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Publication Type J
Authors Cumming, E; Jarvis, JC; Sherman, CDH; York, PH; Smith, TM
Author Full Name Cumming, Erin; Jarvis, Jessie C.; Sherman, Craig D. H.; York, Paul H.; Smith, Timothy M.
Title Seed germination in a southern Australian temperate seagrass
Source PEERJ
Language English
Document Type Article
Author Keywords Seagrass; Sediment; Temperature; Burial depth; Salinity; Heterozostera tasmanica; Zostera nigricaulis; Resilience
Keywords Plus ZOSTERA-MARINA L; PORT PHILLIP BAY; CHESAPEAKE BAY; L EELGRASS; ENVIRONMENTAL-FACTORS; CAPRICORNI ASCHERS; EASTERN AUSTRALIA; RESTORATION; RECOVERY; SCALE
Abstract In a series of experiments, seeds from a temperate seagrass species, Zostera nigricaulis collected in Port Phillip Bay, Victoria, Australia were exposed to a range of salinities (20 PSU pulse/no pulse, 25 PSU, 30 PSU, 35 PSU), temperatures (13 degrees C, 17 degrees C, 22 degrees C), burial depths (0 cm, 1 cm, 2 cm) and site specific sediment characteristics (fine, medium, coarse) to quantify their impacts on germination rate and maximum overall germination. In southern Australia the seagrass Z. nigricaulis is a common subtidal species; however, little is known about the factors that affect seed germination which is a potential limiting factor in meadow resilience to natural and anthropogenic disturbances. Overall seed germination was low (<20%) with germination decreasing to <10% when seeds were placed in the sediment. When germination of Z. nigricaulis seeds was observed, it was enhanced (greater overall germination and shorter time to germination) when seeds were exposed to a 20 PSU pulse for 24 h, maintained at salinity of 25 PSU, temperatures <13 degrees C, in sediments with fine or medium grain sand and buried at a depth of <1 cm. These results indicate that germination of Z. nigricaulis seeds under in situ conditions may be seasonally limited by temperatures in southern Australia. Seed germination may be further restricted by salinity as freshwater pulses reaching 20 PSU are typically only observed in Port Phillip Bay following large scale rainfall events. As a result, these populations may be particularly susceptible to disturbance with only a seasonally limited capacity for recovery.
Author Address [Cumming, Erin; Sherman, Craig D. H.; York, Paul H.; Smith, Timothy M.] Deakin Univ, Ctr Integrat Ecol, Sch Life & Environm Sci, Waurn Ponds, Vic, Australia; [Jarvis, Jessie C.] Univ North Carolina Wilmington, Ctr Marine Sci, Dept Biol & Marine Biol, Wilmington, NC USA; [Jarvis, Jessie C.; York, Paul H.] James Cook Univ, Ctr Trop Water & Aquat Ecosyst Res, Cairns, Qld, Australia
Reprint Address Cumming, E (reprint author), Deakin Univ, Ctr Integrat Ecol, Sch Life & Environm Sci, Waurn Ponds, Vic, Australia.
E-mail Address erincumming1@gmail.com
ResearcherID Number York, Paul/C-4120-2009; Smith, Timothy/C-9283-2013
ORCID Number York, Paul/0000-0003-3530-4146; Smith, Timothy/0000-0001-8612-8600
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Cited Reference Count 69
Publisher PEERJ INC
Publisher City LONDON
Publisher Address 341-345 OLD ST, THIRD FLR, LONDON, EC1V 9LL, ENGLAND
ISSN 2167-8359
29-Character Source Abbreviation PEERJ
ISO Source Abbreviation PeerJ
Publication Date MAR 23
Year Published 2017
Volume 5
Article Number e3114
Digital Object Identifier (DOI) 10.7717/peerj.3114
Page Count 19
Web of Science Category Multidisciplinary Sciences
Subject Category Science & Technology - Other Topics
Document Delivery Number EQ3KJ
Unique Article Identifier WOS:000397970600006
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