Here are some useful links and pdf attachments for your persual

http://www.ciba.res.in/nicra/index.php/background-information

http://scialert.net/fulltext/?doi=ijar.2015.44.53

1) The first feed of finfish & shell fish larvae being always a phytoplankton, climate changes could alter spore flowering or end up without blooming at all. Such a situation could be disastrous. Similarly the out come of the second feed which depends upon the first, could be in jeopardy. This could lead to lesser amounts of choice feeds for pelagics. The advantage is: higher temperatures shortens larval stages, leading to lesser mortalities & more survivality. We could come across shorter life cycles, leading to greater probability for speciation.

2) Some of the delicate ones from tropical systems would migrate to temperate waters.

3) Species like Mullets whose choice feeds are the embedded diatomes, would have to switch over to newer forms, threatening their population.

4) Due to more amount of heat, it will lead to greater amount of evaporation, resulting in greater precipitation, even at odd seasons, thereby unbalancing life systems. Advantage is: land based nutrients would flow in greater amounts in the neritic zones, leading to higher productivities in coastal areas. Saprotrophs would have a good time, leading to shorter time periods in nutrient recycling.

5) As more amount of precipitation occurs, more areas of coastal zones would be covered with clay & mud, smothering the rocky areas - thereby minimising suitable substratum for seaweeds, this is especially true where there is no wave action.

6) It is quite possible that negative estuaries could become positive ones, leading to greater productivity in the new regimes.