LIVIVO - Search results -

Search results

Result 1 - 10 of total 60

Search options

Book ; Online: Chapter 4 The Oceanography and Marine Ecology of Ningaloo, A World Heritage Area

Vanderklift, Mathew A. / Babcock, Russell C. / Barnes, Peter B. / Cresswell, Anna K. / Feng, Ming / Haywood, Michael D. E. / Holmes, Thomas H. / Lavery, Paul S. / Pillans, Richard D. / Smallwood, Claire B. / Thomson, Damian P. / Tucker, Anton D. / Waples, Kelly / Wilson, Shaun K.

2020

Keywords	Marine biology ; Volume, Todd, Swearer, Smith, S, Russell, Review, P, OMBAR, Oceanography, Marine, L, I, Hawkins, Firth, Evans, Biology, Bates,B, Annual, Allcock
Size	1 Online-Ressource
Publisher	Taylor and Francis
Document type	Book ; Online
Note	English[eng] ; Open Access
HBZ-ID	HT021027040
ISBN	9780367524722 ; 0367524724
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: The influence of abiotic and biotic conditions on lifecycle stages is critical for estuarine seagrass resilience

Webster, Chanelle / Lavery, Paul S. / O’Dea, Caitlyn / Sánchez Alarcón, Marta / Salgado Kent, Chandra / McMahon, Kathryn

Mar Biol. 2023 Apr., v. 170, no. 4 p.48-48

2023

Abstract: Abiotic and biotic factors influence seagrass resilience, but the strength and relative importance of the effects are rarely assessed over the complete lifecycle. This study examined the effects of abiotic (salinity, temperature, water depth) and biotic ( ...

Abstract	Abiotic and biotic factors influence seagrass resilience, but the strength and relative importance of the effects are rarely assessed over the complete lifecycle. This study examined the effects of abiotic (salinity, temperature, water depth) and biotic (grazing by black swans) factors on Ruppia spp. over the complete lifecycle. Structures were set up in two estuaries (– 33.637020, 115.412608) that prevented and allowed natural swan grazing of the seagrasses in May 2019, before the start of the growing season. The density of life stage(s) was measured from June 2019 when germination commenced through to January 2020 when most of the seagrass senesced. Our results showed that swans impacted some but not all life stages. Seedling densities were significantly higher in the plots that allowed natural grazing compared to the exclusion plots (e.g. 697 versus 311 seedlings per m-2), revealing an apparent benefit of swans. Swans removed ≤ 10% of seagrass vegetation but a dormant seedbank was present and new propagules were also observed. We conclude that grazing by swans provides some benefit to seagrass resilience by enhancing seedling recruitment. We further investigated the drivers of the different lifecycle stages using general additive mixed models. Higher and more variable salinity led to increased seed germination whilst temperature explained variation in seedling density and adult plant abundance. Bet-hedging strategies of R. polycarpa were revealed by our lifecycle assessment including the presence of a dormant seedbank, germinated seeds and seedlings over the 8-month study period over variable conditions (salinity 2–42 ppt; temperatures 11–28 °C). These strategies may be key determinants of resilience to emerging salinity and temperature regimes from a changing climate.
Keywords	Ruppia ; climate ; estuaries ; life cycle assessment ; mature plants ; salinity ; seagrasses ; seed germination ; seedlings ; species recruitment ; swans ; temperature ; vegetation
Language	English
Dates of publication	2023-04
Size	p. 48.
Publishing place	Springer Berlin Heidelberg
Document type	Article ; Online
ZDB-ID	1117-4
ISSN	1432-1793 ; 0025-3162
ISSN (online)	1432-1793
ISSN	0025-3162
DOI	10.1007/s00227-023-04192-6
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 4' 69/153: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Ranking the risk of CO2 emissions from seagrass soil carbon stocks under global change threats

Dahl, Martin / McMahon, Kathryn / Lavery, Paul S. / Hamilton, Serena H. / Lovelock, Catherine E. / Serrano, Oscar

Global Environmental Change. 2023 Jan., v. 78 p.102632-

2023

Abstract: Seagrass meadows are natural carbon storage hotspots at risk from global change threats, and their loss can result in the remineralization of soil carbon stocks and CO₂emissions fueling climate change. Here we used expert elicitation and empirical ... ...

