Flashcards
Halosere- salt marsh succession
Flashcards do conjunto (10)
- 1—SHELTER- start to form in sheltered areas e.g. behind a spit, sheltered river estuary
- 2—DEPOSITION- fine material starts to be deposited forming mudflats (aided by eelgrass growth slowing currents leading to further deposition of fine material)
- 3—PINOEERS- start to colonise in harsh environment of salt and periodic submergence by sea (known as halophytes- e.g. spartina and glasswort)
- 4—SPARTINA- 2 root systems- fine mat of surface roots bind mud, long, thick deep roots can secure up to 2m of deposited material (trap mud)
- 5—CLOSE VEGETATION OVER MUD- colonisation of marsh grass and sea lavender (form dense mat up to 15cm high)
- 6—SLOW TIDAL CURRENTS- furthered by vegetation growth
- 7—DEAD ORGANIC MATTER- also helps to build surface, growing 1-25mm a year
- 8—COMPLEX CREEK SYSTEM- mud levels rise and creeks develop, they channel tides which deepen as marsh grows
- 9—HOLLOWS- may form where sea water is trapped then evaporates leaving salt-pans with high salinity (preventing vegetation growth)
- 10—LAND RISES ABOVE SEA LEVEL- rushes and reeds established, eventually leading to tree growth e.g. ash then oak, rarely covered by sea
Informações
- Descrição
- A Levels Geography (A level- Coasts) FlashCards sobre Halosere- salt marsh succession, criado por beth2384 em 28-04-2014.
- Criado por
- beth2384
- Visualizações
- 565
- Avaliação