Morphological similarities indicate that Palaeozoic problematic tubeworms, e.g. tentaculitids, cornulitids, microconchids, trypanoporids, Anticalyptraea, and Tymbochoos, form a monophyletic group. This group may also include hederelloids. Members of this group share affinities with lophophorates and their evolution could have partly been driven by predation. The extinction of Palaeozoic tubewor...

The food and feeding of Flemish Cap cod are described for 5 years based on 3921 stomachs collected in the fishing grounds off the Flemish Cap, Newfoundland in summer 1989–1993. Feeding intensity was high but the prey spectrum was narrow in all years with hyperiids and redfish (Sebastes sp.) predominating. Squid and polychaetes had a high inter-annual variability. Juvenile cod diet was dominated...

lhe diet of the Atlantic croaker from Mississippi Sound has been examined for the f i s t time. Over 83 taxa were encountered, or more than were reported from croaker in any other region. We also found 60 taxa, 36 of which overlapped with the above, in croaker from various offshore stations in the Gulf of Mexico. In Mississippi Sound the frequency of occurrcnce of items revealed primarily crust...

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Title of Document: EPIFAUNAL DISTURBANCE BY PERIODIC LOW DISSOLVED OXYGEN: NATIVE VERSUS INVASIVE SPECIES RESPONSE Elizabeth Bromley Jewett, Doctor of Philosophy, 2005 Directed By: Professor Kenneth Sebens, Department of Biology Dr. Anson Hines, Smithsonian Environmental Research Center Invasive species and low dissolved oxygen (DO) threaten the biodiversity and ecosystem health of estuaries wo...

This work constitutes an effort to evaluate benthic biodiversity in Bahía de Los Ángeles, Gulf of California, Mexico. To characterize macrofauna at the family level, 2 sampling campaigns took place during summer 2013 and winter 2014 6 coastal stations. A total 18,403 invertebrates were collected, 7,880 10,523 winter. These grouped into phyla 110 families, comprising 39 mollusks, 33 crustaceans,...

Examined digestive tracts of the red drum in Mississippi Sound contained mostly decapod crustaceans. Crustaceans accounted for 34 of 59 encountered taxa, more than reported from any other region. Nevertheless, the general diet for 104 fish with food contents out of the 107 examined is similar to that reported for red drum in several other studies from other areas. In addition to crustaceans, fi...

The removal of invasive plants is a global concern, and ecological restoration methods have been major research topic in recent years. In the estuarine salt marsh Yangtze River, dikes are typically used projects to eradicate plant Spartina alterniflora . We explored ways optimizing dike construction providing an effective basis for wetland control protection biodiversity analyzed effects on mac...