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Journal articles on the topic 'Zostera muelleri'

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Author: Grafiati

Published: 10 December 2022

Last updated: 1 May 2024

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1

Stafford-Bell, R. E., W. F. D. van Dongen, R. W. Robinson, and A. A. Chariton. "Connectivity of the seagrass Zostera muelleri within south-eastern Australia." Marine and Freshwater Research 70, no. 8 (2019): 1056. http://dx.doi.org/10.1071/mf18333.

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Contemporary oceanic conditions and local dispersal of propagules influence the genetic diversity and connectivity among seagrass populations. The degree of connectivity between populations of Zostera muelleri in south-eastern Australia is unknown. In this study we examined genetic connectivity among 25 sites containing Z. muelleri using nine polymorphic microsatellite DNA loci. We hypothesised minimal sharing of genetic material between distant populations and a degree of connectivity between local populations. Genotypic diversity was high, with 64% of populations having unique multilocus genotypes (MLGs), indicating the importance of sexual reproduction. Two sites shared MLGs, which may be due to the dispersal and recruitment of vegetative propagules. Genetic differentiation was observed between most sites. With the exception of two outlying sites, two genetic population clusters were identified across the studied populations. Regionally, the populations have high clonal diversity, are strongly differentiated and generally exist in isolation from one another. However, non-significant within-estuary differentiation was observed for three estuaries, indicating a degree of connectivity. The results of this research improve our understanding of the connectivity of Z. muelleri populations in the region, an important process for managing this ecosystem engineer.

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2

Hurtado-McCormick, V., T. Kahlke, D. Krix, A. Larkum, PJ Ralph, and JR Seymour. "Seagrass leaf reddening alters the microbiome of Zostera muelleri." Marine Ecology Progress Series 646 (July 30, 2020): 29–44. http://dx.doi.org/10.3354/meps13409.

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Seagrasses host an extremely diverse microbiome that plays fundamental roles in seagrass health and productivity but may be sensitive to shifts in host physiology. Here, we observed a leaf reddening phenomenon in Zostera muelleri and characterized bacterial assemblages associated with green and reddened leaves to determine whether this change in leaf pigmentation stimulates shifts in the seagrass microbiome. Using 16S rRNA gene amplicon sequencing, we observed that the microbiome associated with 4 different leaf pigmentation categories (i.e. green, white, purple and black) differed significantly, with substantial changes in microbiome composition when the tissue is whitened (non-pigmented). Actinobacteria, Rhodobacteraceae, Erythrobacter, Sulfitobacter and Granulosicoccus were enriched in black and/or purple tissues and discriminated these microbiomes from those associated with green leaves. Contrastingly, all ‘discriminatory’ zero-radius operational taxonomic units (zOTUs) were depleted within the communities associated with white samples. While 40% of the abundant zOTUs identified were exclusively associated with a single pigmentation category, only 3% were shared across all categories, indicating partitioning of the phyllosphere microbiome. However, a significant proportion of the ‘normal’ (green) leaf core microbiome was also retained in the core communities associated with black (70%) and purple (70%) tissues. Contrastingly, no core zOTUs were maintained in the white tissues. These results indicate that environmentally driven physiological shifts in seagrasses, such as leaf reddening expressed in response to high irradiance, can impact the seagrass leaf microbiome, resulting in significant shifts in the microbiome of reddened leaves with the most extreme expression (in white tissue of reddened leaves).

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3

Hurtado-McCormick, V., D. Krix, B. Tschitschko, N. Siboni, P. J. Ralph, and J. R. Seymour. "Shifts in the seagrass leaf microbiome associated with wasting disease in Zostera muelleri." Marine and Freshwater Research 72, no. 9 (2021): 1303. http://dx.doi.org/10.1071/mf20209.

