Open Access Open Access  Restricted Access Subscription or Fee Access

Review of Construction's Impacts on Marine Areas

Manoj Kumar


In order to manage flooding, generate electricity, facilitate shipping, support agriculture, and advance industry, dams have greatly benefited human society. The development of dams, however, seems to have a significant impact on neighbouring coastal areas and the natural ecosystems downstream. This review utilises contemporary studies to thoroughly examine how dam construction has impacted river hydrology, geomorphology, and ecology of lower stream reaches globally in order to synthesise these impacts. The consequences of dams on ecosystems include decreased river flow, decreased sediment flux, changing water temperature, altered estuarine delta, altered nutrient composition and distribution, altered phytoplankton population structure and distribution, fragmented habitat, and restricted migration pathways in river segments and nearby oceans. In addition, prohibiting fishing activities, deconstructing pointless dams, and researching innovative reservoir management techniques (such as focused management of reservoir stock and sediment flushing operations) are recommended. Many companies throughout the world engage in marine dredging, which is an extraction process. Although consequences are mainly unknown, there is concern about how dredging may affect marine species, particularly marine sea mammals.  This review seeks to add to the body of knowledge both direct and indirect, adverse and beneficial effects on marine animals. It does so by evaluating the literature that is already accessible. Given the dredgers' modest speed in terms of direct consequences, collisions are possible but rare. Marine mammals' hearing systems are unlikely to be damaged by the noise, which is broadband and has the majority of its energy below 1 kHz, although masking and behavioural alterations are still conceivable

Full Text:



Zhang X, Fang C, Wang Y, Lou X, Su Y, Huang D. Review of Effects of Dam Construction on the Ecosystems of River Estuary and Nearby Marine Areas. Sustainability. 2022 Jan;14(10):5974.

Wang Y, Rhoads BL, Wang D. Assessment of the flow regime alterations in the middle reach of the Yangtze River associated with dam construction: potential ecological implications. Hydrological Processes. 2016 Oct 15;30(21):3949-66.

Zhai H, Cui B, Hu B, Zhang K. Prediction of river ecological integrity after cascade hydropower dam construction on the mainstream of rivers in Longitudinal Range-Gorge Region (LRGR), China. Ecological Engineering. 2010 Apr 1;36(4):361-72.

Laist DW, Knowlton AR, Mead JG, Collet AS, Podesta M. Collisions between ships and whales. Marine Mammal Science. 2001 Jan;17(1):35-75.

Crespo EA, Hall MA. Interactions between aquatic mammals and humans in the context of ecosystem management. InMarine Mammals 2002 (pp. 463-490). Springer, Boston, MA.

Dadswell MJ, Rulifson RA. Macrotidal estuaries: a region of collision between migratory marine animals and tidal power development. Biological Journal of the Linnean Society. 1994 Jan 1;51(1-2):93-113.

Crespo EA, Hall MA. Interactions between aquatic mammals and humans in the context of ecosystem management. InMarine Mammals 2002 (pp. 463-490). Springer, Boston, MA.

Pavanato HJ, Melo-Santos G, Lima DS, Portocarrero-Aya M, Paschoalini M, Mosquera F, Trujillo F, Meneses R, Marmontel M, Maretti C. Risks of dam construction for South American river dolphins: a case study of the Tapajós River. Endangered species research. 2016 Sep 21;31:47-60.

Bossi R, Riget FF, Dietz R, Sonne C, Fauser P, Dam M, Vorkamp K. Preliminary screening of perfluorooctane sulfonate (PFOS) and other fluorochemicals in fish, birds and marine mammals from Greenland and the Faroe Islands. Environmental Pollution. 2005 Jul 1;136(2):323-9.

Gordon J, Gillespie D, Potter J, Frantzis A, Simmonds MP, Swift R, Thompson D. A review of the effects of seismic surveys on marine mammals. Marine Technology Society Journal. 2003 Dec 1;37(4):16-34.



  • There are currently no refbacks.