiment in a nearby oligotrophic lake indicated a temperature-dependent negative effect of UV radiation. UV may limit the occurrence of Dinobryon populations in surface waters of clear oligotrophic lakes. Laboratory experiments showed that both light and temperature affected growth and feeding rates of Dinobryon, and that maximum feeding and growth rates occurred within the temperature range where high Dinobryon abundances were observed in field studies.
    • _Dinobryon spp._ are common components of the phytoplankton in temperate lakes. While these chrysophytes link bacterial carbon as well as primary production to the larger food web, few studies have examined their vertical distribution over a season. Data were collected over a 2.5 yr period in mesotrophic Lake Lacawac in eastern Pennsylvania (USA) to examine water column attributes relating to seasonality of the mixotrophic alga _D. cylindricum_, and specifically to address a hypo thesis that abundance and vertical distribution in the genus are associated with temperature. This information was used to guide laboratory experiments examining temperature and light effects on growth, feeding, and vertical migration of cultured _Dinobryon_. Data from Lake Lacawac and the literature indicated that high abundances of _Dinobryon_ were associated with a narrow range of temperature (9-18°C) relative to temperatures where they were present (3-26°C). High abundances of several species of _Dynobryon_ were associated with this temperature range, and occurred from late winter to late spring, depending on latitude and depth in the water column. Although high _Dinobryon_ abundances were not tied directly to levels of photosynthetically active radiation in Lake Lacawac, a UV-exclusion experiment in a nearby oligotrophic lake indicated a temperature-dependent negative effect of UV radiation. UV may limit the occurrence of _Dinobryon_ populations in surface waters of clear oligotrophic lakes. Laboratory experiments showed that both light and temperature affected growth and feeding rates of _Dinobryon_, and that maximum feeding and growth rates occurred within the temperature range where high _Dinobryon_ abundances were observed in field studies.
    Publication Date
    • 2013-01-01
    • 2013-12-16
  • Updated