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Seagrass wasting disease (SWD), an infection believed to be caused by Labyrinthula zosterae, has been linked to seagrass declines in several places around the world. However, there is uncertainty about the mechanisms of disease and the potential involvement of opportunistic colonising microorganisms. Using 16S rRNA gene amplicon sequencing, we compared the microbiome of SWD lesions in leaves of Zostera muelleri with communities in adjacent asymptomatic tissues and healthy leaves. The microbiome of healthy leaf tissues was dominated by Pseudomonas and Burkholderia, whereas the most predominant taxa within adjacent tissues were Pseudomonas and Rubidimonas. Members of the Saprospiraceae, potential macroalgal pathogens, were over-represented within SWD lesions. These pronounced changes in microbiome structure were also apparent when we examined the core microbiome of different tissue types. Although the core microbiome associated with healthy leaves included three operational taxonomic units (OTUs) classified as Burkholderia, Cryomorphaceae and the SAR11 clade, a single core OTU from the Arenicella was found within adjacent tissues. Burkholderia are diazotrophic microorganisms and may play an important role in seagrass nitrogen acquisition. In contrast, some members of the Arenicella have been implicated in necrotic disease in other benthic animals. Moreover, microbiome structure was maintained across sites within healthy tissues, but not within SWD lesions or the tissues immediately adjacent to lesions. Predicted functional profiles revealed increased photoautotrophic functions in SWD tissues relative to healthy leaves, but no increase in pathogenicity or virulence. Notably, we demonstrated the presence of L. zosterae in SWD lesions by polymerase chain reaction, but only in one of the two sampled locations, which indicates that other microbiological factors may be involved in the initiation or development of SWD-like symptoms. This study suggests that the dynamics of the seagrass microbiome should be considered within the diagnosis and management of SWD.

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4

Lee, HueyTyng, Agnieszka A. Golicz, Philipp E. Bayer, Yuannian Jiao, Haibao Tang, Andrew H. Paterson, Gaurav Sablok, et al. "The Genome of a Southern Hemisphere Seagrass Species (Zostera muelleri)." Plant Physiology 172, no. 1 (July 3, 2016): 272–83. http://dx.doi.org/10.1104/pp.16.00868.

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5

GOH, C. J., D. PARK, J. S. LEE, P. A. DAVEY, M. PERNICE, P. J. RALPH, and Y. HAHN. "Zostera virus T – a novel virus of the genus Tepovirus identified in the eelgrass, Zostera muelleri." Acta virologica 63, no. 04 (2019): 366–72. http://dx.doi.org/10.4149/av_2019_409.

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6

Holmer, Marianne, William W. Bennett, Angus J. P. Ferguson, Jaimie Potts, Harald Hasler-Sheetal, and David T. Welsh. "Drivers of sulfide intrusion in Zostera muelleri in a moderately affected estuary in south-eastern Australia." Marine and Freshwater Research 68, no. 11 (2017): 2134. http://dx.doi.org/10.1071/mf16402.

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The seagrass Zostera muelleri Irmisch ex Asch. is abundant in estuaries in Australia and is under pressure from coastal developments. We studied sulfide intrusion in Z. muelleri along a gradient of anthropogenic impact at five stations in the Wallis Lake estuary, Australia. Results showed differences in sediment biogeochemical conditions, seagrass metrics as well as nutrient content and sulfide intrusion along the gradient from the lower estuary (affected) to the lagoon (unaffected). Sulfide intrusion was driven by complex interactions and related to changes in seagrass morphology and sediment biogeochemistry and was modified by the exposure to wind and wave action. The sediments in the lower estuary had high contributions from phytoplanktonic detritus, whereas the organic pools in the lagoon were dominated by seagrass detritus. Despite high concentrations of organic matter, sulfide intrusion was lower at stations dominated by seagrass detritus, probably because of lower sulfide pressure from the less labile nature of organic matter. Porewater diffusive gradients in thin-film (DGT) sulfide samplers showed efficient sulfide reoxidation in the rhizosphere, with high sulfur incorporation in the plants from sedimentary sulfides being likely due to sulfate uptake from reoxidised sulfide. This is a unique adaptation of Z. muelleri, which allows high productivity in estuarine sediments.

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7

Wendländer, Nele Svenja, Troels Lange, Rod M. Connolly, Erik Kristensen, Ryan M. Pearson, Thomas Valdemarsen, and Mogens R. Flindt. "Assessing methods for restoring seagrass (Zostera muelleri) in Australia’s subtropical waters." Marine and Freshwater Research 71, no. 8 (2020): 996. http://dx.doi.org/10.1071/mf19237.

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Zostera muelleri, the dominant seagrass species along the eastern coastline of Australia, has declined due to anthropogenic stressors, including reduced water clarity. Water quality has improved in recent years, but restoration efforts are hampered by limited knowledge of transplantation methods. To support future restoration efforts, we tested multiple techniques for transplanting mature seagrass shoots: (1) sediment cores with intact seagrass plants (plug); (2) individual shoots anchored on frames (frame); (3) frame methods combined with subsurface mats to exclude bioturbating animals (mat+frame); (4) above-ground cages to exclude grazing fish (cage+frame); and (5) combined treatment of above-ground cages and subsurface mats (cage+mat+frame). Transplant success over 10 months showed considerable variability among locations. At one site, seagrass persisted in all treatments, with highest growth in the mat+frame treatment. At two locations, uncaged shoots were lost within 6–35 days of transplanting, presumably due to grazing by fish. In treatments with cages, growth was again highest in the mat+frame treatment. At the fourth location, all seagrass was lost due to physical stress. Thus, we conclude that transplantation success is highest using the mat+frame technique, but overall success depends on careful assessment of biotic and abiotic stressors at the chosen locations.

