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Authors Smith, TM; York, PH; Macreadie, PI; Keough, MJ; Ross, DJ; Sherman, CDH
Author Full Name Smith, Timothy M.; York, Paul H.; Macreadie, Peter I.; Keough, Michael J.; Ross, D. Jeff; Sherman, Craig D. H.
Title Recovery pathways from small-scale disturbance in a temperate Australian seagrass
Source MARINE ECOLOGY PROGRESS SERIES
Language English
Document Type Article
Author Keywords Zostera nigricaulis; Port Phillip Bay; Sexual reproduction; Asexual reproduction; Resilience; Spatial scales; Heterozostera nigricaulis
Keywords Plus PORT PHILLIP BAY; EELGRASS ZOSTERA-MARINA; CHESAPEAKE BAY; REGIME SHIFTS; RESILIENCE; MEADOW; RECOLONIZATION; GERMINATION; ECOSYSTEM; PERSISTENCE
Abstract Recovery from disturbance is a key element of ecosystem persistence, and recovery can be influenced by large-scale regional differences and smaller local-scale variations in environmental conditions. Seagrass beds are an important yet threatened nearshore habitat and recover from disturbance by regrowth, vegetative extension and dispersive propagules. We described recovery pathways from small-scale disturbances in the seagrass Zostera nigricaulis in Port Phillip Bay, a large embayment in southeastern Australia, and tested whether these pathways differed between 5 regions with different hydrodynamic conditions and water quality, and between sites within those regions. Recovery pathways were broadly consistent. When aboveground biomass was removed, recovery, defined as the point at which disturbed areas converged with undisturbed controls, took from 2 to 8 mo, but when we removed above-and below-ground biomass, it took between 2 and 13 mo. There was no evidence of recovery resulting from sexual reproduction at any sites regardless of the presence of seeds in the sediment or flower production. We found no differences in recovery at the regional scale, but we found substantial differences between local sites. At some sites, rapid recovery occurred because seagrasses grew quickly, but at others, apparent recovery occurred because regrowth coincided with overall declines in cover of undisturbed areas. Recovery time was unrelated to seagrass canopy height, biomass, percentage cover, stem density, seed bank density, epiphyte cover or sediment organic matter in seagrass adjacent to disturbance experiments. This study highlights the importance of understanding fine-scale variation in local recovery mechanisms, which may override or obscure any regional signal.
Author Address [Smith, Timothy M.; York, Paul H.; Sherman, Craig D. H.] Deakin Univ, Ctr Integrat Ecol, Sch Life & Environm Sci, Waurn Ponds Campus,75 Pigdons Rd Locked Bag 20000, Geelong, Vic 3220, Australia; [York, Paul H.] James Cook Univ, Ctr Trop Water & Aquat Ecosyst Res TropWATER, POB 6811, Cairns, Qld 4870, Australia; [Macreadie, Peter I.] Deakin Univ, Ctr Integrat Ecol, Sch Life & Environm Sci, Burwood Campus,221 Burwood Highway, Burwood, Vic 3125, Australia; [Macreadie, Peter I.] Univ Technol Sydney, Sch Environm, Plant Funct Biol & Climate Change Cluster C3, Broadway, NSW 2007, Australia; [Smith, Timothy M.; York, Paul H.; Keough, Michael J.] Univ Melbourne, Sch BioSci, Melbourne, Vic 3010, Australia; [Ross, D. Jeff] Univ Tasmania, Inst Marine & Antarctic Studies, Taroona, Tas 7053, Australia
Reprint Address Smith, TM (corresponding author), Deakin Univ, Ctr Integrat Ecol, Sch Life & Environm Sci, Waurn Ponds Campus,75 Pigdons Rd Locked Bag 20000, Geelong, Vic 3220, Australia.; Smith, TM (corresponding author), Univ Melbourne, Sch BioSci, Melbourne, Vic 3010, Australia.
E-mail Address tim.smith@deakin.edu.au
ResearcherID Number York, Paul H./C-4120-2009; Smith, Timothy/C-9283-2013; Ross, Donald J/F-7607-2012; Sherman, Craig/A-2484-2010
ORCID Number York, Paul H./0000-0003-3530-4146; Smith, Timothy/0000-0001-8612-8600; Ross, Donald J/0000-0002-8659-3833; Sherman, Craig/0000-0003-2099-0462
Funding Agency and Grant Number Department of Environment, Land, Water and Planning (Australia); Australian Research CouncilAustralian Research Council [DE130101084]; [DP1093230]
Funding Text This work was funded by the Department of Environment, Land, Water and Planning (Australia). P.I.M. was supported by Australian Research Council Discovery Early Career Researcher Award DE130101084. Additional support came from Discovery Award DP1093230 to M.J.K. All work was performed at the Victorian Marine Science Consortium. Assistance in the field and laboratory was provided by E. Cumming, R. Watson, D. Lees, A. Wayman and P. Ho.
Times Cited 9
Total Times Cited Count (WoS, BCI, and CSCD) 9
Publisher INTER-RESEARCH
Publisher City OLDENDORF LUHE
Publisher Address NORDBUNTE 23, D-21385 OLDENDORF LUHE, GERMANY
ISSN 0171-8630
29-Character Source Abbreviation MAR ECOL PROG SER
ISO Source Abbreviation Mar. Ecol.-Prog. Ser.
Publication Date JAN 19
Year Published 2016
Volume 542
Beginning Page 97
Ending Page 108
Digital Object Identifier (DOI) 10.3354/meps11531
Page Count 12
Web of Science Category Ecology; Marine & Freshwater Biology; Oceanography
Subject Category Environmental Sciences & Ecology; Marine & Freshwater Biology; Oceanography
Document Delivery Number DC0QN
Unique Article Identifier WOS:000368922900008
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