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Meiospore development of the kelps Macrocystis pyrifera and Undaria pinnatifida under ocean acidification and ocean warming: independent effects are more important than their interaction
Citation
Leal, PP and Hurd, CL and Fernandez, PA and Roleda, MY, Meiospore development of the kelps Macrocystis pyrifera and Undaria pinnatifida under ocean acidification and ocean warming: independent effects are more important than their interaction, Marine Biology, 164 Article 7. ISSN 0025-3162 (2017) [Refereed Article]
Copyright Statement
Copyright 2016 Springer-Verlag Berlin Heidelberg
DOI: doi:10.1007/s00227-016-3039-z
Abstract
Anthropogenic atmospheric emissions of CO2
are responsible for simultaneous ocean warming (OW)
and ocean acidification (OA). These global events can
have important impacts on marine fleshy macroalgae and
coastal ecosystems. To understand the effects of OW and
OA on the early life history stages of native (Macrocystis pyrifera)
and invasive (Undaria pinnatifida) macroalgae,
a multi-factorial experiment was performed to determine the
independent and interactive effects of the drivers and the
corresponding species-specific responses. Meiospores of
M. pyrifera and U. pinnatifida were separately exposed to
a 4 × 2 factorial design of seawater pH (pHT 7.20, extreme
OA predicted for 2300; pHT 7.65, OA predicted for 2100;
pHT 8.03, ambient pH; and pHT 8.40, pre-industrial pH)
and temperature (12 °C, seasonal average temperature;
and 16 °C, OW predicted for 2100). Over 15 days, different
physiological parameters (i.e. meiospore germination,
germling growth rate, gametophyte development and sex
ratio) were measured. Reduced seawater pH and elevated
temperature had independent and significant effects on
developmental processes (germling growth rate, and male
and female gametophyte sizes were independently greater
under OA and OW conditions), but the interaction of the
abiotic factors had no effect on any stage of meiospore
development of either species. Despite some small differences
between species (e.g. sex ratio), results of this experiment
suggest that microscopic stages of the native M. pyrifera
and the invasive U. pinnatifida will respond similarly to
OA and OW.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Ocean acidification, kelp, meiospores, temperature |
| Research Division: | Biological Sciences |
| Research Group: | Plant biology |
| Research Field: | Phycology (incl. marine grasses) |
| Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
| Objective Group: | Adaptation to climate change |
| Objective Field: | Ecosystem adaptation to climate change |
| UTAS Author: | Hurd, CL (Professor Catriona Hurd) |
| UTAS Author: | Fernandez, PA (Ms Pamela Fernandez Subiabre) |
| ID Code: | 114876 |
| Year Published: | 2017 |
| Web of Science® Times Cited: | 22 |
| Deposited By: | Ecology and Biodiversity |
| Deposited On: | 2017-03-01 |
| Last Modified: | 2018-04-18 |
| Downloads: | 0 |
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