VARMDO, Sweden (Reuters) — Swedish wetlands near the capital Stockholm are being kept saturated for longer to increase the numbers of pike coming to spawn in warm, sheltered waters in the spring. The pike “factory” not only helps restore biodiversity in the wetland, it also helps reduce algal bloom in the Baltic Sea as increased numbers of the predator allow smaller organisms to eat the algal bloom. The conservation effort began in 2013, with shrubs […]