Disturbance, sediment stability, and trophic structure of soft-bottom communities

1984 ◽  
Vol 42 (4) ◽  
pp. 893-921 ◽  
Author(s):  
P. K. Probert
Keyword(s):  
Trophic Structure ◽  
Sediment Stability ◽  
Soft Bottom ◽  
Bottom Communities

Caging Manipulations in Marine Soft-Bottom Communities: Importance of Animal Interactions or Sedimentary Habitat Modifications

1980 ◽  
Vol 37 (7) ◽  
pp. 1130-1139 ◽  
Author(s):  
Larry W. Hulberg ◽  
John S. Oliver
Keyword(s):  
Exposure Period ◽  
Sediment Deposition ◽  
Soft Bottom ◽  
Sand Flat ◽  
Elkhorn Slough ◽  
Bottom Communities ◽  
Mobile Species ◽  
Large Numbers ◽  
Competitive Release ◽  
Sand Bottom

Caging manipulations were performed in two marine soft-bottom communities to test two nonexclusive hypotheses: (1) polychaete abundance changes in cages are caused by the presence or absence of particular predators and competitors; (2) polychaete changes in cages are caused by animals responding to cage-induced habitat modifications, especially sediment deposition and erosion.The significant changes in the polychaete community beneath a variety of cages installed on a highly wave-exposed sand bottom could not be explained by the presence or absence of predatory demersal fishes. This result was obtained despite the exclusion of fish which normally consume large numbers of infaunal polychaetes.A caging experiment similar to Woodin's (1974) was performed in the channel of Elkhorn Slough using comparable cages and similar exposure period. In Woodin's experiments, the exclusion of a sedentary tube builder was accompanied by an increase in a mobile deposit feeder. This was interpreted as a competitive release. In our experiment, no sedentary species inhabited the channel and none were excluded; nevertheless, this same mobile species increased inside the cages. Although the importance of potential predators and competitors was not documented in the caging experiments, all of the sand-flat and slough caging results are consistent with the hypothesis that animals respond to sedimentary habitat modifications created by cages. This hypothesis is not considered in most caging experiments in marine soft-bottom communities.

Succession and seasonal variation in the development of subtidal macrobenthic soft-bottom communities off northern Chile

2010 ◽  
Vol 64 (3) ◽  
pp. 180-189 ◽  
Author(s):  
Aldo S. Pacheco ◽  
Jürgen Laudien ◽  
Martin Thiel ◽  
Marcelo Oliva ◽  
Wolf Arntz
Keyword(s):  
Seasonal Variation ◽  
Northern Chile ◽  
Soft Bottom ◽  
Bottom Communities

Testing MEDOCC and BOPA indices in shallow soft-bottom communities in the Spanish Mediterranean coastal waters

2012 ◽  
Vol 19 ◽  
pp. 98-105 ◽  
Author(s):  
S. Pinedo ◽  
E. Jordana ◽  
F. Salas ◽  
M.D. Subida ◽  
E. García Adiego ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Soft Bottom ◽  
Bottom Communities
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