Threats to salt marshes

Question 1

Examples

Answer 1

Key Haven, Hampshire

South Coast, formed behind Hurst Castle Spit which formed due to longshore drift from west

Question 2

Human threats

Answer 2

Industrial pollution may harm many marsh species, one has suggested oil pollution has led to a decline in spartina

Agriculture pollution has led to eutrophication and disruption of marine and marsh ecosystems

Preaging removes sediment, this reduces mudflat accumulation

Much pressure for developments in these coastal areas

Question 3

Natural threats

Answer 3

Sea levels may rise too quickly for marshes to adjust, increased incidence of storms leads to more flooding

Storms create greater wave energy and more potential erosion

Changing temps and rainfall patterns affects the tolerance of marsh species