Temporal changes in biomass specific photosynthesis during the summer: regulation by environmental factors and the importance of phytoplankton succession

Donald C. Pierson, Kurt Pettersson, V. Istvánovics

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Measurements of phytoplankton photosynthesis vs. irradiance relationships have been made at 3-7 day intervals in Lake Erken (central Sweden) for three years during summer stratification. Both the rate of light-limited (αB) and light-saturated (Pmax B) photosynthesis per unit chlorophyll a showed distinct and similar temporal trends in each year. Seasonal trends were especially evident for Pmax B, which increased in value for several weeks following the onset of thermal stratification, and then declined in the presence of the large colonial blue-green alga, Gloeotrichia echinulata. By late summer, when the biomass of G. echinulata had decreased, Pmax B again rose to its early summer value. The covariation of biomass-specific photosynthesis with the blooming of G. echinulata was the one clear seasonal (week-month) pattern which emerged in each of 3 years. Over short (day-week) time scales, changes in αB were related to changes in irradiance exposure on the day of sampling. However, the relationship between these two parameters was variable in time, since it was superimposed upon longer term trends controlled by changes in phytoplankton species composition. Increases in G. echinulata biomass corresponded with a deepening of the thermocline, which both increased internal phosphorus loading and the transport of resting G. echinulata colonies into the epilimnion. The timing and magnitude of the yearly G. echinulata bloom was as a result related to the seasonal development of thermal stratification. These results illustrate the importance of seasonal changes in the phytoplankton community as a factor regulating rates of biomass specific photosynthesis, particularly when the successional changes involve species with very different life strategies.

Original languageEnglish
Pages (from-to)119-135
Number of pages17
JournalHydrobiologia
Volume243-244
Issue number1
DOIs
Publication statusPublished - Oct 1992

Fingerprint

Photosynthesis
Phytoplankton
photosynthesis
Biomass
environmental factor
phytoplankton
Thermal stratification
environmental factors
stratification
summer
biomass
temperature profiles
irradiance
Gloeotrichia
seasonal development
epilimnion
Chlorophyll
thermocline
Lakes
Phosphorus

ASJC Scopus subject areas

  • Water Science and Technology
  • Pollution
  • Environmental Science(all)
  • Oceanography
  • Aquatic Science

Cite this

Temporal changes in biomass specific photosynthesis during the summer : regulation by environmental factors and the importance of phytoplankton succession. / Pierson, Donald C.; Pettersson, Kurt; Istvánovics, V.

In: Hydrobiologia, Vol. 243-244, No. 1, 10.1992, p. 119-135.

Research output: Contribution to journalArticle

@article{dea5cfbbec7943fbac508a1c35cf7931,
title = "Temporal changes in biomass specific photosynthesis during the summer: regulation by environmental factors and the importance of phytoplankton succession",
abstract = "Measurements of phytoplankton photosynthesis vs. irradiance relationships have been made at 3-7 day intervals in Lake Erken (central Sweden) for three years during summer stratification. Both the rate of light-limited (αB) and light-saturated (Pmax B) photosynthesis per unit chlorophyll a showed distinct and similar temporal trends in each year. Seasonal trends were especially evident for Pmax B, which increased in value for several weeks following the onset of thermal stratification, and then declined in the presence of the large colonial blue-green alga, Gloeotrichia echinulata. By late summer, when the biomass of G. echinulata had decreased, Pmax B again rose to its early summer value. The covariation of biomass-specific photosynthesis with the blooming of G. echinulata was the one clear seasonal (week-month) pattern which emerged in each of 3 years. Over short (day-week) time scales, changes in αB were related to changes in irradiance exposure on the day of sampling. However, the relationship between these two parameters was variable in time, since it was superimposed upon longer term trends controlled by changes in phytoplankton species composition. Increases in G. echinulata biomass corresponded with a deepening of the thermocline, which both increased internal phosphorus loading and the transport of resting G. echinulata colonies into the epilimnion. The timing and magnitude of the yearly G. echinulata bloom was as a result related to the seasonal development of thermal stratification. These results illustrate the importance of seasonal changes in the phytoplankton community as a factor regulating rates of biomass specific photosynthesis, particularly when the successional changes involve species with very different life strategies.",
author = "Pierson, {Donald C.} and Kurt Pettersson and V. Istv{\'a}novics",
year = "1992",
month = "10",
doi = "10.1007/BF00007027",
language = "English",
volume = "243-244",
pages = "119--135",
journal = "Hydrobiologia",
issn = "0018-8158",
publisher = "Springer Netherlands",
number = "1",

