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1. Effects of Spatial and Temporal Variation of Acid-Volatile Sulfide on the Bioavailability of Copper and Zinc in Freshwater Sediments [usgs_brd_cerc_d_sulfides]
Variation in concentrations of acid-volatile sulfide (AVS) in sediments from the upper Clark Fork River of Montana was associated with differences in bioaccumulation of Cu and Zn and growth of larvae ...


2. Tolerance of Freshwater Test Organisms to Formulated Sediments [usgs_brd_cerc_d_freshwater]
A method is described for preparing formulated sediments for use in toxicity testing. Ingredients used to prepare formulated sediments included commercially available silt, clay, sand, humic acid, ...


3. A Catalogue of the Insects of South Africa [sa_catalog_southafricaninsects]
The aims of this web site are to catalogue the insect biodiversity of South(ern) Africa, particularly in terms of agreements like the Convention on Biodiversity; to provide a channel of communication ...


4. Arthropods of La Selva (ALAS) Database [EC_ALAS]
The Arthropods of La Selva Database (ALAS) contains approximately 127,000 Specimen records for approximately 8000 species of arthropods, illustrated by more than 1300 images. The collection data ...


5. Species 2000 [Species2000]
Species 2000 has the objective of enumerating all known species of plants, animals, fungi and microbes on Earth as the baseline dataset for studies of global biodiversity. It will also provide a simple ...


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