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| Publication Type | J |
| Authors | Statton, J; Sellers, R; Dixon, KW; Kilminster, K; Merritt, DJ; Kendrick, GA |
| Author Full Name | Statton, John; Sellers, Robert; Dixon, Kingsley W.; Kilminster, Kieryn; Merritt, David J.; Kendrick, Gary A. |
| Title | Seed dormancy and germination of Halophila ovalis mediated by simulated seasonal temperature changes |
| Source | ESTUARINE COASTAL AND SHELF SCIENCE |
| Language | English |
| Document Type | Article |
| Keywords Plus | DECIPIENS OSTENFELD HYDROCHARITACEAE; ENVIRONMENTAL-FACTORS; SEAGRASS; AUSTRALIA; RESTORATION; RECOVERY; PANAMA; BAY; QUEENSLAND; ETHYLENE |
| Abstract | The seagrass, Halophila ovalis plays an important ecological and sediment stability role in estuarine systems in Australia with the species in decline in many sites. Halophila ovalis is a facultative annual, relying mainly on recruitment from the sediment seed bank for the annual regeneration of meadows. Despite this, there is little understanding of seed dormancy releasing mechanisms and germination cues. Using H. ovalis seed from the warm temperate Swan River Estuary in Western Australia, the germination ecology of H. ovalis was investigated by simulating the natural seasonal variation in water temperatures. The proportion of germinating seeds was found to be significantly different among temperature treatments (p < 0.001). The treatment with the longest period of cold exposure at 15 degrees C followed by an increase in temperature to 20-25 degrees C (i.e. cold stratification) had the highest final mean germination of 32% and the fastest, germination rate. Seeds exposed to constant mean winter temperatures of 15 degrees C had the slowest germination rate with less than two seeds germinating over 118 days. Thus temperature is a key germination cue for H. ovalis seeds and these data infer that cold stratification is an important dormancy releasing mechanism. This finding has implications for recruitment in facultative annual species like H. ovalis under global warming since the trend for increasing water temperatures in the region may limit seed -based recruitment in the future. (C) 2017 Elsevier Ltd. All rights reserved. |
| Author Address | [Statton, John; Sellers, Robert; Dixon, Kingsley W.; Kilminster, Kieryn; Merritt, David J.; Kendrick, Gary A.] Univ Western Australia, Fac Sci, Sch Biol Sci, Crawley, WA 6009, Australia; [Statton, John; Sellers, Robert; Dixon, Kingsley W.; Kilminster, Kieryn; Merritt, David J.; Kendrick, Gary A.] Univ Western Australia, Fac Sci, UWA Oceans Inst, Crawley, WA 6009, Australia; [Dixon, Kingsley W.] Curtin Univ, Dept Environm & Agr, Perth, WA, Australia; [Kilminster, Kieryn] Govt Western Australia, Dept Water & Environm Regulat, Locked Bay 33,Cloisters Sq, Perth, WA 6850, Australia; [Dixon, Kingsley W.; Merritt, David J.] Kings Pk & Bot Gardens, Kings Pk, Kings Pk, WA 6005, Australia |
| Reprint Address | Statton, J (reprint author), Univ Western Australia, Fac Sci, Sch Biol Sci, Crawley, WA 6009, Australia.; Statton, J (reprint author), Univ Western Australia, Fac Sci, UWA Oceans Inst, Crawley, WA 6009, Australia. |
| E-mail Address | john.statton@uwa.edu.au |
| ResearcherID Number | dixon, kingsley/A-8133-2016 |
| ORCID Number | dixon, kingsley/0000-0001-5989-2929; Merritt, David/0000-0002-3250-6861; Kendrick, Gary/0000-0002-0276-6064 |
| Funding Agency and Grant Number | ARC [LP130100155, LP160101011]; BMT Oceanica Environmental Consultants; Shark Bay Resources; Rottnest Island Authority; University of Western Australia; Virginia Institute of Marine Sciences; Botanic Gardens and Parks Authority of Western Australia |
| Funding Text | This project was funded through two ARC Linkage grants (LP130100155, LP160101011) with industry partners BMT Oceanica Environmental Consultants, Shark Bay Resources, Rottnest Island Authority, the University of Western Australia, Virginia Institute of Marine Sciences and the Botanic Gardens and Parks Authority of Western Australia. |
| Cited Reference Count | 45 |
| Publisher | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
| Publisher City | LONDON |
| Publisher Address | 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND |
| ISSN | 0272-7714 |
| 29-Character Source Abbreviation | ESTUAR COAST SHELF S |
| ISO Source Abbreviation | Estuar. Coast. Shelf Sci. |
| Publication Date | NOV 5 |
| Year Published | 2017 |
| Volume | 198 |
| Part Number | A |
| Beginning Page | 156 |
| Ending Page | 162 |
| Digital Object Identifier (DOI) | 10.1016/j.ecss.2017.08.045 |
| Page Count | 7 |
| Web of Science Category | Marine & Freshwater Biology; Oceanography |
| Subject Category | Marine & Freshwater Biology; Oceanography |
| Document Delivery Number | FN1WD |
| Unique Article Identifier | WOS:000415781000014 |
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