Abstract	Seagrass meadows are natural carbon storage hotspots at risk from global change threats, and their loss can result in the remineralization of soil carbon stocks and CO₂emissions fueling climate change. Here we used expert elicitation and empirical evidence to assess the risk of CO₂emissions from seagrass soils caused by multiple human-induced, biological and climate change threats. Judgments from 41 experts were synthesized into a seagrass CO₂ emission risk score based on vulnerability factors (i.e., spatial scale, frequency, magnitude, resistance and recovery) to seagrass soil organic carbon stocks. Experts perceived that climate change threats (e.g., gradual ocean warming and increased storminess) have the highest risk for CO₂ emissions at global spatial scales, while direct threats (i.e., dredging and building of a marina or jetty)have the largest CO₂emission risks at local spatial scales. A review of existing peer-reviewed literature showed a scarcity of studies assessing CO₂ emissions following seagrass disturbance, but the limited empirical evidence partly confirmed the opinion of experts. The literature review indicated that direct and long-term disturbances have the greatest negative impact on soil carbon stocks per unit area, highlighting that immediate management actions after disturbances to recover the seagrass canopy can significantly reduce soil CO₂ emissions. We conclude that further empirical evidence assessing global change threats on the seagrass carbon sink capacity is required to aid broader uptake of seagrass into blue carbon policy frameworks. The preliminary findings from this study can be used to estimate the potential risk of CO₂ emissions from seagrass habitats under threat and guide nature-based solutions for climate change mitigation.
Keywords	blue carbon ; canopy ; carbon dioxide ; carbon sequestration ; carbon sinks ; climate change ; expert opinion ; issues and policy ; risk ; risk assessment ; seagrasses ; soil ; soil organic carbon ; Climate change mitigation ; Anthropogenic activities ; Ecosystem service ; Policy ; Coastal management
Language	English
Dates of publication	2023-01
Publishing place	Elsevier Ltd
Document type	Article ; Online
Note	Use and reproduction
ZDB-ID	30436-0
ISSN	1056-9367 ; 0959-3780
ISSN	1056-9367 ; 0959-3780
DOI	10.1016/j.gloenvcha.2022.102632
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 5711: Show issues
Zs Allg GEC: Show issues
+ Gl 21: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article: Increased extent of waterfowl grazing lengthens the recovery time of a colonizing seagrass (

O'Dea, Caitlyn M / Lavery, Paul S / Webster, Chanelle L / McMahon, Kathryn M

Frontiers in plant science

2022 Volume 13, Page(s) 947109

Abstract: Herbivore distributions and abundance are shifting because of climate change, leading to intensified grazing pressure on foundation species such as seagrasses. This, combined with rapidly increasing magnitudes of change in estuarine ecosystems, may ... ...

Abstract	Herbivore distributions and abundance are shifting because of climate change, leading to intensified grazing pressure on foundation species such as seagrasses. This, combined with rapidly increasing magnitudes of change in estuarine ecosystems, may affect seagrass resilience. While the overall resilience of seagrasses is generally well-studied, the timeframes of recovery has received comparatively little attention, particularly in temperate estuaries. We investigated how the recovery time (RT) of seagrass is affected by simulated grazing in a southwestern Australian estuary. Whilst excluding swans, we simulated different grazing intensities (25, 50, 75, and 100% removal from 1 m
Language	English
Publishing date	2022-08-29
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2613694-6
ISSN	1664-462X
ISSN	1664-462X
DOI	10.3389/fpls.2022.947109
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Heterogeneous tidal marsh soil organic carbon accumulation among and within temperate estuaries in Australia

Gorham, Connor / Lavery, Paul S / Kelleway, Jeffrey J / Masque, Pere / Serrano, Oscar

Science of the total environment. 2021 Sept. 15, v. 787

2021

Abstract: The scarcity of data on tidal marsh soil accumulation rates (SAR) and soil organic carbon accumulation rates (CAR) globally precludes a comprehensive assessment of the role of tidal marshes in climate change mitigation and adaptation. Particularly few ... ...

