Биология
                                          
                                               «Болото как экосистема»
                  
                          
                      
                                                   Болота – это особый мир, отдельный,
                                                                                                         
                                                                                                      живущий своей особой жизнью,
                                                                 
                                                               имеющий постоянных обитателей и временных гостей,
                                                                               
                                                                            свои голоса, свои шумы и, главное, свою тайну.
                                                                                                                   
                                                                                                                          Ги де Мопассан.