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8

Shah Mohammadi, Nasim, Pimchanok Buapet, Mathieu Pernice, Bethany Signal, Tim Kahlke, Leo Hardke, and Peter J. Ralph. "Transcriptome profiling analysis of the seagrass, Zostera muelleri under copper stress." Marine Pollution Bulletin 149 (December 2019): 110556. http://dx.doi.org/10.1016/j.marpolbul.2019.110556.

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9

Kerr, E. A., and S. Strother. "Effects of irradiance, temperature and salinity on photosynthesis of Zostera muelleri." Aquatic Botany 23, no. 2 (November 1985): 177–83. http://dx.doi.org/10.1016/0304-3770(85)90063-4.

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10

Nicastro, Andrea, Ka-Man Lee, and Melanie J. Bishop. "Assimilation of organic matter by two benthic consumers across gradients of latitude and nutrient enrichment." Marine and Freshwater Research 68, no. 5 (2017): 840. http://dx.doi.org/10.1071/mf15436.

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In modifying the traits of producers, coastal development and latitude may influence the assimilation of organic matter resources by consumers. The aim of the present study was to assess spatial variation across gradients of latitude and diffuse nitrogen loading in: (1) the N content of the seagrass Zostera muelleri and the mangrove Avicennia marina; and (2) the ultimate organic matter sources (inferred from δ15N and δ13C signatures) of the detritivorous mud whelk Pyrazus ebeninus and the predatory polychaete Nephtys australiensis. It was hypothesised that the organic matter sources of each of the two consumers would vary spatially, following patterns of spatial variation in the N content of primary producers. Sampling in 12 estuaries of New South Wales, Australia, spanning 7° of latitude and variable nutrient loading revealed that the nitrogen content of Z. muelleri was negatively correlated with latitude and nitrogen loading, but the nitrogen content of A. marina leaves followed only latitude. Of the four organic matter sources considered by the present study, Z. muelleri was consistently the main source passed through the trophic chain to the detritivore P. ebeninus and the predator N. australiensis. Nevertheless, the proportionate contribution of Z. muelleri and microphytobenthos to the carbon sources of N. australiensis varied with latitude, the former negatively and the latter positively. These relationships suggest that latitude may influence carbon sources of consumers by modifying producer physicochemical traits.

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11

Siciliano, Alfonso, David R. Schiel, and Mads S. Thomsen. "Effects of local anthropogenic stressors on a habitat cascade in an estuarine seagrass system." Marine and Freshwater Research 70, no. 8 (2019): 1129. http://dx.doi.org/10.1071/mf18414.

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Recent research has shown that co-occurring primary and secondary habitat-forming species typically support higher biodiversity than do monocultures of the primary habitat-former alone. However, these ‘habitat cascades’ may not be universal and it is important to know whether, when and where positive effects on biodiversity from secondary habitat-forming species change to negative effects. Here, we tested how anthropogenic stressors (fertilisation and sedimentation) and unattached secondary habitat-forming Ulva seaweeds affected the primary habitat-forming seagrass, Zostera muelleri, and its associated invertebrates in the Avon–Heathcote Estuary, New Zealand. We experimentally stressed Zostera by adding different fertilisation and sediment levels. Fertilisation had little impact, whereas even low sedimentation levels had strong negative effects on Zostera and its associated fauna. In a second experiment, sediments and Ulva were added to seagrass beds and unvegetated mudflats to test whether sediment stress modifies habitat cascades. We found again strong negative effects of sediments on Zostera, irrespective of spatio-temporal conditions, and that negative effects of sediments on invertebrates were enhanced in the presence of the secondary habitat former. These results highlighted that anthropogenic stressors can destabilise habitat cascades; processes that may be of particular importance in estuaries that are characterised by low biodiversity and stressful environmental conditions.

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12

Matheson, Fleur E. "Critical summer irradiance requirements for biomass accrual of the seagrass Zostera muelleri." Aquatic Botany 178 (April 2022): 103499. http://dx.doi.org/10.1016/j.aquabot.2022.103499.

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13

Davey, Peter A., Mathieu Pernice, Justin Ashworth, Unnikrishnan Kuzhiumparambil, Milán Szabó, Rudy Dolferus, and Peter J. Ralph. "A new mechanistic understanding of light-limitation in the seagrass Zostera muelleri." Marine Environmental Research 134 (March 2018): 55–67. http://dx.doi.org/10.1016/j.marenvres.2017.12.012.

