Environmental conditions in coastal estuaries vary hourly and seasonally. (a) discuss two important causes for the variation in the temperature and/or salinity of an estuary. be sure to include the connection between each cause and temperature and/or salinity. (b) discuss two roles that coastal wetlands play that are ecologically important, and two roles that wetlands play that are economically important. (c) identify and explain three ways in which humans have had a negative impact on or have degraded coastal wetlands. (d) choose one of the negative human impacts you identified in part (c), and explain one environmental policy and one economic incentive that could have prevented it.

When species lose their habitats they may..

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

What type of plant is good for a bioassay and where can i buy it? i only have a month.