Abigail Powell

Abigail Powell
Lynker Technologies under contract to NOAA · Northwest Fisheries Science Center

PhD Marine Biology

About

21
Publications
9,252
Reads
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2,213
Citations
Introduction
I am an interdisciplinary marine ecologist with a background in sponge ecology. I am particularly interested in identifying the drivers of diversity in marine ecosystems and the application of new technologies to monitor changes in the marine environment. I have extensive experience using data collected with various observation systems (drop camera, Autonomous Underwater Vehicle, Remotely Operated Vehicle, observation buoy) to answer specific ecological and management-based questions.
Additional affiliations
June 2015 - November 2015
Institut de recherche pour le Dévelopment, Perpignan, France
Position
  • PostDoc Position
December 2013 - June 2015
Institut Français de Recherche pour l'Exploitation de la Mer
Position
  • PostDoc Position
Education
April 2008 - April 2013
Victoria University of Wellington
Field of study
  • Marine Biology
September 2005 - September 2006
University of Oxford
Field of study
  • Biodiversity, Conservation and Management
September 2001 - June 2004
Durham University
Field of study
  • Biology

Publications

Publications (21)
Article
Full-text available
Understanding the timing and reproductive behavior of commercial fish species is a key part of well-informed stock assessments and fishery management, but this information is often limited, particularly for species that spawn in deep water. Petrale sole (Eopsetta jordani) is one of the most commercially important flatfish species in the US and is k...
Preprint
In this paper, we present a methodology for fisheries-related data that allows us to converge on a labeled image dataset by iterating over the dataset with multiple training and production loops that can exploit crowdsourcing interfaces. We present our algorithm and its results on two separate sets of image data collected using the Seabed autonomou...
Article
Full-text available
Essential Biodiversity Variables (EBV) related to benthic habitats and high trophic levels such as fish communities must be measured at fine scale but monitored and assessed at spatial scales that are relevant for policy and management actions. Local scales are important for assessing anthropogenic impacts, and conservation-related and fisheries ma...
Research
Full-text available
NOAA Technical Memorandum describing the results of fish surveys (abundance and biomass estimates) carried out by autonomous underwater vehicle at two banks off California.
Technical Report
Full-text available
This study developed maps of the modeled spatial distributions of deepsea corals, sponges, and benthic macrofauna offshore of the continental US West Coast to 1,200 m depth. Occurrence data for deep-sea corals, sponges, and macrofauna and spatial environmental predictors depicting seafloor topography, substrate, oceanography, and geography were use...
Article
Offshore rocky banks are ecologically important refuge habitats for a number of U.S. commercial groundfish species. However, they are challenging to survey, and data on the abundance and ecology of fish populations at deep banks are limited. We used the remotely operated vehicle ROPOS to carry out visual surveys at two sites on Cherry Bank in the S...
Article
Full-text available
Deep-sea sponge grounds are relatively understudied ecosystems that may provide key habitats for a large number of fish and invertebrates including commercial species. Glass sponge grounds have been discovered from the tropics to polar regions but there are only a few places with high densities of dictyonine sponges. Dictyonine glass sponges have a...
Article
Full-text available
Marine protected areas (MPA) and in particular no-take marine reserves have been identified as important tools for the conservation of reef fish and habitats. A significant challenge of reef fish monitoring is to determine the influence of temporal factors on fish counts. Fish assemblages are dynamic and changes in activity patterns throughout the...
Article
Full-text available
Sponges are functionally important coral reef fauna and there is strong evidence from the Caribbean that predation has important impacts on sponge-assemblage dynamics; whether the same is true for Indo-Pacific sponges remains unknown. As a first step toward understanding the potential effects of spongivores on sponge diversity and abundance, we ide...
Chapter
In the original version, the name of the third author is incorrect. Instead of “Abigail Powel” it should be read as “Abigail Powell”.
Conference Paper
Marine Protected Areas (MPA) play a central role in policies for the conservation of coastal ecosystems and resources. One of the current challenges of monitoring the effectiveness of MPAs at protecting fish assemblages is distinguishing between the influence of habitat, protection effects and anthropogenic activities. We used strongly spatially-re...
Article
Full-text available
Although the frequency and magnitude of sedimentation often varies across coastal landscapes creating patches with different mean sediment loads, duration of sedimentation and rates of sediment resuspension, few studies have documented the emergent effects of spatio-temporal variability in sedimentation. Here, we conducted two laboratory experiment...
Article
Full-text available
Although coral reef health across the globe is declining as a result of anthropogenic impacts, relatively little is known of how environmental variability influences reef organisms other than corals and fish. Sponges are an important component of coral reef fauna that perform many important functional roles and changes in their abundance and divers...
Article
Sponges occupy a significant proportion of the available space in the shallow water coastal environments of the Wakatobi National Park (WNP) and, based on evidence from the park and from other reef ecosystems across the world, their high abundance means they are likely to be very important in reef ecosystem functioning. This chapter considers the f...
Article
Full-text available
Sponges are important components of reef communities worldwide, fulfilling a number of important functional roles. Habitat degradation caused by the loss of hard corals has the potential to cause increases in sponge abundance and percentage cover as they gain access to resources such as space and food. In this study we compared sponge densities and...
Article
Full-text available
Knowledge of mammalian diversity is still surprisingly disparate, both regionally and taxonomically. Here, we present a comprehensive assessment of the conservation status and distribution of the world's mammals. Data, compiled by 1700+ experts, cover all 5487 species, including marine mammals. Global macroecological patterns are very different for...
Article
Full-text available
Knowledge of mammalian diversity is still surprisingly disparate, both regionally and taxonomically. Here, we present a comprehensive assessment of the conservation status and distribution of the world's mammals. Data, compiled by 1700+ experts, cover all 5487 species, including marine mammals. Global macroecological patterns are very different for...
Article
The functional importance of herbivory is well established within terrestrial ecosystems yet within marine ecosystems, specifically seagrass beds, consumption by herbivores has generally been considered to be of little importance due to its minor contribution to turnover of growth. The present paper challenges this assumption within the Indo-Pacifi...
Article
This paper used the case study of the Wakatobi Marine National Park, Indonesia to examine changes in the diversity, density and maturity of grouper species over a 5-year period following the establishment of a small-scale no-take area (NTA). This work was carried out to investigate whether “small” NTAs could be effective management strategies over...

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Projects

Project (1)
Archived project
The AMBIO project aims at providing data and methodologies for a comprehensive assessment of biodiversity and resources (mostly fish and habitats) at the scale of New Caledonia. A large data set of 3000 observations have been collected, covering most NC reefs and associated habitats, using unbaited rotating underwater video (STAVIRO). Besides, data on uses and anthropogenic pressures in a large area surrounding the main city Noumea were collected and compiled in order to elaborate an integrated assessment accounting for both biodiversity, pressures and protection status.