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Ocean acidification and kelp development: Reduced pH has no negative effects on meiospore germination and gametophyte development of Macrocystis pyrifera and Undaria pinnatifida.

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العنوان: Ocean acidification and kelp development: Reduced pH has no negative effects on meiospore germination and gametophyte development of Macrocystis pyrifera and Undaria pinnatifida.
المؤلفون: Leal PP; Department of Botany, University of Otago, 479 Great King Street, Dunedin, 9016, New Zealand.; Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point, Hobart, Tasmania, 7004, Australia., Hurd CL; Department of Botany, University of Otago, 479 Great King Street, Dunedin, 9016, New Zealand.; Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point, Hobart, Tasmania, 7004, Australia., Fernández PA; Department of Botany, University of Otago, 479 Great King Street, Dunedin, 9016, New Zealand.; Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point, Hobart, Tasmania, 7004, Australia., Roleda MY; Department of Botany, University of Otago, 479 Great King Street, Dunedin, 9016, New Zealand.; Norwegian Institute of Bioeconomy Research, Kudalsveien 6, 8049, Bodø, Norway.
المصدر: Journal of phycology [J Phycol] 2017 Jun; Vol. 53 (3), pp. 557-566. Date of Electronic Publication: 2017 Apr 18.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Wiley Periodicals Inc Country of Publication: United States NLM ID: 9882935 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1529-8817 (Electronic) Linking ISSN: 00223646 NLM ISO Abbreviation: J Phycol Subsets: MEDLINE
أسماء مطبوعة: Publication: <2015-> : Malden, MA : Wiley Periodicals Inc.
Original Publication: [New York] Phycological Society of America.
مواضيع طبية MeSH: Kelp/*growth & development , Macrocystis/*growth & development , Seawater/*chemistry , Undaria/*growth & development, Germ Cells, Plant/growth & development ; Hydrogen-Ion Concentration ; Oceans and Seas
مستخلص: The absorption of anthropogenic CO 2 by the oceans is causing a reduction in the pH of the surface waters termed ocean acidification (OA). This could have substantial effects on marine coastal environments where fleshy (non-calcareous) macroalgae are dominant primary producers and ecosystem engineers. Few OA studies have focused on the early life stages of large macroalgae such as kelps. This study evaluated the effects of seawater pH on the ontogenic development of meiospores of the native kelp Macrocystis pyrifera and the invasive kelp Undaria pinnatifida, in south-eastern New Zealand. Meiospores of both kelps were released into four seawater pH treatments (pH T 7.20, extreme OA predicted for 2300; pH T 7.65, OA predicted for 2100; pH T 8.01, ambient pH; and pH T 8.40, pre-industrial pH) and cultured for 15 d. Meiospore germination, germling growth rate, and gametophyte size and sex ratio were monitored and measured. Exposure to reduced pH T (7.20 and 7.65) had positive effects on germling growth rate and gametophyte size in both M. pyrifera and U. pinnatifida, whereas, higher pH T (8.01 and 8.40) reduced the gametophyte size in both kelps. Sex ratio of gametophytes of both kelps was biased toward females under all pH T treatments, except for U. pinnatifida at pH T 7.65. Germling growth rate under OA was significantly higher in M. pyrifera compared to U. pinnatifida but gametophyte development was equal for both kelps under all seawater pH T treatments, indicating that the microscopic stages of the native M. pyrifera and the invasive U. pinnatifida will respond similarly to OA.
(© 2017 Phycological Society of America.)
فهرسة مساهمة: Keywords: Macrocystis; Undaria; Laminariales; gametophyte; germination; hydrogen ion concentration; microscopic stages
تواريخ الأحداث: Date Created: 20170207 Date Completed: 20180214 Latest Revision: 20240109
رمز التحديث: 20240109
DOI: 10.1111/jpy.12518
PMID: 28164308
قاعدة البيانات: MEDLINE
الوصف
تدمد:1529-8817
DOI:10.1111/jpy.12518