Why are estuaries vulnerable to the effects of pollution? Estuaries are very productive because they constantly receive nutrients from rivers and for the ocean. Estuaries are vulnerable to pollution because ocean, lake, and river pollutants enter and because dense human settlements surround most estuaries.

Common threats to estuaries

• increased nutrients and algal blooms.
• loss of habitat and biodiversity.
• contaminants and pollutants.
• accelerated rates of sedimentation.
• disturbance of acid sulfate soils.
• changes to freshwater and tidal flows.
• invasive species.
• climate change.

In an estuary, human interference can cause drastic changes and lead to population die offs, such as fish kills. Students investigate what could cause water quality to decrease enough to kill fish.

One reason that estuaries are such productive ecosystems is that the water filtering through them brings in nutrients from the surrounding watershed. A watershed, or drainage basin, is the entire land area that drains into a particular body of water, like a lake, river or estuary.

While hero-and-sidekick relationships in comics have been interpreted as having a homoerotic subtext, in Marvel canon, the relationship between Rogers and Barnes is strictly platonic, and is not depicted as sexual or romantic.

As Bucky Barnes was constantly frozen and unfrozen to perform assassinations throughout the generations, the words needed to trigger his brainwashing and control him were transcribed into the Winter Soldier Book and passed down.

During Captain America: the Winter Soldier, it is revealed to Steve that Bucky didn’t die in WW2, but that he actually survived and was brainwashed by HYDRA to become their super assassin.

On December 16, 1991, the car crash said to be the cause of the deaths of Howard and Maria Stark was caused by the Winter Soldier while under Hydra’s control, causing the Starks’ car to crash and then killing the Starks after they survived the initial impact.

Steven Grant Rogers

Margaret Elizabeth Carter is a fictional character appearing in American comic books published by Marvel Comics. She is usually depicted as a supporting character in books featuring Captain America….

Josh Brolin

James Rhodes

Harry Osborn: Peter’s best friend, the son of Norman Osborn, the father of Normie Osborn and Stanley Osborn, and the second incarnation of Green Goblin.