Welcome to Biology Notes Online! We are the BNO Team, dedicated to providing high-quality, accessible biology study notes for students and teachers alike. Our goal is to simplify complex biological concepts and present them in an easy-to-understand format, entirely free of charge. Whether you're preparing for exams, teaching a class, or simply passionate about biology, our comprehensive notes are designed to support your learning and teaching journey.
What is Zonation? Definition of Zonation Zonation is the spatial arrangement of distinct ecological communities based on predominant flora and fauna across a gradient, influenced by both biotic and abiotic factors. How Does Zonation Works? Zonation in ecological contexts refers to the distinct stratification or partitioning of habitats or ecosystems into zones, each characterized by … Read more
What is Altitudinal Zonation? Definition of Altitudinal Zonation Altitudinal zonation refers to the stratification of ecosystems in mountainous regions due to varying environmental conditions at different elevations, leading to distinct habitats that support specific vegetation and animal species. Factors of Altitudinal zonation Altitudinal zonation in mountainous regions is shaped by a myriad of environmental determinants. … Read more
What is Vertical Zonation? Vertical zonation refers to the distribution of different species or communities in distinct vertical layers or zones in an environment. This phenomenon is most commonly observed in marine ecosystems, especially along rocky intertidal shores, but it can also be found in forests and other terrestrial habitats. In each of these environments, … Read more
Biodiversity is a term that might sound complicated, but it’s actually a simple and really important idea. Imagine you’re walking through a forest. You see different types of trees, hear various birds singing, and spot all sorts of insects and animals. All these different forms of life, including the plants, animals, and microorganisms, as well … Read more
Characteristics of Community These characteristics collectively contribute to the unique structure, function, and dynamics of communities, highlighting the complex and interconnected nature of ecological systems. Understanding these characteristics helps ecologists study and conserve communities and the interactions that occur within them. 1. Trophic organization Trophic organization is a fundamental concept in ecology that describes the … Read more
What is Biological Magnification/Biomagnification? Biomagnification or biological magnification is the process by which certain chemicals accumulate in living organisms to a greater concentration than in the non-living environment. Causes of Biological Magnification/Biomagnification The principal causes of biomagnification are as follows: 1. Agriculture 2. Organic Contaminants 3. Industrial Activities 4. Mining Activities in the Ocean Process … Read more
Grassland Ecosystem Definition Geographical distribution Different Names of Grasslands Other Names of Grasslands Place Name of the grassland North America Prairies Eurasia (Europe and Asia) Steppes Africa Savanna South America Pampas India Grassland, Savanna Brazil Campos Venezuela Llanos South Africa Veld Australia Down Savannas are a popular term for tropical grasslands. They are found in … Read more
Desert Ecosystem Definition Characteristics of Desert Ecosystem Component of a desert ecosystem Due to minimal precipitation, the desert ecosystem contains fewer plants. These places have fewer than 255 millimetres of precipitation and high or low temperatures. This ecosystem’s evaporation rate is extremely high. Depending on the availability of water, dates, cotton, millet, etc. are cultivated … Read more
What is Biomass Pyramid? Definition of Biomass Pyramid A biomass pyramid is a graphical representation of the total biomass or organic matter at each trophic level in an ecosystem, illustrating the flow of energy from producers to consumers. What is Biomass? In the scientific realm of ecology, “biomass” is defined as the cumulative mass of … Read more
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