}

TY - JOUR

T1 - Temporal changes in biomass specific photosynthesis during the summer

T2 - regulation by environmental factors and the importance of phytoplankton succession

AU - Pierson, Donald C.

AU - Pettersson, Kurt

AU - Istvánovics, V.

PY - 1992/10

Y1 - 1992/10

N2 - Measurements of phytoplankton photosynthesis vs. irradiance relationships have been made at 3-7 day intervals in Lake Erken (central Sweden) for three years during summer stratification. Both the rate of light-limited (αB) and light-saturated (Pmax B) photosynthesis per unit chlorophyll a showed distinct and similar temporal trends in each year. Seasonal trends were especially evident for Pmax B, which increased in value for several weeks following the onset of thermal stratification, and then declined in the presence of the large colonial blue-green alga, Gloeotrichia echinulata. By late summer, when the biomass of G. echinulata had decreased, Pmax B again rose to its early summer value. The covariation of biomass-specific photosynthesis with the blooming of G. echinulata was the one clear seasonal (week-month) pattern which emerged in each of 3 years. Over short (day-week) time scales, changes in αB were related to changes in irradiance exposure on the day of sampling. However, the relationship between these two parameters was variable in time, since it was superimposed upon longer term trends controlled by changes in phytoplankton species composition. Increases in G. echinulata biomass corresponded with a deepening of the thermocline, which both increased internal phosphorus loading and the transport of resting G. echinulata colonies into the epilimnion. The timing and magnitude of the yearly G. echinulata bloom was as a result related to the seasonal development of thermal stratification. These results illustrate the importance of seasonal changes in the phytoplankton community as a factor regulating rates of biomass specific photosynthesis, particularly when the successional changes involve species with very different life strategies.

AB - Measurements of phytoplankton photosynthesis vs. irradiance relationships have been made at 3-7 day intervals in Lake Erken (central Sweden) for three years during summer stratification. Both the rate of light-limited (αB) and light-saturated (Pmax B) photosynthesis per unit chlorophyll a showed distinct and similar temporal trends in each year. Seasonal trends were especially evident for Pmax B, which increased in value for several weeks following the onset of thermal stratification, and then declined in the presence of the large colonial blue-green alga, Gloeotrichia echinulata. By late summer, when the biomass of G. echinulata had decreased, Pmax B again rose to its early summer value. The covariation of biomass-specific photosynthesis with the blooming of G. echinulata was the one clear seasonal (week-month) pattern which emerged in each of 3 years. Over short (day-week) time scales, changes in αB were related to changes in irradiance exposure on the day of sampling. However, the relationship between these two parameters was variable in time, since it was superimposed upon longer term trends controlled by changes in phytoplankton species composition. Increases in G. echinulata biomass corresponded with a deepening of the thermocline, which both increased internal phosphorus loading and the transport of resting G. echinulata colonies into the epilimnion. The timing and magnitude of the yearly G. echinulata bloom was as a result related to the seasonal development of thermal stratification. These results illustrate the importance of seasonal changes in the phytoplankton community as a factor regulating rates of biomass specific photosynthesis, particularly when the successional changes involve species with very different life strategies.

UR - http://www.scopus.com/inward/record.url?scp=0027100721&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027100721&partnerID=8YFLogxK

U2 - 10.1007/BF00007027

DO - 10.1007/BF00007027

M3 - Article

AN - SCOPUS:0027100721

VL - 243-244

SP - 119

EP - 135

JO - Hydrobiologia

JF - Hydrobiologia

SN - 0018-8158

IS - 1

ER -