Effects of some natural and artificial substrata on sessile marine organisms at Galeta Reef, Panama.

Keith Mcguinness

Research output: Contribution to journalArticleResearchpeer-review

Abstract

ite the potential importance of substratum type to the sessile assemblage developing, few field experiments have examined the effects of this factor in marine habitats. Three types of hardsubstrate are common in the shallow waters near Galeta Point on the Caribbean coast of Panama: coral, on intertidal reef-flats, rock, more common in lagoonal areas, and wood, most abundant in the nearby mangrove forest. There were significant differences in the number of alga species, and the abundances of some of these species, colonizing plates of these 3 natural substrata and of 2 artificial substrata(perspex and concrete) in 4 habitats (front and back reef-flat, lagoon and mangrove forest). Effects of substrata varied among habitats. In the lagoon, for example, plates of rock, concrete and perspex were colonized by more species than were plates of coral or wood. Further, at some times on the reef-flat.algae occupied less space on perspex plates than on plates of the other 4 types of substrata. In contrast, the coralline crust LUlothamn~on sp. was most abundant on perspex and concrete in the lagoon. Results demonstrate that type of substratum plays an important role in determining the abundance of sessile species in some marine habitats. Reasons for these effects are not clear but may include differential grazing by invertebrates or differential retention of spores, water or heat. Using artificial substrata to follow the development of sessile assemblages may give misleading results, particularly if comparisons are made among habitats. 
Original languageEnglish
Pages (from-to)201-208
Number of pages8
JournalMarine Ecology - Progress Series
Volume52
Publication statusPublished - 2 Mar 1989
Externally publishedYes

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Panama
reefs
reef
algae
organisms
habitat
habitats
lagoon
mangrove forests
mangrove
corals
coral
rocks
alga
sessile species
rock
spore
shallow water
spores
grazing

Cite this

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title = "Effects of some natural and artificial substrata on sessile marine organisms at Galeta Reef, Panama.",
abstract = "ite the potential importance of substratum type to the sessile assemblage developing, few field experiments have examined the effects of this factor in marine habitats. Three types of hardsubstrate are common in the shallow waters near Galeta Point on the Caribbean coast of Panama: coral, on intertidal reef-flats, rock, more common in lagoonal areas, and wood, most abundant in the nearby mangrove forest. There were significant differences in the number of alga species, and the abundances of some of these species, colonizing plates of these 3 natural substrata and of 2 artificial substrata(perspex and concrete) in 4 habitats (front and back reef-flat, lagoon and mangrove forest). Effects of substrata varied among habitats. In the lagoon, for example, plates of rock, concrete and perspex were colonized by more species than were plates of coral or wood. Further, at some times on the reef-flat.algae occupied less space on perspex plates than on plates of the other 4 types of substrata. In contrast, the coralline crust LUlothamn~on sp. was most abundant on perspex and concrete in the lagoon. Results demonstrate that type of substratum plays an important role in determining the abundance of sessile species in some marine habitats. Reasons for these effects are not clear but may include differential grazing by invertebrates or differential retention of spores, water or heat. Using artificial substrata to follow the development of sessile assemblages may give misleading results, particularly if comparisons are made among habitats. ",
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Effects of some natural and artificial substrata on sessile marine organisms at Galeta Reef, Panama. / Mcguinness, Keith.

In: Marine Ecology - Progress Series, Vol. 52, 02.03.1989, p. 201-208.

Research output: Contribution to journalArticleResearchpeer-review

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N2 - ite the potential importance of substratum type to the sessile assemblage developing, few field experiments have examined the effects of this factor in marine habitats. Three types of hardsubstrate are common in the shallow waters near Galeta Point on the Caribbean coast of Panama: coral, on intertidal reef-flats, rock, more common in lagoonal areas, and wood, most abundant in the nearby mangrove forest. There were significant differences in the number of alga species, and the abundances of some of these species, colonizing plates of these 3 natural substrata and of 2 artificial substrata(perspex and concrete) in 4 habitats (front and back reef-flat, lagoon and mangrove forest). Effects of substrata varied among habitats. In the lagoon, for example, plates of rock, concrete and perspex were colonized by more species than were plates of coral or wood. Further, at some times on the reef-flat.algae occupied less space on perspex plates than on plates of the other 4 types of substrata. In contrast, the coralline crust LUlothamn~on sp. was most abundant on perspex and concrete in the lagoon. Results demonstrate that type of substratum plays an important role in determining the abundance of sessile species in some marine habitats. Reasons for these effects are not clear but may include differential grazing by invertebrates or differential retention of spores, water or heat. Using artificial substrata to follow the development of sessile assemblages may give misleading results, particularly if comparisons are made among habitats. 

AB - ite the potential importance of substratum type to the sessile assemblage developing, few field experiments have examined the effects of this factor in marine habitats. Three types of hardsubstrate are common in the shallow waters near Galeta Point on the Caribbean coast of Panama: coral, on intertidal reef-flats, rock, more common in lagoonal areas, and wood, most abundant in the nearby mangrove forest. There were significant differences in the number of alga species, and the abundances of some of these species, colonizing plates of these 3 natural substrata and of 2 artificial substrata(perspex and concrete) in 4 habitats (front and back reef-flat, lagoon and mangrove forest). Effects of substrata varied among habitats. In the lagoon, for example, plates of rock, concrete and perspex were colonized by more species than were plates of coral or wood. Further, at some times on the reef-flat.algae occupied less space on perspex plates than on plates of the other 4 types of substrata. In contrast, the coralline crust LUlothamn~on sp. was most abundant on perspex and concrete in the lagoon. Results demonstrate that type of substratum plays an important role in determining the abundance of sessile species in some marine habitats. Reasons for these effects are not clear but may include differential grazing by invertebrates or differential retention of spores, water or heat. Using artificial substrata to follow the development of sessile assemblages may give misleading results, particularly if comparisons are made among habitats. 

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