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Flashcards in Coasts Beaches and Estuaries Deck (22):
1

Fine sand is found on what degree of beaches?

1-3 degrees

2

Coarse sand is found on beaches of what degree?

4-9 degrees

3

What type of particle is found on beaches from 10-24 degrees?

Pebbles

4

What is the main mineral found on white sandy beaches?

Calcium Carbonate

5

What is the site called where the sea mixes with fresh water?

Estuary

6

What is a form of estuary produced by glaciers?

Fjord

7

Water on the Fjord floor is?

Deoxygenated and cold

8

The conditions on the fjord floor are similar to?

Parts of the deep sea

9

A coast is where

the land meets the ocean

10

Residence time is

the average length of time that a particle spends in a defined part of the ocean (often an estuary)

11

What type of estuary is formed when rising sea level floods the mouth of a river?

Coastal plain estuary (or a drowned river valley)

12

What type of estuary is formed when a bar or spit isolates a bay from the ocean?

Bar-built estuary

13

An indentation of coastline that forms a bay is called a ___________.

Coastal embayment

14

Mangrove forests are found:

In the intertidal zone within the tropics and subtropics.

15

Mangroves serve these purposes:

Coastal protection (from waves and storm surges), nursery for juvenile fishes, timber products, and carbon sequestration.

16

What is a pneumatophore?

Root of a mangrove tree; sticks up into the air and allows the tree to absorb gases directly from the atmosphere.

17

What is a stilt root?

Root of a mangrove tree; grows from the main trunk and burrows underground (sometimes through water) with a smaller network of roots. Provides stability for the mangrove and habitat for juvenile fishes.

18

Mangrove trees are adapted to high salinity. How?

By limiting water loss through stomata regulation and expelling salt through salt glands

19

In mangroves, what are aerenchyma?

Specialized cells in the roots that have air spaces for oxygen transport.

20

What are the different types of mangroves?

Buttonwood Mangrove (Conocarpus erectus)White Mangrove (Lagunculxaria racemes)Black Mangrove (Avicenna germinans)Red Mangrove (Rhizophora mangle)Grey Mangrove (Avecennia)

21

Buttonwood mangroves are used extensively for what? Why?

Landscaping, bonsai, and decorative purposes, due to the silvery hairs on their leaves.

22

Which country has the third-largest area of mangroves in the world?

Australia