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14

Kerr, E. A., and S. Strother. "Seasonal changes in standing crop of Zostera muelleri in south-eastern Australia." Aquatic Botany 38, no. 4 (December 1990): 369–76. http://dx.doi.org/10.1016/0304-3770(90)90031-f.

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15

Mills, V. Sadie, and Katrin Berkenbusch. "Seagrass (Zostera muelleri) patch size and spatial location influence infaunal macroinvertebrate assemblages." Estuarine, Coastal and Shelf Science 81, no. 1 (January 2009): 123–29. http://dx.doi.org/10.1016/j.ecss.2008.10.005.

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16

Kohlmeier, Dorothea, Conrad A. Pilditch, Janet F. Bornman, and Kai Bischof. "Site specific differences in morphometry and photophysiology in intertidal Zostera muelleri meadows." Aquatic Botany 116 (May 2014): 104–9. http://dx.doi.org/10.1016/j.aquabot.2014.02.011.

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17

Bearlin, Andrew R., Mark A. Burgman, and Helen M. Regan. "A stochastic model for seagrass (Zostera muelleri) in Port Phillip Bay, Victoria, Australia." Ecological Modelling 118, no. 2-3 (June 1999): 131–48. http://dx.doi.org/10.1016/s0304-3800(99)00011-3.

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18

Nicastro, Andrea, and Melanie J. Bishop. "Effects of tidal inundation on benthic macrofauna associated with the eelgrass Zostera muelleri." Estuarine, Coastal and Shelf Science 117 (January 2013): 238–47. http://dx.doi.org/10.1016/j.ecss.2012.11.011.

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19

Jones, Tracey C., Chrissen E. C. Gemmill, and Conrad A. Pilditch. "Genetic variability of New Zealand seagrass (Zostera muelleri) assessed at multiple spatial scales." Aquatic Botany 88, no. 1 (January 2008): 39–46. http://dx.doi.org/10.1016/j.aquabot.2007.08.017.

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20

Pernice, Mathieu, Sutinee Sinutok, Gaurav Sablok, Audrey S. Commault, Martin Schliep, Peter I. Macreadie, Michael A. Rasheed, and Peter J. Ralph. "Molecular physiology reveals ammonium uptake and related gene expression in the seagrass Zostera muelleri." Marine Environmental Research 122 (December 2016): 126–34. http://dx.doi.org/10.1016/j.marenvres.2016.10.003.

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21

Sherman, Craig D. H., Annalise M. Stanley, Michael J. Keough, Michael G. Gardner, and Peter I. Macreadie. "Development of twenty-three novel microsatellite markers for the seagrass, Zostera muelleri from Australia." Conservation Genetics Resources 4, no. 3 (March 1, 2012): 689–93. http://dx.doi.org/10.1007/s12686-012-9623-8.

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22

Li, Moyang, Carolyn J. Lundquist, Conrad A. Pilditch, T. A. V. Rees, and Joanne Ellis. "Implications of nutrient enrichment for the conservation and management of seagrass Zostera muelleri meadows." Aquatic Conservation: Marine and Freshwater Ecosystems 29, no. 9 (July 25, 2019): 1484–502. http://dx.doi.org/10.1002/aqc.3141.

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23

Kohlmeier, D., C. A. Pilditch, J. F. Bornman, and K. Bischof. "Adjustment of photoprotection to tidal conditions in intertidal seagrasses." Journal of the Marine Biological Association of the United Kingdom 97, no. 3 (August 30, 2016): 571–79. http://dx.doi.org/10.1017/s0025315416001090.

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Light adaptive strategies were studied in a comparative analysis of the congeneric seagrass species Zostera muelleri and Zostera marina at two case study areas in New Zealand and Germany. Surveys in intertidal seagrass meadows were conducted from pre-dawn until sunset on days when either low or high tide coincided with noon. The results show marked fluctuations of photophysiology (optimum and effective quantum yield, non-photochemical quenching, cycling of xanthophyll cycle (XC) pigments) over daily and tidal cycles. At both locations, we observed a near complete conversion (de-epoxidation) of violaxanthin to zeaxanthin at times with high irradiance and a rapid and complete re-epoxidation under subsequent lower light conditions. At the New Zealand site we also observed significantly larger XC-pigment pool sizes in seagrass leaves sampled in a week when low tide coincided with noon (larger daily fluence and higher maximum irradiance), compared with leaves sampled in a week when high tide was at noon. This dynamic adjustment of xanthophyll pool size has not been previously reported for intertidal seagrasses. It adds to our understanding of an important adaptive feature in a highly dynamic light environment and to the general ecology and adaptability of seagrasses.

