Page 293 - Freshwater-Biology-and-Ecology-Handbook
P. 293

There have been surprisingly few

                      analyses of the long-term trends in the

                      ecological quality of English rivers.














































































                                                                 Freshwater Biology and Ecology Handbook  |  293
                                                                                                                 –
   288   289   290   291   292   293   294   295   296   297   298