Abstract	The scarcity of data on tidal marsh soil accumulation rates (SAR) and soil organic carbon accumulation rates (CAR) globally precludes a comprehensive assessment of the role of tidal marshes in climate change mitigation and adaptation. Particularly few data exist from the southern hemisphere and for Australia in particular, which contains ~24% of globally recognised tidal marsh extent. Here we estimate SAR and CAR over the last 70 years using ²¹⁰Pb-based geochronologies in temperate estuarine tidal marsh ecosystems in southern Western Australia (WA). Specifically, we assessed tidal marsh ecosystems situated in two geomorphic settings (marine vs. fluvial deltas) within 10 wave-dominated, barrier estuaries. Overall, average SAR (1.1 ± 0.3 mm yr⁻¹) and CAR (32 ± 9 g m⁻² yr⁻¹) estimates were 5-fold lower than global mean estimates. Furthermore, we showed that hotspots of soil organic carbon stocks are not indicative of current hotspots for CAR. The lack of significant differences (P > 0.05) in SAR, CAR, and excess ²¹⁰Pb inventories between marine and fluvial settings can be explained by the high heterogeneity among and within estuaries throughout the region. The relative stability of recent and Holocene relative sea-levels in WA likely explains the limited CAR potential in tidal marshes under relatively stable sea-level conditions. However, further research exploring interactions among biotic and abiotic factors within estuaries is required to shed more light on the small spatial-scale variability in SAR and CAR across tidal marsh ecosystems in WA and elsewhere. This study provides baseline estimates for the inclusion of tidal marshes in national carbon inventories, identifies hotspots for the development of blue carbon projects, and supports the use of site-specific assessments opposed to regional means for estimating blue carbon resources.
Keywords	Holocene epoch ; blue carbon ; climate change ; estuaries ; salt marshes ; sea level ; soil ; soil organic carbon ; Western Australia
Language	English
Dates of publication	2021-0915
Publishing place	Elsevier B.V.
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.147482
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 74/341: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Impact of seagrass establishment, industrialization and coastal infrastructure on seagrass biogeochemical sinks.

Serrano, Oscar / Lavery, Paul S / Bongiovanni, James / Duarte, Carlos M

Marine environmental research

2020 Volume 160, Page(s) 104990

Abstract: The study of a Posidonia sinuosa sedimentary archive has delivered a millenary record of environmental change in Cockburn Sound (Western Australia). Ecosystem change is a major environmental problem challenging sustainable coastal development worldwide, ... ...

Abstract	The study of a Posidonia sinuosa sedimentary archive has delivered a millenary record of environmental change in Cockburn Sound (Western Australia). Ecosystem change is a major environmental problem challenging sustainable coastal development worldwide, and this study shows baseline trends and shifts in ecological processes in coastal ecosystems under environmental stress. The concentrations and fluxes of biogeochemical elements over the last 3,500 years indicate that important changes in ecosystem dynamics occurred over the last 1,000 years, in particular after ~1900's, probably related to establishment of seagrass meadows in the area and to local and regional human activities (industry and coastal development), respectively. The establishment of seagrasses ~1,000 years ago in the area of study is supported by the appearance of Posidonia fibres from ~40 cm soil depth until the core top, higher δ
MeSH term(s)	Carbon ; Ecosystem ; Geologic Sediments ; Industrial Development ; Soil
Chemical Substances	Soil ; Carbon (7440-44-0)
Language	English
Publishing date	2020-04-21
Publishing country	England
Document type	Journal Article
ZDB-ID	1502505-6
ISSN	1879-0291 ; 0141-1136
ISSN (online)	1879-0291
ISSN	0141-1136
DOI	10.1016/j.marenvres.2020.104990
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Impact of seagrass establishment, industrialization and coastal infrastructure on seagrass biogeochemical sinks

