scholarly journals The importance of grazing food chain for energy flow and production in three intertidal sand bottom communities of the northern Wadden Sea

1985 ◽  
Vol 39 (3) ◽  
pp. 273-301 ◽  
Author(s):  
Harald Asmus ◽  
Ragnhild Asmus
Keyword(s):  
Food Chain ◽  
Energy Flow ◽  
Wadden Sea ◽  
Intertidal Sand ◽  
Bottom Communities ◽  
Sand Bottom ◽  
Grazing Food Chain

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.

Stable isotopic evidence for the differential contribution of diazotrophs to the epipelagic grazing food chain in the mid-Pacific Ocean

2018 ◽  
Vol 27 (12) ◽  
pp. 1467-1480 ◽  
Author(s):  
Sachiko Horii ◽  
Kazutaka Takahashi ◽  
Takuhei Shiozaki ◽  
Fuminori Hashihama ◽  
Ken Furuya
Keyword(s):  
Pacific Ocean ◽  
Food Chain ◽  
Isotopic Evidence ◽  
Stable Isotopic ◽  
Differential Contribution ◽  
Grazing Food Chain

Methanogenesis in sediments of an intertidal sand flat in the Wadden Sea

2015 ◽  
Vol 164 ◽  
pp. 39-45 ◽  
Author(s):  
Christy S. Wu ◽  
Hans Røy ◽  
Dirk de Beer
Keyword(s):  
Wadden Sea ◽  
Sand Flat ◽  
Intertidal Sand ◽  
Intertidal Sand Flat

An algae — Desert snail food chain: Energy flow and soil turnover

Oecologia ◽  
1980 ◽  
Vol 46 (3) ◽  
pp. 402-411 ◽  
Author(s):  
Moshe Shachak ◽  
Yosef Steinberger
Keyword(s):  
Food Chain ◽  
Energy Flow
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