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24

Zabarte-Maeztu, Iñigo, Fleur E. Matheson, Merilyn Manley-Harris, Robert J. Davies-Colley, and Ian Hawes. "Interaction of substrate muddiness and low irradiance on seagrass: A mesocosm study of Zostera muelleri." Aquatic Botany 175 (October 2021): 103435. http://dx.doi.org/10.1016/j.aquabot.2021.103435.

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25

Golicz, Agnieszka A., Martin Schliep, Huey Tyng Lee, Anthony W. D. Larkum, Rudy Dolferus, Jacqueline Batley, Chon-Kit Kenneth Chan, Gaurav Sablok, Peter J. Ralph, and David Edwards. "Genome-wide survey of the seagrass Zostera muelleri suggests modification of the ethylene signalling network." Journal of Experimental Botany 66, no. 5 (January 6, 2015): 1489–98. http://dx.doi.org/10.1093/jxb/eru510.

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26

Morris, Liz, Gregory Jenkins, David Hatton, and Timothy Smith. "Effects of nutrient additions on intertidal seagrass (Zostera muelleri) habitat in Western Port, Victoria, Australia." Marine and Freshwater Research 58, no. 7 (2007): 666. http://dx.doi.org/10.1071/mf06095.

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Loss of seagrass habitat in many parts of the world has been attributed to increases in nutrient loading to nearshore areas. The role of excess epiphyte, macroalgal or phytoplankton growth in shading of seagrass leaves and negatively affecting seagrass health is generally agreed to be a prevalent mechanism in seagrass decline worldwide. In the present study nutrient addition experiments were undertaken at three sites in Western Port, Victoria. Nutrients were added to the water column using the controlled release fertiliser Osmocote™ in late summer 2005. The experiments ran for one month at two of the sites (Blind Bight and Hastings) and at the third site (Crib Point) the experiment ran for three months. Control and nutrient addition plots were monitored for concentrations of inorganic nutrients, number of seagrass leaves, seagrass, epiphyte and loose algal biomass and invertebrate faunal assemblages. Nutrient additions had increased ash free dry weight of seagrass leaves and loose algae at two of the three sites studied. There was also an increase in gammarid amphipod densities at the Crib Point site. We consider that Western Port seagrass habitat is sensitive to increased loads of nutrients within the water column with the Blind Bight region most at risk.

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27

Buapet, Pimchanok, Nasim Shah Mohammadi, Mathieu Pernice, Manoj Kumar, Unnikrishnan Kuzhiumparambil, and Peter J. Ralph. "Excess copper promotes photoinhibition and modulates the expression of antioxidant-related genes in Zostera muelleri." Aquatic Toxicology 207 (February 2019): 91–100. http://dx.doi.org/10.1016/j.aquatox.2018.12.005.

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28

Ferguson, AJP, RK Gruber, M. Orr, and P. Scanes. "Morphological plasticity in Zostera muelleri across light, sediment, and nutrient gradients in Australian temperate coastal lakes." Marine Ecology Progress Series 556 (September 8, 2016): 91–104. http://dx.doi.org/10.3354/meps11830.

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29

Carter, R. J., and R. S. Eriksen. "Investigation into the use of Zostera muelleri (Irmisch ex Aschers) as a sentinel accumulator for copper." Science of The Total Environment 125 (September 1992): 185–92. http://dx.doi.org/10.1016/0048-9697(92)90390-e.

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30

Kerr, E. A., and S. Strother. "Seasonal changes in leaf growth rate of Zostera muelleri Irmisch ex Aschers. In South-Eastern Australia." Aquatic Botany 33, no. 1-2 (March 1989): 131–40. http://dx.doi.org/10.1016/0304-3770(89)90026-0.

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31

Leduc, Daniel, and P. Keith Probert. "Small-scale effect of intertidal seagrass (Zostera muelleri) on meiofaunal abundance, biomass, and nematode community structure." Journal of the Marine Biological Association of the United Kingdom 91, no. 3 (October 18, 2010): 579–91. http://dx.doi.org/10.1017/s0025315410001645.

