https://padlet.com/19kentjh/hs9mi44gl7bk Made with an aura of mystery en-us 2018-05-02 17:49:41 UTC 2025-12-24 06:11:05 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Planets.png 19kentjh https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257379466 where the freshwater, rivers meet the salt water, sea
the mixing of the salt water and the freshwater occur due to tides and sometimes even strong winds

]]> 2018-05-02 17:53:41 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257379466 sophia56r https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257379959 -Salinity fluctuates dramatically from place to place and from time to time.
-Salinity also varies with depth, salty seawater is more dense and sinks to the bottom forming a salt wedge.
-Salt wedge moves back and forth with rhythm of tides.
- Seasonal variations in freshwater runoff from rivers as a result of rainfall or snowmelt.
-High-salinity estuaries are called negative estuaries.
-The average salinity for estuaries is about 35 ppt (parts per thousand) ]]> 2018-05-02 17:54:34 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257379959 19karkehabasd https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257380895 Estuaries can be subdivided into further habitats types such as: shallow subtidal, tidal sand, or mud flaps salt march, tidal creeks, and the upland transition zone. The shallow subtidal habitats are submerged but are rarely deeper. ]]> 2018-05-02 17:56:24 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257380895 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257380902 Coastal plain estuaries (drowned river valleys), bar-built estuaries, tectonic estuaries, and fjords.]]> 2018-05-02 17:56:25 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257380902 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257382273 Most common type of estuary- formed when ice from the last ice age melted and the rising sea water invaded freshwater.]]> 2018-05-02 17:59:00 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257382273 19kentjh https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257382333 the producers have a very high number due to the unique water system that brings producers from the ocean and the freshwater, that means that the amount of invertebrates and fish, also many shellfish and shrimps/crabs
but many animals have their adolescents in these estuaries ]]> 2018-05-02 17:59:07 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257382333 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257382983 Sediments accumulate and act as a wall between the ocean and fresh water.]]> 2018-05-02 18:00:28 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257382983 19karkehabasd https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257383451 tide pool animals and plants are well adapted to the zones. Some adaptations include the ochre sea star can tolerate a longer time period exposed to air than many other sea stars. Limiting factor is space and food but the main limiting factor is space. ]]> 2018-05-02 18:01:30 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257383451 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257383796 Land subsides because of the movement of the crust. ]]> 2018-05-02 18:02:12 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257383796 sophia56r https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257384014 -Rivers carry large amounts of sediment and other materials, including pollutants, into most estuaries.
-Fine muddy particles are carried down the estuary.
-The substrate of most estuaries is sand or soft mud.
-Mud is rich in organic material
- Respiration by decay bacteria uses up oxygen in the interstitial water(water between sediments)
-Sediments are often devoid of oxygen or are anoxic below first few centimeters.
-Estuaries with unimpeded tidal flow, most shallow ones have plenty of oxygen dissolved in water.
 - Some deep water estuaries (fjords) have a shallow sill that restricts water circulation .
-The sill prevents seawater from flowing along the bottom.
-The stagnant deep water may become depleted in oxygen because of bacterial respiration and decomposition of organic matter. ]]> 2018-05-02 18:02:38 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257384014 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257384098 Glaciers cut deep valleys along the coast. When sea levels rose, sea water would flow through them. Now rivers run through the valleys.]]> 2018-05-02 18:02:49 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257384098 19kentjh https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257385635

]]> 2018-05-02 18:05:40 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257385635 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257388758 Many estuaries are shallow and very wide (large surface area), causing them to have a high temperature, especially during low tide.]]> 2018-05-02 18:11:40 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257388758 19karkehabasd https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257389662 Fish, shellfish, and migratory birds are a few of the animals that can live in an estuary.
Manatees are also a key species due to them being one of the main consumers of producers for these areas
but the keystone species of the estuary is the oyster, a filter feeder due to them controlling the amount of toxins in the water
-Blue crabs
-Oyster reefs]]> 2018-05-02 18:13:27 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257389662 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257390209 Soft-bodied estuary animals (molluscs, worms)- maintain their osmotic (salinity equilibrium) balance by allowing their body fluids to change in reaction to changing salinity of the water.]]> 2018-05-02 18:14:28 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257390209 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257391675 (Fish, crabs, molluscs)- the salt concentration in their bodies remains mostly constant despite the salinity of the water.]]> 2018-05-02 18:17:25 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257391675 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257393509 When the salinity of the water is lower than the salinity of an organism's blood, they get rid of excess water and absorb surrounding solutes through active transport (the gills and kidneys help aid active transport).]]> 2018-05-02 18:20:39 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257393509 sophia56r https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257393649 -Large amounts of suspended sediments which greatly reduce water clarity.
-Very little light penetrates through the water column
-The material can clog feeding surfaces of some filter feeders and can even cause the death of some animals.

]]> 2018-05-02 18:21:01 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257393649 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257395418 -Euryhaline species can tolerate a wide range of salinities.
-Most species in estuaries are euryhaline species.]]> 2018-05-02 18:24:12 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257395418 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257395719 -Stenohaline species can tolerate only a narrow range of salinities
-They only reside in the upper or lower ends of the estuary.]]> 2018-05-02 18:24:50 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257395719 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257398754 2018-05-02 18:30:27 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257398754 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257399074 Estuaries act as important feeding and breeding grounds.
For example, Salmon are one of the most well known organisms that migrate. They migrate into the estuaries from the ocean
Another, Organism that migrates is a sea trout, they do a very similar migration to salmon]]> 2018-05-02 18:31:04 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257399074 sophia56r https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257401579 2018-05-02 18:36:20 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257401579 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257401630 The sharing of a resource by two or more species to avoid competition.]]> 2018-05-02 18:36:27 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257401630 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257402785 -Mangroves are flowering land plants adapted to live in the intertidal zone.
Mangals- dense forests formed by mangroves]]> 2018-05-02 18:39:09 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257402785 sophia56r https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257404280 2018-05-02 18:42:14 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257404280 sophia56r https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257405085 2018-05-02 18:43:50 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257405085 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257406733 Some mangroves develop pneumatophores, which are unbranched shallow roots that grow upward from low-oxygen mud to help aerate the plant tissue.]]> 2018-05-02 18:47:07 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257406733 kctubbs2 https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257409225 -One-third of all United States estuaries have disappeared
-70 percent of California estuaries have been eliminated
-Estuaries around the globe are being converted into harbors or ports
-Dammed rivers, garbage dumps, boat usage, and urban development all have a negative impact on estuaries
-Mangrove forests are eliminated for human benefit (roads, crops, dumps, urban development)]]> 2018-05-02 18:52:41 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257409225 sophia56r https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257411363 2018-05-02 18:58:03 UTC https://padlet.com/19kentjh/hs9mi44gl7bk/wish/257411363