Nicole Hill

University of Tasmania

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NS Barrett

University of Tasmania

VL Lucieer

University of Tasmania

Graham J. Edgar

University of Tasmania

Scott D. Foster

Commonwealth Scientific and Industrial Research Organisation

Russell Thomson

Western Sydney University

Rick D. Stuart‐Smith

University of Tasmania

Rebecca Leaper

Australian Antarctic Division

Scott Nichol

Geoscience Australia

Craig R. Johnson

University of Tasmania

Piers K. Dunstan

CSIRO Oceans and Atmosphere

Cooperative Institutions

University of Tasmania

CSIRO Oceans and Atmosphere

John Wiley & Sons (United States)

Australian Antarctic Division

Commonwealth Scientific and Industrial Research Organisation

Ecological Society of America

University of Sydney

Consejo Superior de Investigaciones Científicas

Australian Institute of Marine Science

University of California, San Francisco

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Submarine sedimentary bedforms and benthos surrounding the Heard and McDonald Islands World Heritage site

Elsevier eBooks (2019)

Sally Watson VL Lucieer Joanne M. Whittaker J. M. Fox Nicole Hill

Bedform

Deglaciation

Benthos

Paleocurrent

10.1016/b978-0-12-814960-7.00042-7

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Citations (1)

The potential of trait-based approaches to contribute to marine conservation

Marine Policy (2014)

Rick D. Stuart‐Smith Amanda E. Bates Jonathan S. Lefcheck J. Emmett Duffy Susan C. Baker

Marine conservation

Trait

Marine protected area

10.1016/j.marpol.2014.07.002

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Citations (11)

An experimental assessment of impacts of pollution sources on sessile biota in a temperate urbanised estuary

Marine Pollution Bulletin (2018)

Amelia E. Fowles Graham J. Edgar Nicole Hill Rick D. Stuart‐Smith JB Kirkpatrick

Biota

Ulvophyceae

10.1016/j.marpolbul.2018.05.040

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Citations (7)

Integrating abundance and functional traits reveals new global hotspots of fish diversity

Nature (2013)

Rick D. Stuart‐Smith Amanda E. Bates Jonathan S. Lefcheck J. Emmett Duffy Susan C. Baker

Biodiversity hotspot

Global biodiversity

Gamma diversity

10.1038/nature12529

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Citations (522)

Subsurface chlorophyll maxima reduce the performance of non-photochemical quenching corrections in the Southern Ocean

Frontiers in Marine Science (2024)

Kimberlee Baldry Peter G. Strutton Nicole Hill Philip W. Boyd

Non-photochemical quenching (NPQ) within phytoplankton cells often causes the daytime suppression of chlorophyll fluorescence in the Southern Ocean. This is problematic and requires accurate correction when chlorophyll fluorescence is used as a proxy for chlorophyll-a concentration or phytoplankton abundance. In this study, we reveal that Southern Ocean subsurface chlorophyll maxima (SCMs) are the largest source of uncertainty when correcting for NPQ of chlorophyll fluorescence profiles. A detailed assessment of NPQ correction methods supports this claim by taking advantage of coincident chlorophyll fluorescence and chlorophyll concentration profiles. The best performing NPQ correction methods are conditional methods that consider the mixed layer depth (MLD), subsurface fluorescence maximum (SFM) and depth of 20% surface light. Compared to existing methods, the conditional methods proposed halve the bias in corrected chlorophyll fluorescence profiles and improve the success of replicating a SFM relative to chlorophyll concentration profiles. Of existing methods, the X12 and P18 methods, perform best overall, even when considering methods supplemented by beam attenuation or backscatter data. The widely-used S08 method, is more varied in its performance between profiles and its application introduced on average up to 2% more surface bias. Despite the significant improvement of the conditional method, it still underperformed in the presence of an SCM due to 1) changes in optical properties at the SCM and 2) large gradients of chlorophyll fluorescence across the pycnocline. Additionally, we highlight that conditional methods are best applied when uncertainty in chlorophyll fluorescence yields is within 50%. This highlights the need to better characterize the bio-optics of SCMs and chlorophyll fluorescence yields in the Southern Ocean, so that chlorophyll fluorescence data can be accurately converted to chlorophyll concentration in the absence of in situ water sampling.

Maxima

10.3389/fmars.2023.1302999

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Citations (1)

Quantifying wave exposure in shallow temperate reef systems: applicability of fetch models for predicting algal biodiversity

Marine Ecology Progress Series (2010)

Nicole Hill AR Pepper Marji Puotinen Michael G. Hughes Graham J. Edgar

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 417:83-95 (2010) - DOI: https://doi.org/10.3354/meps08815 Quantifying wave exposure in shallow temperate reef systems: applicability of fetch models for predicting algal biodiversity Nicole A. Hill1,*, Austen R. Pepper1, 4, Marji L. Puotinen2, 5, Michael G. Hughes3, 6, Graham J. Edgar1, Neville S. Barrett1, Rick D. Stuart-Smith1, Rebecca Leaper1 1Tasmanian Aquaculture and Fisheries Institute, University of Tasmania, Private Bag 49, Hobart, Tasmania 7001, Australia 2Institute for Conservation Biology and Environmental Management and School of Earth and Environmental Sciences, University of Wollongong, Wollongong, New South Wales 2522, Australia 3Marine & Coastal Environment Group, Geoscience Australia, GPO Box 378, Canberra ACT 2601, Australia 4Present address: New South Wales State Emergency Service, Level 3, 6 – 8 Regent Street, Wollongong, New South Wales 2500, Australia 5Present address: School of Earth Sciences, The Ohio State University, 125 South Oval Mall, Columbus, Ohio 43210, USA 6Present address: School of Geosciences, University of Sydney, Sydney, New South Wales 2006, Australia *Email: nicole.hill@utas.edu.au ABSTRACT: Management and conservation of ecosystems relies on biodiversity data; however, broad-scale biological data are often limited. Predictive modelling using environmental variables has recently proven a valuable tool in addressing this gap. Wave exposure is a particularly important environmental variable that structures shallow reef systems, but it is rarely quantified across the large areas often used for predictive studies. Therefore, we investigated approaches that quantify exposure and can be readily applied across a large area. We generated 6 quantitative indices that emphasise different aspects of exposure using a numerical wave model and cartographic fetch models. The utility of these indices for predictive modelling in shallow temperate reef systems was assessed by how well they explained community and genera-level algal patterns in Tasmania, Australia, which is a region that experiences a wide range of wave exposure conditions. Exposure indices were significant predictors of algal patterns, explaining up to 18% of community level patterns and up to 37% of the variance associated with the occurrence and cover of algal genera. Fetch-based indices in particular appear to be a viable option for quantifying exposure on shallow reefs. These indices can be generated within a Geographic Information System (GIS) program for specific sites of interest, along coastlines or on a grid, and are potentially accessible to ecologists. Quantification of exposure across broad regions using fetch indices will allow ecologists to makes advances in predictive modelling studies, but also facilitate studies that test the generality of hypotheses and mechanisms driving patterns previously observed using qualitative measures. KEY WORDS: Wave exposure index · Cartographic fetch modelling · Macro-algae · Biodiversity · Predictive models Full text in pdf format Supplementary material PreviousNextCite this article as: Hill NA, Pepper AR, Puotinen ML, Hughes MG and others (2010) Quantifying wave exposure in shallow temperate reef systems: applicability of fetch models for predicting algal biodiversity. Mar Ecol Prog Ser 417:83-95. https://doi.org/10.3354/meps08815Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 417. Online publication date: November 04, 2010 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2010 Inter-Research.

Fetch

10.3354/meps08815

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Citations (68)

Remote sensing of Antarctic polychaete reefs (Serpula narconensis): reproducible workflows for quantifying benthic structural complexity with action cameras, remotely operated vehicles and structure‐from‐motion photogrammetry

Remote Sensing in Ecology and Conservation (2023)

Juan C. Montes‐Herrera Nicole Hill Vonda J. Cummings Glenn Johnstone Jonathan S. Stark

Abstract Quantifying the structural complexity provided by biogenic habitat structures is important in ecology, conservation and management, and yet remains a challenging task, particularly in deep sea and polar environments, that current photogrammetry tools can alleviate. In this study, we demonstrate how small remotely operated vehicles and compact underwater GoPro® action cameras can be easily integrated into coastal Antarctic surveys to quantify structural complexity of under‐ice benthos via underwater photogrammetry. Forty‐four pairs of 1 m 2 quadrats at 1 cm resolution, each comprising an orthomosaic and three‐dimensional reconstructions, were analyzed to describe relationships between benthic cover and structural complexity metrics. The study case provided insights into a unique biogenic habitat, highlighting the role of integrating structural complexity metrics in Antarctic benthic surveys. Although no clear relationships between structural complexity and biodiversity were found, high cover of live reef‐building polychaetes was associated with higher levels of structural complexity, particularly fractal dimension ( D ). Further, broken biogenic structures, product of disturbance events retain habitat structural complexity known to be associated with larvae settlement and biogenic reef growth. This suggests that D can be used as a metric for detecting subtle changes in biogenic structural complexity. We build from available open‐source code, a reproducible scientific workflow that is expected to facilitate the acquisition and analysis of structural complexity metrics. The workflow presented aims to encourage and accelerate the use of photogrammetry tools for benthic studies aiming to quantify biogenic structural complexity across depths and latitudes.

Structural complexity

10.1002/rse2.358

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Citations (3)

Characterizing managing physicians by claims sequences in episodes of care

Journal of Biomedical Informatics (2021)

Lauren L. Staples Morgan Tamayo Bryan D. Yockey Jessica Rudd Nicole Hill

Reimbursement

Value-Based Purchasing

10.1016/j.jbi.2021.103759

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Citations (0)

The Antarctic Seafloor Annotated Imagery Database

bioRxiv (Cold Spring Harbor Laboratory) (2023)

Jan Jansen Victor Shelamoff Charley Gros T. Andrew Windsor Nicole Hill

Abstract Marine imagery is a comparatively cost-effective way to collect data on seafloor organisms, biodiversity and habitat morphology. However, annotating these images to extract detailed biological information is time-consuming and expensive, and reference libraries of consistently annotated seafloor images are rarely publicly available. Here, we present the Antarctic Seafloor Annotated Imagery Database (AS-AID), a result of a multinational collaboration to collate and annotate regional seafloor imagery datasets from 19 Antarctic research cruises between 1985 and 2019. AS-AID comprises of 3,599 georeferenced downward facing seafloor images that have been labelled with a total of 615,051 expert annotations. Annotations are based on the CATAMI (Collaborative and Automated Tools for Analysis of Marine Imagery) classification scheme and have been reviewed by experts. In addition, because the pixel location of each annotation within each image is available, annotations can be viewed easily and customised to suit individual research priorities. This dataset can be used to investigate species distributions, community patterns, it provides a reference to assess change through time, and can be used to train algorithms to automatically detect and annotate marine fauna.

Seafloor Spreading

Georeference

10.1101/2023.02.16.528770

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Citations (3)

Defining and observing stages of climate-mediated range shifts in marine systems

Global Environmental Change (2014)

Amanda E. Bates GT Pecl SD Frusher Alistair J. Hobday Thomas Wernberg

10.1016/j.gloenvcha.2014.03.009

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Citations (251)