Serrano, Oscar / Lavery, Paul S / Bongiovanni, James / Duarte, Carlos M

Marine environmental research. 2020 Sept., v. 160

2020

Abstract	The study of a Posidonia sinuosa sedimentary archive has delivered a millenary record of environmental change in Cockburn Sound (Western Australia). Ecosystem change is a major environmental problem challenging sustainable coastal development worldwide, and this study shows baseline trends and shifts in ecological processes in coastal ecosystems under environmental stress. The concentrations and fluxes of biogeochemical elements over the last 3,500 years indicate that important changes in ecosystem dynamics occurred over the last 1,000 years, in particular after ~1900's, probably related to establishment of seagrass meadows in the area and to local and regional human activities (industry and coastal development), respectively. The establishment of seagrasses ~1,000 years ago in the area of study is supported by the appearance of Posidonia fibres from ~40 cm soil depth until the core top, higher δ13C values indicating a larger contribution of seagrass-matter to the soil organic carbon pool, and increased concentration of fine sediments driven by the effect of seagrass canopy in enhancing sedimentation. The comparison of organic carbon, nutrients and metal concentrations and fluxes between pre- and post-establishment of seagrasses shows that seagrass establishment resulted in up to 9-fold increase in the soil biogeochemical sink. In ~1900's, shifts in the concentrations of metals, carbonates, organic carbon, sediment grain size, and δ13C and δ15N values of the organic matter were detected, demonstrating an alteration in seagrass ecosystem functioning following the onset of European settlement. Anthropogenic activities, and in particular the construction of a causeway in 1970's, enhanced seagrass soil organic carbon and metal accumulation rates by 36- and 39-fold, respectively, showing that human-made structures can enhance the biogeochemical sink capacity of seagrasses. Here we reconstruct the impact of human activities on seagrass ecosystem dynamics and blue carbon, which can inform local management of Cockburn Sound and seagrass conservation for climate change mitigation and adaptation.
Keywords	Posidonia ; anthropogenic activities ; blue carbon ; canopy ; carbon sinks ; carbonates ; climate change ; coastal ecosystems ; ecological footprint ; industrialization ; industry ; infrastructure ; metals ; nitrogen ; nutrients ; seagrasses ; sediments ; soil depth ; soil organic carbon ; stable isotopes ; Western Australia
Language	English
Dates of publication	2020-09
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	1502505-6
ISSN	1879-0291 ; 0141-1136
ISSN (online)	1879-0291
ISSN	0141-1136
DOI	10.1016/j.marenvres.2020.104990
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article ; Online: Response of the seagrass Halophila ovalis to altered light quality in a simulated dredge plume.

Strydom, Simone / McMahon, Kathryn / Lavery, Paul S

Marine pollution bulletin

2017 Volume 121, Issue 1-2, Page(s) 323–330

Abstract: Seagrass meadows are globally threatened, largely through activities that reduce light quantity (photosynthetic photon flux density) such as dredging. However, these activities can simultaneously alter the spectral quality of light. Previous studies ... ...

Abstract	Seagrass meadows are globally threatened, largely through activities that reduce light quantity (photosynthetic photon flux density) such as dredging. However, these activities can simultaneously alter the spectral quality of light. Previous studies showed that Halophila ovalis seagrass productivity is reduced under monochromatic yellow/green light, wavelengths associated with dredge plumes, but it is unclear how they respond to spectra produced by real dredging projects. We simultaneously subjected adult H. ovalis plants to altered light quality and quantity simulating a real commercial dredging operation (15mgL
Language	English
Publishing date	2017-08-15
Publishing country	England
Document type	Journal Article
ZDB-ID	2001296-2
ISSN	1879-3363 ; 0025-326X
ISSN (online)	1879-3363
ISSN	0025-326X
DOI	10.1016/j.marpolbul.2017.05.060
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Millennial-scale changes in the molecular composition of Posidonia australis seagrass deposits: Implications for Blue Carbon sequestration

Kaal, Joeri / Serrano, Oscar / Martínez Cortizas, Antonio / Baldock, Jeffrey A / Lavery, Paul S

Organic geochemistry. 2019 July 14,

2019

Abstract: Seagrass ecosystems are recognised for their role in climate change mitigation, due to their capacity to form organic-rich sediments. The chemical recalcitrance of seagrass organs is one characteristic driving carbon storage, but the molecular background ...

Abstract	Seagrass ecosystems are recognised for their role in climate change mitigation, due to their capacity to form organic-rich sediments. The chemical recalcitrance of seagrass organs is one characteristic driving carbon storage, but the molecular background of this feature is poorly understood. We assessed molecular composition changes of Posidonia australis sheaths (SH) and roots plus rhizomes (RR) along a sediment core, encompassing 3200 cal. yr BP, by means of nuclear magnetic resonance spectroscopy (13C NMR), conventional analytical pyrolysis (Py-GC–MS) and thermally assisted hydrolysis and methylation (THM-GC–MS). Significant trends with depth (age) in the composition of both SH and RR remains of P. australis were observed from all methods. In general terms, polysaccharides become depleted (degraded) and lignin enriched (selectively preserved) as age increases, and the minor constituents cutin, suberin and condensed tannin are also preferentially depleted during ageing in both fractions. Molecular changes with ageing were smaller in SH, especially regarding polysaccharides, indicative of a superior stability compared to RR. The molecular changes observed are most pronounced within the first 75 cm of the record, which reflects the recalcitrance of P. australis detritus once it is buried below that depth (corresponding to approximately 700 cal. yr BP). The capacity of P. australis to act as a long-term carbon sink seems to be mainly related to the resistance of buried lignocellulose materials to decomposition. The results on diagenetic effects on the molecular fingerprint of seagrass detritus contribute to our understanding of carbon sequestration in Blue Carbon ecosystems. Furthermore, data comparison of the methods applied using principal component analysis (PCA) allowed us to identify consistencies, discrepancies and complementarities.
Keywords	Posidonia ; blue carbon ; carbon sequestration ; carbon sinks ; climate change ; cutin ; detritus ; ecosystems ; gas chromatography-mass spectrometry ; hydrolysis ; lignin ; lignocellulose ; methylation ; nuclear magnetic resonance spectroscopy ; principal component analysis ; proanthocyanidins ; pyrolysis ; rhizomes ; roots ; seagrasses ; sediments ; stable isotopes ; suberin
Language	English
Dates of publication	2019-0714
Publishing place	Elsevier Ltd
Document type	Article
Note	Pre-press version
ISSN	0146-6380
DOI	10.1016/j.orggeochem.2019.07.007
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Organic chemistry insights for the exceptional soil carbon storage of the seagrass Posidonia australis

Serrano, Oscar / Rozaimi, Mohammad / Lavery, Paul S. / Smernik, Ronald J.

2020

Abstract: The high organic carbon (OC) stores in seagrass meadows have led to their recognition as significant Blue Carbon sinks, though the diagenetic conditions that enable OC retention in seagrass soils remain poorly understood. In this study, seagrass soils ... ...

Abstract	The high organic carbon (OC) stores in seagrass meadows have led to their recognition as significant Blue Carbon sinks, though the diagenetic conditions that enable OC retention in seagrass soils remain poorly understood. In this study, seagrass soils were sampled from a Posidonia australis meadow in Oyster Harbour (Albany; south-western Australia) to investigate the preservation of sedimentary OC. We analysed soil characteristics (colour, grain size and redox potential), radiocarbon age, and characterised the soil organic matter (OM) using solid state CP/MAS 13C NMR spectroscopy to examine the preservation of OM down the soil profile. There was minimal change in organic composition over 1,700 years of accumulation, indicating long-term OM preservation. Primarily, this preservation appears to be driven by the recalcitrance of seagrass detritus buried in anoxic soils. The majority (70–83%) of total sedimentary OM comprised components directly attributable to seagrass origins (lignin, carbohydrate and black carbon-like matter), while the remainder consisted mostly of protein, some of which may have been present in seagrass biomass, along with likely contributions from algae and microbes. Although black carbon originates from organic matter combustion, here we provide evidence that the 13C NMR signal identified as black carbon-like matter in our soils is possibly associated with seagrass-derived organic matter consisting of degraded lignin products or other non-pyrogenic aromatics. The increase in the relative abundance of this black carbon-like matter with aging suggests its selective preservation. The relative abundances of carbohydrates significantly decreased with age down core (i.e. they appeared to be selectively decomposed), while lignin and protein did not show any quantitative changes in relative abundance (non-selective preservation). These findings demonstrate the exceptional preservation of P. australis derived OC, which contributes to our understanding of the higher OC storage capacity of Posidonia ...
Subject code	550
Language	English
Publisher	Elsevier
Publishing country	de
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED