NDLI: Do increased temperature and CO2 levels affect the growth, photosynthesis, and respiration of the marine macroalga Pyropia haitanensis (Rhodophyta)? An experimental study

Content Provider	Springer Nature Link
Author	Liu, Chunxiang Zou, Dinghui
Copyright Year	2014
Abstract	The marine red macroalgae Pyropia haitanensis (Rhodophyta) were cultured at 18 and 22°C, and at 390 and 1,000 ppm CO2, to examine the potential influence of global change on this commercially important species. The results showed that elevated CO2 or temperature hardly affected the relative growth rate. However, the maximal photochemical yield (F v/F m) was increased by elevated CO2 or temperature. The light-saturated maximum photosynthetic rates significantly increased with the increasing growth temperature, but decreased dramatically with elevated CO2. While the increasing growth temperature enhanced the dark respiration (R d), elevated CO2 had no significant effect on it. An increase of growth temperature lowered the temperature sensitivities (i.e., the Q 10 values) of both gross photosynthesis (P g) and respiration, whereas elevated CO2 did not significantly affect the Q 10 values for these two metabolic processes. Algae grown at 22°C exhibited higher ratio of R d to P g than 18°C-grown algae. By contrast, CO2-enriched growth conditions exerted no significant effect on the ratio. The results suggested that elevated temperature exerted a greater pronounced effect on carbon metabolism than elevated CO2 did. We proposed that the growth of P. haitanensis would not be stimulated by the ongoing climate change (increasing atmospheric CO2 and global warming).
Starting Page	285
Ending Page	296
Page Count	12
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	745
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-11-16
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pyropia haitanensis Growth Photosynthesis Respiration Temperature Elevated CO2 Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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