Determination of the distribution of shallow-water seagrass and drift algae communities with acoustic seafloor discrimination
Rev. biol. trop
; 53(supl.1): 165-174, maio 2005. tab, graf, ilus, mapas
Artigo
em Inglês
| LILACS
| ID: lil-456507
Biblioteca responsável:
BR1.1
ABSTRACT
The spatial distribution of seagrass and algae communities can be difficult to determine in large, shallow lagoon systems where high turbidity prevents the use of optical methods like aerial photography or satellite imagery. Further complications can arise when algae are not permanently attached to the substratum and drift with tides and currents. A study using acoustic seafloor discrimination was conducted in the Indian River Lagoon (Florida, USA) to determine the extent of drift algae and seagrass. Acoustic surveys using the QTC View V system based on 50 and 200 kHz transducers were conducted near Sebastian Inlet. Results indicate that areas of seagrass can be identified, and are mixed with a high abundance of drift algae. Nearest-neighbor extrapolation was used to fill in spaces between survey lines and thus obtain spatially cohesive maps. These maps were then ground-truthed using data from towed video and compared using confusion matrices, The maps showed a high level of agreement (60%) with the actual distribution of algae, however some confusion existed between bare sand and algae as well as seagrass
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Coleções:
Bases de dados internacionais
Contexto em Saúde:
ODS3 - Saúde e Bem-Estar
Problema de saúde:
Meta 3.9: Reduzir o número de mortes por produtos químicos perigosos e contaminação do ar e água do solo
Base de dados:
LILACS
Assunto principal:
Água do Mar
/
Acústica
/
Monitoramento Ambiental
/
Ecossistema
/
Eucariotos
Tipo de estudo:
Estudo de avaliação
/
Estudo prognóstico
País/Região como assunto:
América do Norte
Idioma:
Inglês
Revista:
Rev. biol. trop
Assunto da revista:
Biologia
/
Medicina Tropical
Ano de publicação:
2005
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Estados Unidos
Instituição/País de afiliação:
Nova Southeastern University/US
/
St Johns River Water Management District/US