Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/20144
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: The spatial dynamics of vertical migration by Microcystis aeruginosa in a eutrophic shallow lake: A case study using high spatial resolution time-series airborne remote sensing
Authors: Hunter, Peter
Tyler, Andrew
Willby, Nigel
Gilvear, David
Contact Email: p.d.hunter@stir.ac.uk
Keywords: ACCUMULATION
aggregation
algorithm
Algorithms
CASE studies
Development
DYNAMICS
environment
HIGH-SPATIAL-RESOLUTION
IMAGE
Imagery
IMAGES
IMPROVEMENT
IMPROVEMENTS
LAKE
Light
migration
NOV
NUTRIENT
PERIOD
PERSISTENCE
REGION
regions
REMOTE sensing
Spatial
spatial resolution
SPATIAL-RESOLUTION
time
time series
TIME-SERIES
TRANSIENT
United Kingdom
WATER
Issue Date: 2008
Publisher: American Society of Limnology and Oceanography
Citation: Hunter P, Tyler A, Willby N & Gilvear D (2008) The spatial dynamics of vertical migration by Microcystis aeruginosa in a eutrophic shallow lake: A case study using high spatial resolution time-series airborne remote sensing, Limnology and Oceanography, 53 (6), pp. 2391-2406.
Abstract: Abstract: Time-series airborne remote sensing was used to monitor diurnal changes in the spatial distribution of a bloom of the potentially toxic cyanobacterium Microcystis aeruginosa in the shallow eutrophic waters of Barton Broad, United Kingdom. High spatial resolution images from the Compact Airborne Spectrographic Imager (CASI-2) were acquired over Barton Broad on 29 August 2005 at 09:30 h, 12:00 h, and 16:00 h Greenwich mean time. Semiempirical water-leaving radiance algorithms were derived for the quantification of chlorophyll a (R2 = 0.96) and C-phycocyanin (R2 = 0.95) and applied to the CASI-2 imagery to generate dynamic, spatially resolving maps of the M. aeruginosa bloom. The development of the bloom may have been fostered by a combination of the recent improvements in the ambient light environment of Barton Broad, allied to the acute depletion of bioavailable nutrient pools, and stable hydrodynamic conditions. The vertical distribution of M. aeruginosa was highly transient; buoyant colonies formed early morning and late afternoon near-surface aggregations across the lake during periods of nonturbulent mixing (wind speed <4 m s-1). However, the extent of these near-surface aggregations was highly spatially variable, and nearshore morphometry appeared to be crucial in creating localized regions of nonturbulent water in which pronounced and persistent near-surface aggregations were observed. The formation of these near-surface scums would have been vital in alleviating light starvation in the turbid waters of Barton Broad. The calm water refuges in which persistent near-surface accumulations occurred may have been an important factor in determining the persistence of the bloom.
Type: Journal Article
URI: http://hdl.handle.net/1893/20144
DOI Link: http://dx.doi.org/10.4319/lo.2008.53.6.2391
Rights: Publisher policy allows this work to be made available in this repository. Published in Limnology and Oceanography 53(6), 2008, 2391-2406 by Association for the Sciences of Limnology and Oceanography (ASLO). The original publication is available at: http://www.aslo.org/lo/toc/vol_53/issue_6/2391.html
Affiliation: Biological and Environmental Sciences
Biological and Environmental Sciences
Biological and Environmental Sciences
Biological and Environmental Sciences

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