Keith (Marine Biological Association, Plymouth, UK) Hiscock 
Marine Biodiversity Conservation [PDF ebook] 
A Practical Approach

Effective marine biodiversity conservation is dependent upon a clear scientific rationale for practical interventions. This book is intended to provide knowledge and tools for marine conservation practitioners and to identify issues and mechanisms for upper-level undergraduate and Masters students. It also provides sound guidance for marine biology field course work and professionals. 

The main focus is on benthic species living on or in the seabed and immediately above, rather than on commercial fisheries or highly mobile vertebrates. Such species, including algae and invertebrates,  are fundamental to a stable and sustainable marine ecosystem. The book is a practical guide based on a clear exposition of the principles of marine ecology and species biology to demonstrate how marine conservation issues and mechanisms have been tackled worldwide and especially the criteria, structures and decision trees that practitioners and managers will find useful. Well illustrated with conceptual diagrams and flow charts, the book includes case study examples from both temperate and tropical marine environments.