MEGA QUIZ- 1 (1 to 10)
The white water phenomenon is due to the abundance of
Dinoflagelates
Cocolithophores
Protozoan
Diatoms
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| source - usra |
The white water phenomenon is due to the abundance of Coccolithophores.
Coccolithophores are a type of phytoplankton that have calcium carbonate plates called coccoliths. These plates give them a white appearance, which is why they are often called "white cells". Coccolithophores are found in all oceans, but they are most abundant in tropical and subtropical waters.
When there is an abundance of coccolithophores in the water, they can cause the water to appear white or milky. This is because the coccoliths scatter sunlight, which makes the water appear opaque. The white water phenomenon can sometimes be seen from space, and it can have a significant impact on the marine environment.
For example, the white water phenomenon can reduce the amount of sunlight that reaches the ocean floor, which can harm marine plants and animals. The white water phenomenon can also increase the amount of algae in the water, which can lead to harmful algal blooms.
The white water phenomenon is a natural phenomenon, but it can be exacerbated by human activities, such as nutrient pollution from agriculture and sewage.
Diatoms belong to the class
Chrysophyceae
Bacillariophyceae
Cyanophyceae
Dinophyceae
 |
| source - wikipedia |
Diatoms belong to the class Bacillariophyceae.
Diatoms are a type of algae that are characterized by their silica-rich cell walls. They are found in both freshwater and marine environments, and they play an important role in the food chain. Diatoms are also a valuable source of oil and other industrial products.
The class Bacillariophyceae is divided into two orders: the Bacillariales and the Surirellaceae. The Bacillariales are the largest order, and they include the majority of diatom species. The Surirellaceae are a small order that includes only a few species.
Diatoms are an important part of the marine food web. They are a major source of food for small animals, such as zooplankton. Zooplankton are, in turn, a major food source for larger animals, such as fish and whales.
Diatoms are also a valuable source of oil and other industrial products. Diatomaceous earth is a fine-grained sedimentary rock that is made up of the fossilized remains of diatoms. Diatomaceous earth is used in a variety of applications, including filtration, abrasives, and kitty litter.
Diatoms are a fascinating and important group of organisms. They play an important role in the environment and the economy.
The term ecosystem was coined by
Hensen
Tausley
J.S.Nelson
Carpenter
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| source - wikipedia |
The term ecosystem was coined by Arthur Tansley in 1935.
An ecosystem is a biological community of interacting organisms and their physical environment. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Ecosystems can be found at all scales, from small ponds to entire biomes.
Tansley was a British ecologist who is considered to be one of the founders of modern ecology. He was the first to use the term "ecosystem" to describe the interactions between organisms and their environment. Tansley's work helped to lay the foundation for our understanding of how ecosystems function.
Salinity reduce the solubility
Carbon dioxide
Oxygen
Ammonia
Nitrogen
Salinity reduces the solubility of oxygen.
The solubility of gases in water decreases with the addition of other solutes, particularly electrolytes. This is because the solutes interfere with the ability of water molecules to dissolve gases. The effect is more pronounced for gases that are less soluble in water, such as oxygen.
For example, the solubility of oxygen in freshwater is about 8 mg/L, while the solubility of oxygen in seawater is about 6 mg/L. This means that there is less oxygen dissolved in seawater than in freshwater.
The reduction in the solubility of oxygen in seawater can have a significant impact on marine life. Many marine organisms, such as fish, need oxygen to survive. When the solubility of oxygen is reduced, these organisms can experience stress and may even die.
The reduction in the solubility of oxygen in seawater is a major concern for marine ecosystems. It is caused by a number of factors, including climate change, pollution, and overfishing. It is important to take steps to reduce the impact of these factors so that marine ecosystems can be protected.
Organisms inhabiting the bottom
Littoral
Limnetic
Benthos
None
source - wikipedia
The organisms inhabiting the bottom are called benthos.
Benthos is the community of organisms that live on or near the seabed, river, lake, or stream bottom also known as the benthic zone. This community lives in or near marine or freshwater sedimentary environments from tidal pools along the foreshore, out to the continental shelf, and then down to the depths.
Benthos can be divided into three main groups:
- Sediment feeders: These organisms feed on the sediment, such as worms, clams, and snails.
- Detritus feeders: These organisms feed on dead organic matter, such as bacteria, fungi, and insects.
- Predators: These organisms prey on other organisms, such as fish, crabs, and lobsters.
Benthos play an important role in the marine ecosystem. They help to recycle nutrients, break down organic matter, and provide food for other organisms. Benthos are also an important source of food for humans.
Benthos are a diverse group of organisms that play an important role in the marine ecosystem. They are essential for the health of the ocean and for the survival of other marine life.
In ………… ponds water exists only in the spring season.
Autumnal Ponds
Vernal Ponds
Aestival Ponds
Vernal Autumnal ponds
source - wikipedia
The answer is vernal ponds.
Vernal ponds ae temporary ponds that fill with water in the spring and dry up in the summer. They are typically found in areas with sandy or gravelly soils that drain quickly. Vernal ponds are important habitats for a variety of plants and animals, including amphibians, reptiles, insects, and birds.
The name "vernal" comes from the Latin word "ver," which means "spring." Vernal ponds are typically shallow and have muddy bottoms. They are often surrounded by vegetation, such as grasses, shrubs, and trees. Vernal ponds are important for a variety of reasons. They provide a place for amphibians to breed and raise their young. They also provide a habitat for a variety of insects and other invertebrates. Vernal ponds also help to filter water and improve water quality.
