关键词: 丹顶鹤, 生境破碎化, 巢位选择

Abstract: Rudong tidal flat is an important production area of clam (Meretrix meretrix). In order to understand the pollution status of petroleum hydrocarbon in the calm habitat of the tidal flat, an investigation was conducted on the total petroleum hydrocarbon (TPHs) concentration in the clam body and its growth environment in March, May, August, and November 2010. In the surface sea water, there were several observation sites appeared slight oil pollution in each season, and the pollution degree was slightly higher in summer and autumn than in winter and spring. Though the sediment TPHs concentration in four seasons conformed to the first degree of the national standard “Marine Sediment Quality”, it had an obvious seasonal variation, being the highest in summer, possibly due to the changes of sediment mechanical components caused by tide flush. The mean concentration of TPHs in the clam body was the highest in spring, followed by in summer,winter, and autumn. It was suggested that the TPHs concentration in the clam body was susceptible to the oil content in the sediment and water body.

Key words: Red-crowned crane, Habitat fragmentation, Nest site selection