I actually like how you paid great attention to the wood and the water turtles.. however its sort've difficult to tell the deference between the water and the sand (the ripples are somewhat apparent in the water, but the colouration is slightly the same.. perhaps add some luster to the water?)

The turtles' are done rather well, perhaps add abit more definition in their shells and the part that separates them from the log they are on..they tend to blend within their surroundings alittle too well :3

the plants and colouration was done pretty good.. probably the only thing that bothered me are the few strands of grass on the far right. which seem to blurr slightly. other than that i think you did a well job.