Vernal ponds are a valuable resource, but they are also threatened by a variety of factors. Development, pollution, and climate change are all threats to vernal ponds. It is important to protect vernal ponds so that they can continue to provide habitat for a variety of plants and animals.
……….is the India’s largest coastal lagoon in India?
Hebbal lake
Powai Lake
Chilka Lake
Dal Lake
source - the indian express
The answer is Chilka Lake.
Chilka Lake is a brackish water lagoon in the Indian state of Odisha. It is located on the east coast of India, at the mouth of the Daya River, flowing into the Bay of Bengal. It is the largest brackish water lagoon in India and the second largest coastal lagoon in the world.
The lake covers an area of 1,165 square kilometers (450 sq mi) and has a maximum depth of 10 meters (33 ft). It is home to a variety of marine and freshwater life, including fish, shrimp, crabs, and dolphins. The lake is also an important stopover for migratory birds.
Chilka Lake is a popular tourist destination and is known for its fishing, boating, and bird watching. The lake is also an important source of livelihood for the local people, who depend on it for fishing, agriculture, and tourism.
The lake is facing a number of threats, including pollution, overfishing, and climate change. It is important to take steps to protect the lake so that it can continue to provide benefits to the people and the environment.
………..is a crescent shaped lake?
Nainital Lake
Chilka lake
Bhimtallake
Vembanadlake
source - wkipedia
The crescent-shaped lake you are looking for is Nainital Lake.
Nainital Lake is a freshwater lake in the Indian state of Uttarakhand. It is located in the Kumaon region of the Himalayas, at an altitude of 1,938 meters (6,359 ft). The lake is 2.5 kilometers (1.6 mi) long and 1.3 kilometers (0.81 mi) wide, with a maximum depth of 137 meters (450 ft).
The lake is surrounded by mountains and has a crescent shape. It is fed by several streams and rivers, and its outlet is the Naini River. The lake is a popular tourist destination and is known for its beauty, its religious significance, and its water sports.
The lake is also a popular destination for bird watching. Over 100 species of birds have been recorded in the area, including the common crane, the bar-headed goose, and the Himalayan griffon vulture.
The lake is facing a number of threats, including pollution, overfishing, and climate change. It is important to take steps to protect the lake so that it can continue to provide benefits to the people and the environment.
………… is also called as false bottom.
Marshes
Swamps
Bogs
Fens
source - wikipedia
A bog is also called as false bottom.
A bog is a wetland that accumulates peat. Peat is a type of soil that is made up of partially decayed plant material. Bogs are typically found in areas with cool, wet climates. They are often surrounded by trees and shrubs. Bogs are home to a variety of plants and animals, including mosses, ferns, sphagnum moss, pitcher plants, sundews, bog turtles, and bog lemmings.
The false bottom of a bog is a layer of dead plant material that has accumulated over time. This layer is often soft and spongy, and it can be difficult to walk on. The false bottom is important for the bog ecosystem because it helps to keep the water table high and provides a habitat for a variety of plants and animals.
Father of limnology -
J. Lorenz
V. Hansen
F. Simony
F.A.Forel
source - wikipedia
François-Alphonse Forel was a Swiss scientist and naturalist who is widely recognized as the "Father of Limnology." He was born on February 2, 1841, in Morges, Switzerland, and passed away on August 7, 1912.
Forel's notable contributions to the field of limnology primarily revolve around his extensive research on Lake Geneva (also known as Lake Léman), located between Switzerland and France. He conducted comprehensive studies on the physical, chemical, and biological characteristics of the lake, pioneering the scientific understanding of inland waters.
Here are some key aspects of Forel's work:
Physical Limnology: Forel conducted detailed investigations into the physical properties of Lake Geneva, such as its temperature, water currents, and sediment dynamics. He developed novel techniques and instruments for measuring these parameters, contributing to the establishment of physical limnology as a scientific discipline.
Chemical Limnology:
Forel extensively studied the chemical composition of Lake Geneva, including the analysis of water samples for various parameters such as dissolved oxygen, pH, and nutrient concentrations. His research shed light on the sources and dynamics of nutrients, the impact of pollution, and the processes governing the lake's chemistry.
Biological Limnology:
Forel's studies also focused on the biological aspects of Lake Geneva, including the flora and fauna inhabiting the lake. He conducted surveys of microscopic organisms, algae, and zooplankton, and investigated the interrelations between different organisms and their ecological roles within the lake ecosystem.
Lake Classification:
Based on his research, Forel proposed a classification system for lakes, categorizing them based on their origin, morphology, and ecological characteristics. His classification scheme, known as the "Forel-Ule system," provided a framework for understanding and comparing lakes globally.
Environmental Advocacy: I
n addition to his scientific pursuits, Forel was an early advocate for environmental conservation. He recognized the importance of preserving natural resources and actively campaigned for the protection of Lake Geneva and its surroundings. His efforts played a crucial role in raising awareness about the need for environmental stewardship.
François-Alphonse Forel's contributions to limnology established a solid foundation for the study of lakes and freshwater ecosystems. His meticulous research, innovative methods, and environmental advocacy significantly advanced our understanding of inland waters, making him a seminal figure in the field of limnology.
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