TITLE

QUADRAT VS. VIDEO ASSESSMENT OF MACROALGAE COVER: A METHODS COMPARISON

AUTHOR(S)
PROVOST, KELEIGH; MARTIGNETTE, A. J.; MILBRANDT, ERIC; SIWICKE, J.
PUB. DATE
March 2013
SOURCE
Florida Scientist;Spring2013, Vol. 76 Issue 2, p249
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In 2004-2007, the beaches of Sanibel Island, Florida, were affected by large drifts of macroalgae that accumulated on shore. The adjacent seafloor is composed of three ecoregions: inshore, nearshore and offshore. To measure attached and unattached macroalgae on various substrata, two field survey methods were compared from 2008 to 2010 along thirteen 100 m long transects. One method used visual assessments of macroalgae in 1 m² quadrats along the transects and one used an underwater camcorder to capture video footage along the transects. Results of each method were converted to percent cover of the transect and compared for each sampling date. The results showed that digital video observations were not significantly different than diver assessments for two of three ecoregions. Sparse amounts of macroalgae were underestimated nearshore using visual SCUBA, due to the inconsistent, but high percentage, of algae cover. Uses, advantages, disadvantages, and time-effectiveness of the two methods were compared. Natural resource managers can choose which survey method meets their scientific, management and budget needs. Based on these results, it is suggested that video analysis of bottom cover is a practical method for rapid, widespread assessment of macroalgae abundance surrounding Sanibel Island.
ACCESSION #
87631674

 

Related Articles

  • MEGAFAUNAL DIVERSITY ASSOCIATED WITH DEEP-SEA NODULE-BEARING HABITATS IN THE EASTERN PART OF THE CLARION-CLIPPERTON ZONE, NE PACIFIC. Stoyanova, Valcana // Proceedings of the International Multidisciplinary Scientific Ge;2012, Vol. 1, p645 

    The abundance, composition and spatial distribution of megafauna were assessed quantitatively from seafloor photographic transects carried out in July 2009 by the Interoceanmetal Joint Organization (IOM). Studied area is located in the eastern part of Clarion-Clipperton Zone, NE Pacific...

  • Trouble with Tribbles.  // Natural History;Jan92, Vol. 101 Issue 1, p84 

    Presents a photograph of a white sea urchins, eating a starfish. Job of the urchins to strip the ocean bottom of algae.

  • Primary production and fluxes of organic carbon to the seabed in the Eurasian arctic seas, 2003-2012. Vetrov, A.; Romankevich, E. // Doklady Earth Sciences;Jan2014, Vol. 454 Issue 1, p44 

    The primary production and fluxes of organic matter to the seabed and their variations were estimated in the Greenland, Barents, Kara, Laptev, East Siberian, and Chukchi seas in 2003-2012 on the basis of satellite and in situ data. When counting the open water area with the assumptions made for...

  • Seasonal Dynamics of a Microtidal Pocket Beach with Posidonia oceanica Seabeds (Mallorca, Spain). Basterretxea, G.; Orfila, A.; Jordi, A.; Casas, B.; Lynett, P.; Liu, P. L. F.; Duarte, C. M.; Tintoré, J. // Journal of Coastal Research;Fall2004, Vol. 20 Issue 4, p1155 

    In this work, we analyze the 'seasonal evolution of a Mediterranean pocket beach and its response to different storm episodes. Magalluf, an intermediate medium sand beach located in the Bay of Palma (Balearic Islands) was monitored by topographic levelling during 14 months. Near the beach, a...

  • Influence of volcanic ash sediments on spore adhesion of the red alga Gelidium elegans from the coastal seabed around Miyakejima Island, Japan. Arakawa, Hisayuki; Ohi, Yohei; Matsumoto, Akira; Takio, Kenji; Kimoto, Takumi; Kawabe, Katsutoshi // Fisheries Science;Sep2012, Vol. 78 Issue 5, p1083 

    The populations of red alga Gelidium elegans along the coast of Miyakejima Island were severely damaged by a volcanic eruption in 2000. The effect of this volcanic eruption has been long lasting, and populations of this red alga still have not recovered. We investigated the effect of seabed...

  • Fucoxanthin of the brown alga Cystoseira barbata (Stackh.) C. Agardh from the Black Sea. Ryabushko, Vitaly I.; Prazukin, Alexander V.; Popova, Elena V.; Nekhoroshev, Mikhail V. // Journal of the Black Sea/Mediterranean Environment;2014, Vol. 20 Issue 2, p108 

    Quantitative determination of fucoxanthin was made in the ontogenetic series of 1st order branches of the brown alga Cystoseira barbata (Stackh.) C. Agardh growing in upper sublittoral zone of Martyn Bay (Black Sea coast of Crimea). The greatest content (3 mg/g dry mass) was characteristic of...

  • The dead zones. Schrope, Mark // New Scientist;12/9/2006, Vol. 192 Issue 2581, p38 

    The article focuses on issues related to the occurrence of dead zones in oceans. Oxygen levels in the water can fall to dangerously low levels under certain conditions, creating what is commonly known as a dead zone. Fast-swimming creatures like fish can flee, but most bottom dwellers, such as...

  • Bed Level Changes and Megaripple Migration on a Barred Beach. Aagaard, Troels; Greenwood, Brian; Nielsen, Jørgen // Journal of Coastal Research;2000 Special Issue, p110 

    A field experiment was conducted on the north coast of Zealand, Denmark. This site is essentially non-tidal and the incident waves are fetch-limited. One of the aims was to record bed level changes across a nearshore bar during storm events using electromagnetic bed level sensors. Two of these...

  • Seeing into the deep. Freeman, Michael // MediaWeek;03/02/98, Vol. 8 Issue 9, p37 

    Introduces the `crittercam,' a flashlight-size television camera and recorder, which is perfected for deep sea dives, providing animal's-eye-views. Crittercam's inventor; Concept behind the invention.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics