WATER ECOSYSTEMS

After a long time, salmon are back in Alameda Creek. This is a big deal because it hasn't happened in 70 years. The creek is in a place called Sunol, and the salmon had to swim up a tall wall to get there. This shows that the environment is getting better. Salmon and steelhead trout are like nature

Microplastics, tiny plastic bits under five millimetres, are causing big trouble in our waterways. These little pieces are gathering in urban freshwater ponds, affecting creatures like Daphnia, which are vital for these ecosystems. Scientists looked at how microplastics affect Daphnia's health and t