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Not all flowers bloom in spring. Those that do so largely because they need to set fruit or seed and have it mature before winter.

In the winter, the fruits would not be able to withstand the cold and freeze. Sometimes, the flower's petals will wither during and die in the winter, so they must bloom during the spring, the season of warmth and new life.

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14y ago
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14y ago

1. During the spring or the fall, there might be an algal bloom. Algal blooms occur when there is an excess of nutrients. During spring or fall, the cold water excesses nutrients from the water mixing.

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13y ago

because they have a calender inside them and they have a circle around the date of spring :).

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Q: Which season do algal blooms mostly occur?
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Why algal blooms occur?

Fertilize runoff


What are red tides caused by?

Red tides are a natural phenomenon caused by an increase in the amount of nutrients that algae need usually due to farm runoff. When the amount of nutrients reaches a certain level there is a significant increase in Karenia Brevis algae. Many also believe that red tides occur when there is a combination of very high temperatures, wind, and rainfall.Red tides is mostly caused by the increase of temperature and the difference of temperature between hot surface and a cold layer beneath the hot surface. When it is night, the dinoflagellates move to the cold layer to absorb nutrients. When it is day, they move to top to photosynthesize.Red tides are caused by algal blooms. Certain types of algae in the ocean multiply at rapid rates, typically by excess nutrients found in the water. The algae die and the decay process consumes the oxygen in the water -- one of the reasons these red tides are so destructive.By the way, not all algal blooms are red. It all depends on the algae present which grow quickly.A bloom of red algae, usually due to increased nutrients in the water.These extra nutrients can come either from natural sources or human caused pollution.The red algae both deplete oxygen in the water and produce toxins, which kill fish and other sealife. The toxins can also kill people if they eat seafood (especially filter feeders e.g. clams, mussels, oysters, scallops) caught during the period of the red tide or immediately afterwards.


During what season do tornadoes occur?

Tornadoes usually occur in spring and early summer while hurricanes usually occur in summer and early fall. However, tornadoes can occur at any time of year, and out of season hurricanes have occurred as well.


How diffusion will occur?

diffusion is occur when different concentration gradient is applied


What problems can occur if a highway has sharp bends?

what problems can occur if a highway have sharp bends

Related questions

What is alga boom?

An algal bloom is a rapid increase or accumulation in the population of algae (typically microscopic) in an aquatic system. Algal blooms may occur in freshwater also.


Why algal blooms occur?

Fertilize runoff


How can algal blooms be bad?

Algae blooms are a form of bacteria and can cause skin irritation or respiratory irritation in people who get in the water or handle the algae. Some blooms of blue-green algae can produce chemicals that are toxic to animals and people who drink the untreated water.


What season does lightning occur in?

it mostly occurs in the spring time


What season do disasters from tornadoes usually occur?

Tornadoes mostly occur in spring and early summer.


How does algal blooms?

An algal bloom is a rapid increase or accumulation in the population of algae (typically microscopic) in an aquatic system. Algal blooms may occur in freshwater as well as marine environments. Typically, only one or a small number of phytoplankton species are involved, and some blooms may be recognized by discoloration of the water resulting from the high density of pigmented cells. Although there is no officially recognized threshold level, algae can be considered to be blooming at concentrations of hundreds to thousands of cells per milliliter, depending on the severity. Algal bloom concentrations may reach millions of cells per milliliter. Algal blooms are often green, but they can also be other colors such as yellow-brown or red, depending on the species of algae. Bright green blooms are a result of cyanobacteria (colloquially known as blue-green algae) such as Microcystis. Blooms may also consist of macroalgal (non-phytoplanktonic) species. These blooms are recognizable by large blades of algae that may wash up onto the shoreline. Examples of common harmful effects of HABs include:the production of neurotoxins which cause mass mortalities in fish, seabirds, sea turtles, and marine mammalshuman illness or death via consumption of seafood contaminated by toxic algaemechanical damage to other organisms, such as disruption of epithelial gill tissues in fish, resulting in asphyxiationoxygen depletion of the water column (hypoxia or anoxia) from cellular respiration and bacterial degradation


How algal bloom does occur?

An algal bloom is a rapid increase or accumulation in the population of algae (typically microscopic) in an aquatic system. Algal blooms may occur in freshwater as well as marine environments. Typically, only one or a small number of phytoplankton species are involved, and some blooms may be recognized by discoloration of the water resulting from the high density of pigmented cells. Although there is no officially recognized threshold level, algae can be considered to be blooming at concentrations of hundreds to thousands of cells per milliliter, depending on the severity. Algal bloom concentrations may reach millions of cells per milliliter. Algal blooms are often green, but they can also be other colors such as yellow-brown or red, depending on the species of algae. Bright green blooms are a result of cyanobacteria (colloquially known as blue-green algae) such as Microcystis. Blooms may also consist of macroalgal (non-phytoplanktonic) species. These blooms are recognizable by large blades of algae that may wash up onto the shoreline. Examples of common harmful effects of HABs include:the production of neurotoxins which cause mass mortalities in fish, seabirds, sea turtles, and marine mammalshuman illness or death via consumption of seafood contaminated by toxic algaemechanical damage to other organisms, such as disruption of epithelial gill tissues in fish, resulting in asphyxiationoxygen depletion of the water column (hypoxia or anoxia) from cellular respiration and bacterial degradation


In what season do tornadoes occur?

Mostly during the spring time in March though June, but they can occur at any time of year.


When do algai blooms occur?

what are dinoflagellates comonly called


Do tornadoes occur mostly in spring or summer?

In the US, tornado season begins in the Spring.


What is the name used to describe a rapid algal growth that subsequently kills off other life forms in a lake?

An algal bloom, although this can also occur in the sea.Algal blooms are sometimes naturally occurring, but normally occur in polluted water or when large amounts of nitrogen based fertiliser (such as run-off from agricultural land) enters an open water system. The algae multiply rapidly (if the weather conditions are favourable), consuming all the oxygen they can in the process. Most fish and other organisms then die from suffocation.


What season do blizzards mostly occur?

Blizzards occur in the winter time. Blizzards are a snow storm that is larger than normal with very high winds.