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Seagrass beds are common features of coastal ecosystems worldwide, and their associated infauna are often more productive and diverse than in unvegetated habitats. Little is known, however, about the ecology of meiofaunal communities living in seagrass sediments. We compared the abundance and biomass of sediment meiofauna inside and outside an intertidalZostera muelleribed in southern New Zealand to assess the impact of seagrass cover on meiofaunal distribution. Nematode community structure, diversity, and feeding groups were also compared between habitats and sediment depths (0–2, 2–5 and 5–10 cm) to evaluate the effect of seagrass on nematode communities. Meiofaunal biomass was significantly higher inside than outside theZ. muelleribed, but secondary productivity inside the bed is likely to have been limited by the availability of labile organic matter. There were significant differences in nematode community structure between unvegetated, sparsely vegetated, and densely vegetated sites (102 m scale), as well as between sediment depths (cm scale). No significant differences were found in depth-integrated (0–10 cm) nematode diversity between sites, but vertical gradients in diversity differed between vegetated and unvegetated sites. Epistrate feeders were the most common feeding group in unvegetated sediments whereas most feeding groups were common inside the seagrass bed. Findings from this study indicate that seagrass beds can have a marked impact on infaunal structure and function over small spatial scales through their effect on sediment characteristics and organic matter input. Some unexpected trends observed in the present study, i.e. low meiofaunal biomass at the vegetated sites, and lower abundance of copepods inside than outside the seagrass bed, suggest that the nature of seagrass–invertebrate interactions may depend on habitat characteristics and the identity and ecology of species considered.

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32

Lohrer, Andrew M., Michael Townsend, Sarah F. Hailes, Iván F. Rodil, Katie Cartner, Daniel R. Pratt, and Judi E. Hewitt. "Influence of New Zealand cockles ( Austrovenus stutchburyi ) on primary productivity in sandflat-seagrass ( Zostera muelleri ) ecotones." Estuarine, Coastal and Shelf Science 181 (November 2016): 238–48. http://dx.doi.org/10.1016/j.ecss.2016.08.045.

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33

Skillington, A., N. Flint, A. Anastasi, G. Dwane, and E. L. Jackson. "Influence of variable salinity and low light on copper accumulation in the potential seagrass bioindicator, Zostera muelleri." Marine Pollution Bulletin 160 (November 2020): 111602. http://dx.doi.org/10.1016/j.marpolbul.2020.111602.

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34

Battley, P. F., D. S. Melville, R. Schuckard, and P. F. Ballance. "Zostera muelleri as a structuring agent of benthic communities in a large intertidal sandflat in New Zealand." Journal of Sea Research 65, no. 1 (January 2011): 19–27. http://dx.doi.org/10.1016/j.seares.2010.06.005.

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35

Kim, Mikael, Mathieu Pernice, Alexander Watson-Lazowski, Paul Guagliardo, Matt R. Kilburn, Anthony W. D. Larkum, John A. Raven, and Peter J. Ralph. "Effect of reduced irradiance on 13C uptake, gene expression and protein activity of the seagrass Zostera muelleri." Marine Environmental Research 149 (August 2019): 80–89. http://dx.doi.org/10.1016/j.marenvres.2019.06.004.

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36

Stafford-Bell, R. E., A. A. Chariton, and R. W. Robinson. "Prolonged buoyancy and viability of Zostera muelleri Irmisch ex Asch. vegetative fragments indicate a strong dispersal potential." Journal of Experimental Marine Biology and Ecology 464 (March 2015): 52–57. http://dx.doi.org/10.1016/j.jembe.2014.12.014.

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37

Ferguson, Angus J. P., Renee Gruber, Jaimie Potts, Aaron Wright, David T. Welsh, and Peter Scanes. "Oxygen and carbon metabolism of Zostera muelleri across a depth gradient – Implications for resilience and blue carbon." Estuarine, Coastal and Shelf Science 187 (March 2017): 216–30. http://dx.doi.org/10.1016/j.ecss.2017.01.005.

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38

Benham, Claudia F., Sara G. Beavis, and Emma L. Jackson. "Tolerance of tropical seagrasses Zostera muelleri and Halophila ovalis to burial: Toward an understanding of threshold effects." Estuarine, Coastal and Shelf Science 218 (March 2019): 131–38. http://dx.doi.org/10.1016/j.ecss.2018.11.005.

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39

Macreadie, Peter I., Paul H. York, and Craig D. H. Sherman. "Resilience of Zostera muelleri seagrass to small‐scale disturbances: the relative importance of asexual versus sexual recovery." Ecology and Evolution 4, no. 4 (January 21, 2014): 450–61. http://dx.doi.org/10.1002/ece3.933.

