Manmade environments change the natural environment. Sometimes they threaten the ecosystem life directly and at other times might cause changes indirectly. For example, Man-made creations alter shorelines. Some of the altered shorelines are modifications made for the purpose of original structures such as seawalls and docks etc. Studies done on Florida coastal waters are already wary about rising toxic levels (McDonald et al., 1996). Sediment samples drawn from the shorelines of Florida highlight an inherent problem. Sediment quality indicates high levels of eco-toxins
The nature shoreline is polluted because of the alternations made for these constructions. Sometimes coves and small pocket beaches might change when these constructions are done. Usually metal, wood and cement are used as fillers in such cases. Research is divided when it comes to altered shorelines. Some manmade constructions are quintessential for life and shorelines have to be modified accordingly. Even in the modification of shorelines, governments usually take care to check the form of marine life, diversity and ecosystem effects that could be in the shoreline. Only when it is decided that the altered shoreline might have less diversity or significance in terms of natural habitats for sea creatures and the like, then attempts would be made for creating the natural environment.
There is some direct impact because of manmade structures near the shorelines. For instance, the structures would result in problems of natural segmentation occurrence within the area. Leeching of the sand occurs here. Erosion effects could be more than the natural erosion and at this point becomes a problem. Where natural erosion is replaced by sudden man made erosion effects, and then shoreline seawalls change. Increased erosion will degrade the vegetation and supportive dunes. The shore becomes more vulnerable to savage without these. Manmade structures such as houses or harbours could both result in lessening compaction of the slopes and the weakened slopes gradually suffer slope failure if they are not buttressed with other support. Slumping of the slope occurs.
Environmental aspects as connected to economy and society
Tourism is observed to be one of the fastest growing industries and yet it is tourism that has a very severe impact on the environment. From shorelines beaches to natural environments on the land, it could be said that tourism has the most significant impact on the environment. Now, although the rapid expansion part of tourism cannot be altered, countries around the world are selective of how they construct the tourism experience (Neto, 2003). Sustainable tourism in this context assists in the protection of the environment, and reduces adverse impact to the environment. Similar efforts taken in the context of tourism because of beach areas and coastal shorelines could minimize impact. While these are direct effects, there are indirect effects. Firstly, tourism directly connects to economic development of the place. As a result, more jobs are created in the place. When more jobs are created, then the place gets a significant economic boost with the real estate values going up. More people migrate to the place and settle down there leading to urban expansions in the coastal areas, which burden the coastal areas (Burak et al., 2004).