NDLI: Can a Rapid Underwater Video Approach Enhance the Benthic Assessment Capability of the National Coastal Condition Assessment in the Great Lakes?

Content Provider	Springer Nature Link
Author	Lietz, Julie E. Kelly, John R. Scharold, Jill V. Yurista, Peder M.
Copyright Year	2015
Abstract	Over 400 sites were sampled in the nearshore of the U.S. Great Lakes during the U.S. National Coastal Condition Assessment (NCCA) field survey in summer 2010. Underwater video images were recorded in addition to routine NCCA benthic assessment measures. This paper has two objectives: (1) to develop a process to evaluate video performance with acceptance criteria, exploring reasons for poor images, and (2) to use acceptable videos in an example application with invasive mussels, evaluating the enhancement potential of video to supplement traditional grab sampling. A standard hierarchical protocol was developed to rank video performance based on quality and clarity. We determined controllable and uncontrollable factors affecting video performance. Moreover, specific thresholds limiting video were identified: >0.5/m for light extinction and >3.5 µg/L for chlorophyll a concentration. To demonstrate the utility and enhancement potential of video sampling, observed dreissenid presence from excellent (221 of 362 videos) videos was compared with NCCA benthic taxonomy, in the context of the statistically based NCCA survey. Including video increased the overall area estimate of the U.S. Great Lakes nearshore with invasive mussels by about 15 % compared to PONAR alone; 44 % (7570 km2) of the surveyed region had mussels. The proportion of the nearshore area having mussels varied from low (3.5 %) in Lake Superior to >50 % in the lower lakes. PONAR and video have unique strengths and weaknesses as sampling tools in the Great Lakes nearshore environment, but when paired were complimentary and thus provided a more thorough benthic condition assessment at lake and regional scales.
Starting Page	1446
Ending Page	1456
Page Count	11
File Format	PDF
ISSN	0364152X
Journal	Environmental Management
Volume Number	55
Issue Number	6
e-ISSN	14321009
Language	English
Publisher	Springer US
Publisher Date	2015-04-02
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Underwater video National coastal condition assessment Benthic condition Dreissenid mussels PONAR Environmental Management Ecology Nature Conservation Atmospheric Protection/Air Quality Control/Air Pollution Forestry Management Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Ecology Pollution Global and Planetary Change

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