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40

Zabarte-Maeztu, Iñigo, Fleur E. Matheson, Merilyn Manley-Harris, Robert J. Davies-Colley, Megan Oliver, and Ian Hawes. "Effects of Fine Sediment on Seagrass Meadows: A Case Study of Zostera muelleri in Pāuatahanui Inlet, New Zealand." Journal of Marine Science and Engineering 8, no. 9 (August 21, 2020): 645. http://dx.doi.org/10.3390/jmse8090645.

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Seagrass meadows are vulnerable to fine sediment (mud) pollution, with impacts usually attributed to reduction in submerged light. Here we tested two non-exclusive hypotheses, that mud particles (<63 µm) impact seagrasses through both (1) the light climate and (2) changes in substrate physico-chemistry. We tested these hypotheses in Pāuatahanui Inlet, New Zealand, by comparing seagrass presence, abundance, and health, together with light climate and substrate physico-chemistry at contrasting habitats where (1) seagrass used to thrive but no longer grows (historical seagrass), (2) seagrass still persists (existing seagrass) and (3) seagrass has been present recently, but not currently (potential seagrass). Historical seagrass substrate had significantly higher mud (35% average), bulk density (1.5 g cm−3), porewater ammonium concentration (65 µM), and a more reduced redox profile (negative redox at only 2 cm soil depth) as well as a lower light availability when submerged compared to other habitats, while total daily light exposure differed little between habitats. This suggests that failure of seagrass to recolonize historical seagrass habitat reflects substrate muddiness and consequent unfavorable rhizosphere conditions. Our results provide evidence for the multi-stressor effects of fine sediment on seagrasses, with substrate suitability for seagrass being detrimentally affected even where light exposure seems sufficient.

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Stafford-Bell, Richard E., Anthony A. Chariton, and Randall W. Robinson. "Germination and early-stage development in the seagrass, Zostera muelleri Irmisch ex Asch. in response to multiple stressors." Aquatic Botany 128 (January 2016): 18–25. http://dx.doi.org/10.1016/j.aquabot.2015.09.004.

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42

Millhouse, Jenny, and Stanley Strother. "The effect of pH on the inorganic carbon source for photosynthesis in the seagrass Zostera muelleri irmisch ex aschers." Aquatic Botany 24, no. 2 (May 1986): 199–209. http://dx.doi.org/10.1016/0304-3770(86)90096-3.

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43

Kim, Mikael, Kasper Elgetti Brodersen, Milán Szabó, Anthony W. D. Larkum, John A. Raven, Peter J. Ralph, and Mathieu Pernice. "Low oxygen affects photophysiology and the level of expression of two-carbon metabolism genes in the seagrass Zostera muelleri." Photosynthesis Research 136, no. 2 (October 4, 2017): 147–60. http://dx.doi.org/10.1007/s11120-017-0452-1.

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44

Dos Santos, Virginie M., and Fleur E. Matheson. "Higher seagrass cover and biomass increases sexual reproductive effort: A rare case study of Zostera muelleri in New Zealand." Aquatic Botany 138 (February 2017): 29–36. http://dx.doi.org/10.1016/j.aquabot.2016.12.003.

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45

Connolly, RM. "A comparison of fish assemblages from seagrass and unvegetated areas of a southern Australian estuary." Marine and Freshwater Research 45, no. 6 (1994): 1033. http://dx.doi.org/10.1071/mf9941033.

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Assemblages of small fish from eelgrass (mainly Zostera muelleri) and unvegetated patches in a shallow, marine-dominated estuary were compared over one year as a preliminary step towards finding the consequences of eelgrass loss to small fish. There were more species and more individuals at eelgrass sites than at unvegetated sites at every sampling period. Multivariate analysis (MDS ordination) of assemblages showed distinct grouping of eelgrass and unvegetated sites. The statistical significance of groupings was tested by using an analysis of similarities (ANOSIM) randomization routine. The cryptic syngnathid Stigmatopora nigra and juvenile whiting, Sillaginodes punctata, the species of greatest economic importance in the estuary, were predominantly over eelgrass, whereas the flounder Rhombosolea tapirina was usually caught at unvegetated sites. Atherinosoma microstoma, the most abundant species, was more common over eelgrass at two dates but had similar abundances over both habitats at other dates. The limitations of survey work caused by possible associations between the presence of vegetation and environmental factors have been partially offset by interspersion of sites and by measurement of water temperature and salinity. Secondarily to habitat differences, fish assemblages were weakly grouped according to distance of sites from open water.

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Paavo, B. L., D. Ham, S. Görlitz, and P. K. Probert. "How does tidal submersion time affect macroinvertebrate community patterns on a temperate sheltered sandflat?" Marine and Freshwater Research 63, no. 1 (2012): 68. http://dx.doi.org/10.1071/mf11147.

