Aisyatur Robia

Indicator Species Indicator species, organism—often a microorganism or a plant—that serves as a measure of the environmental conditions that exist in a given locale. Indicator species are chosen for their sensitivity to environmental conditions. Example of indicator species such as: ·          Plants, algae, mosses, and fungi -       The presence of certain species of plants suggests how well other species might grow in the same place. -           Mosses often indicate acid soil. -           Greasewood indicates saline soil -           In Vancouver, Canada, the environmental health of estuaries is monitored by the indicator species of eel grass. -       Lichens, which are a combination of an alga and a fungus growing together, are indicators of air pollution, especially sulfur dioxide, a waste product of burning sulfur-containing fossil fuels. In Great Britain, bushy lichens grow only in clean air. Leafy lichens tolerate some air pollution and crusty liche

Distribution of the invasive freshwater shrimp Palaemon sinensis (Sollaud, 1911) in rivers of Hiroshima Prefecture, western Japan Hidetoshi Saito, Aiko Yamasaki, Junpei Watanabe and Koichiro Kawai, Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima 739-8528, Japan Faculty of Applied Biological Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima 739-8528, Japan                                       Gambar 1. Palaemon sinensis The freshwater palaemonid shrimp, Palaemon sinensis was imported into Japan from China as live fishing bait, In that study, field research was conducted to confirm the distribution of this invasive shrimp in eight rivers in Hiroshima Prefecture, western Japan. A longitudinal distribution analysis showed that P. sinensis occurred in the lower reaches, whereas P. paucidens showed a wider distribution from the upper to the lower reaches. Palaemon sinensis occurred in a narrow range of stream