Microberotha macculloughi gen. nov. and sp. nov. from Early Eocene Okanagan Highlands amber of Hat Creek, British Columbia, Canada, is described. This new genus and species represents one of the smallest members of the family Berothidae and the first occurrence of the family in the New World Tertiary. The systematic position of the genus Microberotha within the family is rather unclear, but the...

In this study, a set of nitrogen reduction strategies were modeled to evaluate the feasibility of improving water quality to meet total maximum daily loads (TMDLs) in two agricultural watersheds. For this purpose, a spatial-process model was calibrated and used to predict monthly nitrate losses (1994-96) from Sand and Bevens Creek watersheds located in south-central Minnesota. Statistical compa...

In 1993 trees and shrubs were planted along a study area of Leatherstocking Creek (otsego C01mty, N. Y.) previously devoid of riparian vegetation. A baseline study was initiated to deteo~ne the effects of il~roved riparian vegetation ou waler quality, invertebrate and fish composition and biomass. INTRODUCTION Significant mortality of brook trout occurred in the upper reaches of Leather-stockin...

In Chesapeake Bay, Maryland, USA, some of the most contaminated sediments are found in the highly industrialized Baltimore Harbor–Patapsco River area. As part of a comprehensive assessment of sediment quality in this system, sediment toxicity was assessed in 10-d acute tests with the estuarine amphipod Leptocheirus plumulosus. Mean amphipod survival was significantly reduced in 7 of the 25 samp...

spatial measurements of conductivity, temperature and depth were used to study salinity variations along the principal channels of the tidal hypersaline creek network in the vicinity of bushehr port, persian gulf during three 25- tidal cycles in both warm and cold months. salinity variations and tidal fluctuations were out of phase throughout the short inverse estuary. the salinity values insid...

As non-native species move across the landscape and hydrofracking and other human impacts increase in scope, it is becoming more critical than ever that we can quantify changes to community structure. In order to do that, however, we must first have baseline data on which species are initially present. These baseline data also have the benefit of facilitating speciesspecific research by identif...