Community Structure of Age-0 Fishes in Paired Mainstem and Created Shallow-water Habitats in the Lower Missouri River

2015 ◽  
Vol 32 (4) ◽  
pp. 753-762 ◽  
Author(s):  
T. A. Starks ◽  
J. M. Long ◽  
A. R. Dzialowski
1995 ◽  
Vol 73 (8) ◽  
pp. 1438-1443 ◽  
Author(s):  
Patricia A. Wisenden ◽  
Robert C. Bailey

We used artificial substrates (rocks < 1500 cm2 surface area) in shallow water (2 m) to assess the development of epilithic macroinvertebrate communities in the presence of zebra mussels. At a turbulent site (Wheatley, Lake Erie), previously colonized (with a non-zebra mussel community) and uncolonized rocks left for 1 year both had lower densities of total invertebrates than previously colonized rocks recovered after only 1 day. As zebra mussels colonized the rocks, Gammarus sp. (amphipods) increased in density, while Chironomini and Tanypodinae (midges), Polycentropus sp. (caddisflies), and Physella sp. and Pleurocera sp. (snails) declined. At a protected site (Stoney Point, Lake St. Clair), previously colonized rocks initially (2 months) had higher densities of many taxa, including zebra mussels, than uncolonized rocks. This difference disappeared after 1 year, as zebra mussels increased on all rocks. Gammarus sp. maintained its numbers, while Tricladida (flatworms) increased and Oecetis sp. (caddisflies), Physella sp., Pleurocera sp., and Tanypodinae declined. Although a similar "zebra mussel – amphipod" community developed on rocks at both sites, we hypothesize that at the turbulent site, zebra mussels and amphipods have a shared tolerance of unstable habitats, and zebra mussels facilitate amphipod colonization of rocks by increasing microhabitat stability and food supply. At the protected site, zebra mussels outcompete other surface dwellers like snails for space, and facilitate the colonization of scavenger–omnivores like amphipods and flatworms.


Ecology ◽  
1981 ◽  
Vol 62 (4) ◽  
pp. 1052-1066 ◽  
Author(s):  
Sarah Ann Woodin

2019 ◽  
Vol 99 (06) ◽  
pp. 1325-1342 ◽  
Author(s):  
Karin Richter ◽  
Kai Horst George

AbstractDuring the expedition POS397 ‘GroMet’ in 2010 the sediments of the Great Meteor Seamount (GMS) plateau were sampled quantitatively for the first time, allowing statistical analysis of the community structure of Harpacticoida and Canuelloida. Analysis of similarity revealed no differences between three geographic regions at family/species level. Analysis of diversity indicated slightly greater diversity in the south, with more species belonging to more genera/families. Dispersal opportunities possibly occurring at the plateau (emergence, erosion, rafting) are discussed. Of 18 investigated families 106 species were identified, but only 5.66% were already scientifically known and widely distributed. Within the investigated families, 37.74% of the species belonged to shallow-water genera, leading to the conclusion that the plateau was once connected to shallow-water habitats, perhaps functioning as a stepping stone, but is now geographically isolated. This isolation is most likely due to seafloor spreading of the Atlantic Ocean and descending of the GMS. On the plateau, six species with wider distribution ranges were present, indicating that species may arrive accidentally, but their means of settlement remains unknown. Comparisons of the identified GMS plateau fauna with that of other seamounts and mid-oceanic islands revealed similar communities at family level, but at species level the GMS shares only one species with the Seine Seamount; all other elevations had more species in common. Hence, the GMS plateau is considered to be isolated regarding benthic Copepoda but may play an important role in meiofaunal species distribution, as it represents a shallow-water habitat within the deep sea.


2012 ◽  
Vol 47 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Andrew R. Dzialowski ◽  
Joseph L. Bonneau ◽  
Todd R. Gemeinhardt

2011 ◽  
Vol 27 (2) ◽  
pp. 157-167 ◽  
Author(s):  
A. N. Thanos Papanicolaou ◽  
Md. Elhakeem ◽  
D. Dermisis ◽  
N. Young

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