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A general model of vertical zonation has been a fruitful foundation of rocky shore ecology, but no analogous model is widely accepted for intertidal soft sediments. Various local proxies have been used for shore height or tidal submersion time, although objective measurements are rare in the literature. In this study, temperature loggers identified submersion period (SP) in a sheltered temperate New Zealand inlet at discrete distances along transect vertical profiles associated with macrofaunal community differences. Our aim was to evaluate this submersion quantification method and determine whether SP described macrofaunal patterns. Despite the patchy presence of engineering species Zostera muelleri and Callianassa filholi, the method was effective in quantifying SP in an inlet with asymmetric tides and SP described spatial macroinvertebrate patterns well. Macrofaunal assemblages corresponded with shore height differences of ~100 mm and SP differences of ~10%. Observations distinguished assemblages submerged less than 30% of the time from those submerged >50% of the time with a continuous community gradient between. We suggest that future intertidal soft-sediment investigations should directly measure SP to: (1) adequately control for this influence when studying more obvious processes with subtle impacts; and (2) further a generic model of soft-sediment zonation.

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Ierodiaconou, Daniel A., and Laurie J. B. Laurenson. "Estimates of Heterozostera tasmanica, Zostera muelleri and Ruppia megacarpa distribution and biomass in the Hopkins Estuary, western Victoria, by GIS." Australian Journal of Botany 50, no. 2 (2002): 215. http://dx.doi.org/10.1071/bt00093.

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Knowledge of the spatial arrangement of the seagrass distribution and biomass within the Hopkins Estuary is an essential step towards gaining an understanding of the functioning of the estuarine ecosystem. This study marks the first attempt to map seagrass distribution and model seagrass biomass and epiphyte biomass along depth gradients by the use of global positioning system (GPS) and geographical information system (GIS) technologies in the estuary. For mapping seagrass in small estuaries, ground-surveying the entire system is feasible. Three species of seagrasses, Heterozostera tasmanica (Martens ex Aschers), Zostera muelleri (Irmisch ex Aschers) and Ruppia megacarpa (Mason), were identified in the Hopkins Estuary. All beds investigated contained a mixed species relationship. Three harvest techniques were trialed in a pilot study, with the 25 × 25-cm quadrat statistically most appropriate. Biomass of seagrasses and epiphytes was found to vary significantly with depth, but not between sites. The average estimate of biomass for total seagrasses and their epiphytes in the estuary in January 2000 was 222.7 g m–2 (dry weight). Of the total biomass, 50.6% or 112.7 g m–2 (dry weight) was contributed by seagrasses and 49.4% of the biomass (110.0 g m–2) were epiphytes. Of the 50.6% of the total biomass represented by seagrasses, 39.3% (87.5 g m–2) were leaves and 11.3% (25.2 g m–2) were rhizomes. The total area of seagrasses present in the Hopkins Estuary was estimated to be 0.4 ± 0.005 km2, with the total area of the estuary estimated to be 1.6 ± 0.02 km2 (25% cover). The total standing crop of seagrasses and epiphytes in the Hopkins Estuary in January 2000 was estimated to be 102.3 ± 57 t in dry weight, 56% (56.9 ± 17 t, dry weight) seagrasses and 44% (45.4 ± 19 t, dry weight) epiphytes. Of the seagrass biomass, 39% (39.7 ± 13 t, dry weight) was contributed by leaves and 17% (17.3 ± 7 t, dry weight) by rhizomes.

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York, Paul H., Renee K. Gruber, Ross Hill, Peter J. Ralph, David J. Booth, and Peter I. Macreadie. "Physiological and Morphological Responses of the Temperate Seagrass Zostera muelleri to Multiple Stressors: Investigating the Interactive Effects of Light and Temperature." PLoS ONE 8, no. 10 (October 4, 2013): e76377. http://dx.doi.org/10.1371/journal.pone.0076377.

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Bulmer, RH, S. Kelly, and AG Jeffs. "Light requirements of the seagrass, Zostera muelleri, determined by observations at the maximum depth limit in a temperate estuary, New Zealand." New Zealand Journal of Marine and Freshwater Research 50, no. 2 (April 2, 2016): 183–94. http://dx.doi.org/10.1080/00288330.2015.1120759.

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Booth, John D. "Recent (post-1930) changes in the extent of subtidal seagrass (Zostera muelleri) beds of the eastern Bay of Islands, New Zealand." New Zealand Journal of Marine and Freshwater Research 53, no. 1 (September 2, 2018): 113–27. http://dx.doi.org/10.1080/00288330.2018.1513409.

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