Extreme temperature impairs growth and productivity in a common tropical marine copepod

Nam X Doan, Minh T T Vu, Hung Q Pham, Mary Wisz, Torkel Gissel Nielsen, Khuong Van Dinh*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Shallow, tropical marine ecosystems provide essential ecosystem goods and services, but it is unknown how these ecosystems will respond to the increased exposure to the temperature extremes that are likely to become more common as climate change progresses. To address this issue, we tracked the fitness and productivity of a key zooplankton species, the copepod Pseudodiaptomus annandalei, acclimated at two temperatures (30 and 34 °C) over three generations. 30 °C is the mean temperature in the shallow water of the coastal regions in Southeast Asia, while 34 °C simulated a temperature extreme that occurs frequently during the summer period. For each generation, we measured the size at maturity and reproductive success of individuals. In all three generations, we found strong negative effects of warming on all measured fitness-related parameters, including prolonged development time, reduced size at maturity, smaller clutch sizes, lower hatching success, and reduced naupliar production. Our results suggest that P. annandalei are already exposed to temperatures that exceed their upper thermal optimum. Increased exposure to extreme temperatures may reduce the abundance of these tropical marine copepods, and thus reduce the availability of resources to higher trophic levels.
Original languageEnglish
Article number4550
JournalScientific Reports
Volume9
Issue number1
Number of pages9
ISSN2045-2322
DOIs
Publication statusPublished - 2019

Keywords

  • Climate-change ecology
  • Tropical ecology

Cite this

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title = "Extreme temperature impairs growth and productivity in a common tropical marine copepod",
abstract = "Shallow, tropical marine ecosystems provide essential ecosystem goods and services, but it is unknown how these ecosystems will respond to the increased exposure to the temperature extremes that are likely to become more common as climate change progresses. To address this issue, we tracked the fitness and productivity of a key zooplankton species, the copepod Pseudodiaptomus annandalei, acclimated at two temperatures (30 and 34 °C) over three generations. 30 °C is the mean temperature in the shallow water of the coastal regions in Southeast Asia, while 34 °C simulated a temperature extreme that occurs frequently during the summer period. For each generation, we measured the size at maturity and reproductive success of individuals. In all three generations, we found strong negative effects of warming on all measured fitness-related parameters, including prolonged development time, reduced size at maturity, smaller clutch sizes, lower hatching success, and reduced naupliar production. Our results suggest that P. annandalei are already exposed to temperatures that exceed their upper thermal optimum. Increased exposure to extreme temperatures may reduce the abundance of these tropical marine copepods, and thus reduce the availability of resources to higher trophic levels.",
keywords = "Climate-change ecology, Tropical ecology",
author = "Doan, {Nam X} and Vu, {Minh T T} and Pham, {Hung Q} and Mary Wisz and Nielsen, {Torkel Gissel} and Dinh, {Khuong Van}",
year = "2019",
doi = "10.1038/s41598-019-40996-7",
language = "English",
volume = "9",
journal = "Scientific Reports",
issn = "2045-2322",
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Extreme temperature impairs growth and productivity in a common tropical marine copepod. / Doan, Nam X; Vu, Minh T T; Pham, Hung Q; Wisz, Mary; Nielsen, Torkel Gissel; Dinh, Khuong Van.

In: Scientific Reports, Vol. 9, No. 1, 4550, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Extreme temperature impairs growth and productivity in a common tropical marine copepod

AU - Doan, Nam X

AU - Vu, Minh T T

AU - Pham, Hung Q

AU - Wisz, Mary

AU - Nielsen, Torkel Gissel

AU - Dinh, Khuong Van

PY - 2019

Y1 - 2019

N2 - Shallow, tropical marine ecosystems provide essential ecosystem goods and services, but it is unknown how these ecosystems will respond to the increased exposure to the temperature extremes that are likely to become more common as climate change progresses. To address this issue, we tracked the fitness and productivity of a key zooplankton species, the copepod Pseudodiaptomus annandalei, acclimated at two temperatures (30 and 34 °C) over three generations. 30 °C is the mean temperature in the shallow water of the coastal regions in Southeast Asia, while 34 °C simulated a temperature extreme that occurs frequently during the summer period. For each generation, we measured the size at maturity and reproductive success of individuals. In all three generations, we found strong negative effects of warming on all measured fitness-related parameters, including prolonged development time, reduced size at maturity, smaller clutch sizes, lower hatching success, and reduced naupliar production. Our results suggest that P. annandalei are already exposed to temperatures that exceed their upper thermal optimum. Increased exposure to extreme temperatures may reduce the abundance of these tropical marine copepods, and thus reduce the availability of resources to higher trophic levels.

AB - Shallow, tropical marine ecosystems provide essential ecosystem goods and services, but it is unknown how these ecosystems will respond to the increased exposure to the temperature extremes that are likely to become more common as climate change progresses. To address this issue, we tracked the fitness and productivity of a key zooplankton species, the copepod Pseudodiaptomus annandalei, acclimated at two temperatures (30 and 34 °C) over three generations. 30 °C is the mean temperature in the shallow water of the coastal regions in Southeast Asia, while 34 °C simulated a temperature extreme that occurs frequently during the summer period. For each generation, we measured the size at maturity and reproductive success of individuals. In all three generations, we found strong negative effects of warming on all measured fitness-related parameters, including prolonged development time, reduced size at maturity, smaller clutch sizes, lower hatching success, and reduced naupliar production. Our results suggest that P. annandalei are already exposed to temperatures that exceed their upper thermal optimum. Increased exposure to extreme temperatures may reduce the abundance of these tropical marine copepods, and thus reduce the availability of resources to higher trophic levels.

KW - Climate-change ecology

KW - Tropical ecology

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DO - 10.1038/s41598-019-40996-7

M3 - Journal article

VL - 9

JO - Scientific Reports

JF - Scientific Reports

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